{"id":98325,"date":"2024-10-16T14:53:44","date_gmt":"2024-10-16T06:53:44","guid":{"rendered":"\/\/www.viralrail.com\/?p=98325"},"modified":"2024-10-16T14:53:51","modified_gmt":"2024-10-16T06:53:51","slug":"oycdqb","status":"publish","type":"post","link":"\/\/www.viralrail.com\/blog\/98325.html","title":{"rendered":"OFDM\u4e0eCOFDM\u7684\u533a\u522b"},"content":{"rendered":"\n

\u3000\u3000OFDM(\u6b63\u4ea4\u9891\u5206\u590d\u7528)<\/strong>\u548cCOFDM(\u7f16\u7801\u6b63\u4ea4\u9891\u5206\u590d\u7528)<\/strong>\u662f\u4e24\u79cd\u76f8\u5173\u7684\u65e0\u7ebf\u901a\u4fe1\u6280\u672f\uff0c\u4f46\u5b83\u4eec\u4e4b\u95f4\u5b58\u5728\u4e00\u4e9b\u5173\u952e\u7684\u533a\u522b\u3002<\/p>\n\n\n\n

\u3000\u3000\u4e00\u3001 OFDM\u548cCOFDM\u6280\u672f\u5bf9\u6bd4<\/h2>\n\n\n\n

\u3000\u30001. \u57fa\u672c\u6982\u5ff5<\/strong>\uff1a<\/h3>\n\n\n\n

\u3000\u3000OFDM\u662f\u4e00\u79cd\u591a\u8f7d\u6ce2\u8c03\u5236\u65b9\u5f0f\uff0c\u5176\u4e3b\u8981\u601d\u60f3\u662f\u5728\u9891\u57df\u5185\u5c06\u7ed9\u5b9a\u4fe1\u9053\u5206\u6210\u8bb8\u591a\u6b63\u4ea4\u5b50\u4fe1\u9053\uff0c\u5728\u6bcf\u4e2a\u5b50\u4fe1\u9053\u4e0a\u4f7f\u7528\u4e00\u4e2a\u5b50\u8f7d\u6ce2\u8fdb\u884c\u8c03\u5236\uff0c\u5e76\u4e14\u5404\u5b50\u8f7d\u6ce2\u5e76\u884c\u4f20\u8f93\u3002<\/p>\n\n\n\n

\u3000\u3000COFDM\u662fOFDM\u4e0e\u4fe1\u9053\u7f16\u7801\u7684\u7ed3\u5408\uff0c\u901a\u8fc7\u5728\u8fdb\u884cOFDM\u8c03\u5236\u4e4b\u524d\u589e\u52a0\u4fe1\u9053\u7f16\u7801(\u4e3b\u8981\u662f\u7ea0\u9519\u7f16\u7801\u548c\u4ea4\u7ec7)\uff0c\u6765\u63d0\u9ad8\u7cfb\u7edf\u7684\u53ef\u9760\u6027\u3002<\/p>\n\n\n\n

\u3000\u30002. \u7f16\u7801\u4e0e\u7ea0\u9519<\/strong>\uff1a<\/h3>\n\n\n\n

\u3000\u3000OFDM\u672c\u8eab\u4e0d\u5305\u542b\u4fe1\u9053\u7f16\u7801\uff0c\u56e0\u6b64\u5bf9\u591a\u5f84\u8870\u843d\u548c\u9891\u7387\u9009\u62e9\u6027\u8870\u843d\u8f83\u4e3a\u654f\u611f\u3002<\/p>\n\n\n\n

\u3000\u3000COFDM\u5219\u5728OFDM\u7684\u57fa\u7840\u4e0a\u589e\u52a0\u4e86\u524d\u5411\u9519\u8bef\u7ea0\u6b63(FEC)\u7f16\u7801\uff0c\u5982Reed-Solomon\u7f16\u7801\u548c\u5377\u79ef\u7f16\u7801\uff0c\u4ee5\u63d0\u9ad8\u4fe1\u53f7\u5728\u6076\u52a3\u4fe1\u9053\u6761\u4ef6\u4e0b\u7684\u4f20\u8f93\u53ef\u9760\u6027\u3002<\/p>\n\n\n\n

\u3000\u30003. \u6027\u80fd\u4e0e\u5e94\u7528<\/strong>\uff1a<\/h3>\n\n\n\n

\u3000\u3000\u5728\u591a\u5f84\u8870\u843d\u73af\u5883\u4e2d\uff0cCOFDM\u6bd4OFDM\u8868\u73b0\u66f4\u597d\uff0c\u56e0\u4e3a\u5b83\u901a\u8fc7\u7f16\u7801\u548c\u4ea4\u7ec7\u6280\u672f\u51cf\u5c11\u4e86\u4fe1\u53f7\u4e22\u5931\u7684\u53ef\u80fd\u6027\u3002<\/p>\n\n\n\n

