{"id":73462,"date":"2024-01-05T12:48:48","date_gmt":"2024-01-05T04:48:48","guid":{"rendered":"https:\/\/www.techphant.cn\/?p=73462"},"modified":"2024-01-05T12:48:48","modified_gmt":"2024-01-05T04:48:48","slug":"dxzbtxzdgjgn","status":"publish","type":"post","link":"https:\/\/www.techphant.cn\/blog\/73462.html","title":{"rendered":"30db\u4fe1\u566a\u6bd4\uff1a\u901a\u4fe1\u4e2d\u7684\u5173\u952e\u6982\u5ff5"},"content":{"rendered":"
\u5728\u73b0\u4ee3\u901a\u8baf\u9886\u57df\uff0c30db\u4fe1\u566a\u6bd4\u662f\u4e00\u4e2a\u81f3\u5173\u91cd\u8981\u7684\u6982\u5ff5\u3002\u672c\u6587\u5c06\u6df1\u5165\u63a2\u8ba8\u8fd9\u4e00\u6982\u5ff5\u5bf9\u901a\u4fe1\u7684\u91cd\u8981\u6027\uff0c\u4ee5\u53ca\u5b83\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\u7684\u4f5c\u7528\u3002<\/p>\n
\u4fe1\u566a\u6bd4\uff08Signal-to-Noise Ratio\uff0cSNR\uff09\u662f\u6307\u4fe1\u53f7\u4e0e\u566a\u58f0\u4e4b\u95f4\u7684\u529f\u7387\u6216\u80fd\u91cf\u7684\u6bd4\u503c\u3002\u5728\u901a\u4fe1\u9886\u57df\u4e2d\uff0c\u4fe1\u53f7\u4ee3\u8868\u7740\u6240\u4f20\u9001\u4fe1\u606f\u7684\u5185\u5bb9\uff0c\u800c\u566a\u58f0\u5219\u662f\u7531\u5404\u79cd\u5e72\u6270\u56e0\u7d20\u5f15\u8d77\u7684\u5e72\u6270\u4fe1\u53f7\u3002<\/p>\n
\u4fe1\u566a\u6bd4\u7684\u8ba1\u7b97\u516c\u5f0f\u4e3a\uff1aSNR = 10 * log10(Signal Power \/ Noise Power)\u3002\u5176\u4e2d\uff0cSignal Power\u6307\u7684\u662f\u4fe1\u53f7\u7684\u529f\u7387\uff0cNoise Power\u6307\u7684\u662f\u566a\u58f0\u7684\u529f\u7387\u3002<\/p>\n
\u901a\u4fe1\u4e2d\u5f71\u54cd\u4fe1\u566a\u6bd4\u7684\u56e0\u7d20\u5305\u62ec\u4fe1\u53f7\u8870\u51cf\u3001\u4f20\u8f93\u4ecb\u8d28\u635f\u8017\u3001\u8bbe\u5907\u8d28\u91cf\u7b49\u3002\u4e86\u89e3\u5e76\u63a7\u5236\u8fd9\u4e9b\u56e0\u7d20\uff0c\u5bf9\u4e8e\u63d0\u9ad8\u901a\u4fe1\u8d28\u91cf\u81f3\u5173\u91cd\u8981\u3002<\/p>\n