{"id":615,"date":"2025-11-17T08:43:27","date_gmt":"2025-11-17T00:43:27","guid":{"rendered":"http:\/\/103.236.53.242\/?p=615"},"modified":"2025-11-27T15:20:28","modified_gmt":"2025-11-27T07:20:28","slug":"get-ham-a6","status":"publish","type":"post","link":"http:\/\/www.preluna.xyz\/index.php\/2025\/11\/17\/get-ham-a6\/preluna\/technology\/career-skills\/technology-horizon\/","title":{"rendered":"\u65e0\u7ebf\u7535\u8003\u8bd5A\u8bc1\u8003\u8bd5\u6307\u5357(6)"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">\u5236\u7ea6\u73b0\u4ee3\u65e0\u7ebf\u7535\u63a5\u6536\u673a\u7075\u654f\u5ea6\u7684\u4e3b\u8981\u56e0\u7d20:<\/h2>\n\n\n\n<p>\u63a5\u6536\u673a\u7684\u7075\u654f\u5ea6\uff0c\u7b80\u5355\u6765\u8bf4\u5c31\u662f\u5b83\u53ef\u9760\u5730\u63a5\u6536\u5fae\u5f31\u4fe1\u53f7\u7684\u80fd\u529b\u3002\u7075\u654f\u5ea6\u8d8a\u9ad8\uff0c\u80fd\u542c\u5230\u7684\u4fe1\u53f7\u5c31\u8d8a\u5fae\u5f31\u3002\u5236\u7ea6\u5b83\u7684\u56e0\u7d20\u662f\u4e00\u4e2a\u201c\u4fe1\u53f7\u94fe\u201d\u95ee\u9898\uff0c\u4ece\u5929\u7ebf\u5f00\u59cb\u5230\u626c\u58f0\u5668\u7ed3\u675f\uff0c\u6bcf\u4e2a\u73af\u8282\u90fd\u53ef\u80fd\u6210\u4e3a\u74f6\u9888\u3002\u4e3b\u8981\u56e0\u7d20\u5305\u62ec\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u5185\u90e8\u566a\u58f0 &#8211; \u8fd9\u662f\u6700\u6839\u672c\u7684\u9650\u5236\n<ul class=\"wp-block-list\">\n<li>\u70ed\u566a\u58f0\uff1a \u8fd9\u662f\u7531\u5bfc\u4f53\u5185\u90e8\u7535\u5b50\u7684\u70ed\u8fd0\u52a8\u4ea7\u751f\u7684\uff0c\u5b58\u5728\u4e8e\u6240\u6709\u7535\u963b\u6027\u5143\u4ef6\u4e2d\u3002\u5b83\u7684\u529f\u7387\u662f\u56fa\u5b9a\u7684\uff0c\u4e0e\u9891\u7387\u5e26\u5bbd\u548c\u73af\u5883\u6e29\u5ea6\u76f4\u63a5\u76f8\u5173\u3002\u8fd9\u662f\u63a5\u6536\u673a\u7075\u654f\u5ea6\u7684\u7406\u8bba\u6781\u9650\uff0c\u4e5f\u79f0\u4e3a\u566a\u58f0\u5730\u677f\u3002\u4efb\u4f55\u4fe1\u53f7\u5982\u679c\u6bd4\u8fd9\u4e2a\u566a\u58f0\u5730\u677f\u8fd8\u4f4e\uff0c\u5c31\u4f1a\u88ab\u6df9\u6ca1\u3002<\/li>\n\n\n\n<li>\u534a\u5bfc\u4f53\u5668\u4ef6\u7684\u566a\u58f0\uff1a \u5305\u62ec\u6676\u4f53\u7ba1\uff08BJT\/FET\uff09\u3001\u96c6\u6210\u7535\u8def\u7b49\u81ea\u8eab\u4ea7\u751f\u7684\u566a\u58f0\uff0c\u4f8b\u5982\u6563\u7c92\u566a\u58f0\u3001\u95ea\u70c1\u566a\u58f0\uff081\/f\u566a\u58f0\uff09\u7b49\u3002\u63a5\u6536\u673a\u524d\u7aef\u7684\u7b2c\u4e00\u4e2a\u6709\u6e90\u5668\u4ef6\uff08\u901a\u5e38\u662f\u4f4e\u566a\u58f0\u653e\u5927\u5668LNA\u6216\u6df7\u9891\u5668\uff09\u7684\u566a\u58f0\u6027\u80fd\u5bf9\u6574\u4e2a\u7cfb\u7edf\u81f3\u5173\u91cd\u8981\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\u566a\u58f0\u7cfb\u6570\n<ul class=\"wp-block-list\">\n<li>\u8fd9\u662f\u4e00\u4e2a\u91cf\u5316\u63a5\u6536\u673a\uff08\u6216\u5176\u4e2d\u67d0\u4e2a\u90e8\u4ef6\uff09\u4f7f\u5176\u4fe1\u566a\u6bd4\u6076\u5316\u7684\u7a0b\u5ea6\u7684\u6307\u6807\u3002\u4e00\u4e2a\u7406\u60f3\u7684\u3001\u65e0\u566a\u58f0\u7684\u63a5\u6536\u673a\uff0c\u5176NF\u4e3a0 dB\uff0c\u8f93\u51fa\u4fe1\u566a\u6bd4\u7b49\u4e8e\u8f93\u5165\u4fe1\u566a\u6bd4\u3002\u4f46\u73b0\u5b9e\u4e2d\uff0c\u63a5\u6536\u673a\u81ea\u8eab\u7684\u566a\u58f0\u4f1a\u53e0\u52a0\u5728\u4fe1\u53f7\u4e0a\uff0c\u4f7f\u5f97\u8f93\u51fa\u4fe1\u566a\u6bd4\u53d8\u5dee\u3002NF\u503c\u8d8a\u4f4e\uff0c\u63a5\u6536\u673a\u7684\u7075\u654f\u5ea6\u5c31\u8d8a\u9ad8<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\u524d\u7aef\u9009\u62e9\u6027\u3001\u955c\u50cf\u4e0e\u5047\u54cd\u5e94\n<ul class=\"wp-block-list\">\n<li>\u5982\u679c\u63a5\u6536\u673a\u524d\u7aef\uff08\u5728\u7b2c\u4e00\u6b21\u9891\u7387\u8f6c\u6362\u4e4b\u524d\uff09\u7684\u6ee4\u6ce2\u6027\u80fd\u4e0d\u597d\uff0c\u5f3a\u5927\u7684\u5e26\u5916\u4fe1\u53f7\uff08\u5982\u5f3a\u529b\u7684\u672c\u5730\u5e7f\u64ad\u7535\u53f0\u3001\u5176\u4ed6\u4e1a\u4f59\u7535\u53f0\uff09\u4f1a\u8fdb\u5165\u63a5\u6536\u901a\u9053\u3002<\/li>\n\n\n\n<li>\u8fd9\u4e9b\u5f3a\u4fe1\u53f7\u53ef\u80fd\u4f1a\uff1a\n<ul class=\"wp-block-list\">\n<li>\u8fc7\u8f7d\u524d\u7aef\u653e\u5927\u5668\uff1a \u5bfc\u81f4\u589e\u76ca\u538b\u7f29\uff0c\u4f7f\u5fae\u5f31\u4fe1\u53f7\u5f97\u4e0d\u5230\u653e\u5927\u3002<\/li>\n\n\n\n<li>\u4ea7\u751f\u4ea4\u8c03\u5931\u771f\uff1a \u4e24\u4e2a\u6216\u591a\u4e2a\u5f3a\u4fe1\u53f7\u5728\u975e\u7ebf\u6027\u5143\u4ef6\u4e2d\u6df7\u5408\uff0c\u4ea7\u751f\u7684\u65b0\u4fe1\u53f7\u6070\u597d\u843d\u5728\u63a5\u6536\u9891\u7387\u4e0a\uff0c\u5f62\u6210\u5e72\u6270\u3002<\/li>\n\n\n\n<li>\u5f15\u53d1\u955c\u50cf\u9891\u7387\u5e72\u6270\uff1a \u8d85\u5916\u5dee\u63a5\u6536\u673a\u7684\u56fa\u6709\u73b0\u8c61\uff0c\u5982\u679c\u524d\u7aef\u6ee4\u6ce2\u5668\u9009\u62e9\u6027\u4e0d\u4f73\uff0c\u955c\u50cf\u9891\u7387\u7684\u4fe1\u53f7\u4e5f\u4f1a\u88ab\u63a5\u6536\u5e76\u8f6c\u6362\u4e3a\u4e2d\u9891\uff0c\u5f62\u6210\u5047\u4fe1\u53f7\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\u76f8\u4f4d\u566a\u58f0\n<ul class=\"wp-block-list\">\n<li>\u8fd9\u6e90\u4e8e\u63a5\u6536\u673a\u672c\u673a\u632f\u8361\u5668\u7684\u9891\u7387\u4e0d\u7a33\u5b9a\u5ea6\u3002\u76f8\u4f4d\u566a\u58f0\u4f1a\u4f7f\u5f3a\u4fe1\u53f7\u7684\u566a\u58f0\u8fb9\u5e26\u6269\u5c55\uff0c\u4ece\u800c\u201c\u6df9\u6ca1\u201d\u90bb\u8fd1\u7684\u5fae\u5f31\u4fe1\u53f7\u3002\u5b83\u76f4\u63a5\u5f71\u54cd\u63a5\u6536\u673a\u5728\u5b58\u5728\u5f3a\u4fe1\u53f7\u65f6\u5206\u8fa8\u76f8\u90bb\u5fae\u5f31\u4fe1\u53f7\u7684\u80fd\u529b\uff0c\u662f\u5236\u7ea6\u52a8\u6001\u8303\u56f4\u548c\u6709\u6548\u7075\u654f\u5ea6\u7684\u5173\u952e\u56e0\u7d20\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\u4e2d\u9891\u6ee4\u6ce2\u5668\u7684\u5f62\u72b6\u56e0\u5b50\n<ul class=\"wp-block-list\">\n<li>\u4e2d\u9891\u6ee4\u6ce2\u5668\uff08\u5982\u6676\u4f53\u6ee4\u6ce2\u5668\uff09\u51b3\u5b9a\u4e86\u63a5\u6536\u673a\u533a\u5206\u7d27\u5bc6\u76f8\u90bb\u4fe1\u53f7\u7684\u80fd\u529b\u3002\u4e00\u4e2a\u7406\u60f3\u7684\u6ee4\u6ce2\u5668\u662f\u77e9\u5f62\u7684\uff0c\u4f46\u73b0\u5b9e\u4e2d\u6ee4\u6ce2\u5668\u6709\u503e\u659c\u7684\u8fb9\u5e26\u3002\u5f62\u72b6\u56e0\u5b50\uff08\u901a\u5e38\u6307-60 dB\u5e26\u5bbd\u4e0e-6 dB\u5e26\u5bbd\u7684\u6bd4\u503c\uff09\u8d8a\u63a5\u8fd11\uff0c\u8bf4\u660e\u6ee4\u6ce2\u5668\u6027\u80fd\u8d8a\u597d\uff0c\u8fb9\u5e26\u8d8a\u9661\u5ced\uff0c\u80fd\u66f4\u597d\u5730\u8ba9\u5fae\u5f31\u4fe1\u53f7\u901a\u8fc7\uff0c\u540c\u65f6\u963b\u6321\u90bb\u8fd1\u7684\u5f3a\u5e72\u6270\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<p>\u603b\u7ed3\u4e00\u4e0b\uff1a \u73b0\u4ee3\u9ad8\u6027\u80fd\u63a5\u6536\u673a\u7684\u7075\u654f\u5ea6\u6781\u9650\uff0c\u4e3b\u8981\u4e0d\u518d\u662f\u653e\u5927\u500d\u6570\u4e0d\u591f\uff0c\u800c\u662f\u7531\u7cfb\u7edf\u81ea\u8eab\u7684\u566a\u58f0\uff08\u70ed\u566a\u58f0\u3001\u534a\u5bfc\u4f53\u566a\u58f0\uff09 \u548c\u5904\u7406\u5f31\u4fe1\u53f7\u65f6\u907f\u514d\u5f3a\u5e72\u6270\u4fe1\u53f7\u5f71\u54cd\u7684\u80fd\u529b\uff08\u9009\u62e9\u6027\u3001\u52a8\u6001\u8303\u56f4\u3001\u76f8\u4f4d\u566a\u58f0\uff09 \u6240\u5171\u540c\u51b3\u5b9a\u7684\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u672f\u8bed\u201c\u4fe1\u566a\u6bd4\uff08SNR\uff09\u201d\u5728\u4e1a\u4f59\u65e0\u7ebf\u7535\u9886\u57df\u662f\u6307\u4ec0\u4e48\uff1f<\/h2>\n\n\n\n<p>\u4fe1\u566a\u6bd4 \u662f\u4e00\u4e2a\u6781\u5176\u91cd\u8981\u7684\u6838\u5fc3\u6982\u5ff5\uff0c\u5728\u4e1a\u4f59\u65e0\u7ebf\u7535\u9886\u57df\u548c\u6240\u6709\u7535\u5b50\u901a\u4fe1\u9886\u57df\u4e2d\u90fd\u4e00\u6837\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u57fa\u672c\u5b9a\u4e49\n<ul class=\"wp-block-list\">\n<li>\u4fe1\u566a\u6bd4 \u662f\u6307\u6240\u9700\u4fe1\u53f7\u7684\u5f3a\u5ea6\u4e0e\u80cc\u666f\u566a\u58f0\u7684\u5f3a\u5ea6\u4e4b\u95f4\u7684\u6bd4\u503c\u3002<\/li>\n\n\n\n<li>\u5b83\u901a\u5e38\u7528\u5206\u8d1d \u6765\u8868\u793a\u3002<\/li>\n\n\n\n<li>\u516c\u5f0f\u4e3a\uff1a&#8221;SNR (dB) = 10 * log<sub>10<\/sub>(\u4fe1\u53f7\u529f\u7387 \/ \u566a\u58f0\u529f\u7387)&#8221;<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\u5728\u4e1a\u4f59\u65e0\u7ebf\u7535\u4e2d\u7684\u5177\u4f53\u4f53\u73b0\n<ul