{"id":98576,"date":"2024-10-29T10:13:30","date_gmt":"2024-10-29T02:13:30","guid":{"rendered":"\/\/www.dealsbon.com\/?p=98576"},"modified":"2024-10-29T10:13:41","modified_gmt":"2024-10-29T02:13:41","slug":"wxtcmksjysmcs-2","status":"publish","type":"post","link":"\/\/www.dealsbon.com\/blog\/98576.html","title":{"rendered":"\u65e0\u7ebf\u56fe\u4f20\u6a21\u5757\u662f\u57fa\u4e8e\u4ec0\u4e48\u4f20\u8f93"},"content":{"rendered":"\n
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\u3000\u3000COFDM\u6280\u672f\u5bf9\u56fe\u50cf\u8d28\u91cf\u7684\u5f71\u54cd\u663e\u8457\u3002\u7531\u4e8e\u5176\u5353\u8d8a\u7684\u201c\u7ed5\u5c04\u201d\u548c\u201c\u7a7f\u900f\u201d\u80fd\u529b\uff0cCOFDM\u80fd\u591f\u6ee1\u8db3\u5927\u901f\u7387\u3001\u4f4e\u65f6\u5ef6\u548c\u9ad8\u53ef\u9760\u6027\u7684\u9700\u6c42\u3002\u63a5\u6536\u7aef\u56fe\u50cf\u5206\u8fa8\u7387\u53ef\u8fbe\u5230720\u00d7576\u6216720\u00d7480.\u7801\u6d41\u53ef\u4ee5\u57286M\u5de6\u53f3\uff0c\u63a5\u6536\u540e\u7684\u56fe\u50cf\u8d28\u91cf\u63a5\u8fd1DVD\u753b\u8d28\u3002\u6b64\u5916\uff0cCOFDM\u6280\u672f\u652f\u6301\u5feb\u901f\u79fb\u52a8\u4e2d\u7684\u7a33\u5b9a\u3001\u9ad8\u8d28\u91cf\u4f20\u8f93\uff0c\u9002\u7528\u4e8e\u8f66\u8f86\u3001\u8239\u8236\u3001\u76f4\u5347\u673a\/\u65e0\u4eba\u673a\u7b49\u5e73\u53f0\u3002<\/p>\n\n\n\n \u3000\u3000\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u4f8b\u5982Sihid COFDM\u9ad8\u6e05\u6570\u5b57\u65e0\u7ebf\u56fe\u4f20\u5f00\u53d1\u5957\u4ef6\uff0c\u53d1\u5c04\u7aef\u901a\u8fc7HDMI\u63a5\u53e3\u8f93\u5165\u6570\u5b57\u89c6\u9891\u4fe1\u53f7\uff0c\u7ecfH.264\u7f16\u7801\u538b\u7f29\u540e\u505aCOFDM\u8c03\u5236\uff0c\u518d\u8f6c\u6362\u4e3a\u6a21\u62df\u4fe1\u53f7\u53d1\u5c04\u3002\u63a5\u6536\u7aef\u5219\u901a\u8fc7USB\u63a5\u53e3\u5c06\u89e3\u8c03\u540e\u7684\u6570\u5b57\u89c6\u9891\u4fe1\u53f7\u4f20\u7ed9\u624b\u673a\u6216PC\u3001\u5e73\u677f\u7b49\u8bbe\u5907\u8fdb\u884c\u64ad\u653e\u3002\u8fd9\u79cd\u65b9\u6848\u4e0d\u4ec5\u652f\u6301\u591a\u79cd\u5de5\u4f5c\u65b9\u5f0f\u3001\u4fe1\u9053\u5e26\u5bbd\u3001\u661f\u5ea7\u7b49\u8bbe\u7f6e\uff0c\u8fd8\u63d0\u4f9bTF\u5361\u63a5\u53e3\u3001OSD\u63a5\u53e3\u548c\u63a7\u5236\u4e32\u53e3\u7b49\u529f\u80fd\u3002<\/p>\n\n\n\n \u3000\u3000\u6b63\u4ea4\u9891\u5206\u590d\u7528(OFDM)\u6280\u672f\u5728\u65e0\u7ebf\u56fe\u4f20\u4e2d\u7684\u5177\u4f53\u5b9e\u73b0\u65b9\u5f0f\u548c\u6027\u80fd\u8868\u73b0\u5982\u4e0b\uff1a<\/p>\n\n\n\n \u3000\u3000OFDM\u6280\u672f\u5c06\u4e32\u884c\u6570\u636e\u6d41\u8f6c\u6362\u4e3a\u5e76\u884c\u4fe1\u53f7\uff0c\u901a\u8fc7\u9006\u79bb\u6563\u5085\u91cc\u53f6\u53d8\u6362(IDFT)\u548c\u79bb\u6563\u5085\u91cc\u53f6\u53d8\u6362(DFT)\u6765\u5b9e\u73b0\u591a\u8def\u590d\u7528\u8fc7\u7a0b\u3002\u6bcf\u4e2a\u8f93\u5165\u4fe1\u53f7\u88ab\u5206\u6210\u4e24\u8def\u4fe1\u53f7\uff0c\u5373I(In-phase)\u548cQ(Quadrature)\u8def\u4fe1\u53f7\uff0c\u5e76\u5bf9\u6bcf\u4e00\u4e2a\u4fe1\u53f7\u8fdb\u884cIQ\u8c03\u5236\u3002<\/p>\n\n\n\n 