{"id":99095,"date":"2024-11-12T15:25:12","date_gmt":"2024-11-12T07:25:12","guid":{"rendered":"https:\/\/www.techphant.cn\/?p=99095"},"modified":"2024-11-12T15:25:16","modified_gmt":"2024-11-12T07:25:16","slug":"cspsfqxpjs","status":"publish","type":"post","link":"https:\/\/www.techphant.cn\/blog\/99095.html","title":{"rendered":"cOFDM\u5c04\u9891\u6536\u53d1\u5668\u82af\u7247\u4ecb\u7ecd"},"content":{"rendered":"\n<p>\u3000\u3000<strong>cOFDM\u5c04\u9891\u6536\u53d1\u5668\u82af\u7247<\/strong>\u662f\u4e00\u79cd\u57fa\u4e8e\u7f16\u7801\u6b63\u4ea4\u9891\u5206\u590d\u7528(Cyclic Orthogonal Frequency Division Multiplexing)\u6280\u672f\u7684\u5c04\u9891\u6536\u53d1\u5668\uff0c\u5b83\u901a\u8fc7\u5c06\u4fe1\u53f7\u5206\u89e3\u4e3a\u591a\u4e2a\u5b50\u9891\u7387\uff0c\u5e76\u5c06\u8fd9\u4e9b\u5b50\u9891\u7387\u5206\u522b\u4f20\u8f93\u5230\u4e00\u4e2a\u9891\u9053\u4e0a\uff0c\u4ece\u800c\u63d0\u9ad8\u4e86\u4f20\u8f93\u6548\u7387\u548c\u4fe1\u53f7\u8d28\u91cf\u3002\u8fd9\u79cd\u6280\u672f\u5177\u6709\u9ad8\u4f20\u8f93\u901f\u7387\u3001\u4f4e\u5ef6\u8fdf\u3001\u4f4e\u529f\u8017\u548c\u9ad8\u53ef\u9760\u6027\u7684\u4f18\u70b9\uff0c\u56e0\u6b64\u5e7f\u6cdb\u5e94\u7528\u4e8e\u5ba4\u5185\u5ba4\u5916\u5bbd\u5e26\u65e0\u7ebf\u7f51\u7edc(\u5982Wi-Fi\u3001LTE\u30015G\u7b49)\u3001\u65e0\u7ebf\u7535\u5e7f\u64ad\u3001\u7535\u89c6\u5e7f\u64ad\u3001\u5bbd\u5e26\u63a5\u5165\u7f51\u7edc\u3001\u65e0\u7ebf\u7535\u8bdd\u4ee5\u53ca\u9ad8\u901f\u6570\u636e\u4f20\u8f93\u7b49\u9886\u57df\u3002<\/p>\n\n\n\n<p>\u3000\u3000cOFDM\u6280\u672f\u7684\u4e00\u4e2a\u5173\u952e\u4f18\u52bf\u5728\u4e8e\u5176\u5bf9\u4fe1\u53f7\u8870\u51cf\u7684\u62b5\u6297\u80fd\u529b\u4ee5\u53ca\u524d\u5411\u7ea0\u9519(FEC)\u529f\u80fd\uff0c\u8fd9\u4f7f\u5f97\u5b83\u53ef\u4ee5\u5728\u79fb\u52a8\u8bbe\u5907\u4e0a\u63d0\u4f9b\u66f4\u5feb\u7684\u4e0a\u7f51\u901f\u5ea6\uff0c\u5e76\u4e14\u5728\u566a\u58f0\u548c\u5e72\u6270\u8f83\u5927\u7684\u73af\u5883\u4e2d\u4e5f\u80fd\u53ef\u9760\u5730\u4f20\u8f93\u4fe1\u53f7\u3002\u6b64\u5916\uff0ccOFDM\u6280\u672f\u8fd8\u53ef\u4ee5\u5b9e\u73b0\u66f4\u9ad8\u7684\u8c03\u5236\u5bc6\u5ea6\uff0c\u4ece\u800c\u8fdb\u4e00\u6b65\u63d0\u9ad8\u4fe1\u53f7\u7684\u4f20\u8f93\u6548\u7387\u3002<\/p>\n\n\n\n<p>\u3000\u3000\u5728\u786c\u4ef6\u5b9e\u73b0\u65b9\u9762\uff0ccOFDM\u5904