\u3000\u3000COFDM\u901a\u5e38\u5e94\u7528\u4e8e\u9700\u8981\u9ad8\u53ef\u9760\u6027\u7684\u573a\u666f\uff0c\u5982\u6570\u5b57\u89c6\u9891\u5e7f\u64ad(DVB)\u548c\u6570\u5b57\u97f3\u9891\u5e7f\u64ad(DAB)\uff0c\u800cOFDM\u5219\u5e7f\u6cdb\u5e94\u7528\u4e8e\u65e0\u7ebf\u5c40\u57df\u7f51(WLAN)\u30014G LTE\u7b49\u7cfb\u7edf\u4e2d\u3002<\/p>\n\n\n\n

\u3000\u30004. \u4fe1\u53f7\u7ed5\u5c04\u80fd\u529b<\/strong>\uff1a<\/h3>\n\n\n\n

\u3000\u3000COFDM\u5728\u4fe1\u53f7\u7ed5\u5c04\u80fd\u529b\u4e0a\u4f18\u4e8eOFDM\uff0c\u8fd9\u610f\u5473\u7740\u5728\u590d\u6742\u73af\u5883\u4e2d\uff0cCOFDM\u80fd\u591f\u66f4\u597d\u5730\u4fdd\u6301\u4fe1\u53f7\u7684\u5b8c\u6574\u6027\u3002<\/p>\n\n\n\n

\u3000\u30005. \u4f20\u8f93\u65f6\u5ef6<\/strong>\uff1a<\/h3>\n\n\n\n

\u3000\u3000COFDM\u7531\u4e8e\u589e\u52a0\u4e86\u7f16\u7801\u8fc7\u7a0b\uff0c\u56e0\u6b64\u4f20\u8f93\u65f6\u5ef6\u8f83\u9ad8\uff0c\u8fd9\u5728\u67d0\u4e9b\u5b9e\u65f6\u6027\u8981\u6c42\u8f83\u9ad8\u7684\u5e94\u7528\u573a\u666f\u4e2d\u53ef\u80fd\u662f\u4e00\u4e2a\u7f3a\u70b9\u3002<\/p>\n\n\n\n

\u3000\u3000\u603b\u7ed3\u6765\u8bf4\uff0cCOFDM\u901a\u8fc7\u5f15\u5165\u4fe1\u9053\u7f16\u7801\u548c\u4ea4\u7ec7\u6280\u672f\uff0c\u63d0\u9ad8\u4e86OFDM\u5728\u591a\u5f84\u8870\u843d\u73af\u5883\u4e2d\u7684\u6027\u80fd\u548c\u53ef\u9760\u6027\uff0c\u4f46\u8fd9\u4e5f\u5bfc\u81f4\u4e86\u66f4\u9ad8\u7684\u4f20\u8f93\u65f6\u5ef6\u3002\u56e0\u6b64\uff0c\u9009\u62e9\u54ea\u79cd\u6280\u672f\u53d6\u51b3\u4e8e\u5177\u4f53\u7684\u5e94\u7528\u9700\u6c42\u548c\u73af\u5883\u6761\u4ef6\u3002<\/p>\n\n\n\n

\u3000\u3000\u4e8c\u3001 OFDM\u4e0eCOFDM\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\u7684\u6027\u80fd\u6bd4\u8f83<\/h2>\n\n\n\n

\u3000\u3000OFDM(\u6b63\u4ea4\u9891\u5206\u590d\u7528)\u548cCOFDM(\u7f16\u7801\u6b63\u4ea4\u9891\u5206\u590d\u7528)\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\u7684\u6027\u80fd\u6bd4\u8f83\u7814\u7a76\u4e3b\u8981\u96c6\u4e2d\u5728\u51e0\u4e2a\u65b9\u9762\uff1a<\/p>\n\n\n\n

\u3000\u3000COFDM\u901a\u8fc7\u5f15\u5165\u524d\u5411\u9519\u8bef\u7ea0\u6b63(FEC)\u7f16\u7801\uff0c\u5982\u5377\u79ef\u7801\u3001\u6da1\u8f6e\u7801\u3001BCH\u7801\u7b49\uff0c\u589e\u5f3a\u4e86\u5bf9\u6781\u7aef\u9009\u62e9\u6027\u8870\u843d\u4fe1\u9053\u7684\u9002\u5e94\u80fd\u529b\u3002\u8fd9\u79cd\u7f16\u7801\u65b9\u5f0f\u4f7f\u5f97COFDM\u5728\u79fb\u52a8\u901a\u4fe1\u548c\u5e7f\u64ad\u97f3\u9891\u89c6\u9891\u7f51\u7edc\u4e2d\u8868\u73b0\u66f4\u4e3a\u4f18\u8d8a\uff0c\u5c24\u5176\u662f\u5728\u4fe1\u9053\u72b6\u6001\u4fe1\u606f(CSI)\u5df2\u77e5\u7684\u60c5\u51b5\u4e0b\uff0c\u8f6f\u8f93\u5165\u8f6f\u8f93\u51fa(SISO)\u89e3\u7801\u80fd\u591f\u6709\u6548\u5229\u7528\u5b50\u8f7d\u6ce2\u7684\u5148\u9a8c\u53ef\u9760\u6027\u503c\u8fdb\u884c\u89e3\u7801\u3002<\/p>\n\n\n\n

