{"id":97391,"date":"2024-09-02T15:11:29","date_gmt":"2024-09-02T07:11:29","guid":{"rendered":"https:\/\/www.techphant.cn\/?p=97391"},"modified":"2024-09-02T15:11:35","modified_gmt":"2024-09-02T07:11:35","slug":"zjpffyojsjs","status":"publish","type":"post","link":"https:\/\/www.techphant.cn\/blog\/97391.html","title":{"rendered":"\u6b63\u4ea4\u9891\u5206\u590d\u7528OFDM\u6280\u672f\u4ecb\u7ecd"},"content":{"rendered":"\n<p>\u3000\u3000<strong>\u6b63\u4ea4\u9891\u5206\u590d\u7528(Orthogonal Frequency Division Multiplexing\uff0cOFDM)<\/strong>\u662f\u4e00\u79cd\u591a\u8f7d\u6ce2\u8c03\u5236\u6280\u672f\uff0c\u5e7f\u6cdb\u5e94\u7528\u4e8e\u73b0\u4ee3\u901a\u4fe1\u7cfb\u7edf\u4e2d\uff0c\u5305\u62ec\u6570\u5b57\u89c6\u9891\u5e7f\u64ad\u3001\u65e0\u7ebf\u5c40\u57df\u7f51(WLAN)\u3001\u8702\u7a9d\u79fb\u52a8\u901a\u4fe1\u7cfb\u7edf\u7b49\u3002OFDM\u6280\u672f\u901a\u8fc7\u5c06\u9ad8\u901f\u6570\u636e\u6d41\u5206\u5272\u6210\u591a\u4e2a\u4f4e\u901f\u7387\u5e76\u884c\u5b50\u6d41\uff0c\u5e76\u5c06\u8fd9\u4e9b\u5b50\u6d41\u5206\u522b\u8c03\u5236\u5230\u591a\u4e2a\u6b63\u4ea4\u5b50\u8f7d\u6ce2\u4e0a\uff0c\u4ece\u800c\u5b9e\u73b0\u9ad8\u6548\u7684\u6570\u636e\u4f20\u8f93\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u3000\u3000\u4e00\u3001 \u6b63\u4ea4\u9891\u5206\u590d\u7528OFDM\u7b80\u4ecb<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">\u3000\u30001. \u57fa\u672c\u539f\u7406<\/h3>\n\n\n\n<p>\u3000\u3000<strong>OFDM\u6280\u672f<\/strong>\u7684\u6838\u5fc3\u5728\u4e8e\u5c06\u9891\u8c31\u5212\u5206\u4e3a\u591a\u4e2a\u6b63\u4ea4\u5b50\u8f7d\u6ce2\uff0c\u6bcf\u4e2a\u5b50\u8f7d\u6ce2\u72ec\u7acb\u4f20\u8f93\u6570\u636e\uff0c\u4ece\u800c\u907f\u514d\u4e86\u5b50\u8f7d\u6ce2\u4e4b\u95f4\u7684\u5e72\u6270\u3002\u5177\u4f53\u6765\u8bf4\uff0cOFDM\u7cfb\u7edf\u5c06\u9ad8\u901f\u4e32\u884c\u6570\u636e\u6d41\u901a\u8fc7\u79bb\u6563\u5085\u91cc\u53f6\u53d8\u6362(DFT)\u8f6c\u6362\u4e3a\u9891\u57df\u4fe1\u53f7\uff0c\u7136\u540e\u901a\u8fc7\u5feb\u901f\u5085\u91cc\u53f6\u53d8\u6362(FFT)\u5c06\u8fd9\u4e9b\u4fe1\u53f7\u5206\u914d\u5230\u5404\u4e2a\u6b63\u4ea4\u5b50\u8f7d\u6ce2\u4e0a\u3002\u63a5\u6536\u7aef\u5219\u901a\u8fc7\u9006\u79bb\u6563\u5085\u91cc\u53f6\u53d8\u6362(IDFT)\u548c\u5feb\u901f\u5085\u91cc\u53f6\u53cd\u53d8\u6362(IFFT)\u5c06\u63a5\u6536\u5230\u7684\u4fe1\u53f7\u6062\u590d\u4e3a\u65f6\u57df\u4fe1\u53f7\uff0c\u5e76\u8fdb\u884c\u89e3\u8c03\u548c\u89e3\u7801\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u3000\u30002. \u6280\u672f\u4f18\u52bf<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u3000\u3000<strong>\u6297\u591a\u5f84\u8870\u843d<\/strong>\uff1aOFDM\u6280\u672f\u901a\u8fc7\u6b63\u4ea4\u6027\u51cf\u5c11\u4e86\u591a\u5f84\u6548\u5e94\u5f15\u8d77\u7684\u7b26\u53f7\u95f4\u5e72\u6270(ISI)\uff0c\u4ece\u800c\u63d0\u9ad8\u4e86\u4fe1\u53f7\u7684\u6297\u5e72\u6270\u80fd\u529b\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u9891\u8c31\u6548\u7387\u9ad8<\/strong>\uff1a\u7531\u4e8e\u5b50\u8f7d\u6ce2\u7684\u6b63\u4ea4\u6027\uff0cOFDM\u80fd\u591f\u5145\u5206\u5229\u7528\u9891\u8c31\u8d44\u6e90\uff0c\u63d0\u9ad8\u9891\u8c31\u5229\u7528\u7387\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u652f\u6301\u591a\u7528\u6237\u63a5\u5165<\/strong>\uff1aOFDM\u6280\u672f\u53ef\u4ee5\u652f\u6301\u591a\u4e2a\u7528\u6237\u540c\u65f6\u5728\u540c\u4e00\u4e2a\u9891\u6bb5\u5185\u901a\u4fe1\uff0c\u9002\u7528\u4e8e\u8702\u7a9d\u79fb\u52a8\u901a\u4fe1\u7cfb\u7edf\u4e2d\u7684\u591a\u7528\u6237\u63a5\u5165\