class=\"wp-block-list\">\n<li>\u201c\u4fe1\u53f7\u201d\uff1a\u5c31\u662f\u4f60\u60f3\u8981\u6536\u542c\u7684\u90a3\u4e2a\u4e1a\u4f59\u7535\u53f0\u53d1\u51fa\u6765\u7684\u7535\u78c1\u6ce2\uff0c\u5728\u63a5\u6536\u673a\u4e2d\u8f6c\u6362\u6210\u7684\u7535\u4fe1\u53f7\u3002\u6bd4\u5982\uff0c\u4e00\u4e2a\u6765\u81ea\u5343\u91cc\u4e4b\u5916\u7684\u706b\u817f\u7684CW\uff08\u7b49\u5e45\u62a5\uff09\u4fe1\u53f7\u6216SSB\uff08\u5355\u8fb9\u5e26\uff09\u8bdd\u97f3\u4fe1\u53f7\u3002<\/li>\n\n\n\n<li>\u201c\u566a\u58f0\u201d\uff1a\u662f\u6240\u6709\u4f60\u201c\u4e0d\u60f3\u542c\u201d\u7684\u5e72\u6270\u7684\u603b\u548c\u3002\u5b83\u4e3b\u8981\u5305\u62ec\uff1a\n<ul class=\"wp-block-list\">\n<li>\u5185\u90e8\u566a\u58f0\uff1a \u4e0a\u9762\u63d0\u5230\u7684\u63a5\u6536\u673a\u81ea\u8eab\u4ea7\u751f\u7684\u70ed\u566a\u58f0\u548c\u534a\u5bfc\u4f53\u566a\u58f0\u3002<\/li>\n\n\n\n<li>\u5916\u90e8\u566a\u58f0\uff1a\u81ea\u7136\u566a\u58f0\uff1a\u5982\u94f6\u6cb3\u7cfb\u566a\u58f0\u3001\u5927\u6c14\u566a\u58f0\uff08\u96f7\u7535\uff09,\u4eba\u4e3a\u566a\u58f0\uff1a\u662f\u73b0\u4ee3\u793e\u4f1a\u7684\u4e3b\u8981\u566a\u58f0\u6e90\uff0c\u5305\u62ec\u7535\u6e90\u7ebf\u566a\u58f0\u3001\u5bb6\u7528\u7535\u5668\uff08\u7535\u8111\u3001\u5145\u7535\u5668\u3001LED\u706f\uff09\u3001\u5de5\u4e1a\u8bbe\u5907\u3001\u7535\u529b\u7ebf\u8f93\u53d8\u7535\u8bbe\u5907\u7b49\u4ea7\u751f\u7684\u5bbd\u9891\u65e0\u7ebf\u7535\u566a\u58f0\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\u4e3a\u4ec0\u4e48SNR\u5982\u6b64\u91cd\u8981\uff1f\n<ul class=\"wp-block-list\">\n<li>SNR\u76f4\u63a5\u51b3\u5b9a\u4e86\u901a\u4fe1\u7684\u53ef\u61c2\u5ea6\u548c\u53ef\u9760\u6027<\/li>\n\n\n\n<li>\u9ad8SNR\uff08\u4f8b\u5982 +20dB\uff09\uff1a\u4fe1\u53f7\u8fdc\u5f3a\u4e8e\u566a\u58f0\u3002\u5728SSB\u901a\u8bdd\u4e2d\uff0c\u58f0\u97f3\u6d2a\u4eae\u3001\u6e05\u6670\uff1b\u5728CW\u62a5\u4e2d\uff0c\u70b9\u5212\u58f0\u54cd\u4eae\u3001\u5bb9\u6613\u5206\u8fa8\uff1b\u5728FT8\u7b49\u6570\u5b57\u6a21\u5f0f\u4e2d\uff0c\u89e3\u7801\u51e0\u4e4e100%\u6b63\u786e\u3002<\/li>\n\n\n\n<li>\u4f4eSNR\uff08\u4f8b\u5982 0dB \u6216\u8d1f\u6570\uff09\uff1a\u4fe1\u53f7\u5f3a\u5ea6\u4e0e\u566a\u58f0\u76f8\u5f53\uff0c\u751a\u81f3\u4f4e\u4e8e\u566a\u58f0\u3002\u5728SSB\u4e2d\uff0c\u8bdd\u97f3\u65ad\u65ad\u7eed\u7eed\uff0c\u6df9\u6ca1\u5728\u201c\u5636\u5636\u201d\u7684\u566a\u58f0\u4e2d\uff0c\u96be\u4ee5\u542c\u61c2\uff1b\u5728CW\u4e2d\uff0c\u70b9\u5212\u58f0\u6a21\u7cca\u4e0d\u6e05\uff0c\u6284\u62a5\u56f0\u96be\uff1b\u5728\u6570\u5b57\u6a21\u5f0f\u4e2d\uff0c\u8bef\u7801\u7387\u6025\u5267\u4e0a\u5347\uff0c\u89e3\u7801\u5931\u8d25\u3002<\/li>\n\n\n\n<li>\u8d1fSNR\uff1a\u5728\u67d0\u4e9b\u5148\u8fdb\u7684\u901a\u4fe1\u6280\u672f\uff08\u5982\u6269\u9891\u901a\u4fe1\u3001FT8\uff09\u4e2d\uff0c\u5373\u4f7f\u4fe1\u53f7\u529f\u7387\u4f4e\u4e8e\u566a\u58f0\u529f\u7387\uff08\u8d1fSNR\uff09\uff0c\u901a\u8fc7\u590d\u6742\u7684\u4fe1\u53f7\u5904\u7406\u6280\u672f\uff0c\u4ecd\u7136\u53ef\u4ee5\u63d0\u53d6\u51fa\u4fe1\u606f\u3002\u4f46\u8fd9\u5728\u4f20\u7edf\u7684\u8bed\u97f3\u548cCW\u901a\u4fe1\u4e2d\u51e0\u4e4e\u662f\u4e0d\u53ef\u80fd\u7684\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<p>\u4e00\u4e2a\u751f\u52a8\u7684\u6bd4\u55bb\uff1a\u5728\u4e00\u4e2a\u5b89\u9759\u7684\u56fe\u4e66\u9986\u91cc\uff08\u4f4e\u566a\u58f0\u73af\u5883\uff09\uff0c\u5373\u4f7f\u6709\u4eba\u7528\u6b63\u5e38\u97f3\u91cf\u8bf4\u8bdd\uff08\u4e2d\u7b49\u4fe1\u53f7\uff09\uff0c\u4f60\u4e5f\u80fd\u542c\u5f97\u5f88\u6e05\u695a\uff08\u9ad8SNR\uff09\u3002\u800c\u5728\u4e00\u4e2a\u5608\u6742\u7684\u6447\u6eda\u97f3\u4e50\u4f1a\u73b0\u573a\uff08\u9ad8\u566a\u58f0\u73af\u5883\uff09\uff0c\u5373\u4f7f\u5bf9\u65b9\u5927\u58f0\u558a\u53eb\uff08\u5f3a\u4fe1\u53f7\uff09\uff0c\u4f60\u4e5f\u53ef\u80fd\u542c\u4e0d\u6e05\uff08\u4f4eSNR\uff09\u3002\u4e1a\u4f59\u65e0\u7ebf\u7535\u7231\u597d\u8005\u6240\u505a\u7684\u5f88\u591a\u52aa\u529b\uff0c\u6bd4\u5982\u4f7f\u7528\u5b9a\u5411\u5929\u7ebf\u3001\u9009\u62e9\u5b89\u9759\u7684\u9891\u70b9\u3001\u964d\u4f4e\u63a5\u6536\u673a\u566a\u58f0\u7cfb\u6570\uff0c\u90fd\u662f\u4e3a\u4e86\u5c3d\u53ef\u80fd\u5730\u63d0\u9ad8\u4fe1\u566a\u6bd4\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u63a5\u6536\u673a\u7684\u566a\u58f0\u7cfb\u6570<\/h2>\n\n\n\n<p>\u5728\u4e1a\u4f59\u65e0\u7ebf\u7535\u901a\u4fe1\uff0c\u5c24\u5176\u662f\u50cfEME\uff08\u5730\u7403-\u6708\u7403-\u5730\u7403\uff09\u901a\u8054\u8fd9\u7c7b\u63a5\u6536\u6781\u5176\u5fae\u5f31\u4fe1\u53f7\u7684\u573a\u666f\u4e0b\uff0c\u63a5\u6536\u673a\u7684\u566a\u58f0\u7cfb\u6570\uff08Noise Figure, \u901a\u5e38\u7528\u7b26\u53f7 F<sub>n<\/sub> \u6216\u5176\u5bf9\u6570\u5f62\u5f0f NF \u8868\u793a\uff09\u786e\u5b9e\u662f\u4e00\u4e2a\u81f3\u5173\u91cd\u8981\u7684\u6838\u5fc3\u6307\u6807\u3002\u5b83\u76f4\u63a5\u51b3\u5b9a\u4e86\u8bbe\u5907\u80fd\u5426\u6709\u6548\u6355\u83b7\u5e76\u8bc6\u522b\u90a3\u4e9b\u6765\u81ea\u9065\u8fdc\u8ddd\u79bb\u3001\u529f\u7387\u5fae\u4e4e\u5176\u5fae\u7684\u4fe1\u53f7\u3002<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u7279\u6027<\/th><th>\u63cf\u8ff0<\/th><\/tr><\/thead><tbody><tr><td>\u6838\u5fc3\u5b9a\u4e49<\/td><td>\u566a\u58f0\u7cfb\u6570 ( F<sub>n<\/sub> ) \u662f\u63a5\u6536\u673a\uff08\u6216\u90e8\u4ef6\uff09\u8f93\u5165\u7aef\u4fe1\u566a\u6bd4 (SNR) \u4e0e\u8f93\u51fa\u7aef\u4fe1\u566a\u6bd4\u7684\u6bd4\u503c\u3002\u5b83\u662f\u4e00\u4e2a\u5927\u4e8e\u7b49\u4e8e1\u7684\u6bd4\u503c\uff08\u7ebf\u6027\u503c\uff09\uff0c\u4e5f\u5e38\u7528\u5206\u8d1d(dB)\u8868\u793a\uff0c\u8bb0\u4f5c NF \u3002<\/td><\/tr><tr><td>\u7269\u7406\u610f\u4e49<\/td><td>\u8861\u91cf\u63a5\u6536\u673a\u81ea\u8eab\u5185\u90e8\u4ea7\u751f\u7684\u9644\u52a0\u566a\u58f0\u591a\u5c11\u7684\u6307\u6807\u3002\u4e00\u4e2a\u7406\u60f3\u7684\u3001\u65e0\u566a\u58f0\u7684\u63a5\u6536\u673a\uff0c F<sub>n<\/sub> = 1 ( NF = 0 dB)\u3002\u5b9e\u9645\u63a5\u6536\u673a\u90fd\u4f1a\u5f15\u5165\u989d\u5916\u566a\u58f0\uff0c\u4f7f\u8f93\u51fa\u4fe1\u566a\u6bd4\u53d8\u5dee\uff0c F<sub>n<\/sub> &gt; 1 ( NF &gt; 0 dB)\u3002<\/td><\/tr><tr><td>\u5bf9\u5fae\u5f31\u4fe1\u53f7\u63a5\u6536\u7684\u5f71\u54cd<\/td><td>F<sub>n<\/sub> \u76f4\u63a5\u51b3\u5b9a\u63a5\u6536\u673a\u7684\u7075\u654f\u5ea6\u3002 F<sub>n<\/sub>\u503c\u8d8a\u5c0f\uff08NF \u8d8a\u4f4e\uff09\uff0c\u610f\u5473\u7740\u63a5\u6536\u673a\u81ea\u8eab\u4ea7\u751f\u7684\u566a\u58f0\u8d8a\u5c11\uff0c\u80fd\u591f\u89e3\u8c03\u51fa\u7684\u6700\u5c0f\u4fe1\u53f7\u5f3a\u5ea6\u5c31\u8d8a\u4f4e\uff0c\u7075\u654f\u5ea6\u8d8a\u9ad8\u3002<\/td><\/tr><tr><td>\u7ea7\u8054\u7cfb\u7edf\u603b\u566a\u58f0\u7cfb\u6570<\/td><td>\u6574\u4e2a\u63a5\u6536\u7cfb\u7edf\u7684\u603b\u566a\u58f0\u7cfb\u6570\u4e3b\u8981\u53d6\u51b3\u4e8e\u7b2c\u4e00\u7ea7\u7535\u8def\uff08\u901a\u5e38\u662f\u4f4e\u566a\u58f0\u653e\u5927\u5668 LNA\uff09 \u7684\u566a\u58f0\u7cfb\u6570\u548c\u589e\u76ca\u3002\u540e\u7eed\u5404\u7ea7\u7684\u5f71\u54cd\u4f1a\u88ab\u7b2c\u4e00\u7ea7\u7684\u589e\u76ca\u6240\u6291\u5236\u3002\u5176\u8ba1\u7b97\u516c\u5f0f\uff08Friis\u516c\u5f0f\uff09\u4e3a\uff1aP<sub>r<\/sub>=P<sub>t<\/sub>G<sub>t<\/sub>G<sub>r<\/sub>\u03bb<sup>2<\/sup>\/\uff084\u03c0R\uff09<sup>2<\/sup><br>\u5728\u65e0\u7ebf\u4f20\u8f93\u94fe\u8def\u4e2d\uff0c\u5047\u8bbe\u53d1\u5c04\u5929\u7ebf\u7684\u529f\u7387\u4e3aPt,\u53d1\u5c04\u5929\u7ebf\u589e\u76ca\u4e3aGt,\u63a5\u6536\u5929\u7ebf\u589e\u76ca\u4e3aGr,\u63a5\u6536\u529f\u7387\u4e3aPr\uff0c\u5de5\u4f5c\u6ce2\u957f\u4e3a\u03bb\uff0c\u4e24\u5929\u7ebf\u76f8\u8ddd\u4e3aR\u3002<\/td><\/tr><tr><td>\u4e0e\u7075\u654f\u5ea6\u7684\u5b9a\u91cf\u5173\u7cfb<\/td><td>\u63a5\u6536\u673a\u7075\u654f\u5ea6 S<sub>min <\/sub>\u7684\u7406\u8bba\u8ba1\u7b97\u516c\u5f0f\u4e3a\uff1a S<sub>min<\/sub> = -174dBm+ NF + 10log<sub>10<\/sub>(B) + \u6240\u9700\u8f93\u51fa\u4fe1\u566a\u6bd4 \u3002\u5176\u4e2d -174 dBm \u662f\u5ba4\u6e29\u4e0b ( 290K ) 1Hz \u5e26\u5bbd\u5185\u7684\u70ed\u566a\u58f0\u5e95\u3002<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">\u7406\u89e3\u566a\u58f0\u7cfb\u6570\u7684\u5173\u952e\u70b9<\/h3>\n\n\n\n<p>\u4ece\u5b9a\u4e49\u6df1\u5165\u7406\u89e3\uff1a\u566a\u58f0\u7cfb\u6570 <strong><em>F<sub>n<\/sub><\/em><\/strong>\u7684\u4e25\u683c\u5b9a\u4e49\u662f\u8f93\u5165\u7aef\u4fe1\u566a\u6bd4\u4e0e\u8f93\u51fa\u7aef\u4fe1\u566a\u6bd4\u7684\u6bd4\u503c:<strong><em>F<sub>n<\/sub>=(SNR)<sub>in<\/sub>\/(SNR)<sub>out<\/sub><\/em><\/strong>\uff0c\u5bf9\u4e8e\u4e00\u4e2a\u7406\u60f3\u7684\u3001\u4e0d\u5f15\u5165\u4efb\u4f55\u989d\u5916\u566a\u58f0\u7684\u8bbe\u5907\uff0c\u8f93\u51fa\u4fe1\u566a\u6bd4\u7b49\u4e8e\u8f93\u5165\u4fe1\u566a\u6bd4\uff0c\u6b64\u65f6<strong><em>F<sub>n<\/sub><\/em><\/strong>= 1 ( NF = 0 dB)\u3002\u4f46\u73b0\u5b9e\u4e2d\uff0c\u4efb\u4f55\u7535\u5b50\u8bbe\u5907\u90fd\u4f1a\u5728\u5904\u7406\u4fe1\u53f7\u7684\u8fc7\u7a0b\u4e2d\u6dfb\u52a0\u81ea\u8eab\u7684\u566a\u58f0\uff0c\u5bfc\u81f4\u8f93\u51fa\u4fe1\u566a\u6bd4\u4f4e\u4e8e\u8f93\u5165\u4fe1\u566a\u6bd4\uff0c\u56e0\u6b64 F<sub>n<\/sub> > 1 ( NF > 0 dB )\u3002<strong>\u566a\u58f0\u7cfb\u6570\u76f4\u89c2\u5730\u53cd\u6620\u4e86\u63a5\u6536\u673a\u5185\u90e8\u566a\u58f0\u4f7f\u4fe1\u566a\u6bd4\u6076\u5316\u7684\u7a0b\u5ea6\u3002<\/strong><\/p>\n\n\n\n<p><strong><em>\u4e3a\u4f55\u5b83\u5bf9EME\u901a\u8054\u81f3\u5173\u91cd\u8981<\/em><\/strong>,\u5728EME\u901a\u8054\u4e2d\uff0c\u4fe1\u53f7\u7ecf\u8fc7\u5730\u6708\u5f80\u8fd4\u8fd180\u4e07\u516c\u91cc\u7684\u8def\u5f84\u4f20\u64ad\uff0c\u5230\u8fbe\u5730\u7403\u65f6\u7684\u529f\u7387\u5df2\u7ecf\u6781\u5176\u5fae\u5f31\uff0c\u5e38\u5e38\u63a5\u8fd1\u751a\u81f3\u4f4e\u4e8e\u63a5\u6536\u673a\u672c\u8eab\u7684\u566a\u58f0\u6c34\u5e73\u3002\u6b64\u65f6\uff0c\u4e00\u4e2a\u4f4e\u7684\u566a\u58f0\u7cfb\u6570\u81f3\u5173\u91cd\u8981\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u964d\u4f4e\u53ef\u68c0\u6d4b\u4fe1\u53f7\u95e8\u69db\uff1a\u7531\u7075\u654f\u5ea6\u516c\u5f0f\u53ef\u77e5\uff0c\u5728\u5e26\u5bbd\u548c\u6240\u9700\u4fe1\u566a\u6bd4\u56fa\u5b9a\u7684\u60c5\u51b5\u4e0b\uff0c\u566a\u58f0\u7cfb\u6570 NF \u6bcf\u964d\u4f4e1 dB\uff0c\u7075\u654f\u5ea6\u5c31\u80fd\u6539\u55841 dB\uff0c\u8fd9\u610f\u5473\u7740\u80fd\u68c0\u6d4b\u5230\u66f4\u5f31\u7684\u4fe1\u53f7\u3002<\/li>\n\n\n\n<li>\u63d0\u5347\u4fe1\u566a\u6bd4\uff1a\u5373\u4f7f\u4fe1\u53f7\u80fd\u88ab\u68c0\u6d4b\u5230\uff0c\u4f4e\u7684\u7cfb\u7edf\u566a\u58f0\u4e5f\u610f\u5473\u7740\u6700\u7ec8\u8f93\u51fa\u4fe1\u566a\u6bd4\u66f4\u9ad8\uff0c\u8fd9\u5bf9\u4e8e\u6210\u529f\u89e3\u8c03CW\uff08\u7b49\u5e45\u62a5\uff09\u6216\u6570\u5b57\u6a21\u5f0f\uff08\u5982FT8\uff09\u7684\u4fe1\u53f7\u81f3\u5173\u91cd\u8981\uff0c\u80fd\u6709\u6548\u51cf\u5c11\u8bef\u7801\u7387\u3002<\/li>\n<\/ul>\n\n\n\n<p><strong>\u6d4b\u91cf\u566a\u58f0\u7cfb\u6570\u7684\u65b9\u6cd5<\/strong>,\u6d4b\u91cf\u566a\u58f0\u7cfb\u6570\u6709\u591a\u79cd\u65b9\u6cd5\uff0c\u9002\u7528\u4e8e\u4e0d\u540c\u573a\u666f\u548c\u9700\u6c42\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4e13\u7528\u566a\u58f0\u7cfb\u6570\u6d4b\u8bd5\u4eea\uff1a\u8fd9\u662f\u6700\u76f4\u63a5\u3001\u6700\u51c6\u786e\u7684\u65b9\u6cd5\uff0c\u4f46\u8bbe\u5907\u901a\u5e38\u975e\u5e38\u6602\u8d35\u3002<\/li>\n\n\n\n<li>Y\u56e0\u5b50\u6cd5\uff1a\u8fd9\u662f\u4e00\u79cd\u5e38\u7528\u4e14\u76f8\u5bf9\u51c6\u786e\u7684\u65b9\u6cd5\uff0c\u9700\u8981\u4e00\u500b\u5df2\u77e5\u8d85\u566a\u6bd4\uff08ENR\uff09\u7684\u566a\u58f0\u6e90\u548c\u4e00\u53f0\u9891\u8c31\u5206\u6790\u4eea\u3002\u901a\u8fc7\u6d4b\u91cf\u566a\u58f0\u6e90\u5f00\u542f\u548c\u5173\u95ed\u65f6\u8f93\u51fa\u566a\u58f0\u529f\u7387\u7684\u53d8\u5316\uff08Y\u56e0\u5b50\uff09\u6765\u8ba1\u7b97\u566a\u58f0\u7cfb\u6570\u3002<\/li>\n\n\n\n<li>\u589e\u76ca\u6cd5\uff1a\u8fd9\u79cd\u65b9\u6cd5\u9700\u8981\u77e5\u9053\u88ab\u6d4b\u8bbe\u5907\u7684\u589e\u76ca\uff0c\u7136\u540e\u7528\u9891\u8c31\u5206\u6790\u4eea\u6d4b\u91cf\u5176\u8f93\u51fa\u566a\u58f0\u529f\u7387\u8c31\u5bc6\u5ea6\u3002\u8be5\u65b9\u6cd5\u5728\u6d4b\u91cf\u9ad8\u589e\u76ca\u6216\u9ad8\u566a\u58f0\u7cfb\u6570\u7684\u8bbe\u5907\u65f6\u6bd4\u8f83\u51c6\u786e\uff0c\u4f46\u53d7\u9650\u4e8e\u9891\u8c31\u5206\u6790\u4eea\u81ea\u8eab\u7684\u566a\u58f0\u57fa\u5e95\u3002<\/li>\n<\/ul>\n\n\n\n<p><strong>\u4f18\u5316\u63a5\u6536\u7cfb\u7edf\u7684\u5efa\u8bae<\/strong>,\u57fa\u4e8e\u566a\u58f0\u7cfb\u6570\u7684\u7279\u6027\uff0c\u4f60\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u65b9\u5f0f\u4f18\u5316\u4f60\u7684EME\u63a5\u6536\u7cfb\u7edf\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u4f18\u5316\u7cfb\u7edf\u524d\u7aef\uff1a\u6839\u636e\u7ea7\u8054\u516c\u5f0f\uff0c\u6574\u4e2a\u7cfb\u7edf\u7684\u566a\u58f0\u6027\u80fd\u4e3b\u8981\u7531\u7b2c\u4e00\u7ea7\u51b3\u5b9a\u3002\u56e0\u6b64\uff0c\u5728\u5929\u7ebf\u4e4b\u540e\u3001\u4efb\u4f55\u6709\u635f\u8017\u7684\u7535\u7f06\u6216\u5668\u4ef6\uff08\u5982\u5f00\u5173\u3001\u6ee4\u6ce2\u5668\uff09\u4e4b\u524d\uff0c\u5c3d\u53ef\u80fd\u63a5\u8fd1\u5929\u7ebf\u9988\u6e90\u5904\u5b89\u88c5\u4e00\u4e2a\u9ad8\u6027\u80fd\u7684\u4f4e\u566a\u58f0\u653e\u5927\u5668\uff08LNA\uff09 \u662f\u63d0\u5347\u63a5\u6536\u6027\u80fd\u6700\u6709\u6548\u7684\u624b\u6bb5\u3002\u8fd9\u4e2aLNA\u5e94\u5177\u5907\u5c3d\u53ef\u80fd\u4f4e\u7684\u566a\u58f0\u7cfb\u6570\u548c\u8db3\u591f\u7684\u589e\u76ca\uff0c\u4ee5\u538b\u5236\u540e\u7eed\u7ec4\u4ef6\uff08\u5982\u6df7\u9891\u5668\u3001\u7535\u7f06\uff09\u5e26\u6765\u7684\u566a\u58f0\u5f71\u54cd\u3002<\/li>\n\n\n\n<li>\u5173\u6ce8LNA\u7684\u589e\u76ca\u4e0e\u7ebf\u6027\u5ea6\uff1aLNA\u9700\u8981\u6709\u8db3\u591f\u7684\u589e\u76ca\u6765\u6291\u5236\u540e\u7eed\u9636\u6bb5\u7684\u566a\u58f0\uff0c\u4f46\u8fc7\u9ad8\u7684\u589e\u76ca\u53ef\u80fd\u4f1a\u5f71\u54cd\u7cfb\u7edf\u7684\u7ebf\u6027\u5ea6\uff0c\u5bfc\u81f4\u5904\u7406\u5f3a\u4fe1\u53f7\u65f6\u4ea7\u751f\u5931\u771f\u3002\u9700\u8981\u5728\u4f4e\u566a\u58f0\u7cfb\u6570\u3001\u9ad8\u589e\u76ca\u548c\u826f\u597d\u7684\u7ebf\u6027\u5ea6\u4e4b\u95f4\u53d6\u5f97\u5e73\u8861\u3002<\/li>\n\n\n\n<li>\u6700\u5c0f\u5316\u524d\u7aef\u635f\u8017\uff1aLNA\u4e4b\u524d\u7684\u6240\u6709\u8fde\u63a5\u5668\u3001\u7535\u7f06\u7b49\u7684\u635f\u8017\u4f1a\u76f4\u63a5\u52a0\u5728\u7cfb\u7edf\u566a\u58f0\u7cfb\u6570\u4e0a\u3002\u4f8b\u5982\uff0c1 dB\u7684\u635f\u8017\u4f1a\u4f7f\u7cfb\u7edf\u566a\u58f0\u7cfb\u6570\u81f3\u5c11\u589e\u52a01 dB\u3002\u56e0\u6b64\uff0c\u5e94\u4f7f\u7528\u9ad8\u8d28\u91cf\u7684\u4f4e\u635f\u8017\u7535\u7f06\u548c\u8fde\u63a5\u5668\uff0c\u5e76\u5c3d\u91cf\u7f29\u77ed\u5929\u7ebf\u5230LNA\u7684\u8ddd\u79bb\u3002<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">\u8865\u5145:\u5f17\u91cc\u65af\u4f20\u8f93\u516c\u5f0f\uff08Friis\u516c\u5f0f\uff09<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">\u4ec0\u4e48\u662f\u5f17\u91cc\u65af\u516c\u5f0f\uff1f<\/h4>\n\n\n\n<p>\u5f17\u91cc\u65af\u4f20\u8f93\u516c\u5f0f\u63cf\u8ff0\u7684\u662f\u5728\u81ea\u7531\u7a7a\u95f4\uff08\u7406\u60f3\u3001\u65e0\u906e\u6321\u3001\u65e0\u591a\u5f84\u53cd\u5c04\u7684\u73af\u5883\uff09\u4e2d\uff0c\u65e0\u7ebf\u7535\u6ce2\u4ece\u53d1\u5c04\u5929\u7ebf\u5230\u63a5\u6536\u5929\u7ebf\u6240\u7ecf\u5386\u7684\u4fe1\u53f7\u5f3a\u5ea6\u8870\u51cf\uff0c\u5373\u8def\u5f84\u635f\u8017\u3002\u7b80\u5355\u6765\u8bf4\uff0c\u5b83\u56de\u7b54\u4e86\u8fd9\u6837\u4e00\u4e2a\u95ee\u9898\uff1a\u201c\u5f53\u6211\u628a\u53d1\u5c04\u529f\u7387\u4ece1\u74e6\u589e\u52a0\u523010\u74e6\uff0c\u6216\u8005\u628a\u901a\u4fe1\u8ddd\u79bb\u4ece1\u516c\u91cc\u589e\u52a0\u523010\u516c\u91cc\u65f6\uff0c\u63a5\u6536\u7aef\u6536\u5230\u7684\u4fe1\u53f7\u529f\u7387\u4f1a\u5982\u4f55\u53d8\u5316\uff1f\u201d<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u5f17\u91cc\u65af\u516c\u5f0f\u7684\u6807\u51c6\u5f62\u5f0f\uff08\u529f\u7387\u5f62\u5f0f\uff09<\/h4>\n\n\n\n<p>\u6700\u5e38\u7528\u7684\u5f62\u5f0f\u662f\u529f\u7387\u5f62\u5f0f:<strong><em>P<sub>r<\/sub>\/<strong><em>P<sub>t<\/sub><\/em><\/strong>=G<sub>t<\/sub>G<sub>r<\/sub>\u03bb<sup>2<\/sup>\/\uff084\u03c0R\uff09<sup>2<\/sup><\/em><\/strong><\/p>\n\n\n\n<p>\u5176\u4e2d\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><em>P<sub>r<\/sub><\/em><\/strong>\uff1a\u63a5\u6536\u529f\u7387<\/li>\n\n\n\n<li><strong><em>P<sub>t<\/sub><\/em><\/strong>\uff1a\u53d1\u5c04\u529f\u7387<\/li>\n\n\n\n<li><strong><em>G<sub>t<\/sub><\/em><\/strong>\uff1a\u53d1\u5c04\u5929