\u3000\u3000\u5728\u4fe1\u53f7\u7ed5\u5c04\u80fd\u529b\u65b9\u9762\uff0cCOFDM\u6bd4OFDM\u66f4\u5f3a\u3002\u8fd9\u662f\u56e0\u4e3aCOFDM\u7ed3\u5408\u4e86\u4fe1\u9053\u7f16\u7801\u548cOFDM\uff0c\u4f7f\u5f97\u5176\u5728\u4f20\u8f93\u8fc7\u7a0b\u4e2d\u80fd\u591f\u66f4\u597d\u5730\u5e94\u5bf9\u9891\u7387\u9009\u62e9\u6027\u8870\u843d\u548c\u65f6\u53d8\u5e73\u5766\u8870\u843d\u4fe1\u9053\u3002<\/p>\n\n\n\n

\u3000\u3000COFDM\u7531\u4e8e\u5176\u7f16\u7801\u7279\u6027\uff0c\u901a\u5e38\u9700\u8981\u66f4\u9ad8\u7684\u7cfb\u7edf\u590d\u6742\u5ea6\u548c\u6210\u672c\u3002\u4f8b\u5982\uff0c\u5728\u5149\u7ea4\u901a\u4fe1\u4e2d\uff0cCO-OFDM(\u76f8\u5e72\u5149\u5b66OFDM)\u8981\u6c42\u8f83\u9ad8\u7684\u63a5\u6536\u673a\u8bbe\u8ba1\u590d\u6742\u5ea6\uff0c\u4ee5\u5b9e\u73b0\u9ad8\u5149\u8c31\u6548\u7387\u548c\u6297\u504f\u632f\u8272\u6563\u6027\u80fd\u3002\u7136\u800c\uff0c\u8fd9\u4e5f\u5e26\u6765\u4e86\u66f4\u9ad8\u7684\u6027\u80fd\u8868\u73b0\uff0c\u5982\u5728\u63a5\u6536\u7075\u654f\u5ea6\u548c\u5149\u8c31\u6548\u7387\u65b9\u9762\u7684\u4f18\u52bf\u3002<\/p>\n\n\n\n

\u3000\u3000COFDM\u6280\u672f\u56e0\u5176\u6297\u5e72\u6270\u80fd\u529b\u548c\u7f16\u7801\u4f18\u52bf\uff0c\u5728\u5e7f\u64ad\u97f3\u9891\u548c\u89c6\u9891\u7f51\u7edc\u4e2d\u5f97\u5230\u4e86\u5e7f\u6cdb\u5e94\u7528\uff0c\u5982DAB\u3001DRM\u548cDVB-T\u7cfb\u7edf\u3002\u6b64\u5916\uff0cCOFDM\u4e5f\u88ab\u7528\u4e8e\u65e0\u7ebf\u56fe\u4f20\u7cfb\u7edf\u548c\u65e0\u4eba\u673a\u4fe1\u53f7\u4f20\u8f93\u7b49\u573a\u666f\u4e2d\uff0c\u663e\u793a\u51fa\u5176\u5728\u7279\u5b9a\u5e94\u7528\u4e2d\u7684\u6709\u6548\u6027\u3002<\/p>\n\n\n\n

\u3000\u3000\u5c3d\u7ba1COFDM\u5728\u8bb8\u591a\u65b9\u9762\u8868\u73b0\u4f18\u5f02\uff0c\u4f46\u5176\u9ad8\u5cf0\u5747\u529f\u7387\u6bd4(PAPR)\u4ecd\u7136\u662f\u4e00\u4e2a\u6311\u6218\u3002\u8fd9\u8981\u6c42\u975e\u7ebf\u6027\u5668\u4ef6(\u5982DAC\u3001ADC\u548c\u529f\u653e)\u5177\u6709\u66f4\u5927\u7684\u52a8\u6001\u8303\u56f4\uff0c\u4ece\u800c\u5bfc\u81f4\u66f4\u9ad8\u7684\u6210\u672c\u548c\u529f\u8017\u3002<\/p>\n\n\n\n

\u3000\u3000\u603b\u4f53\u6765\u770b\uff0cCOFDM\u5728\u6297\u5e72\u6270\u3001\u7f16\u7801\u80fd\u529b\u548c\u7279\u5b9a\u5e94\u7528\u573a\u666f\u4e2d\u8868\u73b0\u51fa\u8272\uff0c\u4f46\u540c\u65f6\u4e5f\u9762\u4e34\u66f4\u9ad8\u7684\u7cfb\u7edf\u590d\u6742\u5ea6\u548c\u6210\u672c\u3002<\/p>\n\n\n\n

\u3000\u3000\u4e09\u3001 COFDM\u7684\u524d\u5411\u9519\u8bef\u7ea0\u6b63(FEC)\u7f16\u7801\u6280\u672f\u7684\u6700\u65b0\u8fdb\u5c55<\/h2>\n\n\n\n