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u9ad8\u901f\u6570\u636e\u4f20\u8f93<\/strong>\uff1aOFDM\u80fd\u591f\u5b9e\u73b0\u9ad8\u901f\u6570\u636e\u4f20\u8f93\uff0c\u9002\u7528\u4e8e\u6570\u5b57\u89c6\u9891\u5e7f\u64ad\u3001\u5bbd\u5e26\u65e0\u7ebf\u63a5\u5165\u7b49\u9ad8\u5e26\u5bbd\u9700\u6c42\u7684\u5e94\u7528\u573a\u666f\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u3000\u30003. \u5b9e\u73b0\u65b9\u6cd5<\/h3>\n\n\n\n<p>\u3000\u3000OFDM\u7684\u5b9e\u73b0\u901a\u5e38\u5305\u62ec\u4ee5\u4e0b\u51e0\u4e2a\u6b65\u9aa4\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u3000\u3000<strong>\u6570\u636e\u9884\u5904\u7406<\/strong>\uff1a\u5305\u62ec\u6270\u7801\u548c\u4ea4\u7ec7\u7f16\u7801\uff0c\u4ee5\u589e\u52a0\u6570\u636e\u7684\u53ef\u9760\u6027\u6216\u51cf\u5c11\u566a\u58f0\u5e72\u6270\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u8c03\u5236<\/strong>\uff1a\u5c06\u7f16\u7801\u540e\u7684\u6bd4\u7279\u6d41\u8c03\u5236\u6210\u540c\u76f8\u548c\u6b63\u4ea4\u4fe1\u53f7\uff0c\u5e76\u901a\u8fc7IFFT\u5904\u7406\u5f62\u6210OFDM\u7b26\u53f7\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u52a0\u7a97\u548c\u6570\u6a21\u8f6c\u6362<\/strong>\uff1a\u5bf9\u4fe1\u53f7\u8fdb\u884c\u52a0\u7a97\u5904\u7406\uff0c\u5e76\u8fdb\u884c\u6570\u6a21\u8f6c\u6362\uff0c\u5b8c\u6210\u53d1\u5c04\u8fc7\u7a0b\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u63a5\u6536\u5904\u7406<\/strong>\uff1a\u5305\u62ec\u81ea\u52a8\u589e\u76ca\u63a7\u5236\u3001\u6062\u590d\u65f6\u949f\u3001\u4f30\u8ba1\u8f7d\u6ce2\u9891\u7387\u504f\u79fb\u548c\u4fe1\u9053\u8865\u507f\u7b49\u6b65\u9aa4\uff0c\u5e76\u4f7f\u7528\u8bad\u7ec3\u5e8f\u5217\u6765\u4f30\u8ba1\u5b9a\u65f6\u3001\u9891\u7387\u504f\u5dee\u548c\u4fe1\u9053\u72b6\u6001\u4fe1\u606f\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u89e3\u8c03\u548c\u89e3\u7801<\/strong>\uff1a\u4fe1\u53f7\u7ecf\u8fc7\u89e3\u8c03\u3001\u89e3\u4ea4\u7ec7\u548c\u4fe1\u9053\u89e3\u7801\u7b49\u6b65\u9aa4\uff0c\u5b9e\u73b0\u63a5\u6536\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u3000\u30004. \u5e94\u7528\u9886\u57df<\/h3>\n\n\n\n<p>\u3000\u3000OFDM\u6280\u672f\u5728\u591a\u4e2a\u9886\u57df\u5f97\u5230\u4e86\u5e7f\u6cdb\u5e94\u7528\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u3000\u3000<strong>\u6570\u5b57\u89c6\u9891\u5e7f\u64ad<\/strong>\uff1a\u5982DVB-T\u3001DVB-C\u7b49\u6807\u51c6\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u65e0\u7ebf\u5c40\u57df\u7f51<\/strong>\uff1a\u5982IEEE 802.11a\u3001IEEE 802.11g\u7b49\u6807\u51c6\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u8702\u7a9d\u79fb\u52a8\u901a\u4fe1\u7cfb\u7edf<\/strong>\uff1a\u5982LTE\u3001LTE-Advanced\u7b49\u6807\u51c6\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u6c34\u58f0\u901a\u4fe1<\/strong>\uff1a\u7531\u4e8e\u5176\u5f3a\u5927\u7684\u6297\u591a\u5f84\u8870\u843d\u80fd\u529b\uff0cOFDM\u5728\u6c34\u58f0\u901a\u4fe1\u4e2d\u4e5f\u5f97\u5230\u4e86\u5e94\u7528\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u3000\u30005. \u5c40\u9650\u6027<\/h3>\n\n\n\n<p>\u3000\u3000\u5c3d\u7ba1OFDM\u6280\u672f\u5177\u6709\u8bf8\u591a\u4f18\u52bf\uff0c\u4f46\u4e5f\u5b58\u5728\u4e00\u4e9b\u5c40\u9650\u6027\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u3000\u3000<strong>\u5cf0\u5747\u529f\u7387\u6bd4\uff08PAPR\uff09\u9ad8<\/strong>\uff1aOFDM\u4fe1\u53f7\u7684\u5cf0\u503c\u529f\u7387\u8fdc\u9ad8\u4e8e\u5e73\u5747\u529f\u7387\uff0c\u8fd9\u4f1a\u5bfc\u81f4\u529f\u7387\u653e\u5927\u5668\u7684\u975e\u7ebf\u6027\u5931\u771f\uff0c\u5f71\u