\u7406\u5668\u901a\u5e38\u91c7\u7528FPGA\u6765\u5b9e\u73b0IFFT\/FFT\u3001\u9891\u7387\u540c\u6b65\u3001\u91c7\u6837\u65f6\u95f4\u540c\u6b65\u548c\u7b26\u53f7\/\u5e27\u540c\u6b65\u7b49\u5173\u952e\u6280\u672f\u3002\u8fd9\u4e9b\u5904\u7406\u5668\u8bbe\u8ba1\u5177\u6709\u7075\u6d3b\u6027\u548c\u53c2\u6570\u5316\u7684\u7279\u70b9\uff0c\u5e76\u4e14\u901a\u8fc7\u4f7f\u7528\u901a\u7528\u7ed3\u6784VHDL\u63cf\u8ff0\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u51cf\u5c11\u529f\u8017\u3002<\/p>\n\n\n\n<p>\u3000\u3000cOFDM\u5c04\u9891\u6536\u53d1\u5668\u82af\u7247\u662f\u4e00\u79cd\u9ad8\u6548\u3001\u53ef\u9760\u7684\u901a\u4fe1\u89e3\u51b3\u65b9\u6848\uff0c\u9002\u7528\u4e8e\u591a\u79cd\u65e0\u7ebf\u901a\u4fe1\u573a\u666f\uff0c\u7279\u522b\u662f\u5728\u9700\u8981\u9ad8\u5e26\u5bbd\u548c\u9ad8\u53ef\u9760\u6027\u7684\u5e94\u7528\u4e2d\u8868\u73b0\u7a81\u51fa\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u3000\u3000\u4e00\u3001 cOFDM\u5c04\u9891\u6536\u53d1\u5668\u82af\u7247\u57285G\u901a\u4fe1\u4e2d\u7684\u5177\u4f53\u5e94\u7528<\/h2>\n\n\n\n<p>\u3000\u3000cOFDM(\u7f16\u7801\u6b63\u4ea4\u9891\u5206\u590d\u7528)\u5c04\u9891\u6536\u53d1\u5668\u82af\u7247\u57285G\u901a\u4fe1\u4e2d\u7684\u5177\u4f53\u5e94\u7528\u548c\u4f18\u52bf\u4e3b\u8981\u4f53\u73b0\u5728\u4ee5\u4e0b\u51e0\u4e2a\u65b9\u9762\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u3000\u3000<strong>\u63d0\u9ad8\u9891\u8c31\u6548\u7387<\/strong>\uff1acOFDM\u901a\u8fc7\u5c06\u4fe1\u53f7\u5206\u89e3\u4e3a\u591a\u4e2a\u5b50\u8f7d\u6ce2\uff0c\u6bcf\u4e2a\u5b50\u8f7d\u6ce2\u4f20\u8f93\u4e0d\u540c\u7684\u4fe1\u606f\uff0c\u4ece\u800c\u63d0\u9ad8\u4e86\u9891\u8c31\u6548\u7387\u548c\u6297\u5e72\u6270\u80fd\u529b\u3002\u8fd9\u79cd\u6280\u672f\u80fd\u591f\u6709\u6548\u5229\u7528\u65e0\u7ebf\u7535\u9891\u8c31\u8d44\u6e90\uff0c\u652f\u6301\u89c6\u8ddd\u9650\u5236\u7a81\u7834\u7684\u5e94\u7528\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u6297\u5e72\u6270\u80fd\u529b\u5f3a<\/strong>\uff1acOFDM\u6280\u672f\u5177\u6709\u6781\u5f3a\u7684\u8870\u51cf\u6297\u6027\uff0c\u80fd\u591f\u5c06\u4fe1\u53f7\u4f20\u8f93\u81f3\u591a\u4e2a\u5b50\u8f7d\u6ce2\uff0c\u4ece\u800c\u5728\u5355\u8f7d\u6ce2\u7cfb\u7edf\u4e2d\u4fdd\u6301\u66f4\u957f\u7684\u4fe1\u53f7\u5bff\u547d\uff0c\u63d0\u9ad8\u5