\u7ebf\u7684\u589e\u76ca<\/li>\n\n\n\n<li><strong><em>G<sub>r<\/sub><\/em><\/strong>\uff1a\u63a5\u6536\u5929\u7ebf\u7684\u589e\u76ca<\/li>\n\n\n\n<li>\u03bb\uff1a\u65e0\u7ebf\u7535\u6ce2\u7684\u6ce2\u957f<\/li>\n\n\n\n<li><strong><em>R<\/em><\/strong>\uff1a\u53d1\u5c04\u5929\u7ebf\u4e0e\u63a5\u6536\u5929\u7ebf\u4e4b\u95f4\u7684\u8ddd\u79bb<\/li>\n\n\n\n<li>\u03c0\uff1a\u5706\u5468\u7387<\/li>\n<\/ul>\n\n\n\n<p>\u516c\u5f0f\u7684\u7269\u7406\u610f\u4e49\uff1a\u6bd4\u503c&#8221;<strong><em>P<sub>r<\/sub>\/<strong><em>P<sub>t<\/sub><\/em><\/strong><\/em><\/strong>&#8221; \u8868\u793a\u63a5\u6536\u529f\u7387\u5360\u53d1\u5c04\u529f\u7387\u7684\u6bd4\u4f8b\u3002\u8fd9\u4e2a\u6bd4\u4f8b\u4e0e\u5929\u7ebf\u589e\u76ca&#8221;<strong><em>G<sub>t<\/sub><\/em><\/strong>&#8221; \u548c&#8221;<strong><em>G<sub>r<\/sub><\/em><\/strong>&#8221; \u6210\u6b63\u6bd4\uff0c\u4f46\u4e0e\u8ddd\u79bb&#8221;R&#8221; \u7684\u5e73\u65b9\u6210\u53cd\u6bd4\uff0c\u4e0e\u6ce2\u957f&#8221;\u03bb&#8221; \u7684\u5e73\u65b9\u4e5f\u6210\u53cd\u6bd4\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u5f17\u91cc\u65af\u516c\u5f0f\u7684\u5bf9\u6570\u5f62\u5f0f<\/h4>\n\n\n\n<p>\u5728\u5b9e\u9645\u5de5\u7a0b\u4e2d\uff0c\u6211\u4eec\u66f4\u4e60\u60ef\u4e8e\u4f7f\u7528\u5206\u8d1d\u6765\u8868\u793a\u529f\u7387\u548c\u589e\u76ca\uff0c\u56e0\u4e3a\u4e58\u9664\u5173\u7cfb\u53ef\u4ee5\u8f6c\u6362\u4e3a\u52a0\u51cf\u8fd0\u7b97\uff0c\u66f4\u52a0\u65b9\u4fbf\u3002\u5c06\u5bf9\u6570\u5f62\u5f0f\u7684\u5f17\u91cc\u65af\u516c\u5f0f\u5c55\u5f00\u540e\uff0c\u6211\u4eec\u5f97\u5230\uff1a<em><strong>P<sub>r<\/sub>=P<sub>t<\/sub>+D<sub>t<\/sub>+D<sub>r<\/sub>+20log10(\u03bb\/4\u03c0R)<\/strong><\/em><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u8865\u5145:\u63a5\u6536\u5668\u7075\u654f\u5ea6 S<sub>min<\/sub>\u7684\u7406\u8bba\u516c\u5f0f<\/h3>\n\n\n\n<p><strong>\u4ec0\u4e48\u662f\u63a5\u6536\u5668\u7075\u654f\u5ea6\uff1f<\/strong>\u63a5\u6536\u5668\u7075\u654f\u5ea6 \u662f\u6307\u63a5\u6536\u673a\u80fd\u591f\u6b63\u786e\u89e3\u8c03\u5e76\u6062\u590d\u51fa\u539f\u59cb\u4fe1\u53f7\u65f6\uff0c\u6240\u9700\u7684\u6700\u5c0f\u5e73\u5747\u63a5\u6536\u529f\u7387\u3002\u901a\u5e38\u7528\u4e00\u4e2a\u8d1f\u7684dBm\u503c\u8868\u793a\uff08\u4f8b\u5982 -100 dBm\uff09\uff0c\u8fd9\u4e2a\u503c\u8d8a\u5c0f\uff08\u8d8a\u8d1f\uff09\uff0c\u8bf4\u660e\u63a5\u6536\u673a\u7684\u7075\u654f\u5ea6\u8d8a\u9ad8\uff0c\u6027\u80fd\u8d8a\u597d\uff0c\u56e0\u4e3a\u5b83\u80fd\u6355\u83b7\u66f4\u5fae\u5f31\u7684\u4fe1\u53f7\u3002<\/p>\n\n\n\n<p><strong>\u7075\u654f\u5ea6\u7406\u8bba\u516c\u5f0f\u7684\u6838\u5fc3\u601d\u60f3<\/strong>,\u7075\u654f\u5ea6\u7684\u7406\u8bba\u57fa\u7840\u662f\u4fe1\u566a\u6bd4\u3002\u63a5\u6536\u673a\u8981\u6210\u529f\u89e3\u8c03\u4e00\u4e2a\u4fe1\u53f7\uff0c\u63a5\u6536\u5230\u7684\u4fe1\u53f7\u529f\u7387\u5fc5\u987b\u5927\u4e8e\u7b49\u4e8e\u566a\u58f0\u529f\u7387\u7684\u4e00\u5b9a\u500d\u6570\u3002\u8fd9\u4e2a\u500d\u6570\u5c31\u662f\u6240\u9700\u7684\u6700\u5c0f\u4fe1\u566a\u6bd4\u3002\u56e0\u6b64\uff0c\u7075\u654f\u5ea6\u7684\u7406\u8bba\u516c\u5f0f\u53ef\u4ee5\u8868\u793a\u4e3a\uff1a<strong><em>\u63a5\u6536\u5668\u7075\u654f\u5ea6 (S<sub>min<\/sub>) = \u5e73\u5747\u566a\u58f0\u529f\u7387 (P<sub>n<\/sub>) + \u6240\u9700\u4fe1\u566a\u6bd4 (SNR<sub>min<\/sub>)<\/em><\/strong>,\u8fd9\u4e2a\u516c\u5f0f\u7684\u542b\u4e49\u662f\uff1a\u5f53\u63a5\u6536\u5230\u7684\u4fe1\u53f7\u529f\u7387 <em><strong>P<\/strong><sub><strong>r<\/strong><\/sub><\/em>\u521a\u597d\u7b49\u4e8e\u7cfb\u7edf\u7684\u603b\u566a\u58f0\u529f\u7387 <strong><em>P<sub>n<\/sub><\/em><\/strong>\u4e0e\u89e3\u8c03\u6240\u9700\u4fe1\u566a\u6bd4 <strong><em>SNR<sub>min<\/sub><\/em><\/strong> \u4e4b\u548c\u65f6\uff0c\u6b64\u65f6\u7684 <em><strong>P<\/strong><sub><strong>r<\/strong><\/sub><\/em> \u5c31\u662f\u7075\u654f\u5ea6 <strong><em>S<sub>min<\/sub><\/em><\/strong><\/p>\n\n\n\n<p><strong>\u7406\u8bba\u516c\u5f0f\u7684\u8be6\u7ec6\u63a8\u5bfc\u4e0e\u5c55\u5f00<\/strong>:\u6211\u4eec\u5c06\u4e0a\u8ff0\u6838\u5fc3\u601d\u60f3\u5c55\u5f00\uff0c\u5f97\u5230\u5de5\u7a0b\u4e0a\u6700\u5b9e\u7528\u7684\u5f62\u5f0f\uff1a<strong><em>S<sub>min<\/sub> = 10log<sub>10<\/sub>(k T_0) + 10log<sub>10<\/sub>(B) + NF + SNR<sub>mi<\/sub><\/em><\/strong><sub>n<\/sub>,\u8ba9\u6211\u4eec\u6765\u9010\u4e00\u5206\u89e3\u8fd9\u4e2a\u516c\u5f0f\u7684\u5404\u4e2a\u90e8\u5206\uff1a<\/p>\n\n\n\n<p><strong><em>\u70ed\u566a\u58f0\u529f\u7387\uff1a P<sub>n<\/sub> = kT<sub>0<\/sub>B<\/em><\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>k\uff1a\u73bb\u5c14\u5179\u66fc\u5e38\u6570\uff0c 1.380649&#215;10^-23J\/K<\/li>\n\n\n\n<li><sub>T0<\/sub>\uff1a\u6807\u51c6\u566a\u58f0\u6e29\u5ea6\uff0c\u901a\u5e38\u53d6 290 K\uff08\u7ea617\u00b0C\uff09<\/li>\n\n\n\n<li>B\uff1a\u63a5\u6536\u7cfb\u7edf\u7684\u7b49\u6548\u566a\u58f0\u5e26\u5bbd<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><\/li>\n<\/ol>\n\n\n\n<p>\u8ba1\u7b97\u5e38\u6570\u9879\uff1a<strong><em>10log10(kT<sub>0<\/sub>) = 10log<sub>10<\/sub>(1.38&#215;10^-23&#215;290)=-204 dBW\/H<\/em><\/strong><em><strong>z<\/strong><\/em>,\u7531\u4e8e<em><strong> 1 dBW = 30 dBm<\/strong><\/em>\uff0c\u6240\u4ee5\uff1a<em><strong>10log10(kT<sub>0<\/sub>)=-204dBW\/Hz+ 30 dBm\/dBW= -174Bm\/Hz<\/strong><\/em>,<\/p>\n\n\n\n<p>\u7ed3\u8bba\uff1a \u5728\u5ba4\u6e29290K\u4e0b\uff0c\u4efb\u4f55\u63a5\u6536\u673a\u57281Hz\u5e26\u5bbd\u5185\u6536\u5230\u7684\u70ed\u566a\u58f0\u529f\u7387\u5e95\u662f -174 dBm\u3002\u8fd9\u662f\u7269\u7406\u5b66\u8bbe\u5b9a\u7684\u7406\u8bba\u6781\u9650\u3002<\/p>\n\n\n\n<p><strong><em>\u7cfb\u7edf\u603b\u566a\u58f0\u529f\u7387\uff1a P<sub>n <\/sub>= kT<sub>0<\/sub>B + NF<\/em><\/strong><\/p>\n\n\n\n<p>\u63a5\u6536\u673a\u81ea\u8eab\u7684\u5143\u5668\u4ef6\uff08\u5982\u653e\u5927\u5668\u3001\u6df7\u9891\u5668\u7b49\uff09\u4e5f\u4f1a\u4ea7\u751f\u566a\u58f0\uff0c\u6211\u4eec\u7528\u566a\u58f0\u7cfb\u6570 \u6765\u63cf\u8ff0\u8fd9\u79cd\u6027\u80fd\u7684\u6076\u5316,NF\uff1a\u63a5\u6536\u673a\u7684\u566a\u58f0\u7cfb\u6570\uff0c\u5355\u4f4d\u662f dB\u3002\u5b83\u8868\u793a\u4fe1\u53f7\u901a\u8fc7\u63a5\u6536\u673a\u540e\uff0c\u4fe1\u566a\u6bd4\u6076\u5316\u7684\u7a0b\u5ea6\u3002\u4e00\u4e2a\u7406\u60f3\u7684\u63a5\u6536\u673a\uff0cNF = 0 dB\u3002\u56e0\u6b64\uff0c\u8ba1\u5165\u63a5\u6536\u673a\u81ea\u8eab\u566a\u58f0\u540e\uff0c\u7cfb\u7edf\u603b\u7684\u566a\u58f0\u529f\u7387\u4e3a\uff1a<strong><em>P<sub>n<\/sub>(dBm)= 10log<sub>10<\/sub>(kT<sub>0<\/sub>)+ NF = (-174dBm\/Hz+ 10log10(B)) + NF<\/em><\/strong><\/p>\n\n\n\n<p><strong><em>\u6240\u9700\u4fe1\u566a\u6bd4\uff1aSNR<sub>min<\/sub><\/em><\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>SNR<sub>min<\/sub>\uff1a\u5728\u7ed9\u5b9a\u7684\u8bef\u7801\u7387\u8981\u6c42\u4e0b\uff08\u5982 BER = 10^-6 \uff09\uff0c\u89e3\u8c03\u5668\u80fd\u591f\u6b63\u5e38\u5de5\u4f5c\u6240\u9700\u7684\u6700\u5c0f\u4fe1\u566a\u6bd4\uff0c\u5355\u4f4d\u662f dB\u3002<\/li>\n\n\n\n<li>\u8fd9\u4e2a\u503c\u53d6\u51b3\u4e8e\u8c03\u5236\u65b9\u5f0f\u548c\u7f16\u7801\u65b9\u6848\u3002<\/li>\n\n\n\n<li>\u7b80\u5355\u7684\u8c03\u5236\u65b9\u5f0f\uff08\u5982 BPSK\uff09\u6297\u566a\u80fd\u529b\u5f3a\uff0cSNR<sub>min<\/sub> \u8981\u6c42\u4f4e\u3002<\/li>\n\n\n\n<li>\u590d\u6742\u7684\u8c03\u5236\u65b9\u5f0f\uff08\u5982 64-QAM\uff09\u9891\u8c31\u6548\u7387\u9ad8\uff0c\u4f46 SNR<sub>min<\/sub> \u8981\u6c42\u9ad8\u3002<\/li>\n<\/ul>\n\n\n\n<p><strong>\u516c\u5f0f\u7684\u7269\u7406\u610f\u4e49\u4e0e\u5173\u952e\u70b9<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u57fa\u7840\u566a\u58f0\u5e95\uff1a -174 dBm\/Hz \u662f\u7406\u8bba\u6781\u9650\uff0c\u65e0\u6cd5\u7a81\u7834\u3002<\/li>\n\n\n\n<li>\u5e26\u5bbd\u7684\u4ee3\u4ef7\uff1a \u7cfb\u7edf\u5e26\u5bbd\u8d8a\u5bbd\uff0c\u8fdb\u5165\u7684\u566a\u58f0\u529f\u7387\u8d8a\u5927\uff0c\u7075\u654f\u5ea6\u8d8a\u5dee\uff08\u6570\u503c\u8d8a\u5927\uff09\u3002\u8fd9\u5c31\u662f\u4e3a\u4ec0\u4e48\u7a84\u5e26\u7cfb\u7edf\uff08\u5982NB-IoT, LoRa\uff09\u901a\u5e38\u6709\u6781\u9ad8\u7075\u654f\u5ea6\u7684\u539f\u56e0\u3002<\/li>\n\n\n\n<li>\u63a5\u6536\u673a\u6027\u80fd\uff1a \u566a\u58f0\u7cfb\u6570 NF \u76f4\u63a5\u53cd\u6620\u4e86\u63a5\u6536\u673a\u524d\u7aef\u7535\u8def\u7684\u8bbe\u8ba1\u6c34\u5e73\u3002NF \u8d8a\u4f4e\uff0c\u7075\u654f\u5ea6\u8d8a\u9ad8\u3002<\/li>\n\n\n\n<li>\u8c03\u5236\u4e0e\u7f16\u7801\u7684\u6743\u8861\uff1a SNR_min \u4f53\u73b0\u4e86\u7cfb\u7edf\u5bf9\u4fe1\u53f7\u8d28\u91cf\u7684\u8981\u6c42\u3002\u9ad8\u6548\u7684\u8c03\u5236\u7f16\u7801\u9700\u8981\u66f4\u9ad8\u7684SNR\uff0c\u8fd9\u4f1a\u727a\u7272\u7075\u654f\u5ea6\uff1b\u800c\u4e3a\u4e86\u83b7\u5f97\u9ad8\u7075\u654f\u5ea6\uff0c\u53ef\u80fd\u9700\u8981\u4f7f\u7528\u6297\u566a\u80fd\u529b\u5f3a\u4f46\u9891\u8c31\u6548\u7387\u4f4e\u7684\u8c03\u5236\u65b9\u5f0f\u3002<\/li>\n<\/ol>\n\n\n\n<p><strong>\u603b\u7ed3:<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u53c2\u6570<\/th><th>\u7b26\u53f7<\/th><th>\u5355\u4f4d<\/th><th>\u5f71\u54cd<\/th><\/tr><\/thead><tbody><tr><td>\u70ed\u566a\u58f0\u5e95<\/td><td>kT<sub>0<\/sub><\/td><td>dBm\/Hz<\/td><td>\u7269\u7406\u6781\u9650\uff0c\u56fa\u5b9a\u4e3a -174 dBm\/Hz<\/td><\/tr><tr><td>\u7cfb\u7edf\u5e26\u5bbd<\/td><td>B<\/td><td>Hz<\/td><td>\u5e26\u5bbd\u8d8a\u5bbd\uff0c\u7075\u654f\u5ea6\u8d8a\u5dee<\/td><\/tr><tr><td>\u566a\u58f0\u7cfb\u6570<\/td><td>NF<\/td><td>dB<\/td><td>\u53cd\u6620\u63a5\u6536\u673a\u786c\u4ef6\u6027\u80fd\uff0c\u503c\u8d8a\u4f4e\u8d8a\u597d<\/td><\/tr><tr><td>\u6240\u9700\u4fe1\u566a\u6bd4<\/td><td>SNR<sub>min<\/sub><\/td><td>dB<\/td><td>\u53d6\u51b3\u4e8e\u8c03\u5236\u7f16\u7801\u65b9\u5f0f\u548c\u8bef\u7801\u7387\u8981\u6c42<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5f17\u91cc\u65af\u516c\u5f0f\uff1a\u8ba1\u7b97\u7684\u662f\u201c\u4fe1\u9053\u4e0a\u8fd8\u6709\u591a\u5c11\u4fe1\u53f7\u529f\u7387\u53ef\u7528\uff1f\u201d\uff08\u5c31\u50cf\u8ba1\u7b97\u4f60\u94f6\u884c\u8d26\u6237\u7684\u652f\u51fa\uff09<\/li>\n\n\n\n<li>\u7075\u654f\u5ea6\u516c\u5f0f\uff1a\u5b9a\u4e49\u7684\u662f\u201c\u63a5\u6536\u673a\u6210\u529f\u89e3\u7801\u81f3\u5c11\u9700\u8981\u591a\u5c11\u4fe1\u53f7\u529f\u7387\uff1f\u201d\uff08\u5c31\u50cf\u5b9a\u4e49\u4f60\u7ef4\u6301\u751f\u6d3b\u7684\u6700\u4f4e\u6536\u5165\uff09<\/li>\n<\/ul>\n\n\n\n<p>\u7531\u5f17\u91cc\u65af\u516c\u5f0f\u8ba1\u7b97\u51fa\u7684\u63a5\u6536\u529f\u7387 P<sub>r<\/sub>\u2265 \u63a5\u6536\u5668\u7075\u654f\u5ea6 S<sub>min<\/sub><\/p>\n\n\n\n<p>\u5c06\u4e24\u4e2a\u516c\u5f0f\u7ed3\u5408\u8d77\u6765\uff0c\u5c31\u5b8c\u6210\u4e86\u5b8c\u6574\u7684\u94fe\u8def\u9884\u7b97\u5206\u6790:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u5199\u51fa\u5f17\u91cc\u65af\u516c\u5f0f\uff1a<strong><em> P<sub>r <\/sub>= P<sub>t<\/sub> + G<sub>t <\/sub>+ G<sub>r<\/sub> &#8211; L<sub>p<\/sub> <\/em><\/strong>\uff08\u4e3a\u7b80\u6d01\uff0c\u5168\u90e8\u4f7f\u7528dB\/dBm\u5355\u4f4d\uff09<\/li>\n\n\n\n<li>\u5199\u51fa\u7075\u654f\u5ea6\u516c\u5f0f\uff1a <strong><em>S<sub>min<\/sub>= -174dBm\/Hz+ 10log<sub>10<\/sub>(B) + NF + SNR<sub>min<\/sub><\/em><\/strong><\/li>\n\n\n\n<li>\u5efa\u7acb\u8fde\u63a5\uff1a\u7cfb\u7edf\u8981\u80fd\u6b63\u5e38\u5de5\u4f5c\uff0c\u5fc5\u987b\u6ee1\u8db3\uff1a <strong><em>P<sub>r <\/sub><\/em><\/strong> &gt; <strong><em>S<sub>min<\/sub><\/em><\/strong> \u5c06\u4e0a\u9762\u4e24\u4e2a\u516c\u5f0f\u4ee3\u5165\u8fd9\u4e2a\u4e0d\u7b49\u5f0f\uff1a <strong><em>P<sub>r <\/sub>= P<sub>t<\/sub> + G<sub>t <\/sub>+ G<sub>r<\/sub> &#8211; L<sub>p<\/sub> <\/em><\/strong> \\<strong><em>-174dBm\/Hz+ 10log<sub>10<\/sub>(B) + NF + SNR<sub>min<\/sub><\/em><\/strong><\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">\u63a5\u6536\u673a\u7684\u9759\u566a\u7075\u654f\u5ea6\uff08MC1-0880\uff09<\/h2>\n\n\n\n<p>\u63a5\u6536\u673a\u7684\u9759\u566a\u7075\u654f\u5ea6 \u6307\u7684\u662f\uff0c\u5728\u5f00\u542f\u9759\u566a\u529f\u80fd\u7684\u524d\u63d0\u4e0b\uff0c\u63a5\u6536\u673a\u80fd\u591f\u6253\u5f00\u97f3\u9891\u8f93\u51fa\u3001\u8ba9\u4f60\u542c\u5230\u58f0\u97f3\u65f6\uff0c\u5176\u8f93\u5165\u7aef\u6240\u9700\u7684\u6700\u5c0f\u5c04\u9891\u4fe1\u53f7\u5f3a\u5ea6\u3002\u7b80\u5355\u6765\u8bf4\uff0c\u5b83\u5c31\u662f \u201c\u80fd\u8ba9\u63a5\u6536\u673a\u5f00\u59cb\u51fa\u58f0\u7684\u90a3\u4e2a\u6700\u5f31\u7684\u4fe1\u53f7\u5f3a\u5ea6\u201d.\u4e86\u66f4\u597d\u5730\u7406\u89e3\uff0c\u6211\u4eec\u9700\u8981\u628a\u5b83\u62c6\u6210\u4e24\u4e2a\u90e8\u5206\uff1a\u201c\u7075\u654f\u5ea6\u201d\u548c\u201c\u9759\u566a\u201d\u3002<\/p>\n\n\n\n<p>\u4ec0\u4e48\u662f\u201c\u7075\u654f\u5ea6\u201d\uff1f\u666e\u901a\u7075\u654f\u5ea6\uff1a\u6307\u5728\u6ca1\u6709\u5f00\u542f\u9759\u566a\u529f\u80fd\u65f6\uff0c\u63a5\u6536\u673a\u80fd\u591f\u8f93\u51fa\u4e00\u4e2a\u53ef\u7528\u7684\u3001\u4fe1\u566a\u6bd4\u6ee1\u8db3\u8981\u6c42\u7684\u97f3\u9891\u4fe1\u53f7\u65f6\uff0c\u6240\u9700\u7684\u6700\u5c0f\u8f93\u5165\u4fe1\u53f7\u5f3a\u5ea6\u3002\u5173\u952e\u70b9\uff1a\u63a5\u6536\u673a\u975e\u5e38\u7075\u654f\uff0c\u5373\u4f7f\u6ca1\u6709\u4fe1\u53f7\uff0c\u5b83\u4e5f\u4f1a\u653e\u5927\u80cc\u666f\u566a\u58f0\uff08\u4f60\u542c\u5230\u7684\u201c\u5636\u5636\u201d\u58f0\uff09\u3002\u6240\u4ee5\uff0c\u5982\u679c\u4e00\u76f4\u5f00\u7740\u626c\u58f0\u5668\uff0c\u4f60\u4f1a\u88ab\u6301\u7eed\u7684\u80cc\u666f\u566a\u97f3\u5435\u5f97\u5fc3\u70e6\u610f\u4e71\u3002<\/p>\n\n\n\n<p>\u4ec0\u4e48\u662f\u201c\u9759\u566a\u201d\uff1f\u9759\u566a \u662f\u4e00\u4e2a\u7535\u8def\u529f\u80fd\uff0c\u5176\u4f5c\u7528\u5c31\u50cf\u7ed9\u626c\u58f0\u5668\u52a0\u4e86\u4e00\u4e2a \u201c\u81ea\u52a8\u9759\u97f3\u5f00\u5173\u201d \u3002\u5b83\u7684\u5de5\u4f5c\u539f\u7406\u662f\uff1a\u68c0\u6d4b\u63a5\u6536\u5230\u7684\u4fe1\u53f7\u5f3a\u5ea6\u3002\u5f53\u6ca1\u6709\u8db3\u591f\u5f3a\u7684\u6709\u7528\u4fe1\u53f7\u65f6\uff08\u53ea\u6709\u80cc\u666f\u566a\u97f3\uff09\uff0c\u5b83\u5c31\u5173\u95ed\u97f3\u9891\u8f93\u51fa\u901a\u9053\uff0c\u8ba9\u4f60\u542c\u4e0d\u5230\u4efb\u4f55\u58f0\u97f3\uff0c\u4fdd\u6301\u5b89\u9759\u3002\u5f53\u6709\u4e00\u4e2a\u8db3\u591f\u5f3a\u7684\u4fe1\u53f7\u5230\u6765\u65f6\uff0c\u5b83\u5c31\u6253\u5f00\u97f3\u9891\u901a\u9053\uff0c\u8ba9\u4f60\u80fd\u542c\u5230\u8fd9\u4e2a\u4fe1\u53f7\u7684\u5185\u5bb9\u3002\u8fd9\u4e2a\u201c\u8db3\u591f\u5f3a\u201d\u7684\u95e8\u69db\uff0c\u5c31\u662f\u7531\u9759\u566a\u9608\u503c\u6765\u8bbe\u5b9a\u7684\u3002\u7528\u6237\u53ef\u4ee5\u901a\u8fc7\u65cb\u94ae\uff08\u5728\u5bf9\u8bb2\u673a\u6216\u7535\u53f0\u8bbe\u5907\u4e0a\u5e38\u6807\u4e3a\u201cSQL\u201d\u6216\u201cSQUELCH\u201d\uff09\u6765\u8c03\u8282\u8fd9\u4e2a\u95e8\u69db\u7684\u9ad8\u4f4e\u3002<\/p>\n\n\n\n<p>\u7ed3\u5408\u8d77\u6765\u7406\u89e3\u201c\u9759\u566a\u7075\u654f\u5ea6\u201d\u73b0\u5728\u6211\u4eec\u628a\u8fd9\u4e24\u4e2a\u6982\u5ff5\u7ed3\u5408\u8d77\u6765\uff1a\u9759\u566a\u7075\u654f\u5ea6 \u63cf\u8ff0\u7684\u5c31\u662f\u8fd9\u4e2a\u201c\u81ea\u52a8\u9759\u97f3\u5f00\u5173\u201d\u5728\u4ec0\u4e48\u70b9\u4e0a\u4f1a\u88ab\u89e6\u53d1\u6253\u5f00\u3002\u5b83\u6d4b\u91cf\u7684\u662f\uff0c\u5f53\u9759\u566a\u7535\u8def\u521a\u521a\u597d\u8981\u6253\u5f00\u97f3\u9891\u901a\u9053\u3001\u4f46\u8fd8\u6ca1\u6709\u5b8c\u5168\u6253\u5f00\u7684\u90a3\u4e2a\u4e34\u754c\u70b9\u7684\u4fe1\u53f7\u5f3a\u5ea6\u3002\u5728\u4e13\u4e1a\u6d4b\u8bd5\u4e2d\uff0c\u901a\u5e38\u5b9a\u4e49\u4e3a \u201c\u9759\u566a\u5f00\u542f\u7075\u654f\u5ea6\u201d \uff0c\u5373\u9759\u566a\u95e8\u9650\u88ab\u6253\u5f00\uff0c\u63a5\u6536\u673a\u97f3\u9891\u8f93\u51fa\u529f\u7387\u8fbe\u5230\u4e00\u4e2a\u6807\u51c6\u503c\uff08\u6bd4\u598250mW\uff09\u65f6\uff0c\u5929\u7ebf\u8f93\u5165\u7aef\u6240\u9700\u7684\u5c04\u9891\u4fe1\u53f7\u7535\u5e73\u3002<\/p>\n\n\n\n<p>\u4e00\u4e2a\u751f\u52a8\u7684\u6bd4\u55bb\uff1a\u628a\u63a5\u6536\u673a\u60f3\u8c61\u6210\u4e00\u4e2a\u5e26\u6709\u81ea\u52a8\u95e8\u7684\u623f\u95f4\uff0c\u4f60\u5f85\u5728\u623f\u95f4\u91cc\u3002\u80cc\u666f\u566a\u97f3\u5c31\u50cf\u623f\u95f4\u5916\u7684\u9a6c\u8def\u566a\u97f3\u3002\u6709\u7528\u7684\u4fe1\u53f7\u5c31\u50cf\u4f60\u7684\u670b\u53cb\u5728\u95e8\u5916\u53eb\u4f60\u3002\u9759\u566a\u529f\u80fd\u5c31\u662f\u4e00\u4e2a\u667a\u80fd\u95e8\u536b\uff0c\u4ed6\u53ea\u542c\u4f60\u7684\u670b\u53cb\u7684\u58f0\u97f3\u3002\u9759\u566a\u7075\u654f\u5ea6\u5c31\u662f\u8fd9\u4e2a\u95e8\u536b\u7684\u201c\u542c\u529b\u9608\u503c\u201d\u3002\u5982\u679c\u7075\u654f\u5ea6\u9ad8\uff08\u9759\u566a\u9608\u503c\u8bbe\u5f97\u4f4e\uff09\uff0c\u610f\u5473\u7740\u95e8\u536b\u8033\u6735\u5f88\u7075\uff0c\u4f60\u7684\u670b\u53cb\u7528\u5f88\u5c0f\u7684\u58f0\u97f3\uff08\u5f31\u4fe1\u53f7\uff09\u53eb\u4ed6\uff0c\u4ed6\u5c31\u628a\u95e8\u6253\u5f00\u8ba9\u4f60\u542c\u5230\u3002\u5982\u679c\u7075\u654f\u5ea6\u4f4e\uff08\u9759\u566a\u9608\u503c\u8bbe\u5f97\u9ad8\uff09\uff0c\u610f\u5473\u7740\u95e8\u536b\u53cd\u5e94\u8fdf\u949d\uff0c\u53ea\u6709\u4f60\u7684\u670b\u53cb\u5927\u58f0\u558a\u53eb\uff08\u5f3a\u4fe1\u53f7\uff09\uff0c\u4ed6\u624d\u4f1a\u5f00\u95e8\u3002<\/p>\n\n\n\n<p>\u6280\u672f\u6307\u6807\u4e0e\u5355\u4f4d\uff1a\u5355\u4f4d\uff1a\u9759\u566a\u7075\u654f\u5ea6\u901a\u5e38\u7528\u5fae\u4f0f \u6216 \u5206\u8d1d\u6beb\u74e6 \u6765\u8868\u793a\u3002\u6570\u503c\u8d8a\u5c0f\uff0c\u8bf4\u660e\u63a5\u6536\u673a\u7684\u6027\u80fd\u8d8a\u597d\u3002\u4f8b\u5982\uff1a0.15 \u00b5V \u6216 -121 dBm\u3002\u8fd9\u4e2a\u503c\u6bd4 0.25 \u00b5V \u6216 -117 dBm \u8981\u597d\uff0c\u56e0\u4e3a\u5b83\u80fd\u5728\u66f4\u5f31\u7684\u4fe1\u53f7\u4e0b\u542f\u52a8\u3002\u4e3a\u4ec0\u4e48\u9759\u566a\u7075\u654f\u5ea6\u5f88\u91cd\u8981\uff1f\u6700\u5927\u5316\u901a\u4fe1\u8ddd\u79bb\uff1a\u4e00\u4e2a\u4f18\u826f\u7684\u9759\u566a\u7075\u654f\u5ea6\u610f\u5473\u7740\u4f60\u7684\u8bbe\u5907\u80fd\u6355\u6349\u5230\u66f4\u8fdc\u3001\u66f4\u5fae\u5f31\u7684\u4fe1\u53f7\uff0c\u4ece\u800c\u5ef6\u957f\u4e86\u6709\u6548\u7684\u901a\u4fe1\u8303\u56f4\u3002\u7528\u6237\u4f53\u9a8c\uff1a\u6b63\u786e\u5730\u8bbe\u7f6e\u9759\u566a\u9608\u503c\uff0c\u53ef\u4ee5\u8ba9\u4f60\u5728\u5b89\u9759\u7684\u5f85\u673a\u72b6\u6001\u548c\u53ef\u9760\u7684\u4fe1\u53f7\u63a5\u6536\u4e4b\u95f4\u53d6\u5f97\u5b8c\u7f8e\u5e73\u8861\u3002\u8bbe\u7f6e\u8fc7\u9ad8\u53ef\u80fd\u4f1a\u9519\u8fc7\u5fae\u5f31\u4f46\u91cd\u8981\u7684\u4fe1\u53f7\uff1b\u8bbe\u7f6e\u8fc7\u4f4e\u5219\u4f1a\u5bfc\u81f4\u80cc\u666f\u566a\u97f3\u9891\u7e41\u6253\u65ad\u5b89\u9759\uff08\u5373\u9759\u566a\u65e0\u6cd5\u5b8c\u5168\u5173\u95ed\uff09\u3002<\/p>\n\n\n\n<p>\u603b\u7ed3\uff1a\u63a5\u6536\u673a\u7684\u9759\u566a\u7075\u654f\u5ea6\uff0c\u672c\u8d28\u4e0a\u662f\u4e00\u4e2a\u201c\u6027\u80fd-\u53ef\u7528\u6027\u201d\u7684\u7efc\u5408\u6307\u6807\u3002\u5b83\u544a\u8bc9\u4f60\u8fd9\u53f0\u63a5\u6536\u673a\u5728\u4fdd\u6301\u80cc\u666f\u566a\u97f3\u5b89\u9759\u7684\u540c\u65f6\uff0c\u7a76\u7adf\u80fd\u201c\u542c\u5230\u201d\u591a\u8fdc\u7684\u5fae\u5f31\u4fe1\u53f7\u3002\u5b83\u662f\u8861\u91cf\u63a5\u6536\u673a\u6027\u80fd\u7684\u4e00\u4e2a\u975e\u5e38\u5b9e\u9645\u548c\u5173\u952e\u7684\u53c2\u6570\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u7cfb\u7edf\u566a\u58f0\u7cfb\u6570\u7684\u4f18\u5316<\/h2>\n\n\n\n<p>\u63a5\u6536\u5fae\u5f31\u4fe1\u53f7\u7684\u5173\u952e\uff0c\u4e0d\u662f\u628a\u4fe1\u53f7\u653e\u5927\u5230\u591a\u5f3a\uff0c\u800c\u662f\u5728\u653e\u5927\u4fe1\u53f7\u7684\u540c\u65f6\uff0c\u5982\u4f55\u6700\u5927\u9650\u5ea6\u5730\u4fdd\u6301\u5e76\u4f18\u5316\u4fe1\u566a\u6bd4\u3002\u524d\u7f6e\u653e\u5927\u5668\uff08LNA\uff09\u672c\u8eab\u4f1a\u5f15\u5165\u566a\u58f0\uff0c\u6211\u4eec\u7528\u4e00\u4e2a\u6307\u6807\u201c\u566a\u58f0\u7cfb\u6570\u201d\u6765\u8861\u91cf\u5b83\u3002\u4e00\u4e2a\u7cfb\u7edf\u7684\u603b\u566a\u58f0\u7cfb\u6570\uff0c\u4e3b\u8981\u7531\u4fe1\u53f7\u94fe\u8def\u4e2d\u6700\u524d\u7aef\u7684\u90e8\u4ef6\u7684\u566a\u58f0\u6027\u80fd\u51b3\u5b9a\u3002\u8fd9\u5c31\u5f15\u51fa\u4e86\u90a3\u4e2a\u9ec4\u91d1\u6cd5\u5219\uff1a\u4e3a\u4e86\u83b7\u5f97\u6700\u4f73\u7684\u7cfb\u7edf\u566a\u58f0\u7cfb\u6570\uff0cLNA\u5e94\u8be5\u88ab\u653e\u7f6e\u5728\u4fe1\u53f7\u6700\u65e9\u9047\u5230\u3001\u4e14\u635f\u8017\u6700\u5c0f\u7684\u4f4d\u7f6e\u3002\u73b0\u5728\uff0c\u6211\u4eec\u6765\u770b\u4e3a\u4ec0\u4e48VF\/UHF\uff08\u542bEME\uff09\u548cHF\u9891\u6bb5\u7684\u5b9e\u8df5\u5982\u6b64\u4e0d\u540c\u3002<\/p>\n\n\n\n<p>\u4e00\u3001 VHF\/UHF\uff08\u542bEME\uff09\u9891\u6bb5\uff1a\u4e3a\u4ec0\u4e48\u5fc5\u987b\u653e\u5728\u5929\u7ebf\u7aef\uff1f<\/p>\n\n\n\n<p>\u60a8\u63d0\u5230\u7684\u6708\u9762\u53cd\u5c04\uff08EME\uff09\u3001\u6d41\u661f\u6563\u5c04\u3001\u536b\u661f\u901a\u4fe1\u7b49\uff0c\u90fd\u5c5e\u4e8e\u5178\u578b\u7684\u5f31\u4fe1\u53f7\u901a\u4fe1\uff0c\u5176\u5de5\u4f5c\u9891\u6bb5\u901a\u5e38\u5728VHF\uff08144 MHz\uff09\u53ca\u4ee5\u4e0a\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u4e3b\u8981\u654c\u4eba\uff1a\u9988\u7ebf\u635f\u8017\n<ul class=\"wp-block-list\">\n<li>\u5728VHF\/UHF\u53ca\u66f4\u9ad8\u9891\u6bb5\uff0c\u540c\u8f74\u7535\u7f06\u7684\u635f\u8017\u53d8\u5f97\u975e\u5e38\u663e\u8457\u3002\u4e00\u683910\u7c73\u957f\u7684\u666e\u901aRG-58\u7535\u7f06\uff0c\u5728430MHz\uff08UHF\uff09\u7684\u635f\u8017\u53ef\u80fd\u9ad8\u8fbe2-3 dB\u3002<\/li>\n\n\n\n<li>\u5173\u952e\u70b9\uff1a\u4efb\u4f55\u5728LNA\u4e4b\u524d\u53d1\u751f\u7684\u4fe1\u53f7\u635f\u8017\uff08\u5982\u7535\u7f06\u635f\u8017\uff09\uff0c\u90fd\u4f1a\u76f4\u63a5\u3001\u6309\u6bd4\u4f8b\u5730\u6076\u5316\u6574\u4e2a\u7cfb\u7edf\u7684\u566a\u58f0\u7cfb\u6570\u3002<\/li>\n\n\n\n<li>\u4e3e\u4f8b\u8bf4\u660e\uff1a\n<ul class=\"wp-block-list\">\n<li>\u5047\u8bbe\u4e00\u4e2a\u6765\u81ea\u6708\u7403\u7684\u6781\u5176\u5fae\u5f31\u7684\u4fe1\u53f7\u5230\u8fbe\u5929\u7ebf\u65f6\uff0c\u5176\u4fe1\u566a\u6bd4\u662f0.1\u5fae\u4f0f\u3002<\/li>\n\n\n\n<li>\u5982\u679c\u5148\u7ecf\u8fc7\u4e00\u6bb5\u67093dB\u635f\u8017\u7684\u7535\u7f06\uff0c\u4fe1\u53f7\u8870\u51cf\u4e00\u534a\uff0c\u53d8\u62100.05\u5fae\u4f0f\uff0c\u4f46\u540c\u65f6\uff0c\u7535\u7f06\u4e5f\u4f1a\u5c06\u5176\u81ea\u8eab\u7684\u70ed\u566a\u58f0\u201c\u6ce8\u5165\u201d\u5230\u4fe1\u53f7\u4e2d\u3002<\/li>\n\n\n\n<li>\u6b64\u65f6\uff0c\u4f60\u518d\u7528\u4e00\u4e2a\u566a\u58f0\u7cfb\u6570\u4e3a1dB\u7684\u4f18\u79c0LNA\u8fdb\u884c\u653e\u5927\uff0c\u4f60\u653e\u5927\u7684\u662f\u4e00\u4e2a\u4fe1\u566a\u6bd4\u5df2\u7ecf\u6076\u5316\u4e863dB\u7684\u4fe1\u53f7\u3002<\/li>\n\n\n\n<li>\u6700\u7ec8\u7cfb\u7edf\u7684\u566a\u58f0\u7cfb\u6570 \u2248 \u7535\u7f06\u635f\u8017 + LNA\u566a\u58f0\u7cfb\u6570 = 3dB + 1dB = 4dB\u3002\u8fd9\u662f\u4e00\u4e2a\u5f88\u5dee\u7684\u7cfb\u7edf\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\u89e3\u51b3\u65b9\u6848\uff1a\u5929\u7ebf\u7aef\u5b89\u88c5LNA\n<ul class=\"wp-block-list\">\n<li>\u5c06\u6781\u4f4e\u566a\u58f0\u7cfb\u6570\u7684LNA\u76f4\u63a5\u5b89\u88c5\u5728\u5929\u7ebf\u9988\u7535\u70b9\u4e4b\u540e\uff0c\u751a\u81f3\u5728\u5854\u9876\u7684\u9632\u6c34\u76d2\u91cc\u3002<\/li>\n\n\n\n<li>\u5de5\u4f5c\u6d41\u7a0b\uff1a \u5fae\u5f31\u4fe1\u53f7 \u2192 \u9996\u5148\u88abLNA\u653e\u5927 \u2192 \u5f3a\u5927\u7684\u3001\u4fe1\u566a\u6bd4\u635f\u5931\u6781\u5c0f\u7684\u4fe1\u53f7 \u2192 \u518d\u901a\u8fc7\u6709\u635f\u8017\u7684\u7535\u7f06\u4f20\u8f93\u5230\u5ba4\u5185\u63a5\u6536\u673a\u3002<\/li>\n\n\n\n<li>\u5728\u8fd9\u4e2a\u8fc7\u7a0b\u4e2d\uff0c\u7535\u7f06\u7684\u635f\u8017\u867d\u7136\u4ecd\u7136\u4f1a\u8870\u51cf\u4fe1\u53f7\uff0c\u4f46\u6b64\u65f6\u4fe1\u53f7\u5df2\u7ecf\u5f88\u5f3a\uff0c\u8870\u51cf\u6389\u4e00\u90e8\u5206\u4e5f\u65e0\u59a8\uff0c\u66f4\u91cd\u8981\u7684\u662f\uff0c\u7535\u7f06\u5f15\u5165\u7684\u70ed\u566a\u58f0\u76f8\u5bf9\u4e8e\u5df2\u7ecf\u88ab\u653e\u5927\u7684\u4fe1\u53f7\u6765\u8bf4\u5df2\u7ecf\u5fae\u4e0d\u8db3\u9053\u4e86\u3002<\/li>\n\n\n\n<li>\u6700\u7ec8\u7cfb\u7edf\u7684\u566a\u58f0\u7cfb\u6570 \u2248 LNA\u7684\u566a\u58f0\u7cfb\u6570\uff08\u4f8b\u59820.5dB\uff09\uff0c\u8fdc\u4f18\u4e8e\u524d\u4e00\u79cd\u65b9\u6848\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<p>\u7ed3\u8bba\uff1a\u5bf9\u4e8eVHF\/UHF\uff0c\u73af\u5883\u5b87\u5b99\u566a\u58f0\u548c\u5927\u6c14\u566a\u58f0\u8f83\u4f4e\uff0c\u7cfb\u7edf\u566a\u58f0\u7684\u4e3b\u8981\u6765\u6e90\u662f\u63a5\u6536\u7cfb\u7edf\u81ea\u8eab\u3002\u56e0\u6b64\uff0c\u5c06LNA\u7f6e\u4e8e\u5929\u7ebf\u7aef\uff0c\u53ef\u4ee5\u514b\u670d\u9988\u7ebf\u635f\u8017\u8fd9\u4e2a\u201c\u5934\u53f7\u654c\u4eba\u201d\uff0c\u5b9e\u73b0\u6700\u4f73\u4fe1\u566a\u6bd4\u3002<\/p>\n\n\n\n<p>\u4e8c\u3001 