54cd\u7cfb\u7edf\u6027\u80fd\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u9891\u7387\u5b9a\u4f4d\u95ee\u9898<\/strong>\uff1aOFDM\u7cfb\u7edf\u9700\u8981\u7cbe\u786e\u7684\u9891\u7387\u548c\u65f6\u5e8f\u4f30\u8ba1\uff0c\u4ee5\u786e\u4fdd\u5b50\u8f7d\u6ce2\u4e4b\u95f4\u7684\u6b63\u4ea4\u6027\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u3000\u3000\u6b63\u4ea4\u9891\u5206\u590d\u7528(OFDM)\u6280\u672f\u901a\u8fc7\u591a\u8f7d\u6ce2\u8c03\u5236\u5b9e\u73b0\u4e86\u9ad8\u6548\u7684\u9891\u8c31\u5229\u7528\u548c\u5f3a\u5927\u7684\u6297\u5e72\u6270\u80fd\u529b\uff0c\u5e7f\u6cdb\u5e94\u7528\u4e8e\u73b0\u4ee3\u901a\u4fe1\u7cfb\u7edf\u4e2d\u3002\u7136\u800c\uff0c\u5176\u9ad8PAPR\u548c\u9891\u7387\u5b9a\u4f4d\u95ee\u9898\u4ecd\u9700\u8fdb\u4e00\u6b65\u4f18\u5316\u548c\u6539\u8fdb\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u3000\u3000\u4e8c\u3001 OFDM\u6280\u672f\u5982\u4f55\u89e3\u51b3\u9ad8\u5cf0\u5747\u529f\u7387\u6bd4(PAPR)\u95ee\u9898?<\/h2>\n\n\n\n<p>\u3000\u3000OFDM(\u6b63\u4ea4\u9891\u5206\u590d\u7528)\u6280\u672f\u5728\u9ad8\u901f\u6570\u636e\u4f20\u8f93\u4e2d\u5e7f\u6cdb\u5e94\u7528\uff0c\u4f46\u5176\u9ad8\u5cf0\u5747\u529f\u7387\u6bd4(PAPR)\u95ee\u9898\u4e00\u76f4\u662f\u9650\u5236\u5176\u5e94\u7528\u7684\u4e00\u4e2a\u4e3b\u8981\u969c\u788d\u3002PAPR\u8fc7\u9ad8\u4f1a\u5bfc\u81f4\u529f\u7387\u653e\u5927\u5668(HPA)\u548c\u6a21\u6570\u8f6c\u6362\u5668(ADC)\u7b49\u8bbe\u5907\u5de5\u4f5c\u5728\u975e\u7ebf\u6027\u533a\u57df\uff0c\u4ece\u800c\u5f15\u8d77\u5e26\u5185\u5931\u771f\u548c\u5e26\u5916\u8f90\u5c04\uff0c\u964d\u4f4e\u7cfb\u7edf\u6548\u7387\u548c\u6bd4\u7279\u8bef\u7801\u7387(BER)\u3002<\/p>\n\n\n\n<p>\u3000\u3000\u4e3a\u4e86\u89e3\u51b3PAPR\u95ee\u9898\uff0c\u7814\u7a76\u8005\u4eec\u63d0\u51fa\u4e86\u591a\u79cd\u65b9\u6cd5\u3002\u4ee5\u4e0b\u662f\u51e0\u79cd\u4e3b\u8981\u7684\u89e3\u51b3\u65b9\u6848\uff1a<\/p>\n\n\n\n<p>\u3000\u3000PTS\u6280\u672f\u901a\u8fc7\u5c06\u8f93\u5165\u6570\u636e\u5206\u5272\u6210\u82e5\u5e72\u5b50\u5757\uff0c\u5e76\u5bf9\u6bcf\u4e2a\u5b50\u5757\u65bd\u52a0\u76f8\u4f4d\u65cb\u8f6c\u56e0\u5b50\uff0c\u7136\u540e\u91cd\u65b0\u7ec4\u5408\u8fd9\u4e9b\u5b50\u5757\u6765\u964d\u4f4ePAPR\u3002\u8fd9\u79cd\u65b9\u6cd5\u4f9d\u8d56\u4e8e\u4e0d\u540c\u7684\u5206\u5272\u65b9\u6848\uff0c\u5982\u4f2a\u968f\u673a\u3001\u76f8\u90bb\u548c\u4ea4\u9519\u5206\u5272\u65b9\u6848\uff0c\u6bcf\u79cd\u65b9\u6848\u7684PAPR\u964d\u4f4e\u6027\u80fd\u548c\u8ba1\u7b97\u590d\u6742\u5ea6\u5404\u4e0d\u76f8\u540c\u3002\u4f8b\u5982\uff0c\u901a\u8fc7\u5f15\u5165\u65b0\u7684\u5206\u5272\u65b9\u6848\uff0c\u5982\u6b63\u5f26\u548c\u4f59\u5f26\u5f62\u72b6\u4ee5\u53ca\u6df7\u5408\u4ea4\u9519\u548c\u76f8\u90bb\u65b9\u6848\uff0c\u53ef\u4ee5\u5b9e\u73b0\u6bd4\u4f20\u7edf\u76f8\u90bb\u548c\u4ea4\u9519\u5206\u5272\u65b9\u6848\u66f4\u597d\u7684PAPR\u964d\u4f4e\u6548\u679c\uff0c\u800c\u4e0d\u4f1a\u589e\u52a0\u7cfb\u7edf\u7684\u8ba1\u7b97\u590d\u6742\u5ea6\u3002<\/p>\n\n\n\n<p>\u3000\u3000SLM\u7b97\u6cd5\u901a\u8fc7\u5bf9OFDM\u7b26\u53f7\u8fdb\u884c\u9009\u62e9\u6027\u6620\u5c04\u6765\u964d\u4f4ePAPR\u3002\u5177\u4f53\u6765\u8bf4\uff0c\u7cfb\u7edf\u5728\u521d\u59cb\u5316\u9636\u6bb5\u6839\u636e\u5cf0\u5747\u6bd4\u589e\u957f\u53c2\u6570\u548c\u4fe1\u9053\u8d28\u91cf\u786e\u5b9a\u6700\u4f73\u4fee\u6b63\u4f4d\u96c6\uff0c\u751f\u6210\u591a\u4e2aOFDM\u7b26\u53f7\u5019\u9009\uff0c\u6700\u7ec8\u9009\u62e9\u5177\u6709\u6700\u4f4ePAPR\u7684\u7b26\u53f7\u4f5c\u4e3a\u8f93\u51fa\u7b26\u53f7\u3002SLM\u7b97\u6cd5\u53ef\u4ee5\u6709\u6