bf9\u7a81\u53d1\u566a\u58f0\u548c\u5feb\u901f\u4fe1\u9053\u8870\u51cf\u7684\u62b5\u6297\u529b\u3002\u6b64\u5916\uff0ccOFDM\u5728\u5f3a\u5e72\u6270\u73af\u5883\u4e0b\u8868\u73b0\u51fa\u8272\uff0c\u80fd\u6709\u6548\u5904\u7406\u591a\u5f84\u4fe1\u53f7\uff0c\u5373\u4f7f\u90e8\u5206\u5b50\u8f7d\u6ce2\u65e0\u6cd5\u5b8c\u5168\u63a5\u6536\uff0c\u4e5f\u80fd\u901a\u8fc7\u6570\u636e\u7ea0\u9519\u65b9\u5f0f\u91cd\u5efa\u6570\u636e\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u9002\u7528\u4e8e\u9ad8\u901f\u6570\u636e\u4f20\u8f93<\/strong>\uff1acOFDM\u7684\u81ea\u9002\u5e94\u8c03\u5236\u673a\u5236\u4f7f\u5b50\u8f7d\u6ce2\u80fd\u591f\u6839\u636e\u4e0d\u540c\u7684\u4fe1\u9053\u6761\u4ef6\u548c\u80cc\u666f\u566a\u58f0\u9009\u62e9\u4e0d\u540c\u7684\u8c03\u5236\u65b9\u6cd5\uff0c\u5982QPSK\u3001QAM\u300116QAM\u621664QAM\uff0c\u4ee5\u9002\u5e94\u9ad8\u6548\u7387\u8c03\u5236\u6216\u6297\u5e72\u6270\u8c03\u5236\uff0c\u786e\u4fdd\u9ad8\u901f\u6570\u636e\u4f20\u8f93\u7684\u53ef\u9760\u6027\u3002\u8fd9\u5bf9\u4e8e5G\u901a\u4fe1\u7cfb\u7edf\u4e2d\u9ad8\u901f\u6570\u636e\u4f20\u8f93\u7684\u9700\u6c42\u5c24\u4e3a\u91cd\u8981\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u4f4e\u5ef6\u8fdf\u548c\u9ad8\u53ef\u9760\u6027<\/strong>\uff1acOFDM\u6280\u672f\u901a\u8fc7\u5728\u6bcf\u4e2a\u5b50\u8f7d\u6ce2\u4e0a\u53d1\u9001\u591a\u4e2a\u6570\u636e\u5757\uff0c\u964d\u4f4e\u4e86\u5ef6\u8fdf\uff0c\u63d0\u9ad8\u4e86\u5b9e\u65f6\u6027\u3002\u540c\u65f6\uff0c\u5b83\u8fd8\u63d0\u9ad8\u4e86\u6570\u636e\u4f20\u8f93\u7684\u53ef\u9760\u6027\uff0c\u8fd9\u5bf9\u4e8e5G\u901a\u4fe1\u7cfb\u7edf\u4e2d\u7684\u5b9e\u65f6\u6027\u548c\u53ef\u9760\u6027\u8981\u6c42\u81f3\u5173\u91cd\u8981\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u7075\u6d3b\u7684\u90e8\u7f72\u548c\u5e94\u7528<\/strong>\uff1acOFDM\u6280\u672f\u5728\u79fb\u52a8\u901a\u4fe1\u3001\u89c6\u9891\u4f20\u8f93\u548c\u76d1\u63a7\u7cfb\u7edf\u7b49\u9886\u57df\u6709\u5e7f\u6cdb\u5e94\u7528\uff0c\u5982\u6570\u5b57\u97f3\u9891\u5e7f\u64ad\u9879\u76ee(DAB)\u3001\u9ad8\u6e05\u7535\u89c6(HDTV)\u5e7f\u64ad\u3001\u533b\u7597\u4fdd\u5065\u3001\u65e0\u7ebf\u5c40\u57df\u7f51(IEEE 