\u3000\u3000COFDM(\u7f16\u7801\u6b63\u4ea4\u9891\u5206\u590d\u7528)\u7684\u524d\u5411\u9519\u8bef\u7ea0\u6b63(FEC)\u7f16\u7801\u6280\u672f\u5728\u8fd1\u5e74\u6765\u6709\u4e86\u4e00\u4e9b\u663e\u8457\u7684\u8fdb\u5c55\u3002\u9996\u5148\uff0cCOFDM\u7cfb\u7edf\u4e2d\u7684FEC\u6a21\u5757\u662f\u5176\u91cd\u8981\u7ec4\u6210\u90e8\u5206\uff0c\u8d1f\u8d23\u7ea0\u6b63\u4f20\u8f93\u8fc7\u7a0b\u4e2d\u53ef\u80fd\u4ea7\u751f\u7684\u9519\u8bef\u3002\u6b64\u5916\uff0cDOCSIS 3.1\u6807\u51c6\u4e2d\u63d0\u5230\u4f7f\u7528COFDM\u591a\u8f7d\u6ce2\u8c03\u5236\uff0c\u5e76\u7ed3\u5408\u5185\u5c42LDPC\u7f16\u7801\u548c\u5916\u5c42BCH\u7f16\u7801\uff0c\u4ee5\u6ee1\u8db3DOCSIS\u00ae 3.1\/NG\u7684\u8981\u6c42\uff0c\u8fd9\u8868\u660e\u4e86\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\u5bf9FEC\u7f16\u7801\u6280\u672f\u7684\u8fdb\u4e00\u6b65\u4f18\u5316\u548c\u5e94\u7528\u3002<\/p>\n\n\n\n

\u3000\u3000\u53e6\u5916\uff0c\u4e00\u4e9b\u65b0\u7684FEC\u7f16\u7801\u6280\u672f\u4e5f\u5728\u4e0d\u65ad\u88ab\u7814\u7a76\u548c\u5e94\u7528\u3002\u4f8b\u5982\uff0cKP4 FEC\u5728PAM-4\u4e2d\u4f7f\u7528\uff0c\u901a\u8fc7\u589e\u52a0\u5947\u5076\u6821\u9a8c\u7b26\u53f7\u6765\u68c0\u6d4b\u5e76\u7ea0\u6b63\u6700\u591a15\u4e2a\u9519\u8bef\u7684\u7b26\u53f7\uff0c\u4ece\u800c\u5b9e\u73b0\u4e00\u5b9a\u7684\u201c\u7f16\u7801\u589e\u76ca\u201d\uff0c\u5c3d\u7ba1\u8fd9\u4f1a\u5e26\u6765\u989d\u5916\u7684\u529f\u8017\u3001\u5ef6\u8fdf\u548c\u66f4\u9ad8\u7684\u4f20\u8f93\u901f\u7387\u8981\u6c42\u3002\u6b64\u5916\uff0cRaptorQ FEC\u7f16\u7801\u5668\u751f\u6210\u7684ROUTE\u4fee\u590d\u6570\u636e\u5305\uff0c\u4ee5\u53caAL-FEC\u65b9\u6848\u7684\u5e94\u7528\uff0c\u4e5f\u5c55\u793a\u4e86\u5728\u63d0\u9ad8\u4f20\u8f93\u65f6\u57df\u591a\u6837\u6027\u548c\u9c81\u68d2\u6027\u65b9\u9762\u7684\u6700\u65b0\u8fdb\u5c55\u3002<\/p>\n\n\n\n

\u3000\u3000COFDM\u7684FEC\u7f16\u7801\u6280\u672f\u5728\u63d0\u9ad8\u6570\u636e\u4f20\u8f93\u7684\u53ef\u9760\u6027\u548c\u5b9e\u65f6\u6027\u65b9\u9762\u53d6\u5f97\u4e86\u663e\u8457\u8fdb\u5c55\uff0c\u5305\u62ec\u7ed3\u5408\u591a\u79cd\u7f16\u7801\u6280\u672f\u3001\u4f18\u5316\u5197\u4f59\u5ea6\u63a7\u5236\u4ee5\u53ca\u9002\u5e94\u590d\u6742\u7f51\u7edc\u73af\u5883\u7684\u81ea\u9002\u5e94\u7b97\u6cd5\u7b49\u3002<\/p>\n\n\n\n

\u3000\u3000\u56db\u3001 \u5728\u591a\u5f84\u8870\u843d\u73af\u5883\u4e2d\uff0cCOFDM\u5982\u4f55\u5177\u4f53\u51cf\u5c11\u4fe1\u53f7\u4e22\u5931\u7684\u53ef\u80fd\u6027?<\/h2>\n\n\n\n

\u3000\u3000\u5728\u591a\u5f84\u8870\u843d\u73af\u5883\u4e2d\uff0cCOFDM(\u7f16\u7801\u6b63\u4ea4\u9891\u5206\u590d\u7528)\u901a\u8fc7\u591a\u79cd\u65b9\u5f0f\u51cf\u5c11\u4fe1\u53f7\u4e22\u5931\u7684\u53ef\u80fd\u6027\uff1a<\/p>\n\n\n\n