548\u5730\u964d\u4f4ePAPR\uff0c\u4f46\u5176\u8ba1\u7b97\u590d\u6742\u5ea6\u8f83\u9ad8\u3002<\/p>\n\n\n\n<p>\u3000\u3000\u5728\u4fe1\u53f7\u88ab\u9001\u5230\u653e\u5927\u5668\u4e4b\u524d\uff0c\u5bf9\u6709\u8f83\u5927\u5cf0\u503c\u529f\u7387\u7684\u4fe1\u53f7\u8fdb\u884c\u9884\u7578\u53d8\u5904\u7406\uff0c\u4f7f\u5176\u4e0d\u4f1a\u8d85\u51fa\u653e\u5927\u5668\u7684\u52a8\u6001\u8303\u56f4\uff0c\u4ece\u800c\u964d\u4f4ePAPR\u3002<\/p>\n\n\n\n<p>\u3000\u3000\u901a\u8fc7\u5f15\u5165\u865a\u62df\u5b50\u8f7d\u6ce2\u6765\u964d\u4f4ePAPR\u3002\u8fd9\u79cd\u65b9\u6cd5\u901a\u8fc7\u5728OFDM\u7cfb\u7edf\u4e2d\u6dfb\u52a0\u865a\u62df\u5b50\u8f7d\u6ce2\uff0c\u4ece\u800c\u5206\u6563\u4fe1\u53f7\u7684\u80fd\u91cf\uff0c\u964d\u4f4ePAPR\u3002<\/p>\n\n\n\n<p>\u3000\u3000\u8fd8\u6709\u4e00\u4e9b\u5176\u4ed6\u6280\u672f\u5982\u526a\u88c1\u3001\u6ee4\u6ce2\u3001\u7f16\u7801\u6280\u672f\u548c\u51c6\u5468\u671fLDPC\u7801\u7b49\u4e5f\u88ab\u7528\u4e8e\u964d\u4f4ePAPR\u3002<\/p>\n\n\n\n<p>\u3000\u3000\u8fd9\u4e9b\u65b9\u6cd5\u5404\u6709\u4f18\u7f3a\u70b9\uff0c\u9009\u62e9\u5408\u9002\u7684\u65b9\u6cd5\u9700\u8981\u6839\u636e\u5177\u4f53\u5e94\u7528\u573a\u666f\u548c\u7cfb\u7edf\u6027\u80fd\u8981\u6c42\u6765\u51b3\u5b9a\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u3000\u3000\u4e09\u3001 OFDM\u7cfb\u7edf\u4e2d\u9891\u7387\u5b9a\u4f4d\u95ee\u9898\u7684\u6700\u65b0\u89e3\u51b3\u65b9\u6848\u662f\u4ec0\u4e48?<\/h2>\n\n\n\n<p>\u3000\u3000\u5728OFDM\u7cfb\u7edf\u4e2d\uff0c\u9891\u7387\u5b9a\u4f4d\u95ee\u9898\u7684\u6700\u65b0\u89e3\u51b3\u65b9\u6848\u4e3b\u8981\u96c6\u4e2d\u5728\u8f7d\u6ce2\u9891\u7387\u504f\u79fb(CFO)\u7684\u4f30\u8ba1\u548c\u8ddf\u8e2a\u4e0a\u3002\u6839\u636e\u6700\u65b0\u7684\u7814\u7a76\u548c\u62a5\u544a\uff0c\u6709\u51e0\u79cd\u4e0d\u540c\u7684\u65b9\u6cd5\u88ab\u63d0\u51fa\u4ee5\u89e3\u51b3\u8fd9\u4e00\u95ee\u9898\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u3000\u3000<strong>\u57fa\u4e8e\u65f6\u57df\u5185\u63d2\u6cd5\u548c\u5faa\u73af\u524d\u7f00\u7684\u4f30\u6d4b\u65b9\u6cd5<\/strong>\uff1a\u8fd9\u79cd\u65b9\u6cd5\u5728\u8f7d\u9891\u6355\u83b7\u9636\u6bb5\u91c7\u7528\u65f6\u57df\u5185\u63d2\u5165\u7b49\u503c\u5bfc\u9891\u7684\u65b9\u6cd5\uff0c\u800c\u5728\u8f7d\u9891\u8ddf\u8e2a\u9636\u6bb5\u5229\u7528\u5faa\u73af\u524d\u7f00\u6765\u4f30\u8ba1\u9891\u7387\u504f\u79fb\u5e76\u8fdb\u884c\u6821\u6b63\u3002\u8fd9\u79cd\u65b9\u6cd5\u4e0d\u4ec5\u4f30\u8ba1\u8303\u56f4\u5927\uff0c\u800c\u4e14\u4f30\u8ba1\u503c\u51c6\u786e\uff0c\u7ecf\u8fc7\u6821\u6b63\u540e\u7684\u7cfb\u7edf\u6027\u80fd\u80fd\u8fbe\u5230\u4fe1\u9053\u7406\u60f3\u4f30\u8ba1\u6761\u4ef6\u4e0b\u7684\u8bef\u6bd4\u7279\u7387\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u76f8\u4f4d\u8865\u507f\u6280\u672f<\/strong>\uff1a\u5728\u65b0\u65e0\u7ebf\u7535(NR)\u4e2d\u5f15\u5165\u7684\u76f8\u4f4d\u8865\u507f\u6280\u672f\uff0c\u901a\u8fc7\u5728\u4f20\u8f93\u5668\u548c\u63a5\u6536\u5668\u4e2d\u5206\u522b\u5e94\u7528\u76f8\u4f4d\u9884\u8865\u507f\u9879\u548c\u76f8\u4f4d\u540e\u8865\u507f\u9879\u6765\u89e3\u51b3\u4e0d\u540c\u4e2d\u5fc3\u9891\u7387\u7684\u4f20\u8f93\u5668\u548c\u63a5\u6536\u5668\u4e4b\u95f4\u7684\u4fe1\u53f7\u4e0d\u5339\u914d\u95ee\u9898\u3002\u8fd9\u79cd\u65b9\u6cd5\u53ef\u4ee5\u6709\u6548\u51cf\u5c11\u76f8\u90bbOFDM\u7b26\u53f7\u4e4b\u95f4\u7684\u76f8\u4f4d\u53d8\u5316\uff0c\u4ece\u800c\u63d0\u9ad8\u63a5\u6536\u5668\u7684\u901a\u9053\u4f30\u7b97\u548c\u9891\u7387\u8bef\u5dee\u8ddf\u8e2a\u7684\u51c6\u786e\u6027\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