802.1la)\u3001\u5bbd\u5e26\u65e0\u7ebf\u63a5\u5165(BwA)\u7b49\u3002\u8fd9\u4e9b\u5e94\u7528\u573a\u666f\u5c55\u793a\u4e86cOFDM\u6280\u672f\u5728\u73b0\u4ee3\u901a\u4fe1\u7cfb\u7edf\u4e2d\u7684\u91cd\u8981\u6027\u548c\u6f5c\u529b\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u652f\u6301\u591a\u7528\u6237\u63a5\u5165<\/strong>\uff1acOFDM\u6280\u672f\u5141\u8bb8\u5728\u76f8\u540c\u7684\u9891\u5e26\u5185\u4f20\u8f93\u66f4\u591a\u7684\u6570\u636e\uff0c\u4ece\u800c\u63d0\u9ad8\u4e86\u9891\u8c31\u5229\u7528\u7387\uff0c\u5e76\u4e14\u652f\u6301\u591a\u7528\u6237\u63a5\u5165\u3002\u8fd9\u5bf9\u4e8e5G\u901a\u4fe1\u7cfb\u7edf\u4e2d\u9700\u8981\u540c\u65f6\u652f\u6301\u5927\u91cf\u7528\u6237\u7684\u573a\u666f\u975e\u5e38\u6709\u5229\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u3000\u3000cOFDM\u5c04\u9891\u6536\u53d1\u5668\u82af\u7247\u57285G\u901a\u4fe1\u4e2d\u5177\u6709\u663e\u8457\u7684\u4f18\u52bf\uff0c\u5305\u62ec\u63d0\u9ad8\u9891\u8c31\u6548\u7387\u3001\u6297\u5e72\u6270\u80fd\u529b\u5f3a\u3001\u9002\u7528\u4e8e\u9ad8\u901f\u6570\u636e\u4f20\u8f93\u3001\u4f4e\u5ef6\u8fdf\u548c\u9ad8\u53ef\u9760\u6027\u3001\u7075\u6d3b\u7684\u90e8\u7f72\u548c\u5e94\u7528\u4ee5\u53ca\u652f\u6301\u591a\u7528\u6237\u63a5\u5165\u7b49\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u3000\u3000\u4e8c\u3001 \u5982\u4f55\u901a\u8fc7FPGA\u5b9e\u73b0cOFDM\u5c04\u9891\u6536\u53d1\u5668\u82af\u7247\u7684\u5173\u952e\u6280\u672f\uff0c\u5305\u62ecIFFT\/FFT\u3001\u9891\u7387\u540c\u6b65\u7b49?<\/h2>\n\n\n\n<p>\u3000\u3000\u901a\u8fc7FPGA\u5b9e\u73b0cOFDM\u5c04\u9891\u6536\u53d1\u5668\u82af\u7247\u7684\u5173\u952e\u6280\u672f\uff0c\u5305\u62ecIFFT\/FFT\u548c\u9891\u7387\u540c\u6b65\u7b49\uff0c\u53ef\u4ee5\u53c2\u8003\u4ee5\u4e0b\u6b65\u9aa4\u548c\u6280\u672f\uff1a<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u3000\u30001.&nbsp;<strong>IFFT\/FFT\u6a21\u5757\u8bbe\u8ba1<\/strong>\uff1a<\/h3>\n\n\n\n<p>\u3000\u3000\u5728OFDM\u7cfb\u7edf\u4e2d\uff0cIFFT(\u9006\u5feb\u901f\u5085\u91cc\u53f6\u53d8\u6362)\u548cFFT(\u5feb\u901f\u5085\u91cc\u53f6\u53d8\u6362)\u662f\u6838\u5fc3\u6a21\u5757\uff0c\u7528\u4e8e\u5c06\u6570\u636e\u4ece\u9891\u57df\u8f6c\u6362\u5230\u65f6\u57df\uff0c\u518d\u4ece\u65f6\u57df\u8f6c\u6362\u56de\u9891\u57df\u3002\u8fd9\u4e9b\u8f6c\u6362\u786e\u4fdd\u4e86\u4fe1\u53f7\u5728\u4f20\u8f93\u8fc7\u7a0b\u4e2d\u7684\u6b63\u4ea4\u6027\u548c\u6297\u5e72\u6270\u80fd\u529b\u3002<\/p>\n