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\u3000\u3000OFDM\u6280\u672f\u80fd\u591f\u5b9e\u73b0\u9ad8\u8fbe3Gbps\u7684\u4f20\u9001\u901f\u7387\u3002\u5f53\u4f7f\u752864QAM\u65f6\uff0c\u7406\u8bba\u4e0a\u539f\u59cb\u5bb9\u91cf\u53ef\u8fbe108Mbps\u3002<\/p>\n\n\n\n \u3000\u3000OFDM\u4fe1\u53f7\u4e2d\u6b63\u4ea4\u6027\u7684\u91cd\u8981\u6027\u5728\u4e8e\u5176\u51cf\u5c11\u76f8\u90bb\u4fe1\u9053\u95f4\u5e72\u6270\u7684\u80fd\u529b\u3002\u901a\u8fc7\u5728\u9891\u57df\u4e2d\u7d27\u5bc6\u95f4\u9694\u5b50\u8f7d\u6ce2\uff0c\u5f62\u6210\u4e00\u7ec4\u7d27\u5bc6\u95f4\u9694\u7684FDM\u5b50\u8f7d\u6ce2\uff0c\u6bcf\u4e2a\u4f20\u8f93\u5b50\u8f7d\u6ce2\u5177\u6709\u540c\u6b65\u529f\u80fd\uff0c\u4ea7\u751f\u91cd\u53e0\u7684\u9891\u8c31\u7279\u6027\uff0c\u51cf\u5c11\u5b50\u8f7d\u6ce2\u95f4\u7684\u5e72\u6270\uff0c\u63d0\u9ad8\u9891\u8c31\u6548\u7387\u5229\u7528\u7387\u3002<\/p>\n\n\n\n \u3000\u3000\u57fa\u4e8eOFDM\u7684\u901a\u4fe1\u6280\u672f\u4f7f\u5f97\u5728\u4f20\u8f93\u8fc7\u7a0b\u4e2d\u80fd\u591f\u5b9e\u73b0\u4f4e\u5ef6\u8fdf\u3001\u9ad8\u901f\u7387\u7684\u6570\u636e\u4f20\u8f93\u3002<\/p>\n\n\n\n \u3000\u3000OFDM\u6280\u672f\u5728\u65e0\u7ebf\u56fe\u4f20\u4e2d\u7684\u5177\u4f53\u5b9e\u73b0\u65b9\u5f0f\u5305\u62ec\u4fe1\u53f7\u5904\u7406\u4e0e\u8c03\u5236\u3001\u5b50\u8f7d\u6ce2\u5206\u914d\u4e0e\u8c03\u5236\u4ee5\u53ca\u786c\u4ef6\u5b9e\u73b0;<\/p>\n\n\n\n \u3000\u3000\u65e0\u7ebf\u56fe\u4f20\u6a21\u5757\u5728\u8fdc\u8ddd\u79bb\u4f20\u8f93\u4e2d\u9762\u4e34\u7684\u4e3b\u8981\u6311\u6218\u53ca\u89e3\u51b3\u65b9\u6848\u5982\u4e0b\uff1a<\/p>\n\n\n\n \u3000\u3000\u5728\u8fdc\u8ddd\u79bb\u4f20\u8f93\u8fc7\u7a0b\u4e2d\uff0c\u4fe1\u53f7\u4f1a\u53d7\u5230\u5927\u6c14\u3001\u5efa\u7b51\u7269\u548c\u5176\u4ed6\u969c\u788d\u7269\u7684\u5f71\u54cd\uff0c\u5bfc\u81f4\u4fe1\u53f7\u8870\u51cf\u548c\u5e72\u6270\u3002\u8fd9\u4f7f\u5f97\u56fe\u50cf\u8d28\u91cf\u4e0b\u964d\uff0c\u751a\u81f3\u51fa\u73b0\u4e22\u5305\u73b0\u8c61\u3002<\/p>\n\n\n\n \u3000\u3000\u6839\u636e\u9999\u519c\u516c\u5f0f\uff0c\u5e26\u5bbd\u589e\u52a0\u4f1a\u5bfc\u81f4\u7075\u654f\u5ea6\u4e0b\u964d\uff0c\u8fd9\u5bf9\u8fdc\u8ddd\u79bb\u4f20\u8f93\u63d0\u51fa\u4e86\u66f4\u9ad8\u7684\u8981\u6c42\u3002\u4f8b\u5982\uff0c\u65e0\u4eba\u673a\u7684\u5e26\u5bbd\u901a\u5e38\u4ee5\u5146\u6bd4\u7279\u6bcf\u79d2(Mbps)\u8ba1\u7b97\uff0c\u8fd9\u5bf9\u8fdc\u8ddd\u79bb\u4f20\u8f93\u7684\u6311\u6218\u5f88\u5927\u3002<\/p>\n\n\n\n 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