u57fa\u4e8e\u5bfc\u9891\u7684\u9891\u7387\u8ddf\u8e2a\u7b97\u6cd5<\/strong>\uff1a\u5728OFDM\u7cfb\u7edf\u4e2d\uff0c\u53ef\u4ee5\u91c7\u7528\u5bfc\u9891\u4fe1\u53f7\u8fdb\u884c\u8f7d\u6ce2\u9891\u7387\u4f30\u8ba1\u548c\u6821\u6b63\u3002\u8fd9\u79cd\u65b9\u6cd5\u901a\u8fc7\u5728\u6bcf\u4e2aOFDM\u7b26\u53f7\u4e2d\u5f15\u5165\u5bfc\u9891\u4fe1\u53f7\uff0c\u6765\u4f30\u8ba1\u4fe1\u53f7\u4f20\u8f93\u9047\u5230\u7684\u65f6\u95f4\u504f\u79fb\u548c\u9891\u7387\u504f\u79fb\uff0c\u4ece\u800c\u5b9e\u73b0\u9891\u7387\u7684\u7cbe\u786e\u8ddf\u8e2a\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u57fa\u4e8e\u795e\u7ecf\u7f51\u7edc\u7684\u7cbe\u786e\u88ab\u52a8\u5b9a\u4f4d\u6280\u672f<\/strong>\uff1a\u5229\u7528OFDM\u4e2d\u7684\u4fe1\u9053\u72b6\u6001\u4fe1\u606f(CSI)\u5efa\u7acb\u4f20\u64ad\u6a21\u578b\uff0c\u5e76\u7ed3\u5408\u9891\u7387\u5206\u96c6\u548c\u591a\u5929\u7ebf\u6280\u672f\uff0c\u7528\u4e8e\u5ba4\u5185\u4f4d\u7f6e\u6307\u7eb9\u8bc6\u522b\u3002\u8fd9\u79cd\u65b9\u6cd5\u901a\u8fc7\u6df1\u5ea6\u5b66\u4e60\u548c\u795e\u7ecf\u7f51\u7edc\u6280\u672f\uff0c\u63d0\u9ad8\u4e86\u9891\u7387\u5b9a\u4f4d\u7684\u7cbe\u5ea6\u548c\u53ef\u9760\u6027\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u57fa\u4e8e\u7cbe\u786e\u4f20\u64ad\u5ef6\u8fdf\u6d4b\u91cf\u7684\u65b9\u6cd5<\/strong>\uff1a\u901a\u8fc7\u6d4b\u91cfOFDM\u4fe1\u53f7\u7684\u4f20\u64ad\u5ef6\u8fdf\u6765\u5b9e\u73b0\u9891\u7387\u548c\u65f6\u5e8f\u540c\u6b65\u3002\u8fd9\u79cd\u65b9\u6cd5\u7ed3\u5408\u4e86802.22\u6807\u51c6\u548c\u5730\u7406\u7a7a\u95f4\u5206\u6790\uff0c\u80fd\u591f\u63d0\u9ad8OFDM\u7cfb\u7edf\u7684\u6027\u80fd\u548c\u53ef\u9760\u6027\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u3000\u3000\u6700\u65b0\u7684\u89e3\u51b3\u65b9\u6848\u4e3b\u8981\u96c6\u4e2d\u5728\u5229\u7528\u5bfc\u9891\u4fe1\u53f7\u3001\u76f8\u4f4d\u8865\u507f\u6280\u672f\u3001\u795e\u7ecf\u7f51\u7edc\u4ee5\u53ca\u7cbe\u786e\u4f20\u64ad\u5ef6\u8fdf\u6d4b\u91cf\u7b49\u65b9\u6cd5\u6765\u5b9e\u73b0OFDM\u7cfb\u7edf\u4e2d\u9891\u7387\u5b9a\u4f4d\u95ee\u9898\u7684\u9ad8\u6548\u89e3\u51b3\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u3000\u3000\u56db\u3001 \u5728\u6570\u5b57\u89c6\u9891\u5e7f\u64ad\u4e2d\uff0cOFDM\u6280\u672f\u4e0e\u5176\u4ed6\u8c03\u5236\u6280\u672f\u76f8\u6bd4\u7684\u4f18\u52bf\u548c\u52a3\u52bf\u662f\u4ec0\u4e48?<\/h2>\n\n\n\n<p>\u3000\u3000\u5728\u6570\u5b57\u89c6\u9891\u5e7f\u64ad\u4e2d\uff0cOFDM(\u6b63\u4ea4\u9891\u5206\u590d\u7528)\u6280\u672f\u76f8\u8f83\u4e8e\u5176\u4ed6\u8c03\u5236\u6280\u672f\u5177\u6709\u663e\u8457\u7684\u4f18\u52bf\u548c\u52a3\u52bf\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u3000\u30001. \u4f18\u52bf\uff1a<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u3000\u3000<strong>\u6297\u591a\u5f84\u5e72\u6270\u80fd\u529b\u5f3a<\/strong>\uff1aOFDM\u6280\u672f\u80fd\u591f\u6709\u6548\u5e94\u5bf9\u591a\u5f84\u4f20\u64ad\u95ee\u9898\uff0c\u901a\u8fc7\u5c06\u4fe1\u53f7\u5206\u6210\u591a\u4e2a\u5b50\u8f7d\u6ce2\u5e76\u540c\u65f6\u4f20\u8f93\uff0c\u53ef\u4ee5\u51cf\u5c11ISI(\u7b26\u53f7\u95f4\u5e72\u6270)\u548cICI(\u8f7d\u6ce2\u95f4\u5e72\u6270)\uff0c\u4ece\u800c\u63d0\u9ad8\u4fe1\u53f7\u7684\u4f20\u8f93\u8d28\u91cf\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u9891\u8c31\u6548\u7387\u9ad8<\/strong>\uff1aOFDM\u901a\u8fc7\u5c06\u4fe1\u53f7\u5206\u6210\u591a\u4e2a\u5b50\u8f7d\u6ce2\uff0c\u53ef\u4ee5\u5145\u5206\u5229\u7528\u9891\u7387\u9009\u62e9\u6027\u8870\u843d\u4ea7\u751f\u7684\u5404\u4e2a\u4e0d\u540c\u5