HF\u9891\u6bb5\uff08\u77ed\u6ce2\uff09\uff1a\u4e3a\u4ec0\u4e48\u653e\u5728\u5ba4\u5185\u5c31\u8db3\u591f\u4e86\uff1f<\/p>\n\n\n\n<p>HF\u9891\u6bb5\u901a\u5e38\u63073-30 MHz\u3002\u5728\u8fd9\u4e2a\u9891\u6bb5\uff0c\u60c5\u51b5\u53d1\u751f\u4e86\u9006\u8f6c\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u4e3b\u8981\u654c\u4eba\uff1a\u73af\u5883\u566a\u58f0\n<ul class=\"wp-block-list\">\n<li>HF\u9891\u6bb5\u5145\u65a5\u7740\u5de8\u5927\u7684\u3001\u65e0\u6cd5\u907f\u514d\u7684\u73af\u5883\u566a\u58f0\u3002\u8fd9\u4e9b\u566a\u58f0\u6765\u81ea\uff1a\n<ul class=\"wp-block-list\">\n<li>\u5927\u6c14\u566a\u58f0\uff1a \u5168\u7403\u7684\u96f7\u7535\u6d3b\u52a8\u4ea7\u751f\u7684\u5929\u7535\u5e72\u6270\u3002<\/li>\n\n\n\n<li>\u4eba\u4e3a\u566a\u58f0\uff1a \u7535\u7f51\u3001\u7535\u5668\u3001\u5de5\u4e1a\u8bbe\u5907\u7b49\u4ea7\u751f\u7684\u65e0\u7ebf\u7535\u566a\u58f0\u3002<\/li>\n\n\n\n<li>\u94f6\u6cb3\u7cfb\u566a\u58f0\uff1a \u5728\u8f83\u4f4e\u9891\u6bb5\uff08\u598210MHz\u4ee5\u4e0b\uff09\u4e5f\u975e\u5e38\u663e\u8457<\/li>\n\n\n\n<li>\u8fd9\u4e9b\u73af\u5883\u566a\u58f0\u7684\u5f3a\u5ea6\uff0c\u901a\u5e38\u5728-105 dBm\/Hz\u5230-95 dBm\/Hz\u91cf\u7ea7\uff0c\u8fdc\u9ad8\u4e8e\u4e00\u4e2a\u4f18\u79c0LNA\u81ea\u8eab\u7684\u566a\u58f0\uff08\u53ef\u80fd\u4f4e\u4e8e-170 dBm\/Hz\uff09\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\u201c\u566a\u58f0\u5929\u82b1\u677f\u201d\u6548\u5e94\n<ul class=\"wp-block-list\">\n<li>\u53ef\u4ee5\u628a\u73af\u5883\u566a\u58f0\u60f3\u8c61\u6210\u4e00\u4e2a\u5f88\u9ad8\u7684\u201c\u566a\u58f0\u5730\u677f\u201d\u3002\u4f60\u6536\u5230\u7684\u6709\u7528\u4fe1\u53f7\u548c\u8fd9\u4e2a\u5de8\u5927\u7684\u73af\u5883\u566a\u58f0\u662f\u201c\u6346\u7ed1\u201d\u5728\u4e00\u8d77\u8fdb\u5165\u4f60\u7684\u7cfb\u7edf\u7684\u3002<\/li>\n\n\n\n<li>\u5373\u4f7f\u4f60\u5c06\u4e00\u4e2a\u8d85\u4f4e\u566a\u58f0\u7684LNA\u653e\u5728\u5929\u7ebf\u7aef\uff0c\u5b83\u9996\u5148\u653e\u5927\u7684\u662f\u8fd9\u4e2a\u5df2\u7ecf\u5f88\u9ad8\u7684\u201c\u566a\u58f0+\u4fe1\u53f7\u201d\u7ec4\u5408\u3002\u7531\u4e8e\u566a\u58f0\u672c\u8eab\u5df2\u7ecf\u975e\u5e38\u5f3a\uff0cLNA\u81ea\u8eab\u5f15\u5165\u7684\u90a3\u4e00\u70b9\u70b9\u989d\u5916\u566a\u58f0\u76f8\u6bd4\u4e4b\u4e0b\u5c31\u5fae\u4e0d\u8db3\u9053\u4e86\u3002<\/li>\n\n\n\n<li>\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u7cfb\u7edf\u7684\u603b\u566a\u58f0\u6c34\u5e73\u4e3b\u8981\u7531\u73af\u5883\u566a\u58f0\u51b3\u5b9a\uff0c\u800c\u4e0d\u662f\u7531LNA\u548c\u9988\u7ebf\u7684\u566a\u58f0\u51b3\u5b9a\u3002 \u4f60\u5df2\u7ecf\u89e6\u53ca\u4e86\u4e00\u4e2a\u201c\u566a\u58f0\u5929\u82b1\u677f\u201d\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\u5b9e\u8df5\u8003\u91cf\n<ul class=\"wp-block-list\">\n<li>\u6548\u679c\u6709\u9650\uff1a \u5728\u5929\u7ebf\u7aef\u5b89\u88c5LNA\uff0c\u5bf9\u4e8e\u63d0\u5347HF\u63a5\u6536\u7684\u4fe1\u566a\u6bd4\u6548\u679c\u5fae\u4e4e\u5176\u5fae\uff0c\u56e0\u4e3a\u4fe1\u566a\u6bd4\u5728\u4fe1\u53f7\u8fdb\u5165\u9988\u7ebf\u4e4b\u524d\u5c31\u5df2\u7ecf\u88ab\u73af\u5883\u566a\u58f0\u9650\u5236\u4f4f\u4e86\u3002<\/li>\n\n\n\n<li>\u589e\u52a0\u590d\u6742\u5ea6\uff1a \u5728\u5ba4\u5916\u4e3aLNA\u4f9b\u7535\u3001\u9632\u96f7\u3001\u9632\u6c34\uff0c\u589e\u52a0\u4e86\u7cfb\u7edf\u7684\u590d\u6742\u6027\u548c\u6210\u672c\u3002<\/li>\n\n\n\n<li>\u98ce\u9669\uff1a HF\u5929\u7ebf\uff0c\u5c24\u5176\u662f\u5782\u76f4\u548c\u957f\u7ebf\u5929\u7ebf\uff0c\u66f4\u5bb9\u6613\u611f\u5e94\u96f7\u51fb\u80fd\u91cf\uff0c\u5c06\u6602\u8d35\u7684LNA\u653e\u5728\u5ba4\u5916\u98ce\u9669\u66f4\u9ad8\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<p>\u7ed3\u8bba\uff1a\u5bf9\u4e8eHF\u9891\u6bb5\uff0c\u7531\u4e8e\u73af\u5883\u566a\u58f0\u8fdc\u9ad8\u4e8e\u7cfb\u7edf\u5185\u90e8\u566a\u58f0\uff0c\u5c06LNA\u653e\u5728\u5ba4\u5185\u63a5\u6536\u673a\u524d\u7aef\uff0c\u5df2\u7ecf\u8db3\u4ee5\u83b7\u5f97\u8fd1\u4e4e\u6700\u4f73\u7684\u6027\u80fd\u3002\u5c06\u5176\u5b89\u88c5\u5728\u5929\u7ebf\u7aef\u5e26\u6765\u7684\u90a3\u4e00\u70b9\u70b9\u7406\u8bba\u4e0a\u7684\u6027\u80fd\u63d0\u5347\uff0c\u4e0e\u5b83\u5e26\u6765\u7684\u590d\u6742\u6027\u3001\u6210\u672c\u548c\u98ce\u9669\u76f8\u6bd4\uff0c\u662f\u5b8c\u5168\u4e0d\u503c\u5f97\u7684\u3002<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u7279\u6027<\/th><th>VHF\/UHF\/\u5fae\u6ce2\uff08\u5982EME\uff09<\/th><th>HF\uff08\u77ed\u6ce2\uff09<\/th><\/tr><\/thead><tbody><tr><td>\u4e3b\u8981\u566a\u58f0\u6765\u6e90<\/td><td>\u63a5\u6536\u7cfb\u7edf\u81ea\u8eab\uff08\u7279\u522b\u662f\u9988\u7ebf\u635f\u8017\uff09<\/td><td>\u5916\u90e8\u73af\u5883\uff08\u5927\u6c14\u3001\u4eba\u4e3a\u3001\u5b87\u5b99\u566a\u58f0\uff09<\/td><\/tr><tr><td>\u73af\u5883\u566a\u58f0\u6c34\u5e73<\/td><td>\u4f4e<\/td><td>\u975e\u5e38\u9ad8\uff08\u5f62\u6210\u201c\u566a\u58f0\u5929\u82b1\u677f\u201d\uff09<\/td><\/tr><tr><td>\u9988\u7ebf\u635f\u8017<\/td><td>\u663e\u8457\uff0c\u662f\u4e3b\u8981\u77db\u76fe<\/td><td>\u76f8\u5bf9\u8f83\u4f4e\uff0c\u4e0d\u662f\u4e3b\u8981\u77db\u76fe<\/td><\/tr><tr><td>LNA\u6700\u4f73\u4f4d\u7f6e<\/td><td>\u7ebf\u9988\u7535\u70b9\uff08\u5854\u9876\/\u6845\u6746\u4e0a\uff09<\/td><td>\u5ba4\u5185\u63a5\u6536\u673a\u524d\u7aef<\/td><\/tr><tr><td>\u6838\u5fc3\u76ee\u6807<\/td><td>\u514b\u670d\u9988\u7ebf\u635f\u8017\uff0c\u4f18\u5316\u7cfb\u7edf\u566a\u58f0\u7cfb\u6570<\/td><td>\u653e\u5927\u4fe1\u53f7\uff0c\u73af\u5883\u566a\u58f0\u5df2\u5360\u4e3b\u5bfc\uff0c\u4f18\u5316\u610f\u4e49\u4e0d\u5927<\/td><\/tr><tr><td>\u5b9e\u8df5<\/td><td>\u4e3a\u5fae\u5f31\u4fe1\u53f7\u901a\u4fe1\uff08EME\uff0c\u536b\u661f\uff09\u7684\u6807\u51c6\u505a\u6cd5<\/td><td>\u6781\u5c11\u4f7f\u7528\uff0c\u5373\u4fbf\u4f7f\u7528\u4e5f\u653e\u5728\u5ba4\u5185<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>MC1-0886<\/strong><\/h2>\n\n\n\n<p>[Q]\u5047\u8bbe\u4e00\u4e2a\u7528\u4e8e\u536b\u661f\u4e1a\u4f59\u4e1a\u52a1\u7684\u5929\u7ebf\u653e\u5927\u5668\u5de5\u4f5c\u5728\u6807\u51c6\u6e29\u5ea6(17\u2103)\u4e0b\uff0c\u5176\u8f93\u4eba\u7aef\u5df2\u8fde\u697c\u826f\u597d\u5339\u914d\u7684\u5929\u7ebf\u3002\u5982\u679c\u653e\u5927\u5668\u6240\u4ea7\u751f\u7684\u5185\u90e8\u566a\u58f0\u4e0e\u8f93\u5165\u7684\u70ed\u566a\u58f0\u7b49\u6548,\u5219\u8be5\u653e\u5927\u5668\u7684\u566a\u58f0\u7cfb\u6570 Fn\u3001\u566a\u58f0\u6307\u6570 NF \u548c\u566a\u58f0\u6e29\u5ea6 Te \u5206\u522b\u4e3a:<br>[A]<br>[A]2,3dB\uff0c290\u00b0K<br>[B]1,1dB, 0\u00b0K<br>[C]2,0dB\uff0c17\u00b0K<br>[D]1\uff0c0dB\uff0c-273\u00b0K<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u7406\u89e3\u5173\u952e\u6761\u4ef6\uff1a\u95ee\u9898\u6307\u51fa\u653e\u5927\u5668\u7684\u5185\u90e8\u566a\u58f0\u4e0e\u8f93\u5165\u7684\u70ed\u566a\u58f0\u7b49\u6548\u3002\u8fd9\u610f\u5473\u7740\u653e\u5927\u5668\u7684\u5185\u90e8\u566a\u58f0\u529f\u7387\u7b49\u4e8e\u8f93\u5165\u70ed\u566a\u58f0\u529f\u7387\u3002<\/li>\n\n\n\n<li>\u70ed\u566a\u58f0\u529f\u7387\u8ba1\u7b97\uff1a\u8f93\u5165\u70ed\u566a\u58f0\u529f\u7387\u7531\u7ea6\u7ff0\u900a-\u5948\u594e\u65af\u7279\u516c\u5f0f\u7ed9\u51fa\uff0c\u5373 N<sub>i <\/sub>= kT<sub>0<\/sub>B \uff0c\u5176\u4e2d\uff1ak \u662f\u73bb\u5c14\u5179\u66fc\u5e38\u6570\uff0cT<sub>0 <\/sub>\u662f\u6807\u51c6\u6e29\u5ea6\uff08\u95ee\u9898\u4e2d\u4e3a17\u2103\uff0c\u6362\u7b97\u4e3a\u5f00\u5c14\u6587\u6e29\u5ea6\uff1a17 + 273 = 290K\uff09\uff0cB \u662f\u5e26\u5bbd\uff08\u5728\u8ba1\u7b97\u4e2d\u901a\u5e38\u4f1a\u62b5\u6d88\uff0c\u4e0d\u5f71\u54cd\u7ed3\u679c<\/li>\n\n\n\n<li>\u566a\u58f0\u7cfb\u6570\uff08Fn\uff09\u8ba1\u7b97\uff1a\n<ul class=\"wp-block-list\">\n<li>\u566a\u58f0\u7cfb\u6570 F \u5b9a\u4e49\u4e3a\u8f93\u51fa\u4fe1\u566a\u6bd4\u4e0e\u8f93\u5165\u4fe1\u566a\u6bd4\u7684\u6bd4\u503c\uff0c\u6216\u7b49\u6548\u4e3a\u8f93\u51fa\u566a\u58f0\u529f\u7387\u4e0e\u8f93\u5165\u566a\u58f0\u529f\u7387\u7684\u6bd4\u503c\uff08\u8003\u8651\u589e\u76ca\uff09\u3002<\/li>\n\n\n\n<li>\u5982\u679c\u5185\u90e8\u566a\u58f0\u4e0e\u8f93\u5165\u70ed\u566a\u58f0\u7b49\u6548\uff0c\u5219\u603b\u8f93\u51fa\u566a\u58f0\u529f\u7387\u4e3a\u8f93\u5165\u566a\u58f0\u529f\u7387\u7684\u4e24\u500d\uff08\u5373 N<sub>o<\/sub>=2N<sub>i<\/sub> \uff09\u3002<\/li>\n\n\n\n<li>\u56e0\u6b64\uff0c\u566a\u58f0\u7cfb\u6570 F = N<sub>o<\/sub>\/N<sub>i<\/sub>= 2 \uff08\u5047\u8bbe\u589e\u76ca\u4e3a1\uff0c\u6216\u589e\u76ca\u5728\u8ba1\u7b97\u4e2d\u62b5\u6d88\uff09\u3002<\/li>\n\n\n\n<li>\u6240\u4ee5\uff0c\u566a\u58f0\u7cfb\u6570 Fn = 2 .