{"id":1924,"date":"2026-04-14T22:28:15","date_gmt":"2026-04-14T14:28:15","guid":{"rendered":"http:\/\/www.preluna.xyz\/?p=1924"},"modified":"2026-04-14T22:28:15","modified_gmt":"2026-04-14T14:28:15","slug":"%e5%85%b1%e4%ba%ab%e4%bb%8b%e8%b4%a8%e8%ae%bf%e9%97%ae%e6%8e%a7%e5%88%b6%e8%bf%99%e4%b8%80%e5%9d%97%ef%bc%8c%e4%b8%bb%e7%ba%bf%e5%88%b0%e5%ba%95%e6%98%af%e4%bb%80%e4%b9%88","status":"publish","type":"post","link":"http:\/\/www.preluna.xyz\/index.php\/2026\/04\/14\/%e5%85%b1%e4%ba%ab%e4%bb%8b%e8%b4%a8%e8%ae%bf%e9%97%ae%e6%8e%a7%e5%88%b6%e8%bf%99%e4%b8%80%e5%9d%97%ef%bc%8c%e4%b8%bb%e7%ba%bf%e5%88%b0%e5%ba%95%e6%98%af%e4%bb%80%e4%b9%88\/preluna\/text\/","title":{"rendered":"\u5171\u4eab\u4ecb\u8d28\u8bbf\u95ee\u63a7\u5236\u8fd9\u4e00\u5757\uff0c\u4e3b\u7ebf\u5230\u5e95\u662f\u4ec0\u4e48"},"content":{"rendered":"\n<p>\u8fd9\u4e00\u90e8\u5206\u5728 408 \u91cc\u5f88\u5bb9\u6613\u5b66\u6563\u3002\u8868\u9762\u4e0a\u770b\uff0c\u524d\u9762\u5728\u8bb2\u201c\u590d\u7528\u201d\uff0c\u540e\u9762\u53c8\u5728\u8bb2\u201c\u968f\u673a\u8bbf\u95ee\u201d\u201c\u8f6e\u8be2\u8bbf\u95ee\u201d\uff0c\u518d\u540e\u9762\u8fd8\u4f1a\u5192\u51fa 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class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u51e0\u79cd\u590d\u7528\u65b9\u6cd5\u7684\u533a\u522b\uff0c\u6700\u5e38\u8003\u7684\u5c31\u662f\u201c\u6309\u4ec0\u4e48\u8d44\u6e90\u6765\u5206\u201d<\/h2>\n\n\n\n<p>\u590d\u7528\u672c\u8d28\u4e0a\u4e5f\u662f\u201c\u5171\u4eab\u4e00\u6761\u94fe\u8def\u201d\u7684\u529e\u6cd5\uff0c\u53ea\u4e0d\u8fc7\u5b83\u66f4\u5f3a\u8c03\u201c\u600e\u4e48\u5207\u8d44\u6e90\u201d\u3002<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u590d\u7528\u65b9\u5f0f<\/th><th>\u5212\u5206\u4f9d\u636e<\/th><th>\u5178\u578b\u7279\u70b9<\/th><th>\u5e38\u89c1\u8003\u6cd5<\/th><\/tr><\/thead><tbody><tr><td>\u9891\u5206\u590d\u7528 FDM<\/td><td>\u6309\u9891\u7387\u5206<\/td><td>\u5404\u7528\u6237\u5360\u4e0d\u540c\u9891\u5e26\uff0c\u540c\u65f6\u4f20\u8f93<\/td><td>\u9002\u5408\u6a21\u62df\u4fe1\u53f7\uff1b\u5e26\u4fdd\u62a4\u9891\u5e26<\/td><\/tr><tr><td>\u65f6\u5206\u590d\u7528 TDM<\/td><td>\u6309\u65f6\u95f4\u5206<\/td><td>\u5404\u7528\u6237\u5360\u4e0d\u540c\u65f6\u95f4\u7247\uff0c\u8f6e\u6d41\u4f20\u8f93<\/td><td>\u540c\u6b65\u65f6\u5206\u3001\u7edf\u8ba1\u65f6\u5206\u5e38\u8003\u533a\u522b<\/td><\/tr><tr><td>\u6ce2\u5206\u590d\u7528 WDM<\/td><td>\u6309\u5149\u6ce2\u6ce2\u957f\u5206<\/td><td>\u672c\u8d28\u4e0a\u662f\u5149\u7ea4\u4e2d\u7684\u9891\u5206\u590d\u7528<\/td><td>\u5e38\u548c\u5149\u7ea4\u8054\u7cfb\u5728\u4e00\u8d77<\/td><\/tr><tr><td>\u7801\u5206\u590d\u7528 CDM\/CDMA<\/td><td>\u6309\u7801\u578b\u5206<\/td><td>\u6240\u6709\u4eba\u53ef\u201c\u540c\u65f6\u540c\u9891\u540c\u65f6\u95f4\u201d\u53d1\u9001\uff0c\u9760\u4e0d\u540c\u7801\u7247\u533a\u5206<\/td><td>\u6700\u7231\u51fa\u8ba1\u7b97\u9898<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\u8fd9\u56db\u79cd\u91cc\uff0c408 \u6700\u5bb9\u6613\u51fa\u8ba1\u7b97\u9898\u3001\u4e5f\u6700\u5bb9\u6613\u6df7\u4e71\u7684\uff0c\u5c31\u662f<strong>\u7801\u5206\u590d\u7528<\/strong>\u3002<\/p>\n\n\n\n<p>\u53ef\u4ee5\u7528\u4e00\u53e5\u6781\u7b80\u53e3\u8bc0\u8bb0\uff1a<\/p>\n\n\n\n<p><strong>\u9891\u5206\u770b\u9891\u5e26\uff0c\u65f6\u5206\u770b\u65f6\u9699\uff0c\u6ce2\u5206\u770b\u6ce2\u957f\uff0c\u7801\u5206\u770b\u7801\u5b57\u3002<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u7801\u5206\u590d\u7528\u4e3a\u4ec0\u4e48\u6700\u5bb9\u6613\u4e71<\/h2>\n\n\n\n<p>\u7801\u5206\u590d\u7528\u6700\u53cd\u76f4\u89c9\u7684\u5730\u65b9\u5728\u4e8e\uff1a<br>\u5b83\u4e0d\u662f\u628a\u65f6\u95f4\u5206\u5f00\uff0c\u4e5f\u4e0d\u662f\u628a\u9891\u7387\u5206\u5f00\uff0c\u800c\u662f<strong>\u5927\u5bb6\u540c\u65f6\u53d1<\/strong>\uff0c\u53ea\u662f\u6bcf\u4e2a\u4eba\u5e26\u7740\u81ea\u5df1\u72ec\u6709\u7684\u201c\u7801\u7247\u5e8f\u5217\u201d\u53bb\u53d1\u3002\u63a5\u6536\u65b9\u53ea\u8981\u62ff\u67d0\u4e2a\u7ad9\u70b9\u7684\u7801\u53bb\u548c\u603b\u4fe1\u53f7\u505a\u76f8\u5173\u8fd0\u7b97\uff0c\u5c31\u80fd\u628a\u90a3\u4e2a\u7ad9\u70b9\u7684\u6570\u636e\u201c\u635e\u51fa\u6765\u201d\u3002<\/p>\n\n\n\n<p>\u6240\u4ee5 CDMA \u7684\u6838\u5fc3\u4e0d\u5728\u201c\u5206\u65f6\u201d\u6216\u201c\u5206\u9891\u201d\uff0c\u800c\u5728<strong>\u7801\u7247\u5e8f\u5217\u4e92\u76f8\u6b63\u4ea4<\/strong>\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">1. \u4e24\u4e2a\u6700\u57fa\u672c\u7684\u6761\u4ef6<\/h3>\n\n\n\n<p>\u8bbe\u67d0\u7ad9\u7684\u7801\u7247\u5e8f\u5217\u4e3a <code>S<\/code>\uff0c\u957f\u5ea6\u4e3a <code>m<\/code>\u3002<\/p>\n\n\n\n<p>\u5b83\u5fc5\u987b\u6ee1\u8db3\u4e24\u4e2a\u6761\u4ef6\uff1a<\/p>\n\n\n\n<p>\u7b2c\u4e00\uff0c\u81ea\u5df1\u548c\u81ea\u5df1\u70b9\u4e58\uff1a<br><code>S \u00b7 S = m<\/code><\/p>\n\n\n\n<p>\u7b2c\u4e8c\uff0c\u4e0d\u540c\u7ad9\u4e4b\u95f4\u8981\u6b63\u4ea4\uff1a<br><code>S\u1d62 \u00b7 S\u2c7c = 0\uff08i \u2260 j\uff09<\/code><\/p>\n\n\n\n<p>\u8fd9\u5c31\u662f\u4e3a\u4ec0\u4e48\u9898\u76ee\u91cc\u7ecf\u5e38\u7ed9\u51fa\u7531 <code>+1<\/code> \u548c <code>-1<\/code> \u7ec4\u6210\u7684\u7801\u7247\u5e8f\u5217\uff0c\u800c\u4e0d\u662f 0 \u548c 1\u3002\u56e0\u4e3a\u7528 <code>\u00b11<\/code> \u505a\u70b9\u4e58\u7279\u522b\u65b9\u4fbf\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u7801\u5206\u590d\u7528\u600e\u4e48\u53d1\u3001\u600e\u4e48\u6536<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">\u53d1\u9001\u89c4\u5219<\/h3>\n\n\n\n<p>\u8fd9\u5757\u662f\u9ad8\u9891\u9677\u9631\u3002<\/p>\n\n\n\n<p>\u82e5\u67d0\u7ad9\u7684\u7801\u7247\u5e8f\u5217\u662f <code>S<\/code>\uff0c\u5219\u901a\u5e38\u89c4\u5b9a\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u53d1\u9001\u6bd4\u7279 <code>1<\/code>\uff0c\u53d1 <code>S<\/code><\/li>\n\n\n\n<li>\u53d1\u9001\u6bd4\u7279 <code>0<\/code>\uff0c\u53d1 <code>-S<\/code><\/li>\n<\/ul>\n\n\n\n<p>\u6ce8\u610f\uff0c<strong>\u53d1\u9001 0 \u4e0d\u662f\u53d1\u5168 0 \u5e8f\u5217\uff0c\u800c\u662f\u53d1\u9001\u53cd\u7801 <code>-S<\/code><\/strong>\u3002<br>\u8fd9\u662f CDMA \u8ba1\u7b97\u9898\u6700\u5e38\u89c1\u7684\u5751\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u63a5\u6536\u89c4\u5219<\/h3>\n\n\n\n<p>\u82e5\u591a\u4e2a\u7ad9\u540c\u65f6\u53d1\u9001\uff0c\u603b\u4fe1\u53f7\u5c31\u662f\u5b83\u4eec\u53d1\u51fa\u7684\u7801\u7247\u5e8f\u5217\u7684\u4ee3\u6570\u548c\uff1a<\/p>\n\n\n\n<p><code>R = d\u2081S\u2081 + d\u2082S\u2082 + ... + d\u2099S\u2099<\/code><\/p>\n\n\n\n<p>\u5176\u4e2d\u6bcf\u4e2a <code>d\u1d62<\/code> \u53d6 <code>+1<\/code> \u6216 <code>-1<\/code>\uff0c\u5206\u522b\u8868\u793a\u8be5\u7ad9\u53d1\u9001 1 \u6216 0\u3002<\/p>\n\n\n\n<p>\u60f3\u6062\u590d\u7b2c <code>k<\/code> \u4e2a\u7ad9\u7684\u6570\u636e\uff0c\u5c31\u7528\u603b\u4fe1\u53f7 <code>R<\/code> \u53bb\u70b9\u4e58\u8be5\u7ad9\u7684\u7801\u7247 <code>S\u2096<\/code>\uff1a<\/p>\n\n\n\n<p><code>R \u00b7 S\u2096 = d\u2096(S\u2096 \u00b7 S\u2096) = d\u2096m<\/code><\/p>\n\n\n\n<p>\u6240\u4ee5\uff1a<\/p>\n\n\n\n<p><code>d\u2096 = (R \u00b7 S\u2096) \/ m<\/code><\/p>\n\n\n\n<p>\u6700\u540e\u5224\u65ad\u6b63\u8d1f\u5373\u53ef\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u7ed3\u679c\u4e3a <code>+1<\/code>\uff0c\u8bf4\u660e\u53d1\u9001\u7684\u662f <code>1<\/code><\/li>\n\n\n\n<li>\u7ed3\u679c\u4e3a <code>-1<\/code>\uff0c\u8bf4\u660e\u53d1\u9001\u7684\u662f <code>0<\/code><\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u7801\u5206\u590d\u7528\u8ba1\u7b97\u9898\u7684\u6781\u7b80\u53e3\u8bc0<\/h2>\n\n\n\n<p>\u8fd9\u4e00\u7c7b\u9898\u6700\u9002\u5408\u7528\u4e00\u53e5\u975e\u5e38\u673a\u68b0\u7684\u53e3\u8bc0\u6765\u505a\uff1a<\/p>\n\n\n\n<p><strong>\u5148\u5206\u6bb5\uff0c\u518d\u70b9\u4e58\uff0c\u540e\u9664\u957f\uff0c\u770b\u6b63\u8d1f\u3002<\/strong><\/p>\n\n\n\n<p>\u518d\u5c55\u5f00\u4e00\u70b9\u5c31\u662f\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u770b\u603b\u63a5\u6536\u5e8f\u5217\u6709\u591a\u957f<\/li>\n\n\n\n<li>\u5982\u679c\u8d85\u8fc7\u4e00\u4e2a\u7801\u7247\u957f\u5ea6\uff0c\u5c31\u6309\u6bcf <code>m<\/code> \u4f4d\u4e00\u7ec4\u5207\u5f00<\/li>\n\n\n\n<li>\u6bcf\u4e00\u7ec4\u5206\u522b\u4e0e\u76ee\u6807\u7ad9\u7684\u7801\u7247\u5e8f\u5217\u70b9\u4e58<\/li>\n\n\n\n<li>\u518d\u9664\u4ee5\u7801\u7247\u957f\u5ea6 <code>m<\/code><\/li>\n\n\n\n<li>\u7ed3\u679c\u6b63\u5c31\u662f 1\uff0c\u8d1f\u5c31\u662f 0<\/li>\n<\/ol>\n\n\n\n<p>\u8fd9\u662f\u505a CDMA \u9898\u6700\u5feb\u3001\u6700\u7a33\u7684\u65b9\u6cd5\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u4fe1\u9053\u5212\u5206\u3001\u968f\u673a\u8bbf\u95ee\u3001\u8f6e\u6d41\u8bbf\u95ee\uff0c\u5230\u5e95\u600e\u4e48\u533a\u5206<\/h2>\n\n\n\n<p>\u8fd9\u4e00\u5757\u4e5f\u662f\u5f88\u5bb9\u6613\u6df7\u3002\u53ef\u4ee5\u76f4\u63a5\u6309\u201c\u8d1f\u8f7d\u9ad8\u4f4e\u201d\u548c\u201c\u662f\u5426\u51b2\u7a81\u201d\u6765\u7406\u89e3\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u4fe1\u9053\u5212\u5206<\/h3>\n\n\n\n<p>\u4fe1\u9053\u5212\u5206\u7684\u601d\u8def\u662f\uff1a<strong>\u5148\u5207\u597d\uff0c\u518d\u4f7f\u7528<\/strong>\u3002<br>\u6bcf\u4e2a\u7ad9\u70b9\u62ff\u5230\u56fa\u5b9a\u8d44\u6e90\uff0c\u5927\u5bb6\u539f\u5219\u4e0a\u4e0d\u51b2\u7a81\u3002<\/p>\n\n\n\n<p>\u4f18\u70b9\u662f\u51b2\u7a81\u5c11\uff0c\u89c4\u5219\u7a33\u5b9a\u3002<br>\u7f3a\u70b9\u662f\u5f53\u67d0\u4e9b\u7ad9\u70b9\u6ca1\u6570\u636e\u65f6\uff0c\u5206\u7ed9\u5b83\u7684\u8d44\u6e90\u5c31\u6d6a\u8d39\u4e86\u3002<\/p>\n\n\n\n<p>\u6240\u4ee5\u5b83\u66f4\u9002\u5408<strong>\u7ad9\u70b9\u90fd\u6bd4\u8f83\u6d3b\u8dc3\u3001\u6d41\u91cf\u6bd4\u8f83\u5e73\u7a33<\/strong>\u7684\u573a\u666f\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u968f\u673a\u8bbf\u95ee<\/h3>\n\n\n\n<p>\u968f\u673a\u8bbf\u95ee\u7684\u601d\u8def\u662f\uff1a<strong>\u4e0d\u9884\u7559\uff0c\u8c01\u8981\u53d1\u8c01\u5c31\u53d1<\/strong>\u3002<br>\u56e0\u6b64\u8d44\u6e90\u5229\u7528\u5728\u4f4e\u8d1f\u8f7d\u65f6\u5f80\u5f80\u4e0d\u9519\uff0c\u4f46\u9ad8\u8d1f\u8f7d\u65f6\u51b2\u7a81\u4f1a\u660e\u663e\u53d8\u591a\u3002<\/p>\n\n\n\n<p>\u4f18\u70b9\u662f\u7075\u6d3b\uff0c\u4f4e\u8d1f\u8f7d\u4e0b\u6548\u7387\u9ad8\u3002<br>\u7f3a\u70b9\u662f\u6709\u51b2\u7a81\uff0c\u9700\u8981\u91cd\u4f20\u548c\u9000\u907f\u673a\u5236\u3002<\/p>\n\n\n\n<p>\u6240\u4ee5\u5b83\u66f4\u9002\u5408<strong>\u7a81\u53d1\u5f0f\u4e1a\u52a1\u3001\u7ad9\u70b9\u53d1\u9001\u4e0d\u5747\u5300<\/strong>\u7684\u573a\u666f\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u8f6e\u6d41\u8bbf\u95ee<\/h3>\n\n\n\n<p>\u8f6e\u6d41\u8bbf\u95ee\u7684\u601d\u8def\u662f\uff1a<strong>\u4e0d\u62a2\uff0c\u6309\u6b21\u5e8f\u6765<\/strong>\u3002<br>\u4f8b\u5982\u8f6e\u8be2\u3001\u4ee4\u724c\u4f20\u9012\u3002<\/p>\n\n\n\n<p>\u4f18\u70b9\u662f\u57fa\u672c\u4e0d\u4f1a\u51b2\u7a81\uff0c\u9002\u5408\u8d1f\u8f7d\u8f83\u9ad8\u65f6\u7ef4\u6301\u79e9\u5e8f\u3002<br>\u7f3a\u70b9\u662f\u63a7\u5236\u5f00\u9500\u5927\uff0c\u800c\u4e14\u4f1a\u6709\u7b49\u5f85\u5ef6\u8fdf\u3002<\/p>\n\n\n\n<p>\u6240\u4ee5\u5b83\u66f4\u9002\u5408<strong>\u5bf9\u51b2\u7a81\u654f\u611f\u3001\u9700\u8981\u516c\u5e73\u6027<\/strong>\u7684\u573a\u666f\u3002<\/p>\n\n\n\n<p>\u4e00\u53e5\u8bdd\u901f\u8bb0\u5c31\u662f\uff1a<\/p>\n\n\n\n<p><strong>\u4fe1\u9053\u5212\u5206\u662f\u201c\u56fa\u5b9a\u5206\u201d\uff0c\u968f\u673a\u8bbf\u95ee\u662f\u201c\u5927\u5bb6\u62a2\u201d\uff0c\u8f6e\u6d41\u8bbf\u95ee\u662f\u201c\u6392\u961f\u53d1\u201d\u3002<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e24\u4e2a ALOHA \u534f\u8bae\uff0c\u6700\u5173\u952e\u5c31\u662f\u201c\u662f\u5426\u6309\u65f6\u9699\u53d1\u9001\u201d<\/h2>\n\n\n\n<p>ALOHA \u662f\u6700\u539f\u59cb\u7684\u968f\u673a\u8bbf\u95ee\u534f\u8bae\uff0c\u601d\u8def\u975e\u5e38\u7c97\u66b4\uff1a\u60f3\u53d1\u5c31\u53d1\uff0c\u649e\u4e86\u518d\u8bf4\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u7eaf ALOHA<\/h3>\n\n\n\n<p>\u7eaf ALOHA \u7684\u7279\u70b9\u662f\uff1a<strong>\u4efb\u4f55\u65f6\u523b\u60f3\u53d1\u5c31\u76f4\u63a5\u53d1<\/strong>\u3002<br>\u56e0\u4e3a\u4e0d\u5bf9\u9f50\u65f6\u9699\uff0c\u6240\u4ee5\u78b0\u649e\u6982\u7387\u5f88\u9ad8\u3002<\/p>\n\n\n\n<p>\u6700\u5e38\u8003\u7684\u7ed3\u8bba\u6709\u4e24\u4e2a\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6613\u53d1\u751f\u51b2\u7a81<\/li>\n\n\n\n<li>\u6700\u5927\u541e\u5410\u91cf\u53ea\u6709 <code>18.4%<\/code><\/li>\n<\/ul>\n\n\n\n<p>\u8fd8\u6709\u4e00\u4e2a\u7ecf\u5178\u8003\u70b9\u53eb<strong>\u6613\u53d7\u51b2\u7a81\u65f6\u95f4<\/strong>\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u7eaf ALOHA \u7684\u6613\u53d7\u51b2\u7a81\u65f6\u95f4\u662f <code>2T<\/code><\/li>\n\n\n\n<li>\u5176\u4e2d <code>T<\/code> \u662f\u4e00\u5e27\u53d1\u9001\u65f6\u95f4<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u65f6\u9699 ALOHA<\/h3>\n\n\n\n<p>\u65f6\u9699 ALOHA \u6bd4\u7eaf ALOHA \u591a\u4e86\u4e00\u4e2a\u7ea6\u675f\uff1a<br>\u53ea\u80fd\u5728\u65f6\u9699\u5f00\u59cb\u5904\u53d1\u9001\u3002<\/p>\n\n\n\n<p>\u8fd9\u6837\u4e00\u6765\uff0c\u78b0\u649e\u7a97\u53e3\u7f29\u5c0f\u4e86\uff0c\u6240\u4ee5\u6027\u80fd\u66f4\u597d\u3002<\/p>\n\n\n\n<p>\u6700\u5e38\u8003\u7ed3\u8bba\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u53ea\u80fd\u5728\u79bb\u6563\u65f6\u9699\u8fb9\u754c\u53d1\u9001<\/li>\n\n\n\n<li>\u6700\u5927\u541e\u5410\u91cf\u662f <code>36.8%<\/code><\/li>\n\n\n\n<li>\u6613\u53d7\u51b2\u7a81\u65f6\u95f4\u53d8\u6210 <code>T<\/code><\/li>\n<\/ul>\n\n\n\n<p>\u6240\u4ee5\u4e8c\u8005\u5bf9\u6bd4\u4e00\u5b9a\u8981\u8bb0\u4f4f\uff1a<\/p>\n\n\n\n<p><strong>\u7eaf ALOHA\uff1a\u968f\u65f6\u53d1\uff0c\u51b2\u7a81\u5927\uff0c\u6700\u5927 18.4%<\/strong><br><strong>\u65f6\u9699 