    \n
  • \u3000\u3000\u81ea\u9002\u5e94\u8865\u507f<\/strong>\uff1aCOFDM\u63a5\u6536\u673a\u91c7\u7528\u81ea\u9002\u5e94\u8865\u507f\u7684\u65b9\u5f0f\uff0c\u6709\u6548\u51cf\u5c11\u591a\u5f84\u5e72\u6270\u3002\u8fd9\u610f\u5473\u7740COFDM\u7cfb\u7edf\u80fd\u591f\u6839\u636e\u4fe1\u9053\u6761\u4ef6\u52a8\u6001\u8c03\u6574\u5176\u53c2\u6570\uff0c\u4ece\u800c\u4f18\u5316\u4fe1\u53f7\u7684\u63a5\u6536\u8d28\u91cf\u3002<\/li>\n\n\n\n
  • \u3000\u3000\u4fe1\u9053\u7f16\u7801<\/strong>\uff1aCOFDM\u7ed3\u5408\u4e86OFDM\u8c03\u5236\u548c\u4fe1\u9053\u7f16\u7801\u6280\u672f\u3002\u4fe1\u9053\u7f16\u7801\u5982Reed-Solomon\u7801\u548c\u5377\u79ef\u7801\uff0c\u53ef\u4ee5\u63d0\u9ad8\u4fe1\u53f7\u7684\u6297\u5e72\u6270\u80fd\u529b\uff0c\u4ece\u800c\u589e\u5f3a\u5728\u591a\u5f84\u8870\u843d\u73af\u5883\u4e2d\u7684\u901a\u4fe1\u6027\u80fd\u3002<\/li>\n\n\n\n
  • \u3000\u3000\u9891\u7387\u5206\u96c6<\/strong>\uff1a\u5728\u9891\u7387\u9009\u62e9\u6027\u8870\u843d\u4fe1\u9053\u4e2d\uff0cCOFDM\u5229\u7528\u5b50\u4fe1\u9053\u63d0\u4f9b\u7684\u9891\u7387\u5206\u96c6\u6548\u679c\u3002\u901a\u8fc7\u5728\u4e0d\u540c\u5b50\u4fe1\u9053\u4e0a\u5e94\u7528\u9519\u8bef\u63a7\u5236\u7f16\u7801\uff0c\u53ef\u4ee5\u8fdb\u4e00\u6b65\u63d0\u9ad8\u4fe1\u53f7\u7684\u53ef\u9760\u6027\u3002<\/li>\n\n\n\n
  • \u3000\u3000\u524d\u5411\u7ea0\u9519\uff08FEC\uff09\u529f\u80fd<\/strong>\uff1aCOFDM\u5177\u6709\u524d\u5411\u7ea0\u9519\u529f\u80fd\uff0c\u8fd9\u610f\u5473\u7740\u5373\u4f7f\u5728\u4fe1\u53f7\u8870\u51cf\u7684\u60c5\u51b5\u4e0b\uff0c\u4e5f\u80fd\u901a\u8fc7\u5197\u4f59\u6570\u636e\u6765\u7ea0\u6b63\u9519\u8bef\uff0c\u4ece\u800c\u51cf\u5c11\u4fe1\u53f7\u4e22\u5931\u7684\u53ef\u80fd\u6027\u3002<\/li>\n\n\n\n
  • \u3000\u3000\u52a8\u6001\u9002\u5e94\u6027<\/strong>\uff1aCOFDM\u80fd\u591f\u6301\u7eed\u76d1\u63a7\u4f20\u8f93\u4ecb\u8d28\u4e0a\u7684\u901a\u4fe1\u7279\u6027\u53d8\u5316\uff0c\u5e76\u52a8\u6001\u5730\u9002\u5e94\u8fd9\u4e9b\u53d8\u5316\uff0c\u4ee5\u786e\u4fdd\u4fe1\u53f7\u7684\u7a33\u5b9a\u4f20\u8f93\u3002<\/li>\n\n\n\n
  • \u3000\u3000\u591a\u5929\u7ebf\u7cfb\u7edf<\/strong>\uff1a\u901a\u8fc7\u4f7f\u7528\u591a\u5929\u7ebf\u7cfb\u7edf\uff0c\u5982Alamouti\u7a7a\u9891\u591a\u5929\u7ebf\u7cfb\u7edf\uff0cCOFDM\u53ef\u4ee5\u5728\u591a\u5f84\u8870\u843d\u73af\u5883\u4e2d\u8fdb\u4e00\u6b65\u63d0\u9ad8\u4fe1\u53f7\u7684\u63a5\u6536\u8d28\u91cf\u3002<\/li>\n<\/ul>\n\n\n\n

    \u3000\u3000\u4e94\u3001 OFDM\u548cCOFDM\u5728\u65e0\u7ebf\u5c40\u57df\u7f51(WLAN)\u548c4G LTE\u7cfb\u7edf\u4e2d\u7684\u5e94\u7528<\/h2>\n\n\n\n