\n\n\n<p>\u3000\u3000IFFT\u548cFFT\u901a\u5e38\u91c7\u75288\u70b9\u6216\u66f4\u9ad8\u70b9\u6570\u7684\u5feb\u901f\u5085\u91cc\u53f6\u53d8\u6362\u7b97\u6cd5\u5b9e\u73b0\uff0c\u5982radix-2\u6216radix-4\u7b97\u6cd5\u3002\u8fd9\u4e9b\u7b97\u6cd5\u53ef\u4ee5\u901a\u8fc7\u8774\u8776\u56fe\u6765\u7b80\u5316\u8ba1\u7b97\u8fc7\u7a0b\u3002<\/p>\n\n\n\n<p>\u3000\u3000\u5728FPGA\u4e0a\u5b9e\u73b0IFFT\/FFT\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528\u6d41\u6c34\u7ebf\u7ed3\u6784\u6765\u63d0\u9ad8\u6548\u7387\uff0c\u5e76\u4e14\u53ef\u4ee5\u91c7\u7528\u5b9a\u70b9\u6570\u8fd0\u7b97\u4ee5\u51cf\u5c11\u8d44\u6e90\u6d88\u8017\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u3000\u30002.&nbsp;<strong>QPSK\u8c03\u5236\u4e0e\u89e3\u8c03<\/strong>\uff1a<\/h3>\n\n\n\n<p>\u3000\u3000\u5728OFDM\u7cfb\u7edf\u4e2d\uff0cQPSK(\u56db\u76f8\u4f4d\u504f\u79fb\u952e\u63a7)\u8c03\u5236\u662f\u4e00\u79cd\u5e38\u7528\u7684\u8c03\u5236\u65b9\u5f0f\u3002\u5b83\u5c06\u6bcf\u4e24\u4e2a\u6bd4\u7279\u6620\u5c04\u5230\u590d\u5e73\u9762\u4e0a\u7684\u4e00\u4e2a\u70b9\uff0c\u4ece\u800c\u5b9e\u73b0\u9ad8\u6548\u7684\u6570\u636e\u4f20\u8f93\u3002<\/p>\n\n\n\n<p>\u3000\u3000\u5728\u53d1\u5c04\u7aef\uff0cQPSK\u5e27\u5668\u63a5\u6536\u4e32\u884c\u6570\u636e\u5e76\u5c06\u5176\u8f6c\u6362\u4e3a\u5b9e\u90e8\u548c\u865a\u90e8\u7684\u590d\u6570\u5bf9\uff0c\u7136\u540e\u901a\u8fc7IFFT\u8f6c\u6362\u4e3a\u65f6\u57df\u4fe1\u53f7\u3002<\/p>\n\n\n\n<p>\u3000\u3000\u5728\u63a5\u6536\u7aef\uff0cFFT\u5c06\u63a5\u6536\u5230\u7684\u65f6\u57df\u4fe1\u53f7\u8f6c\u6362\u56de\u9891\u57df\uff0c\u7136\u540e\u901a\u8fc7QPSK\u89e3\u8c03\u5668\u6062\u590d\u539f\u59cb\u6570\u636e\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u3000\u30003.&nbsp;<strong>\u5faa\u73af\u524d\u7f00\uff08CP\uff09\u6a21\u5757<\/strong>\uff1a<\/h3>\n\n\n\n<p>\u3000\u3000\u5faa\u73af\u524d\u7f00\u7528\u4e8e\u6d88\u9664\u591a\u5f84\u6548\u5e94\u5e26\u6765\u7684\u7b26\u53f7\u95f4\u5e72\u6270\u3002\u5728FPGA\u5b9e\u73b0\u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7RAM\u5b58\u50a8IFFT\u6a21\u5757\u7684\u8f93\u51fa\u6570\u636e\uff0c\u5e76\u5c06\u4e0a\u4e00\u4e2aOFDM\u7b26\u53f7\u7684\u540e\u90e8\u5206\u590d\u5236\u5230\u5f53\u524d\u7b26\u53f7\u7684\u524d\u9762\uff0c\u4ece\u800c\u751f\u6210\u5e26\u6709\u5faa\u73af\u524d\u7f00\u7684OFDM\u7b26\u53f7\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u3000\u30004.