ALOHA\uff1a\u6309\u65f6\u9699\u53d1\uff0c\u51b2\u7a81\u5c0f\uff0c\u6700\u5927 36.8%<\/strong><\/p>\n\n\n\n<p>\u6781\u7b80\u53e3\u8bc0\uff1a<\/p>\n\n\n\n<p><strong>\u7eaf ALOHA \u4e71\u7740\u53d1\uff0c\u65f6\u9699 ALOHA \u5361\u70b9\u53d1\u3002<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e09\u4e2a CSMA \u534f\u8bae\uff0c\u5173\u952e\u4e0d\u5728\u201c\u540d\u5b57\u201d\uff0c\u800c\u5728\u201c\u542c\u5230\u5fd9\u65f6\u600e\u4e48\u505a\u201d<\/h2>\n\n\n\n<p>CSMA \u7684\u672c\u8d28\u6bd4 ALOHA \u66f4\u806a\u660e\u4e00\u70b9\uff1a<br><strong>\u5148\u76d1\u542c\u4fe1\u9053\uff0c\u518d\u51b3\u5b9a\u53d1\u4e0d\u53d1\u3002<\/strong><\/p>\n\n\n\n<p>\u56e0\u6b64\u5b83\u7684\u6838\u5fc3\u5dee\u5f02\u5176\u5b9e\u5c31\u662f\u4e00\u53e5\u8bdd\uff1a<\/p>\n\n\n\n<p><strong>\u4fe1\u9053\u5fd9\u65f6\uff0c\u7ad9\u70b9\u5230\u5e95\u662f\u201c\u7b49\u7740\u542c\u201d\u201c\u8fc7\u4f1a\u518d\u6765\u201d\u8fd8\u662f\u201c\u6309\u6982\u7387\u53d1\u201d\u3002<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">1-\u575a\u6301 CSMA<\/h3>\n\n\n\n<p>\u89c4\u5219\u662f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u82e5\u4fe1\u9053\u7a7a\u95f2\uff0c\u7acb\u5373\u53d1\u9001<\/li>\n\n\n\n<li>\u82e5\u4fe1\u9053\u5fd9\uff0c\u5c31\u6301\u7eed\u76d1\u542c<\/li>\n\n\n\n<li>\u4e00\u65e6\u7a7a\u95f2\uff0c\u7acb\u523b\u53d1\u9001<\/li>\n<\/ul>\n\n\n\n<p>\u4f18\u70b9\u662f\u7a7a\u95f2\u4fe1\u9053\u4e00\u51fa\u73b0\u5c31\u80fd\u6293\u4f4f\u3002<br>\u7f3a\u70b9\u662f\u591a\u4e2a\u7ad9\u70b9\u4e00\u8d77\u7b49\u7740\uff0c\u4e00\u65e6\u7a7a\u95f2\u4f1a\u540c\u65f6\u51b2\u4e0a\u53bb\uff0c\u5bb9\u6613\u78b0\u649e\u3002<\/p>\n\n\n\n<p>\u6240\u4ee5\u5b83\u7684\u7279\u70b9\u53ef\u4ee5\u6982\u62ec\u6210\uff1a<\/p>\n\n\n\n<p><strong>\u79ef\u6781\uff0c\u51b2\u5f97\u5feb\uff0c\u4e5f\u6700\u5bb9\u6613\u624e\u5806\u78b0\u649e\u3002<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u975e\u575a\u6301 CSMA<\/h3>\n\n\n\n<p>\u89c4\u5219\u662f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u82e5\u4fe1\u9053\u7a7a\u95f2\uff0c\u53d1\u9001<\/li>\n\n\n\n<li>\u82e5\u4fe1\u9053\u5fd9\uff0c\u4e0d\u6301\u7eed\u5b88\u7740\u542c\uff0c\u800c\u662f\u968f\u673a\u7b49\u5f85\u4e00\u6bb5\u65f6\u95f4\u540e\u518d\u76d1\u542c<\/li>\n<\/ul>\n\n\n\n<p>\u8fd9\u6837\u505a\u53ef\u4ee5\u51cf\u5c11\u624e\u5806\u51b2\u7a81\u3002<\/p>\n\n\n\n<p>\u6240\u4ee5\u5b83\u7684\u7279\u70b9\u662f\uff1a<\/p>\n\n\n\n<p><strong>\u66f4\u4fdd\u5b88\uff0c\u78b0\u649e\u5c11\uff0c\u4f46\u7b49\u5f85\u65f6\u95f4\u53ef\u80fd\u66f4\u957f\u3002<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">p-\u575a\u6301 CSMA<\/h3>\n\n\n\n<p>\u8fd9\u4e2a\u4e00\u822c\u5efa\u7acb\u5728<strong>\u65f6\u9699\u4fe1\u9053<\/strong>\u57fa\u7840\u4e0a\u3002\u89c4\u5219\u662f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u82e5\u4fe1\u9053\u7a7a\u95f2\uff0c\u4ee5\u6982\u7387 <code>p<\/code> \u53d1\u9001<\/li>\n\n\n\n<li>\u4ee5\u6982\u7387 <code>1-p<\/code> \u63a8\u8fdf\u5230\u4e0b\u4e00\u65f6\u9699<\/li>\n\n\n\n<li>\u82e5\u4fe1\u9053\u5fd9\uff0c\u5219\u7b49\u5f85<\/li>\n<\/ul>\n\n\n\n<p>\u5b83\u4ecb\u4e8e\u524d\u4e24\u8005\u4e4b\u95f4\uff0c\u60f3\u5728\u201c\u5229\u7528\u7387\u201d\u548c\u201c\u51b2\u7a81\u7387\u201d\u4e4b\u95f4\u6298\u4e2d\u3002<\/p>\n\n\n\n<p>\u6240\u4ee5\u4e00\u53e5\u8bdd\u7406\u89e3\uff1a<\/p>\n\n\n\n<p><strong>1-\u575a\u6301\u6700\u6fc0\u8fdb\uff0c\u975e\u575a\u6301\u6700\u4fdd\u5b88\uff0cp-\u575a\u6301\u662f\u6982\u7387\u6298\u4e2d\u3002<\/strong><\/p>\n\n\n\n<p>\u8fd9\u4e09\u8005\u6700\u9002\u5408\u80cc\u6210\u4e00\u7ec4\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>1-\u575a\u6301\uff1a\u7a7a\u95f2\u5c31\u7acb\u523b\u53d1<\/strong><\/li>\n\n\n\n<li><strong>\u975e\u575a\u6301\uff1a\u5fd9\u4e86\u5c31\u5148\u8eb2\u5f00<\/strong><\/li>\n\n\n\n<li><strong>p-\u575a\u6301\uff1a\u7a7a\u95f2\u4e5f\u4e0d\u4e00\u5b9a\u53d1\uff0c\u6309\u6982\u7387\u6765<\/strong><\/li>\n<\/ul>\n\n\n\n<p>\u8fd9\u91cc\u8fd8\u8981\u6ce8\u610f\u4e00\u4e2a\u8003\u8bd5\u9677\u9631\uff1a<br>CSMA \u5df2\u7ecf\u80fd\u51cf\u5c11\u78b0\u649e\uff0c\u4f46<strong>\u4e0d\u80fd\u5f7b\u5e95\u907f\u514d\u78b0\u649e<\/strong>\u3002\u56e0\u4e3a\u5373\u4f7f\u76d1\u542c\u5230\u7a7a\u95f2\uff0c\u4e5f\u53ef\u80fd\u7531\u4e8e\u4f20\u64ad\u65f6\u5ef6\u5b58\u5728\uff0c\u53e6\u4e00\u4e2a\u7ad9\u70b9\u4e5f\u5728\u51e0\u4e4e\u540c\u4e00\u65f6\u523b\u5f00\u59cb\u53d1\u9001\u3002<\/p>\n\n\n\n<p>\u6240\u4ee5\u505a\u5224\u65ad\u9898\u65f6\uff0c\u82e5\u9898\u76ee\u8bf4\u201cCSMA \u80fd\u5b8c\u5168\u6d88\u9664\u51b2\u7a81\u201d\uff0c\u90a3\u5c31\u662f\u9519\u7684\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u8f6e\u8be2\u8bbf\u95ee\u7684\u91cd\u70b9\uff0c\u771f\u6b63\u5e38\u8003\u7684\u662f\u201c\u4f18\u70b9\u548c\u81f4\u547d\u7f3a\u70b9\u201d<\/h2>\n\n\n\n<p>\u8f6e\u8be2\u8bbf\u95ee\u5c5e\u4e8e\u53d7\u63a7\u8bbf\u95ee\u3002\u6838\u5fc3\u601d\u60f3\u662f\u6709\u4e00\u4e2a\u201c\u4e3b\u7ad9\u201d\u6216\u8005\u201c\u4e2d\u5fc3\u63a7\u5236\u8005\u201d\u4f9d\u6b21\u8be2\u95ee\u5404\u4ece\u7ad9\uff1a\u4f60\u6709\u6ca1\u6709\u6570\u636e\u8981\u53d1\uff1f<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u8f6e\u8be2\u8bbf\u95ee\u7684\u4f18\u70b9<\/h3>\n\n\n\n<p>\u6700\u91cd\u8981\u7684\u4e00\u70b9\u662f\uff1a<strong>\u4e0d\u4f1a\u53d1\u751f\u968f\u673a\u51b2\u7a81<\/strong>\u3002<br>\u56e0\u4e3a\u662f\u5426\u53d1\u9001\u662f\u7531\u4e3b\u7ad9\u6388\u6743\u7684\uff0c\u4e0d\u662f\u5927\u5bb6\u62a2\u7740\u53d1\u3002<\/p>\n\n\n\n<p>\u5176\u6b21\uff0c\u516c\u5e73\u6027\u6bd4\u8f83\u597d\uff0c\u8c01\u90fd\u80fd\u8f6e\u5230\u3002<br>\u5728\u9ad8\u8d1f\u8f7d\u60c5\u51b5\u4e0b\uff0c\u79e9\u5e8f\u4f1a\u6bd4\u968f\u673a\u8bbf\u95ee\u7a33\u5b9a\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u8f6e\u8be2\u8bbf\u95ee\u7684\u7f3a\u70b9<\/h3>\n\n\n\n<p>\u6700\u81f4\u547d\u7684\u7f3a\u70b9\u6709\u4e24\u4e2a\uff1a<\/p>\n\n\n\n<p>\u7b2c\u4e00\uff0c<strong>\u8f6e\u8be2\u5f00\u9500<\/strong>\u3002<br>\u54ea\u6015\u67d0\u4e2a\u7ad9\u6ca1\u6709\u6570\u636e\uff0c\u4e5f\u53ef\u80fd\u88ab\u8f6e\u8be2\u4e00\u6b21\uff0c\u6d6a\u8d39\u63a7\u5236\u65f6\u95f4\u3002<\/p>\n\n\n\n<p>\u7b2c\u4e8c\uff0c<strong>\u5355\u70b9\u6545\u969c\u95ee\u9898<\/strong>\u3002<br>\u82e5\u4e3b\u7ad9\u51fa\u95ee\u9898\uff0c\u6574\u4e2a\u8f6e\u8be2\u4f53\u7cfb\u5c31\u53ef\u80fd\u762b\u75ea\u3002<\/p>\n\n\n\n<p>\u6b64\u5916\uff0c\u968f\u7740\u7ad9\u70b9\u53d8\u591a\uff0c\u8f6e\u4e00\u5708\u7684\u65f6\u95f4\u4f1a\u53d8\u957f\uff0c\u7b49\u5f85\u65f6\u5ef6\u4e5f\u4f1a\u4e0a\u5347\u3002<\/p>\n\n\n\n<p>\u6240\u4ee5\u8f6e\u8be2\u8bbf\u95ee\u6700\u5178\u578b\u7684\u7ed3\u8bba\u5c31\u662f\uff1a<\/p>\n\n\n\n<p><strong>\u65e0\u51b2\u7a81\uff0c\u4f46\u6709\u5f00\u9500\uff1b\u6709\u79e9\u5e8f\uff0c\u4f46\u4f9d\u8d56\u4e3b\u7ad9\u3002<\/strong><\/p>\n\n\n\n<p>\u987a\u624b\u4e5f\u53ef\u4ee5\u548c\u4ee4\u724c\u4f20\u9012\u5bf9\u6bd4\u4e00\u4e0b\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u8f6e\u8be2\uff1a\u4e2d\u5fc3\u63a7\u5236<\/li>\n\n\n\n<li>\u4ee4\u724c\uff1a\u5206\u5e03\u5f0f\u63a7\u5236<\/li>\n<\/ul>\n\n\n\n<p>408 \u91cc\u5982\u679c\u9898\u5e72\u63d0\u5230\u201c\u4e3b\u7ad9\u4f9d\u6b21\u8be2\u95ee\u5404\u7ad9\u201d\uff0c\u90a3\u57fa\u672c\u5c31\u662f\u8f6e\u8be2\u3002<br>\u5982\u679c\u9898\u5e72\u63d0\u5230\u201c\u6301\u6709\u4ee4\u724c\u8005\u624d\u53ef\u53d1\u9001\u201d\uff0c\u90a3\u5c31\u662f\u4ee4\u724c\u4f20\u9012\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u8fd9\u4e00\u7ae0\u6700\u5bb9\u6613\u9519\u7684\u51e0\u4e2a\u70b9<\/h2>\n\n\n\n<p>\u8fd9\u4e00\u90e8\u5206\u5b9e\u9645\u4e0a\u6bd4\u6b7b\u8bb0\u5b9a\u4e49\u66f4\u91cd\u8981\uff0c\u56e0\u4e3a\u547d\u9898\u4eba\u5f88\u559c\u6b22\u5728\u8fd9\u4e9b\u5730\u65b9\u8bbe\u9677\u9631\u3002<\/p>\n\n\n\n<p>\u7b2c\u4e00\uff0c<strong>\u590d\u7528\u548c\u4ecb\u8d28\u8bbf\u95ee\u63a7\u5236\u4e0d\u8981\u5b8c\u5168\u6df7\u6210\u4e00\u4ef6\u4e8b<\/strong>\u3002<br>\u590d\u7528\u5f3a\u8c03\u7684\u662f\u4e00\u6761\u94fe\u8def\u5982\u4f55\u88ab\u591a\u4e2a\u4fe1\u53f7\u5171\u4eab\uff1b\u4ecb\u8d28\u8bbf\u95ee\u63a7\u5236\u5f3a\u8c03\u7684\u662f\u5171\u4eab\u4ecb\u8d28\u4e0a\u591a\u4e2a\u7ad9\u70b9\u5982\u4f55\u534f\u8c03\u5360\u7528\u3002<br>\u4f46\u5728\u201c\u4fe1\u9053\u5212\u5206\u4ecb\u8d28\u8bbf\u95ee\u63a7\u5236\u201d\u91cc\uff0c\u4e24\u8005\u53c8\u786e\u5b9e\u4f1a\u53d1\u751f\u4ea4\u53c9\uff0c\u6240\u4ee5\u5bb9\u6613\u6df7\u3002<\/p>\n\n\n\n<p>\u7b2c\u4e8c\uff0c<strong>CDMA \u53d1\u9001 0 \u4e0d\u662f\u53d1 0 \u5e8f\u5217\uff0c\u800c\u662f\u53d1\u53cd\u7801<\/strong>\u3002<br>\u8fd9\u662f\u7801\u5206\u590d\u7528\u8ba1\u7b97\u9898\u91cc\u6700\u5e38\u89c1\u7684\u9519\u6cd5\u3002<\/p>\n\n\n\n<p>\u7b2c\u4e09\uff0c<strong>\u6b63\u4ea4\u6761\u4ef6\u4e0d\u662f\u770b\u5e8f\u5217\u957f\u5f97\u50cf\u4e0d\u50cf\uff0c\u800c\u662f\u770b\u70b9\u4e58\u662f\u5426\u4e3a 0<\/strong>\u3002<br>\u5f88\u591a\u9898\u76ee\u6545\u610f\u7ed9\u51e0\u4e2a\u770b\u8d77\u6765\u201c\u5dee\u4e0d\u591a\u201d\u7684\u5e8f\u5217\uff0c\u771f\u6b63\u5224\u65ad\u6807\u51c6\u53ea\u6709\u70b9\u4e58\u3002<\/p>\n\n\n\n<p>\u7b2c\u56db\uff0c<strong>CSMA \u4e0d\u80fd\u5b8c\u5168\u907f\u514d\u51b2\u7a81<\/strong>\u3002<br>\u5b83\u53ea\u662f\u201c\u5148\u542c\u518d\u53d1\u201d\uff0c\u4e0d\u662f\u201c\u7edd\u5bf9\u65e0\u78b0\u649e\u201d\u3002<\/p>\n\n\n\n<p>\u7b2c\u4e94\uff0c<strong>\u968f\u673a\u8bbf\u95ee\u4e0d\u7b49\u4e8e\u6548\u7387\u4e00\u5b9a\u4f4e<\/strong>\u3002<br>\u4f4e\u8d1f\u8f7d\u4e0b\uff0c\u968f\u673a\u8bbf\u95ee\u5176\u5b9e\u5f88\u7075\u6d3b\uff1b\u771f\u6b63\u4f4e\u6548\u7684\u662f\u9ad8\u8d1f\u8f7d\u4e0b\u51b2\u7a81\u4e25\u91cd\u65f6\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u4f8b\u9898 1\uff1a\u5df2\u77e5 A \u7684\u7801\u7247\u5e8f\u5217\uff0c\u6c42 B \u548c C \u7684\u7801\u7247\u5e8f\u5217\u53ef\u4ee5\u662f\u4ec0\u4e48<\/h2>\n\n\n\n<p>\u9898\u76ee\uff1a<br>\u4e00\u6761\u5e7f\u64ad\u4fe1\u9053\u4e0a\u8fde\u6709 4 \u4e2a\u7ad9\u70b9 A\u3001B\u3001C\u3001D\uff0c\u91c7\u7528\u7801\u5206\u590d\u7528\u6280\u672f\u3002\u5f53 A\u3001B\u3001C \u8981\u5411 D \u53d1\u9001\u6570\u636e\u65f6\uff0c\u8bbe A \u7684\u7801\u7247\u5e8f\u5217\u4e3a <code>(1,-1,1,-1)<\/code>\uff0c\u5219 B \u548c C \u7684\u7801\u7247\u5e8f\u5217\u53ef\u4ee5\u4e3a\uff1f<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u672c\u9898\u7ed3\u8bba<\/h3>\n\n\n\n<p>\u7b54\u6848\u4e0d\u552f\u4e00\u3002\u53ea\u8981\u6ee1\u8db3\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>B<\/code> \u4e0e <code>A<\/code> \u6b63\u4ea4<\/li>\n\n\n\n<li><code>C<\/code> \u4e0e <code>A<\/code> \u6b63\u4ea4<\/li>\n\n\n\n<li><code>B<\/code> \u4e0e <code>C<\/code> \u6b63\u4ea4<\/li>\n<\/ul>\n\n\n\n<p>\u5373\u53ef\u3002<\/p>\n\n\n\n<p>\u4f8b\u5982\u53ef\u4ee5\u53d6\uff1a<\/p>\n\n\n\n<p><code>B = (1,1,-1,-1)<\/code><br><code>C = (1,-1,-1,1)<\/code><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u4e3a\u4ec0\u4e48\u8fd9\u6837\u9009<\/h3>\n\n\n\n<p>\u5148\u770b A\uff1a<\/p>\n\n\n\n<p><code>A = (1,-1,1,-1)<\/code><\/p>\n\n\n\n<p>\u68c0\u67e5 B \u662f\u5426\u4e0e A \u6b63\u4ea4\uff1a<\/p>\n\n\n\n<p><code>A \u00b7 B = 1\u00d71 + (-1)\u00d71 + 1\u00d7(-1) + (-1)\u00d7(-1)<\/code><br><code>= 1 - 1 - 1 + 1 = 0<\/code><\/p>\n\n\n\n<p>\u68c0\u67e5 C \u662f\u5426\u4e0e A \u6b63\u4ea4\uff1a<\/p>\n\n\n\n<p><code>A \u00b7 C = 1\u00d71 + (-1)\u00d7(-1) + 1\u00d7(-1) + (-1)\u00d71<\/code><br><code>= 1 + 1 - 1 - 1 = 0<\/code><\/p>\n\n\n\n<p>\u68c0\u67e5 B \u4e0e C \u662f\u5426\u6b63\u4ea4\uff1a<\/p>\n\n\n\n<p><code>B \u00b7 C = 1\u00d71 + 1\u00d7(-1) + (-1)\u00d7(-1) + (-1)\u00d71<\/code><br><code>= 1 - 1 + 1 - 1 = 0<\/code><\/p>\n\n\n\n<p>\u6240\u4ee5\u8fd9\u7ec4\u53ef\u7528\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u8fd9\u7c7b\u9898\u600e\u4e48\u5feb\u901f\u505a<\/h3>\n\n\n\n<p>\u672c\u9898\u672c\u8d28\u4e0d\u662f\u201c\u6c42\u552f\u4e00\u7b54\u6848\u201d\uff0c\u800c\u662f\u201c\u627e\u4e00\u7ec4\u4e92\u76f8\u6b63\u4ea4\u7684\u5e8f\u5217\u201d\u3002<br>\u6240\u4ee5\u4ee5\u540e\u89c1\u5230\u201c\u53ef\u4ee5\u4e3a\u201d\u4e09\u4e2a\u5b57\uff0c\u5c31\u8981\u7acb\u523b\u60f3\u5230\uff1a<strong>\u7b54\u6848\u53ef\u80fd\u4e0d\u552f\u4e00\uff0c\u53ea\u9700\u9a8c\u8bc1\u6b63\u4ea4\u5373\u53ef\u3002<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u4f8b\u9898 2\uff1a\u6536\u5230\u603b\u5e8f\u5217\uff0c\u5224\u65ad A\u3001B\u3001C \u5206\u522b\u53d1\u9001\u4e86\u4ec0\u4e48<\/h2>\n\n\n\n<p>\u9898\u76ee\uff1a<br>\u7ad9 A\u3001B\u3001C\u3001D \u901a\u8fc7 CDMA \u5171\u4eab\u94fe\u8def\uff0cA\u3001B\u3001C \u8981\u5411 D \u53d1\u9001\u6570\u636e\u3002<br>A\u3001B\u3001C \u7684\u7801\u7247\u5e8f\u5217\u5206\u522b\u662f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>A = (+1,-1,-1,+1)<\/code><\/li>\n\n\n\n<li><code>B = (-1,+1,-1,+1)<\/code><\/li>\n\n\n\n<li><code>C = (+1,+1,+1,+1)<\/code><\/li>\n<\/ul>\n\n\n\n<p>\u82e5 D \u4ece\u94fe\u8def\u4e0a\u6536\u5230\u7684\u5e8f\u5217\u662f <code>(3,-1,1,1)<\/code>\uff0c\u5219 A\u3001B\u3001C \u53d1\u9001\u7684\u6570\u636e\u5206\u522b\u662f\uff1f<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u672c\u9898\u7ed3\u8bba<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A \u53d1\u9001 <code>1<\/code><\/li>\n\n\n\n<li>B \u53d1\u9001 <code>0<\/code><\/li>\n\n\n\n<li>C \u53d1\u9001 <code>1<\/code><\/li>\n<\/ul>\n\n\n\n<p>\u5982\u679c\u7528 <code>\u00b11<\/code> \u8868\u793a\u53d1\u9001\u503c\uff0c\u90a3\u5c31\u662f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A \u53d1\u9001 <code>+1<\/code><\/li>\n\n\n\n<li>B \u53d1\u9001 <code>-1<\/code><\/li>\n\n\n\n<li>C \u53d1\u9001 <code>+1<\/code><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u89e3\u9898\u8fc7\u7a0b<\/h3>\n\n\n\n<p>\u7801\u7247\u957f\u5ea6 <code>m = 4<\/code>\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u5148\u89e3 A<\/h4>\n\n\n\n<p><code>R \u00b7 A = (3,-1,1,1) \u00b7 (1,-1,-1,1)<\/code><\/p>\n\n\n\n<p><code>= 3\u00d71 + (-1)\u00d7(-1) + 1\u00d7(-1) + 1\u00d71<\/code><br><code>= 3 + 1 - 1 + 1 = 4<\/code><\/p>\n\n\n\n<p>\u6240\u4ee5\uff1a<\/p>\n\n\n\n<p><code>dA = 4 \/ 4 = +1<\/code><\/p>\n\n\n\n<p>\u8bf4\u660e A \u53d1\u9001\u7684\u662f <code>1<\/code>\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u518d\u89e3 B<\/h4>\n\n\n\n<p><code>R \u00b7 B = (3,-1,1,1) \u00b7 (-1,1,-1,1)<\/code><\/p>\n\n\n\n<p><code>= 3\u00d7(-1) + (-1)\u00d71 + 1\u00d7(-1) + 1\u00d71<\/code><br><code>= -3 -1 -1 +1 = -4<\/code><\/p>\n\n\n\n<p>\u6240\u4ee5\uff1a<\/p>\n\n\n\n<p><code>dB = -4 \/ 4 = -1<\/code><\/p>\n\n\n\n<p>\u8bf4\u660e B \u53d1\u9001\u7684\u662f <code>0<\/code>\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u518d\u89e3 C<\/h4>\n\n\n\n<p><code>R \u00b7 C = (3,-1,1,1) \u00b7 (1,1,1,1)<\/code><\/p>\n\n\n\n<p><code>= 3 -1 +1 +1 = 4<\/code><\/p>\n\n\n\n<p>\u6240\u4ee5\uff1a<\/p>\n\n\n\n<p><code>dC = 4 \/ 4 = +1<\/code><\/p>\n\n\n\n<p>\u8bf4\u660e C \u53d1\u9001\u7684\u662f <code>1<\/code>\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u672c\u9898\u4e3a\u4ec0\u4e48\u5bb9\u6613\u9519<\/h3>\n\n\n\n<p>\u6700\u5bb9\u6613\u9519\u5728\u4e24\u70b9\u3002<\/p>\n\n\n\n<p>\u7b2c\u4e00\uff0c\u7b97\u51fa <code>-1<\/code> \u4e4b\u540e\uff0c\u4e0d\u77e5\u9053\u5b83\u4ee3\u8868\u4ec0\u4e48\u3002<br>\u8fd9\u91cc\u4e00\u5b9a\u8981\u8bb0\u4f4f\uff1a\u5728 CDMA \u9898\u91cc\uff0c<code>+1<\/code> \u548c <code>-1<\/code> \u901a\u5e38\u5206\u522b\u5bf9\u5e94\u6570\u636e\u4f4d <code>1<\/code> \u548c <code>0<\/code>\u3002<\/p>\n\n\n\n<p>\u7b2c\u4e8c\uff0c\u6ca1\u6709\u9664\u4ee5\u7801\u7247\u957f\u5ea6\u3002<br>\u70b9\u4e58\u7ed3\u679c\u5148\u5f97\u5230\u7684\u662f <code>d \u00d7 m<\/code>\uff0c\u4e0d\u662f\u6700\u7ec8\u6570\u636e\u503c\uff0c\u5fc5\u987b\u518d\u9664\u4ee5 <code>m<\/code>\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u4f8b\u9898 3\uff1a\u8fde\u7eed\u6536\u5230 12 \u4e2a\u7801\u7247\uff0c\u6c42 A \u53d1\u9001\u7684\u6570\u636e\u5e8f\u5217<\/h2>\n\n\n\n<p>\u9898\u76ee\uff1a<br>\u7ad9 A\u3001B\u3001C \u901a\u8fc7 CDMA \u5171\u4eab\u94fe\u8def\uff0cA\u3001B\u3001C \u7684\u7801\u7247\u5e8f\u5217\u5206\u522b\u662f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>A = (1,1,1,1)<\/code><\/li>\n\n\n\n<li><code>B = (1,-1,1,-1)<\/code><\/li>\n\n\n\n<li><code>C = (1,1,-1,-1)<\/code><\/li>\n<\/ul>\n\n\n\n<p>\u82e5 C \u4ece\u94fe\u8def\u4e0a\u6536\u5230\u7684\u5e8f\u5217\u662f\uff1a<\/p>\n\n\n\n<p><code>(2,0,2,0, 0,-2,0,-2, 0,2,0,2)<\/code><\/p>\n\n\n\n<p>\u5219 C \u6536\u5230 A \u53d1\u9001\u7684\u6570\u636e\u662f\uff1f<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u672c\u9898\u7ed3\u8bba<\/h3>\n\n\n\n<p>A \u53d1\u9001\u7684\u6570\u636e\u662f\uff1a<\/p>\n\n\n\n<p><code>101<\/code><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u4e3a\u4ec0\u4e48\u662f 3 \u4f4d\u6570\u636e<\/h3>\n\n\n\n<p>A \u7684\u7801\u7247\u957f\u5ea6\u662f 4\u3002<br>\u603b\u63a5\u6536\u5e8f\u5217\u957f\u5ea6\u662f 12\u3002<br>\u6240\u4ee5\u8bf4\u660e\u603b\u5171\u6536\u5230\u4e86 <code>12 \/ 4 = 3<\/code> \u4e2a\u7801\u5143\uff0c\u4e5f\u5c31\u662f A \u53d1\u4e86 3 \u4f4d\u6570\u636e\u3002<\/p>\n\n\n\n<p>\u6309\u6bcf 4 \u4f4d\u5206\u6bb5\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u7b2c 1 \u6bb5\uff1a<code>(2,0,2,0)<\/code><\/li>\n\n\n\n<li>\u7b2c 2 \u6bb5\uff1a<code>(0,-2,0,-2)<\/code><\/li>\n\n\n\n<li>\u7b2c 3 \u6bb5\uff1a<code>(0,2,0,2)<\/code><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u5206\u522b\u5bf9 A \u7684\u7801\u7247\u505a\u70b9\u4e58<\/h3>\n\n\n\n<p>A \u7684\u7801\u7247\u662f <code>(1,1,1,1)<\/code>\uff0c\u957f\u5ea6 <code>m = 4<\/code>\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u7b2c 1 \u6bb5<\/h4>\n\n\n\n<p><code>(2,0,2,0) \u00b7 (1,1,1,1) = 2 + 0 + 2 + 0 = 4<\/code><\/p>\n\n\n\n<p><code>4 \/ 4 = +1<\/code><\/p>\n\n\n\n<p>\u6240\u4ee5\u7b2c 1 \u4f4d\u662f <code>1<\/code>\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u7b2c 2 \u6bb5<\/h4>\n\n\n\n<p><code>(0,-2,0,-2) \u00b7 (1,1,1,1) = 0 -2 +0 -2 = -4<\/code><\/p>\n\n\n\n<p><code>-4 \/ 4 = -1<\/code><\/p>\n\n\n\n<p>\u6240\u4ee5\u7b2c 2 \u4f4d\u662f <code>0<\/code>\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u7b2c 3 \u6bb5<\/h4>\n\n\n\n<p><code>(0,2,0,2) \u00b7 (1,1,1,1) = 0 +2 +0 +2 = 4<\/code><\/p>\n\n\n\n<p><code>4 \/ 4 = +1<\/code><\/p>\n\n\n\n<p>\u6240\u4ee5\u7b2c 3 \u4f4d\u662f <code>1<\/code>\u3002<\/p>\n\n\n\n<p>\u56e0\u6b64 A \u53d1\u9001\u7684\u662f\uff1a<\/p>\n\n\n\n<p><code>101<\/code><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u8fd9\u7c7b\u9898\u7684\u8bc6\u522b\u4fe1\u53f7<\/h3>\n\n\n\n<p>\u9898\u5e72\u4e00\u65e6\u51fa\u73b0\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u7801\u7247\u957f\u5ea6\u662f 4<\/li>\n\n\n\n<li>\u6536\u5230\u5e8f\u5217\u957f\u5ea6\u660e\u663e\u662f 8\u300112\u300116\u2026\u2026<\/li>\n\n\n\n<li>\u8981\u6c42\u201c\u53d1\u9001\u7684\u6570\u636e\u662f\u4ec0\u4e48\u201d<\/li>\n<\/ul>\n\n\n\n<p>\u5c31\u8981\u7acb\u523b\u60f3\u5230\uff1a<strong>\u4e0d\u662f\u53ea\u89e3 1 \u4f4d\uff0c\u800c\u662f\u8981\u6309\u7801\u7247\u957f\u5ea6\u5206\u6bb5\u9010\u6bb5\u89e3\u7801\u3002<\/strong><\/p>\n\n\n\n<p>\u8fd9\u5c31\u662f\u5f88\u591a\u540c\u5b66\u5728 CDMA \u9898\u91cc\u4e22\u5206\u7684\u539f\u56e0\uff1a<br>\u65b9\u6cd5\u77e5\u9053\uff0c\u4f46\u5fd8\u4e86\u201c\u5206\u6bb5\u201d\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u6700\u540e\u628a\u8fd9\u4e00\u5757\u538b\u6210\u6700\u9002\u5408\u8003\u524d\u56de\u5fc6\u7684\u7248\u672c<\/h2>\n\n\n\n<p>\u8fd9\u4e00\u7ae0\u6700\u9002\u5408\u8003\u524d\u8bb0\u6210\u4e0b\u9762\u8fd9\u7ec4\u8bdd\uff1a<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">1. \u5171\u4eab\u4ecb\u8d28\u8bbf\u95ee\u63a7\u5236\u4e09\u5927\u7c7b<\/h3>\n\n\n\n<p><strong>\u56fa\u5b9a\u5206\u7740\u7528\uff1a\u4fe1\u9053\u5212\u5206<\/strong><br><strong>\u62a2\u7740\u7528\uff1a\u968f\u673a\u8bbf\u95ee<\/strong><br><strong>\u8f6e\u7740\u7528\uff1a\u8f6e\u6d41\u8bbf\u95ee<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2. \u590d\u7528\u65b9\u5f0f\u901f\u8bb0<\/h3>\n\n\n\n<p><strong>\u9891\u5206\u770b\u9891\u5e26\uff0c\u65f6\u5206\u770b\u65f6\u9699\uff0c\u6ce2\u5206\u770b\u6ce2\u957f\uff0c\u7801\u5206\u770b\u7801\u5b57\u3002<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3. CDMA \u8ba1\u7b97\u901f\u8bb0<\/h3>\n\n\n\n<p><strong>1 \u53d1\u539f\u7801\uff0c0 \u53d1\u53cd\u7801\uff1b\u5148\u5206\u6bb5\uff0c\u518d\u70b9\u4e58\uff0c\u540e\u9664\u957f\uff0c\u770b\u6b63\u8d1f\u3002<\/strong><\/p>\n\n\n\n<p>\u5176\u4e2d\uff1a<\/p>\n\n\n\n<p><code>\u6570\u636e = (\u63a5\u6536\u5e8f\u5217 \u00b7 \u672c\u7ad9\u7801\u7247\u5e8f\u5217) \/ \u7801\u7247\u957f\u5ea6<\/code><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">4. ALOHA \u901f\u8bb0<\/h3>\n\n\n\n<p><strong>\u7eaf ALOHA \u968f\u65f6\u53d1\uff0c\u6700\u5927\u541e\u5410 18.4%<\/strong><br><strong>\u65f6\u9699 ALOHA \u6309\u683c\u53d1\uff0c\u6700\u5927\u541e\u5410 36.8%<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">5. \u4e09\u79cd CSMA \u901f\u8bb0<\/h3>\n\n\n\n<p><strong>1-\u575a\u6301\uff1a\u7a7a\u95f2\u5c31\u51b2<\/strong><br><strong>\u975e\u575a\u6301\uff1a\u5fd9\u4e86\u5148\u8eb2<\/strong><br><strong>p-\u575a\u6301\uff1a\u6309\u6982\u7387\u51b2<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">6. \u8f6e\u8be2\u8bbf\u95ee\u901f\u8bb0<\/h3>\n\n\n\n<p><strong>\u65e0\u51b2\u7a81\uff0c\u4f46\u6709\u5f00\u9500\uff1b\u6709\u4e3b\u7ad9\uff0c\u6015\u5355\u70b9\u6545\u969c\u3002<\/strong><\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u8fd9\u4e00\u90e8\u5206\u5728 408 \u91cc\u5f88\u5bb9\u6613\u5b66\u6563\u3002\u8868\u9762\u4e0a\u770b\uff0c\u524d\u9762\u5728\u8bb2\u201c\u590d\u7528\u201d\uff0c\u540e\u9762\u53c8\u5728\u8bb2\u201c\u968f\u673a\u8bbf\u95ee\u201d\u201c\u8f6e\u8be2\u8bbf\u95ee\u201d\uff0c\u518d\u540e\u9762\u8fd8\u4f1a\u5192 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[54],"tags":[],"class_list":["post-1924","post","type-post","status-publish","format-standard","hentry","category-text"],"_links":{"self":[{"href":"http:\/\/www.preluna.xyz\/index.php\/wp-json\/wp\/v2\/posts\/1924","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=1924"}],"version-history":[{"count":1,"href":"http:\/\/www.preluna.xyz\/index.php\/wp-json\/wp\/v2\/posts\/1924\/revisions"}],"predecessor-version":[{"id":1925,"href":"http:\/\/www.preluna.xyz\/index.php\/wp-json\/wp\/v2\/posts\/1924\/revisions\/1925"}],"wp:attachment":[{"href":"http:\/\/www.preluna.xyz\/index.php\/wp-json\/wp\/v2\/media?parent=1924"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.preluna.xyz\/index.php\/wp-json\/wp\/v2\/categories?post=1924"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.preluna.xyz\/index.php\/wp-json\/wp\/v2\/tags?post=1924"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}