    \u3000\u3000OFDM(\u6b63\u4ea4\u9891\u5206\u590d\u7528)\u548cCOFDM(\u5faa\u73af\u524d\u7f00\u6b63\u4ea4\u9891\u5206\u590d\u7528)\u5728\u65e0\u7ebf\u5c40\u57df\u7f51(WLAN)\u548c4G LTE\u7cfb\u7edf\u4e2d\u7684\u5e94\u7528\u975e\u5e38\u5e7f\u6cdb\uff0c\u4ee5\u4e0b\u662f\u8be6\u7ec6\u5206\u6790\uff1a<\/p>\n\n\n\n

    \u3000\u30001. \u5728\u65e0\u7ebf\u5c40\u57df\u7f51(WLAN)\u4e2d\u7684\u5e94\u7528<\/h3>\n\n\n\n

    \u3000\u3000IEEE 802.11\u6807\u51c6<\/strong>\uff1a<\/p>\n\n\n\n

    \u3000\u3000OFDM\u6280\u672f\u88ab\u5e7f\u6cdb\u5e94\u7528\u4e8eIEEE 802.11\u6807\u51c6\u4e2d\uff0c\u7279\u522b\u662f\u5728802.11a\/g Wi-Fi\u6807\u51c6\u4e2d\u3002\u8fd9\u4e9b\u6807\u51c6\u5229\u7528OFDM\u6280\u672f\u5b9e\u73b0\u9ad8\u6570\u636e\u901f\u7387\u548c\u5bbd\u5e26\u670d\u52a1\u3002<\/p>\n\n\n\n

    \u3000\u3000OFDM\u901a\u8fc7\u5c06\u5bbd\u5e26\u591a\u5f84\u4fe1\u9053\u8f6c\u6362\u4e3a\u591a\u4e2a\u5e76\u884c\u8f83\u4f4e\u901f\u4fe1\u9053\uff0c\u63d0\u9ad8\u4e86\u9891\u8c31\u5229\u7528\u7387\u548c\u6297\u591a\u5f84\u5e72\u6270\u80fd\u529b\u3002\u8fd9\u4f7f\u5f97OFDM\u6210\u4e3aWLAN\u7269\u7406\u5c42\u63a5\u5165\u65b9\u6848\u7684\u7406\u60f3\u9009\u62e9\u3002<\/p>\n\n\n\n

    \u3000\u3000IEEE 802.16\u6807\u51c6<\/strong>\uff1a<\/p>\n\n\n\n

    \u3000\u3000OFDM\u540c\u6837\u5728IEEE 802.16\u6807\u51c6\u4e2d\u5f97\u5230\u4e86\u5e94\u7528\uff0c\u7528\u4e8eWiMAX(World Interoperability for Microwave Access)\u65e0\u7ebf\u57ce\u57df\u7f51\u6280\u672f\u3002WiMAX\u5229\u7528OFDM\u6280\u672f\u63d0\u4f9b\u9ad8\u8fbe75Mb\/s\u7684\u63a5\u5165\u901f\u5ea6\uff0c\u5e76\u4e14\u8986\u76d6\u8303\u56f4\u53ef\u8fbe50\u5343\u7c73\u3002<\/p>\n\n\n\n

    \u3000\u30002. \u57284G LTE\u7cfb\u7edf\u4e2d\u7684\u5e94\u7528<\/h3>\n\n\n\n

    \u3000\u3000\u57fa\u672c\u539f\u7406\u4e0e\u5173\u952e\u6280\u672f<\/strong>\uff1a<\/p>\n\n\n\n

    \u3000\u3000OFDM\u662f4G LTE\u7f51\u7edc\u7684\u57fa\u672c\u4f20\u8f93\u65b9\u6848\u3002\u5b83\u5c06\u53ef\u7528\u7684\u8f7d\u6ce2\u5e26\u5bbd(\u4f8b\u598220 MHz)\u5212\u5206\u4e3a\u8f83\u5c0f\u7684\u5b50\u8f7d\u6ce2(\u6bcf\u4e2a\u5b50\u8f7d\u6ce2\u4e3a15 kHz)\uff0c\u7136\u540e\u5bf9\u6bcf\u4e2a\u5b50\u8f7d\u6ce2\u5e94\u7528\u6570\u5b57\u8c03\u5236\u6280\u672f\u3002<\/p>\n\n\n\n

    \u3000\u3000OFDM\u5728LTE\u7cfb\u7edf\u4e2d\u4e0d\u4ec5\u7528\u4e8e\u4e0b\u884c\u94fe\u8def(\u4ece\u57fa\u7ad9\u5230\u79fb\u52a8\u7535\u8bdd)\uff0c\u8fd8\u7528\u4e8e\u4e0a\u884c\u94fe\u8def(\u4ece\u79fb\u52a8\u7535\u8bdd\u5230\u57fa\u7ad9)\u3002\u4e0b\u884c\u94fe\u8def\u4f7f\u7528OFDMA(\u6b63\u4ea4\u9891\u5206\u591a\u5740)\uff0c\u800c\u4e0a\u884c\u94fe\u8def\u5219\u4f7f\u7528SC-FDMA(\u5355\u8f7d\u6ce2FDMA)\u3002<\/p>\n\n\n\n