&nbsp;<strong>\u9891\u7387\u540c\u6b65<\/strong>\uff1a<\/h3>\n\n\n\n<p>\u3000\u3000\u9891\u7387\u540c\u6b65\u662f\u786e\u4fdd\u53d1\u5c04\u673a\u548c\u63a5\u6536\u673a\u9891\u7387\u4e00\u81f4\u7684\u91cd\u8981\u6b65\u9aa4\u3002\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528PLL(\u76f8\u4f4d\u9501\u5b9a\u73af)\u6a21\u5757\u6765\u5b9e\u73b0\u9ad8\u7cbe\u5ea6\u7684\u65f6\u949f\u540c\u6b65\uff0c\u4ece\u800c\u6d88\u9664\u65f6\u949f\u5ef6\u65f6\u548c\u9891\u7387\u504f\u5dee\u3002<\/p>\n\n\n\n<p>\u3000\u3000\u5728FPGA\u5b9e\u73b0\u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u5206\u9891\u5668\u751f\u6210\u6240\u9700\u7684\u65f6\u949f\u4fe1\u53f7\u9891\u7387\uff0c\u5e76\u786e\u4fdd\u53d1\u5c04\u673a\u548c\u63a5\u6536\u673a\u7684\u65f6\u949f\u540c\u6b65\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u3000\u30005.&nbsp;<strong>\u6a21\u5757\u5316\u8bbe\u8ba1\u4e0e\u4eff\u771f\u9a8c\u8bc1<\/strong>\uff1a<\/h3>\n\n\n\n<p>\u3000\u3000OFDM\u6536\u53d1\u5668\u7684\u8bbe\u8ba1\u53ef\u4ee5\u91c7\u7528\u6a21\u5757\u5316\u7684\u65b9\u5f0f\uff0c\u5305\u62ec\u8ba1\u6570\u5668\u3001QPSK\u5e27\u5668\u3001IFFT\u3001PS\/SP\u6a21\u5757\u3001FFT\u548c\u89e3\u5e27\u5668\u7b49\u3002<\/p>\n\n\n\n<p>\u3000\u3000\u4f7f\u7528Xilinx ISE\u8bbe\u8ba1\u5957\u4ef6\u8fdb\u884c\u4eff\u771f\u548c\u9a8c\u8bc1\uff0c\u786e\u4fdd\u5404\u4e2a\u6a21\u5757\u7684\u529f\u80fd\u6b63\u786e\u6027\uff0c\u5e76\u6700\u7ec8\u5728\u76ee\u6807FPGA\u677f\u4e0a\u5b9e\u73b0\u6574\u4e2aOFDM\u6536\u53d1\u5668\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u3000\u3000\u4e09\u3001 cOFDM\u6280\u672f\u7684\u524d\u5411\u7ea0\u9519(FEC)\u529f\u80fd\u662f\u5982\u4f55\u5de5\u4f5c\u7684<\/h2>\n\n\n\n<p>\u3000\u3000cOFDM\u6280\u672f\u4e2d\u7684\u524d\u5411\u7ea0\u9519(FEC)\u529f\u80fd\u901a\u8fc7\u5728\u6570\u636e\u4f20\u8f93\u8fc7\u7a0b\u4e2d\u6dfb\u52a0\u5197\u4f59\u4fe1\u606f\u6765\u63d0\u9ad8\u4fe1\u53f7\u7684\u4f20\u8f93\u53ef\u9760\u6027\u3002\u5177\u4f53\u6765\u8bf4\uff0cFEC\u5728\u53d1\u9001\u7aef\u5bf9\u6570\u636e\u8fdb\u884c\u7f16\u7801\uff0c\u751f\u6210\u989d\u5916\u7684\u5197\u4f59\u4f4d\uff0c\u8fd9\u4e9b\u5197\u4f59\u4f4d\u53ef\u4ee5\u5728\u63a5\u6536\u7aef\u88