bb9\u91cf\u7684\u5b50\u4fe1\u9053\uff0c\u4ece\u800c\u63d0\u9ad8\u9891\u8c31\u5229\u7528\u7387\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u6297\u5e72\u6270\u80fd\u529b\u5f3a<\/strong>\uff1aOFDM\u53ef\u4ee5\u5728\u5b50\u4fe1\u9053\u4e0a\u4f7f\u7528\u8f83\u4f4e\u7684\u5e26\u5bbd\u6765\u62b5\u6d88\u5e26\u5bbd\u6709\u9650\u7684\u5e72\u6270\u4fe1\u53f7\uff0c\u63d0\u9ad8\u4fe1\u53f7\u7684\u4f20\u8f93\u8d28\u91cf\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u5e26\u5bbd\u6269\u5c55\u6027\u5f3a<\/strong>\uff1aOFDM\u7cfb\u7edf\u7684\u4fe1\u53f7\u5e26\u5bbd\u53d6\u51b3\u4e8e\u4f7f\u7528\u7684\u5b50\u8f7d\u6ce2\u6570\u91cf\uff0c\u51e0\u767ekHz\u5230\u51e0\u767eMHz\u90fd\u8f83\u5bb9\u6613\u5b9e\u73b0\uff0cFFT\u5c3a\u5bf8\u5e26\u6765\u7684\u7cfb\u7edf\u590d\u6742\u5ea6\u589e\u52a0\u76f8\u5bf9\u5e76\u4e0d\u660e\u663e\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u6297\u9009\u62e9\u6027\u8870\u51cf<\/strong>\uff1aOFDM\u5177\u6709\u8f83\u5f3a\u7684\u6297\u9009\u62e9\u6027\u8870\u51cf\u80fd\u529b\uff0c\u80fd\u591f\u63d0\u9ad8\u4fe1\u53f7\u5728\u6076\u52a3\u73af\u5883\u4e0b\u7684\u4f20\u8f93\u8d28\u91cf\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u7b80\u5316\u4fe1\u9053\u5747\u8861\u5316<\/strong>\uff1aOFDM\u901a\u8fc7\u5728\u9891\u7387\u57df\u8fdb\u884c\u5904\u7406\uff0c\u7b80\u5316\u4e86\u4fe1\u9053\u5747\u8861\u5316\u8fc7\u7a0b\uff0c\u89e3\u51b3\u4e86\u5355\u8f7d\u6ce2QAM\u8c03\u5236\u6280\u672f\u4e2d\u7684\u8bb8\u591a\u590d\u6742\u6027\u95ee\u9898\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u9ad8\u6548\u7684\u8c03\u5236\u548c\u89e3\u8c03<\/strong>\uff1aOFDM\u53ef\u4ee5\u4e0e\u667a\u80fd\u5929\u7ebf\u3001MIMO\u7cfb\u7edf\u548c\u7a7a\u95f4\u65f6\u95f4\u7f16\u7801\u7b49\u6280\u672f\u76f8\u7ed3\u5408\uff0c\u4f7f\u5176\u6210\u4e3a\u4e00\u79cd\u591a\u529f\u80fd\u7684\u6570\u5b57\u8c03\u5236\u65b9\u6848\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u3000\u30002. \u52a3\u52bf\uff1a<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u3000\u3000<strong>\u5bf9\u9891\u7387\u504f\u79fb\u654f\u611f<\/strong>\uff1a\u7531\u4e8eOFDM\u4f7f\u7528\u5927\u91cf\u5b50\u8f7d\u6ce2\uff0c\u5bf9\u9891\u7387\u51c6\u786e\u6027\u7684\u8981\u6c42\u975e\u5e38\u9ad8\uff0c\u9891\u7387\u504f\u5dee\u4f1a\u5f15\u8d77\u5b50\u8f7d\u6ce2\u95f4\u5e72\u6270\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u9ad8\u5cf0\u5747\u6bd4\uff08PAPR\uff09\u95ee\u9898<\/strong>\uff1aOFDM\u4fe1\u53f7\u7684\u9ad8PAPR\u4f1a\u5bfc\u81f4\u5728\u9ad8\u529f\u7387\u653e\u5927\u5668(HPA)\u4e2d\u7684\u975e\u7ebf\u6027\u5931\u771f\u548c\u5e26\u5916\u8f90\u5c04\uff0c\u964d\u4f4e\u7cfb\u7edf\u7684\u6548\u7387\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u7cfb\u7edf\u590d\u6742\u5ea6\u9ad8<\/strong>\uff1a\u5c3d\u7ba1OFDM\u7684FFT\u5c3a\u5bf8\u5e26\u6765\u7684\u7cfb\u7edf\u590d\u6742\u5ea6\u589e\u52a0\u76f8\u5bf9\u5e76\u4e0d\u660e\u663e\uff0c\u4f46\u5176\u6574\u4f53\u7cfb\u7edf\u590d\u6742\u5ea6\u4ecd\u7136\u8f83\u9ad8\u3002<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\u3000\u3000\u4e94\u3001 OFDM\u6280\u672f\u5728\u8702\u7a9d\u79fb\u52a8\u901a\u4fe1\u7cfb\u7edf\u4e2d\u7684\u6700\u65b0\u5e94\u7528\u8fdb\u5c55\u6709\u54ea\u4e9b?