    \u3000\u3000\u591a\u8f7d\u6ce2\u8c03\u5236\u4e0e\u6269\u9891\u6280\u672f<\/strong>\uff1a<\/p>\n\n\n\n

    \u3000\u3000\u7814\u7a76\u4eba\u5458\u8fd8\u5c06\u591a\u8f7d\u6ce2\u8c03\u5236\u4e0e\u6269\u9891\u6280\u672f\u76f8\u7ed3\u5408\uff0c\u5f00\u53d1\u51faMC-CDMA\u548cMC-DS-CDMA\u7b49\u65b0\u591a\u5740\u65b9\u6848\uff0c\u4ee5\u63d0\u9ad8\u7075\u6d3b\u6027\u3001\u9891\u8c31\u6548\u7387\u548c\u68c0\u6d4b\u6027\u80fd\u3002\u8fd9\u4e9b\u6280\u672f\u88ab\u89c6\u4e3a\u6ee1\u8db3\u4e0b\u4e00\u4ee3\u9ad8\u901f\u65e0\u7ebf\u591a\u5a92\u4f53\u901a\u4fe1\u7cfb\u7edf\u8981\u6c42\u7684\u6f5c\u5728\u89e3\u51b3\u65b9\u6848\u3002<\/p>\n\n\n\n

    \u3000\u3000MIMO-OFDM\u6280\u672f<\/strong>\uff1a<\/p>\n\n\n\n

    \u3000\u3000MIMO-OFDM\u6280\u672f\u5728LTE\u3001WiFi\u548cWiMAX\u4e2d\u5f97\u5230\u4e86\u5e7f\u6cdb\u5e94\u7528\u3002\u8fd9\u79cd\u6280\u672f\u7ed3\u5408\u4e86\u7a7a\u95f4\u5206\u96c6(SDMA)\u548c\u7a7a\u65f6\u5757\u7801(STBCs)\uff0c\u8fdb\u4e00\u6b65\u63d0\u5347\u4e86\u4f20\u8f93\u6027\u80fd\u548c\u53ef\u9760\u6027\u3002<\/p>\n\n\n\n

    \u3000\u30003. \u603b\u7ed3<\/h3>\n\n\n\n

    \u3000\u3000OFDM\u548cCOFDM\u5728\u65e0\u7ebf\u5c40\u57df\u7f51(WLAN)\u548c4G LTE\u7cfb\u7edf\u4e2d\u7684\u5e94\u7528\u975e\u5e38\u5e7f\u6cdb\u4e14\u5173\u952e\u3002\u5728WLAN\u4e2d\uff0cOFDM\u88ab\u7528\u4e8eIEEE 802.11\u548c802.16\u6807\u51c6\uff0c\u63d0\u4f9b\u9ad8\u6570\u636e\u901f\u7387\u548c\u5bbd\u5e26\u670d\u52a1\u3002<\/p>\n\n\n\n

    \u3000\u3000\u516d\u3001 COFDM\u4f20\u8f93\u65f6\u5ef6\u5bf9\u5b9e\u65f6\u6027\u8981\u6c42\u9ad8\u7684\u5e94\u7528\u573a\u666f<\/h2>\n\n\n\n

    \u3000\u3000COFDM(\u7801\u5206\u6b63\u4ea4\u9891\u5206\u590d\u7528)\u6280\u672f\u5728\u5b9e\u65f6\u6027\u8981\u6c42\u9ad8\u7684\u5e94\u7528\u573a\u666f\u4e2d\u5177\u6709\u663e\u8457\u7684\u4f18\u52bf\u548c\u6311\u6218\u3002COFDM\u6280\u672f\u901a\u8fc7\u5c06\u6570\u636e\u5206\u6563\u5230\u591a\u4e2a\u8f7d\u6ce2\u4e0a\uff0c\u80fd\u591f\u6709\u6548\u5bf9\u6297\u591a\u5f84\u5e72\u6270\u548c\u9891\u7387\u9009\u62e9\u6027\u8870\u843d\uff0c\u4ece\u800c\u63d0\u9ad8\u4f20\u8f93\u7684\u7a33\u5b9a\u6027\u548c\u53ef\u9760\u6027\u3002\u8fd9\u79cd\u7279\u6027\u4f7f\u5f97COFDM\u5728\u65e0\u7ebf\u89c6\u9891\u4f20\u8f93\u3001\u667a\u80fd\u4ea4\u901a\u3001\u667a\u80fd\u533b\u7597\u7b49\u9886\u57df\u5f97\u5230\u4e86\u5e7f\u6cdb\u5e94\u7528\u3002<\/p>\n\n\n\n