<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\u566a\u58f0\u6307\u6570\uff08NF\uff09\u8ba1\u7b97\uff1a\n<ul class=\"wp-block-list\">\n<li>\u566a\u58f0\u6307\u6570\u662f\u566a\u58f0\u7cfb\u6570\u7684\u5206\u8d1d\u5f62\u5f0f\uff0c\u8ba1\u7b97\u516c\u5f0f\u4e3a NF = 10log<sub>10<\/sub>(F) \u3002<\/li>\n\n\n\n<li>\u4ee3\u5165 F = 2 \uff0c\u5f97 NF = 10log<sub>10<\/sub>(2)=3 dB<\/li>\n\n\n\n<li>\u6240\u4ee5\uff0c\u566a\u58f0\u6307\u6570 NF = 3 dB<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\u566a\u58f0\u6e29\u5ea6\uff08Te\uff09\u8ba1\u7b97\uff1a\n<ul class=\"wp-block-list\">\n<li>\u566a\u58f0\u6e29\u5ea6 T_e \u4e0e\u566a\u58f0\u7cfb\u6570\u7684\u5173\u7cfb\u4e3a F = 1 + T<sub>e<\/sub>\/T<sub>0<\/sub><\/li>\n\n\n\n<li>\u4ee3\u5165 F = 2 \u548c T<sub>0<\/sub> = 290K\uff0c\u5f97 2 = 1 +T<sub>e<\/sub>\/290<\/li>\n\n\n\n<li>\u89e3\u51fa T<sub>e<\/sub>= 290 K .<\/li>\n\n\n\n<li>\u6240\u4ee5\uff0c\u566a\u58f0\u6e29\u5ea6 Te =  290 K .<\/li>\n\n\n\n<li>\u7ed3\u8bba\uff1a\u8ba1\u7b97\u7ed3\u679c\u4e3a Fn = 2 , NF = 3dB , Te = 290 K\uff0c\u8fd9\u4e0e\u9009\u9879 [A] \u5b8c\u5168\u4e00\u81f4\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<p>MC1-1299<\/p>\n\n\n\n<p>\u4f7f\u7528\u78c1\u7535\u5f0f\u4e07\u7528\u8868\u4ea4\u6d41\u7535\u538b\u6863\u6d4b\u91cf\u6b63\u8d1f\u5bf9\u79f0\u7684\u65b9\u6ce2\u7535\u538b\uff08\u5360\u7a7a\u6bd4\u4e3a1:1\uff09\u65f6\uff0c\u6307\u9488\u6240\u793a\u7684\u7535\u538b\u8bfb\u6570\u4f1a\u5927\u4e8e\u8be5\u7535\u538b\u7684\u5cf0\u503c\uff0c\u8fd9\u662f\u7531\u4e8e\u4e07\u7528\u8868\u7684\u5de5\u4f5c\u539f\u7406\u548c\u6821\u51c6\u65b9\u5f0f\u5bfc\u81f4\u7684\u3002\u4e0b\u9762\u9010\u6b65\u89e3\u91ca\u539f\u56e0\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u78c1\u7535\u5f0f\u4e07\u7528\u8868\u4ea4\u6d41\u6863\u7684\u5de5\u4f5c\u539f\u7406\\\n<ul class=\"wp-block-list\">\n<li>\u78c1\u7535\u5f0f\u4e07\u7528\u8868\u91c7\u7528\u52a8\u5708\u5f0f\u8868\u5934\uff0c\u53ea\u80fd\u54cd\u5e94\u76f4\u6d41\u7535\u6d41\u3002\u4e3a\u4e86\u6d4b\u91cf\u4ea4\u6d41\u7535\u538b\uff0c\u4e07\u7528\u8868\u5185\u90e8\u901a\u5e38\u4f7f\u7528\u6574\u6d41\u5668\uff08\u5982\u5168\u6ce2\u6574\u6d41\u6865\uff09\u5c06\u4ea4\u6d41\u4fe1\u53f7\u8f6c\u6362\u4e3a\u76f4\u6d41\uff0c\u7136\u540e\u6d4b\u91cf\u5176\u5e73\u5747\u503c\u3002<\/li>\n\n\n\n<li>\u8868\u76d8\u523b\u5ea6\u662f\u6309\u6b63\u5f26\u6ce2\u7684\u6709\u6548\u503c\uff08RMS\uff09\u6821\u51c6\u7684\u3002\u5bf9\u4e8e\u6b63\u5f26\u6ce2\uff0c\u5168\u6ce2\u6574\u6d41\u540e\u7684\u5e73\u5747\u503c\u4e0e\u6709\u6548\u503c\u4e4b\u95f4\u5b58\u5728\u56fa\u5b9a\u5173\u7cfb\uff1a\u6709\u6548\u503c = 1.11 \u00d7 \u5e73\u5747\u503c\uff08\u5373\u6821\u51c6\u56e0\u5b50\u4e3a1.11\uff09\u3002\u56e0\u6b64\uff0c\u4e07\u7528\u8868\u6d4b\u91cf\u5e73\u5747\u503c\u540e\uff0c\u4f1a\u81ea\u52a8\u4e58\u4ee51.11\u6765\u663e\u793a\u6709\u6548\u503c\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\u6b63\u8d1f\u5bf9\u79f0\u65b9\u6ce2\u7684\u7279\u6027\n<ul class=\"wp-block-list\">\n<li>\u4e00\u4e2a\u6b63\u8d1f\u5bf9\u79f0\u7684\u65b9\u6ce2\u7535\u538b\uff08\u5360\u7a7a\u6bd41:1\uff09\u7684\u6ce2\u5f62\u5728\u6b63\u5cf0\u503c\uff08+Vp\uff09\u548c\u8d1f\u5cf0\u503c\uff08-Vp\uff09\u4e4b\u95f4\u5207\u6362\uff0c\u5404\u536050%\u7684\u65f6\u95f4\u3002<\/li>\n\n\n\n<li>\u8fd9\u79cd\u65b9\u6ce2\u7684\u5b9e\u9645\u6709\u6548\u503c\uff08RMS\uff09\u7b49\u4e8e\u5cf0\u503c\u7535\u538bVp\u3002\u56e0\u4e3a\u8ba1\u7b97RMS\u65f6\uff0c\u7535\u538b\u5e73\u65b9\u540e\u7684\u5e73\u5747\u503c\u4e3aVp\u00b2\uff0c\u518d\u5f00\u65b9\u5f97Vp\u3002<\/li>\n\n\n\n<li>\u5cf0\u503c\u7535\u538b\u662f\u6307\u7535\u538b\u7684\u6700\u5927\u7edd\u5bf9\u503c\uff0c\u5373Vp\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\u4e07\u7528\u8868\u6d4b\u91cf\u65b9\u6ce2\u65f6\u7684\u884c\u4e3a\n<ul class=\"wp-block-list\">\n<li>\u5f53\u4e07\u7528\u8868\u6d4b\u91cf\u8be5\u65b9\u6ce2\u65f6\uff0c\u5185\u90e8\u6574\u6d41\u5668\u4f1a\u5c06\u4ea4\u6d41\u65b9\u6ce2\u8f6c\u6362\u4e3a\u76f4\u6d41\u4fe1\u53f7\u3002\u7531\u4e8e\u65b9\u6ce2\u6b63\u8d1f\u5bf9\u79f0\uff0c\u5168\u6ce2\u6574\u6d41\u540e\u8f93\u51fa\u4e00\u4e2a\u6052\u5b9a\u7684\u76f4\u6d41\u7535\u538b\uff0c\u5176\u503c\u7b49\u4e8e|Vp|\uff0c\u56e0\u6b64\u6574\u6d41\u540e\u7684\u5e73\u5747\u503c\u4e3aVp\u3002<\/li>\n\n\n\n<li>\u4e07\u7528\u8868\u6839\u636e\u6b63\u5f26\u6ce2\u6821\u51c6\uff0c\u4f1a\u9519\u8bef\u5730\u5c06\u8fd9\u4e2a\u5e73\u5747\u503c\u4e58\u4ee51.11\uff0c\u663e\u793a\u503c\u4e3a\uff1a1.11 \u00d7 Vp\u3002<\/li>\n\n\n\n<li>\u56e0\u6b64\uff0c\u663e\u793a\u503c\uff081.11 \u00d7 Vp\uff09\u5927\u4e8e\u5b9e\u9645\u5cf0\u503c\u7535\u538bVp\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\u603b\u7ed3\n<ul class=\"wp-block-list\">\n<li>\u6839\u672c\u539f\u56e0\u662f\u4e07\u7528\u8868\u7684\u6821\u51c6\u56e0\u5b50\uff081.11\uff09\u662f\u9488\u5bf9\u6b63\u5f26\u6ce2\u4f18\u5316\u7684\uff0c\u800c\u65b9\u6ce2\u7684\u6574\u6d41\u5e73\u5747\u503c\u4e0e\u6709\u6548\u503c\u5173\u7cfb\u4e0d\u540c\u3002\u5bf9\u4e8e\u65b9\u6ce2\uff0c\u5b9e\u9645\u6709\u6548\u503c\u7b49\u4e8e\u5cf0\u503c\uff0c\u4f46\u4e07\u7528\u8868\u663e\u793a\u503c\u88ab\u653e\u5927\u4e861.11\u500d\uff0c\u5bfc\u81f4\u8bfb\u6570\u5927\u4e8e\u5cf0\u503c\u3002<\/li>\n\n\n\n<li>\u8fd9\u79cd\u8bef\u5dee\u5728\u6240\u6709\u57fa\u4e8e\u5e73\u5747\u503c\u7684\u6a21\u62df\u4e07\u7528\u8868\u4e2d\u90fd\u4f1a\u51fa\u73b0\uff0c\u56e0\u6b64\u5728\u6d4b\u91cf\u975e\u6b63\u5f26\u6ce2\u65f6\u9700\u8981\u6ce8\u610f\u4eea\u8868\u7684\u9002\u7528\u6027\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\"><strong><em>\u4eceMC2-0001\u5230MC1-1375\u5171\u8ba11375\u9053\u9898\u76ee\u3002\u672c\u5377\u628a\u6bd4\u8f83\u96be\u7684\u6bd4\u8f83\u590d\u6742\u7684\u9898\u76ee\u5df2\u7ecf\u5168\u90e8\u603b\u7ed3\u4e86,\u90e8\u5206\u9898\u76ee\u5c5e\u4e8e\u5e38\u8bc6\u7c7b\u9898\u76ee\u4ee5\u53ca\u77e5\u8bc6\u70b9,\u8fc7\u4e8e\u6742\u6563\u7247\u6bb5\uff0c\u96f6\u788e\u7684\uff0c\u901a\u8fc7\u5b9e\u9645\u5f52\u7eb3\u603b\u7ed3\u77e5\u8bc6\u70b9\u6682\u4e0d\u8bb0\u5f55\u3002\u53cd\u6b63\u8bf8\u541b\u65d7\u5f00\u5f97\u80dc\uff0c\u6b66\u8fd0\u660c\u9686\u3002<\/em><\/strong><\/h2>\n","protected":false},"excerpt":{"rendered":"<p>\u5236\u7ea6\u73b0\u4ee3\u65e0\u7ebf\u7535\u63a5\u6536\u673a\u7075\u654f\u5ea6\u7684\u4e3b\u8981\u56e0\u7d20: \u63a5\u6536\u673a\u7684\u7075\u654f\u5ea6\uff0c\u7b80\u5355\u6765\u8bf4\u5c31\u662f\u5b83\u53ef\u9760\u5730\u63a5\u6536\u5fae\u5f31\u4fe1\u53f7\u7684\u80fd\u529b\u3002\u7075\u654f\u5ea6\u8d8a\u9ad8\uff0c\u80fd [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[30,55],"tags":[],"class_list":["post-615","post","type-post","status-publish","format-standard","hentry","category-technology-horizon","category-technology"],"_links":{"self":[{"href":"http:\/\/www.preluna.xyz\/index.php\/wp-json\/wp\/v2\/posts\/615","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.preluna.xyz\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.preluna.xyz\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.preluna.xyz\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.preluna.xyz\/index.php\/wp-json\/wp\/v2\/comments?post=615"}],"version-history":[{"count":11,"href":"http:\/\/www.preluna.xyz\/index.php\/wp-json\/wp\/v2\/posts\/615\/revisions"}],"predecessor-version":[{"id":860,"href":"http:\/\/www.preluna.xyz\/index.php\/wp-json\/wp\/v2\/posts\/615\/revisions\/860"}],"wp:attachment":[{"href":"http:\/\/www.preluna.xyz\/index.php\/wp-json\/wp\/v2\/media?parent=615"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.preluna.xyz\/index.php\/wp-json\/wp\/v2\/categories?post=615"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.preluna.xyz\/index.php\/wp-json\/wp\/v2\/tags?post=615"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}