ab\u7528\u6765\u68c0\u6d4b\u548c\u7ea0\u6b63\u9519\u8bef\u3002<\/p>\n\n\n\n<p>\u3000\u3000FEC\u7684\u5de5\u4f5c\u539f\u7406\u662f\u5229\u7528\u7279\u5b9a\u7684\u7f16\u7801\u7b97\u6cd5\uff0c\u4f8b\u5982Reed-Solomon\u7f16\u7801\uff0c\u5c06\u539f\u59cb\u6570\u636e\u5757\u4e0e\u5197\u4f59\u5757\u4e00\u8d77\u53d1\u9001\u3002\u63a5\u6536\u7aef\u901a\u8fc7\u89e3\u7801\u8fd9\u4e9b\u5197\u4f59\u5757\u6765\u68c0\u6d4b\u5e76\u7ea0\u6b63\u4f20\u8f93\u8fc7\u7a0b\u4e2d\u4ea7\u751f\u7684\u9519\u8bef\u3002\u8fd9\u79cd\u673a\u5236\u4f7f\u5f97\u5373\u4f7f\u5728\u9ad8\u566a\u58f0\u6216\u5e72\u6270\u7684\u73af\u5883\u4e2d\uff0c\u63a5\u6536\u7aef\u4e5f\u80fd\u6062\u590d\u5927\u90e8\u5206\u539f\u59cb\u6570\u636e\uff0c\u4ece\u800c\u63d0\u9ad8\u4fe1\u53f7\u7684\u9c81\u68d2\u6027\u548c\u53ef\u9760\u6027\u3002<\/p>\n\n\n\n<p>\u3000\u3000\u6b64\u5916\uff0cFEC\u8fd8\u80fd\u591f\u964d\u4f4e\u6240\u9700\u7684\u5149\u4fe1\u53f7\u566a\u58f0\u6bd4(OSNR)\uff0c\u8fd9\u610f\u5473\u7740\u5373\u4f7f\u5728\u4fe1\u53f7\u8d28\u91cf\u8f83\u5dee\u7684\u60c5\u51b5\u4e0b\uff0c\u4e5f\u80fd\u4fdd\u6301\u8f83\u9ad8\u7684\u63a5\u6536\u7075\u654f\u5ea6\u548c\u8f83\u4f4e\u7684\u8bef\u7801\u7387\u3002\u8fd9\u5bf9\u4e8e\u65e0\u7ebf\u901a\u4fe1\u7cfb\u7edf\u5c24\u5176\u91cd\u8981\uff0c\u56e0\u4e3a\u65e0\u7ebf\u4fe1\u9053\u901a\u5e38\u4f1a\u5f15\u5165\u591a\u5f84\u6548\u5e94\u548c\u5176\u4ed6\u5e72\u6270\uff0c\u5bfc\u81f4\u4fe1\u53f7\u8d28\u91cf\u4e0b\u964d\u3002<\/p>\n\n\n\n<p>\u3000\u3000\u7136\u800c\uff0cFEC\u4e5f\u6709\u5176\u7f3a\u70b9\u3002\u5b83\u4f1a\u5360\u7528\u4e00\u90e8\u5206\u53ef\u7528\u6bd4\u7279\u7387\uff0c\u56e0\u6b64\u5728\u5e94\u7528FEC\u65f6\u9700\u8981\u6743\u8861\u4fe1\u53f7\u7a33\u5065\u6027\u4e0e\u53ef\u7528\u4e8e\u4f20\u8f93\u89c6\u9891\u7684\u6570\u636e\u91cf\u3002\u6b64\u5916\uff0cFEC\u5728\u6570\u636e\u4f20\u8f93\u4e2d\u5f15\u5165\u4e86\u4e00\u5b9a\u7684\u5ef6\u8fdf\uff0c\u56e0\u4e3a\u63a5\u6536\u7aef\u5fc5\u987b\u7b49\u5f85\u6240\u6709\u5197\u4f59\u5757\u5230\u8fbe\u624d\u80fd\u5f00\u59cb\u89e3\u7801\u548c\u64ad\u653e\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u3000\u3000\u56db\u3001 