<\/h2>\n\n\n\n<p>\u3000\u3000OFDM(\u6b63\u4ea4\u9891\u5206\u590d\u7528)\u6280\u672f\u5728\u8702\u7a9d\u79fb\u52a8\u901a\u4fe1\u7cfb\u7edf\u4e2d\u7684\u6700\u65b0\u5e94\u7528\u8fdb\u5c55\u4e3b\u8981\u4f53\u73b0\u5728\u4ee5\u4e0b\u51e0\u4e2a\u65b9\u9762\uff1a<\/p>\n\n\n\n<p>\u3000\u3000OFDM\u6280\u672f\u57284G\u8702\u7a9d\u7cfb\u7edf\u4e2d\u5f97\u5230\u4e86\u5e7f\u6cdb\u5e94\u7528\uff0c\u7279\u522b\u662f\u5728\u7a7a\u4e2d\u63a5\u53e3\u7684\u8bbe\u8ba1\u4e2d\uff0cOFDM\u6280\u672f\u56e0\u5176\u5728\u5bf9\u6297\u591a\u5f84\u8870\u5f31\u65b9\u9762\u7684\u663e\u8457\u4f18\u52bf\u800c\u88ab\u91c7\u7528\u3002\u4f8b\u5982\uff0c\u65e5\u672cNTT DoCoMo\u548c\u4e2d\u56fd\u7684FuTURE\u65b9\u6848\u90fd\u91c7\u7528\u4e86OFDM\u6280\u672f\uff0c\u663e\u8457\u63d0\u9ad8\u4e86\u7cfb\u7edf\u7684\u6027\u80fd\u3002<\/p>\n\n\n\n<p>\u3000\u3000\u57285G\u8702\u7a9d\u7cfb\u7edf\u4e2d\uff0cOFDM\u6280\u672f\u4ecd\u7136\u662f\u5173\u952e\u6280\u672f\u4e4b\u4e00\u3002\u4e0eOFDM\u6280\u672f\u76f8\u6bd4\uff0cOQAM-OFDM\u6280\u672f\u5177\u6709\u66f4\u4f4e\u7684\u5e26\u5916\u9891\u8c31\u6cc4\u9732\uff0c\u56e0\u6b64\u6210\u4e3a5G\u5173\u952e\u6280\u672f\u7684\u91cd\u8981\u7ec4\u6210\u90e8\u5206\u3002\u6b64\u5916\uff0c\u57fa\u4e8eOFDM\u7684\u591a\u8f7d\u6ce2\u6570\u5b57\u8c03\u5236\u6280\u672f\u4e5f\u88ab\u89c6\u4e3a\u672a\u6765\u65e0\u7ebf\u5bbd\u5e26\u63a5\u5165\u7cfb\u7edf\u548c\u4e0b\u4e00\u4ee3\u8702\u7a9d\u79fb\u52a8\u7f51\u7edc\u65e0\u7ebf\u63a5\u5165\u6280\u672f\u7684\u57fa\u672c\u5b9e\u73b0\u65b9\u5f0f\u3002<\/p>\n\n\n\n<p>\u3000\u3000OFDM\u4f5c\u4e3a\u4e00\u79cd\u591a\u8f7d\u6ce2\u4f20\u8f93\u6280\u672f\uff0c\u8fd1\u5e74\u6765\u5728\u8bb8\u591a\u9ad8\u901f\u4fe1\u606f\u4f20\u8f93\u9886\u57df\u5f97\u5230\u4e86\u5e7f\u6cdb\u5e94\u7528\uff0c\u5e76\u4e14\u6709\u53ef\u80fd\u6210\u4e3a\u4e0b\u4e00\u4ee3\u8702\u7a9d\u79fb\u52a8\u901a\u4fe1\u7cfb\u7edf\u7684\u6838\u5fc3\u6280\u672f\u3002<\/p>\n\n\n\n<p>\u3000\u3000OFDM\u6280\u672f\u8fd8\u88ab\u7528\u4e8e\u591a\u79cd\u591a\u5740\u63a5\u5165\u65b9\u6848\uff0c\u5982OFDMA(\u6b63\u4ea4\u9891\u5206\u591a\u5740\u63a5\u5165)\u3001MC-CDMA(\u591a\u8f7d\u6ce2-\u7801\u5206\u591a\u5740\u63a5\u5165)\u548cMC-DS-CDMA(\u591a\u8f7d\u6ce2-\u76f4\u63a5\u5e8f\u5217-\u7801\u5206\u591a\u5740\u63a5\u5165)\u7b49\u3002\u8fd9\u4e9b\u65b9\u6848\u901a\u8fc7\u5206\u914d\u4e0d\u540c\u6570\u76ee\u7684\u5b50\u8f7d\u6ce2\u7ed9\u4e0d\u540c\u5e26\u5bbd\u7684\u7528\u6237\uff0c\u5b9e\u73b0\u4e86\u9ad8\u6548\u7684\u9891\u8c31\u5229\u7528\u3002<\/p>\n\n\n\n<p>\u3000\u3000\u5728\u5bbd\u5e26\u8702\u7a9d\u79fb\u52a8\u901a\u4fe1\u7cfb\u7edf\u4e2d\uff0c\u57fa\u4e8eOFDM\u7684\u7269\u7406\u5c42\u8bbe\u8ba1\u5df2\u7ecf\u5f97\u5230\u4e86\u5b9e\u9a8c\u9a8c\u8bc1\uff0c\u8868\u660e\u5176\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\u7684\u6709\u6548\u6027\u3002<\/p>\n\n\n\n<p>\u3000\u3000OFDM\u6280\u672f\u5728\u8702\u7a9d\u7cfb\u7edf\u4e0b\u884c\u94fe\u8def\u4e2d\u7684\u5e94\u7528\u4e5f\u5f97\u5230\u4e86\u7814\u7a76\uff0c\u7279\u522b\u662f\u7ed3\u5408\u9ad8\u901f\u6570\u636e\u5305\u63a5\u5165(HSDPA)\u7684\u4f20\u8f93\u65b9\u6848\uff0c\u8fdb\u4e00\u6b65\u63d0\u5347\u4e86\u7cfb\u7edf\u7684\u4f20\u8f93\u6548\u7387\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u3000\u3000\u516d\u3001 OFDM\u6280\u672f\u5728\u6c34\u58f0\u901a\u4fe1\u9886\u57df\u7684\u5e94\u7528<\/h2>\n\n\n\n<p>\u3000\u3000OFDM(\u6b63\u4ea4\u9891\u5206\u590d\u7528)\u6280\u672f\u5728\u6c34\u58f0\u901a\u4fe1\u9886\u57df\u7684\u5e94\u7528\u5df2\u7ecf\u53d6\u5f97\u4e86\u663e\u8457\u7684\u8fdb\u5c55\u548c\u6548\u679c\u3002\u4ee5\u4e0b\u662f\u57fa\u4e8e\u73b0\u6709\u8d44\u6599\u7684\u8be6\u7ec6\u5206\u6790\u548c\u6848\u4f8b\u8bc4\u4f30\uff1a<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u3000\u30001. \u5e94\u7528\u6848\u4f8b<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u3000\u