    \u3000\u3000\u7136\u800c\uff0cCOFDM\u6280\u672f\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\u4e5f\u5b58\u5728\u4e00\u5b9a\u7684\u65f6\u5ef6\u95ee\u9898\u3002\u7531\u4e8eCOFDM\u9700\u8981\u5bf9\u6bcf\u4e2a\u7b26\u53f7\u8fdb\u884c\u7f16\u7801\u548c\u89e3\u7801\uff0c\u8fd9\u4f1a\u5f15\u5165\u4e00\u5b9a\u7684\u5904\u7406\u5ef6\u8fdf\u3002\u6b64\u5916\uff0cCOFDM\u7cfb\u7edf\u5728\u9ad8\u901f\u79fb\u52a8\u6761\u4ef6\u4e0b\uff0c\u5982\u6d77\u4e0a\u65e0\u7ebf\u89c6\u9891\u4f20\u8f93\uff0c\u4f1a\u9762\u4e34\u5e26\u5bbd\u8d44\u6e90\u6709\u9650\u548c\u5e72\u6270\u56e0\u7d20\u591a\u7684\u95ee\u9898\uff0c\u8fd9\u4e9b\u56e0\u7d20\u4e5f\u53ef\u80fd\u5bfc\u81f4\u4f20\u8f93\u65f6\u5ef6\u589e\u52a0\u3002<\/p>\n\n\n\n

    \u3000\u3000\u5c3d\u7ba1\u5982\u6b64\uff0cCOFDM\u6280\u672f\u5728\u5b9e\u65f6\u6027\u8981\u6c42\u9ad8\u7684\u5e94\u7528\u573a\u666f\u4e2d\u4ecd\u7136\u8868\u73b0\u51fa\u8272\u3002\u4f8b\u5982\uff0c\u5728\u6d88\u9632\u6f14\u7ec3\u4e2d\uff0cCOFDM\u8bbe\u5907\u80fd\u591f\u4ee5\u8f83\u9ad8\u7684\u901f\u7387\u8fdb\u884c\u6570\u636e\u4f20\u8f93\uff0c\u6ee1\u8db3\u5bf9\u5b9e\u65f6\u6027\u548c\u9ad8\u6e05\u6670\u5ea6\u7684\u8981\u6c42\u3002\u6b64\u5916\uff0cCOFDM\u6280\u672f\u5728\u519b\u4e8b\u65e0\u7ebf\u7535\u4f20\u8f93\u4e2d\u4e5f\u5f97\u5230\u4e86\u5e94\u7528\uff0c\u5176\u9891\u8c31\u5229\u7528\u7387\u9ad8\u548c\u6297\u591a\u5f84\u65f6\u5ef6\u6269\u5c55\u7684\u7279\u70b9\u4f7f\u5176\u5728\u9ad8\u901f\u8fd0\u52a8\u548c\u975e\u89c6\u901a\u6761\u4ef6\u4e0b\u5b9e\u73b0\u9ad8\u8d28\u91cf\u5b9e\u65f6\u56fe\u50cf\u548c\u6570\u636e\u4f20\u8f93\u3002<\/p>\n\n\n\n

    \u3000\u3000COFDM\u6280\u672f\u5728\u5b9e\u65f6\u6027\u8981\u6c42\u9ad8\u7684\u5e94\u7528\u573a\u666f\u4e2d\u5177\u6709\u663e\u8457\u7684\u4f18\u52bf\uff0c\u4f46\u4e5f\u5b58\u5728\u4e00\u5b9a\u7684\u65f6\u5ef6\u95ee\u9898\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

    COFDM\u901a\u8fc7\u5f15\u5165\u4fe1\u9053\u7f16\u7801\u548c\u4ea4\u7ec7\u6280\u672f\uff0c\u63d0\u9ad8\u4e86OFDM\u5728\u591a\u5f84\u8870\u843d\u73af\u5883\u4e2d\u7684\u6027\u80fd\u548c\u53ef\u9760\u6027\uff0c\u4f46\u8fd9\u4e5f\u5bfc\u81f4\u4e86\u66f4\u9ad8\u7684\u4f20\u8f93\u65f6\u5ef6\u3002\u56e0\u6b64\uff0c\u9009\u62e9\u54ea\u79cd\u6280\u672f\u53d6\u51b3\u4e8e\u5177\u4f53\u7684\u5e94\u7528\u9700\u6c42\u548c\u73af\u5883\u6761\u4ef6<\/p>\n","protected":false},"author":1,"featured_media":97371,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"default","ast-global-header-display":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","footnotes":""},"categories":[36],"tags":[346],"class_list":["post-98325","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-ofdm"],"_links":{"self":[{"href":"\/\/www.viralrail.com\/wp-json\/wp\/v2\/posts\/98325"}],"collection":[{"href":"\/\/www.viralrail.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"\/\/www.viralrail.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"\/\/www.viralrail.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"\/\/www.viralrail.com\/wp-json\/wp\/v2\/comments?post=98325"}],"version-history":[{"count":0,"href":"\/\/www.viralrail.com\/wp-json\/wp\/v2\/posts\/98325\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"\/\/www.viralrail.com\/wp-json\/wp\/v2\/media\/97371"}],"wp:attachment":[{"href":"\/\/www.viralrail.com\/wp-json\/wp\/v2\/media?parent=98325"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"\/\/www.viralrail.com\/wp-json\/wp\/v2\/categories?post=98325"},{"taxonomy":"post_tag","embeddable":true,"href":"\/\/www.viralrail.com\/wp-json\/wp\/v2\/tags?post=98325"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}