cOFDM\u5c04\u9891\u6536\u53d1\u5668\u82af\u7247\u9762\u4e34\u7684\u4e3b\u8981\u6311\u6218\u548c\u89e3\u51b3\u65b9\u6848<\/h2>\n\n\n\n<p>\u3000\u3000\u5728\u5b9e\u9645\u90e8\u7f72\u4e2d\uff0ccOFDM\u5c04\u9891\u6536\u53d1\u5668\u82af\u7247\u9762\u4e34\u7684\u4e3b\u8981\u6311\u6218\u548c\u89e3\u51b3\u65b9\u6848\u5982\u4e0b\uff1a<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u3000\u30001. \u4e3b\u8981\u6311\u6218<\/h3>\n\n\n\n<p>\u3000\u3000cOFDM\u63a5\u6536\u5668\u6bd4\u53d1\u5c04\u5668\u66f4\u590d\u6742\uff0c\u4e3b\u8981\u56e0\u4e3a\u9700\u8981\u8fdb\u884c\u65f6\u5e8f\u540c\u6b65\u3001\u8f7d\u6ce2\u540c\u6b65\u3001\u4fe1\u9053\u5747\u8861\u548c\u524d\u5411\u7ea0\u9519(FEC)\u89e3\u7801\u3002\u8fd9\u4e9b\u4efb\u52a1\u589e\u52a0\u4e86\u7cfb\u7edf\u7684\u590d\u6742\u6027\uff0c\u5c24\u5176\u662f\u5728\u9ad8\u52a8\u6001\u73af\u5883\u4e2d\u7684\u5e94\u7528\u3002<\/p>\n\n\n\n<p>\u3000\u3000\u5c04\u9891\u6536\u53d1\u5668\u5728\u901a\u4fe1\u7cfb\u7edf\u4e2d\u901a\u5e38\u5360\u636e\u603b\u529f\u8017\u7684\u5927\u90e8\u5206\uff0c\u5c24\u5176\u662f\u5728\u591a\u6536\u53d1\u5668\u7cfb\u7edf\u8bbe\u8ba1\u4e2d\u3002\u529f\u8017\u95ee\u9898\u4e0d\u4ec5\u5f71\u54cd\u8bbe\u5907\u7684\u6563\u70ed\uff0c\u8fd8\u589e\u52a0\u4e86\u8fd0\u8425\u6210\u672c\uff0c\u7279\u522b\u662f\u57285G\u65e0\u7ebf\u57fa\u7840\u8bbe\u65bd\u4e2d\uff0c\u57fa\u7ad9\u5929\u7ebf\u5854\u7684\u4f9b\u7535\u6210\u672c\u548c\u80fd\u6e90\u6d88\u8017\u6210\u4e3a\u8fd0\u8425\u6210\u672c\u7684\u4e00\u90e8\u5206\u3002<\/p>\n\n\n\n<p>\u3000\u3000\u5728\u8870\u843d\u73af\u5883\u4e0b\uff0c\u67d0\u4e9bCOFDM\u5b50\u4fe1\u9053\u4f1a\u7ecf\u5386\u5f3a\u70c8\u7684\u8870\u51cf\uff0c\u5bfc\u81f4\u6bd4\u7279\u8bef\u7801\u7387\u589e\u52a0\u3002\u8fd9\u4f7f\u5f97\u7cfb\u7edf\u6027\u80fd\u4e0b\u964d\uff0c\u5c24\u5176\u662f\u5728\u6df1\u5ea6\u8870\u843d\u671f\u95f4\u3002<\/p>\n\n\n\n<p>\u3000\u3000\u5728\u79fb\u52a8\u73af\u5883\u4e2d\uff0c\u5bbd\u5e26\u63a5\u6536\u548c\u6ce2\u675f\u8d4b\u5f62\u9762\u4e34\u5c3a\u5bf8\u3001\u6210\u672c\u548c\u529f\u8017\u9650\u5236\u3002\u6b64\u5916\uff0c\u9ad8\u9636\u8c03\u5236\u901a\u4fe1\u4fe1\u53f7\u8981\u6c42\u6781\u9ad8\u7684\u4fe1\u566a\u6bd4\u4ee5\u6700\u5927\u5316\u6709\u9650\u9891\u8c31\u5185\u7684\u6570\u636e\u5bb9\u91cf\uff0c\u8fdb\u4e00\u6b65\u590d\u6742\u4e86\u5bbd\u5e26\u7cfb\u7edf\u7684\u5b9e\u73b0\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u3000\u30002. 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