3000<strong>\u6c34\u6c60\u5b9e\u9a8c<\/strong>\uff1a\u5728\u6c34\u6c60\u5b9e\u9a8c\u4e2d\uff0c\u901a\u8fc7\u91c7\u7528CCS\u8f6f\u4ef6\u8fdb\u884c\u6570\u636e\u6536\u53d1\uff0c\u5b9e\u73b0\u4e86\u5c0f\u8303\u56f4\u5b9e\u65f6\u7684\u6c34\u58f0\u901a\u4fe1\u3002\u8fd9\u4e00\u5b9e\u9a8c\u9a8c\u8bc1\u4e86OFDM\u6280\u672f\u5728\u6c34\u4e0b\u590d\u6742\u73af\u5883\u4e2d\u7684\u5e94\u7528\u53ef\u884c\u6027\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u6d77\u8bd5\u9a8c\u8bc1<\/strong>\uff1a\u5728\u67d0\u6b21\u6d77\u8bd5\u4e2d\uff0c\u4f7f\u7528OFDM\u6280\u672f\u89e3\u8c03\u4e867\u516c\u91cc\u8ddd\u79bb\u4e0a\u7684\u4fe1\u53f7\uff0c\u6210\u529f\u5b9e\u73b0\u4e86\u8fdc\u8ddd\u79bb\u901a\u4fe1\u3002\u8fd9\u4e00\u6848\u4f8b\u5c55\u793a\u4e86OFDM\u6280\u672f\u5728\u5b9e\u9645\u6d77\u51b5\u4e0b\u7684\u5e94\u7528\u6548\u679c\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u57fa\u4e8e\u56fd\u4ea7FPGA\u7684\u7cfb\u7edf\u8bbe\u8ba1<\/strong>\uff1a\u8bbe\u8ba1\u4e86\u57fa\u4e8eOFDM\u6280\u672f\u7684\u6c34\u58f0\u901a\u4fe1\u7cfb\u7edf\uff0c\u901a\u8fc7IFFT\/FFT\u7b97\u6cd5\u548c\u4fdd\u62a4\u95f4\u9694\u7684\u5faa\u73af\u524d\u7f00\u6765\u514b\u670d\u7801\u95f4\u5e72\u6270\uff0c\u901a\u8fc7Matlab\u4eff\u771f\u9a8c\u8bc1\u4e86\u5176\u5728\u6c34\u58f0\u901a\u4fe1\u4e2d\u7684\u6709\u6548\u6027\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u3000\u30002. \u6548\u679c\u8bc4\u4f30<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u3000\u3000<strong>\u901a\u4fe1\u901f\u7387\u548c\u53ef\u9760\u6027<\/strong>\uff1aOFDM\u6280\u672f\u901a\u8fc7\u5c06\u901a\u4fe1\u5e26\u5bbd\u5212\u5206\u4e3a\u82e5\u5e72\u4e2a\u5b50\u4fe1\u9053\uff0c\u63d0\u9ad8\u4e86\u9891\u8c31\u5229\u7528\u7387\uff0c\u5e76\u4e14\u7531\u4e8e\u5b50\u4fe1\u9053\u5728\u9891\u57df\u4e0a\u76f8\u4e92\u91cd\u53e0\uff0c\u907f\u514d\u4e86\u8f7d\u6ce2\u95f4\u5e72\u6270(ICI)\uff0c\u4ece\u800c\u663e\u8457\u63d0\u5347\u4e86\u901a\u4fe1\u901f\u7387\u548c\u53ef\u9760\u6027\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u6297\u591a\u5f84\u5e72\u6270\u80fd\u529b<\/strong>\uff1aOFDM\u6280\u672f\u80fd\u591f\u5f88\u597d\u5730\u6291\u5236\u591a\u5f84\u5ef6\u8fdf\u6240\u9020\u6210\u7684\u65f6\u95f4\u5f25\u6563\uff0c\u4ece\u800c\u5728\u4e00\u5b9a\u7a0b\u5ea6\u4e0a\u6291\u5236\u591a\u5f84\u5e72\u6270\uff0c\u8fd9\u5bf9\u4e8e\u6c34\u58f0\u901a\u4fe1\u4e2d\u590d\u6742\u7684\u591a\u5f84\u7ed3\u6784\u5c24\u4e3a\u91cd\u8981\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u9891\u8c31\u6548\u7387\u548c\u6297\u591a\u666e\u52d2\u9891\u504f<\/strong>\uff1aOFDM\u534a\u76f8\u5e72\u901a\u4fe1\u6280\u672f\u5728\u514b\u670d\u591a\u666e\u52d2\u9891\u504f\u65b9\u9762\u548c\u63d0\u5347\u9891\u8c31\u6548\u7387\u65b9\u9762\u5177\u6709\u660e\u663e\u4f18\u52bf\u3002\u5728AWGN\u4fe1\u9053\u4e0b\uff0c\u534a\u76f8\u5e72\u901a\u4fe1\u5728\u03b5>0.0007\u65f6\u514b\u670d\u591a\u666e\u52d2\u9891\u504f\u7684\u4f18\u52bf\u660e\u663e\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u81ea\u9002\u5e94\u4fe1\u9053\u4f30\u8ba1<\/strong>\uff1a\u57fa\u4e8eOFDM\u4fe1\u53f7\u7684\u81ea\u9002\u5e94\u6c34\u58f0\u4fe1\u9053\u4f30\u8ba1\u7b97\u6cd5\u80fd\u591f\u5b9e\u65f6\u8bc4\u4f30\u4fe1\u9053\u4f30\u8ba1\u6548\u679c\uff0c\u5e76\u5b9e\u73b0\u5bf9\u771f\u5b9e\u6c34\u58f0\u4fe1\u9053\u957f\u5ea6\u7684\u81ea\u9002\u5e94\u8c03\u6574\uff0c\u4ece\u800c\u63d0\u9ad8\u6709\u6548\u901a\u4fe1\u901f\u7387\u548c\u901a\u4fe1\u53ef\u9760\u6027\u3002<\/li>\n<\/ul>\n\n\n\n<h3 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