{"id":98556,"date":"2024-10-28T13:50:11","date_gmt":"2024-10-28T05:50:11","guid":{"rendered":"\/\/www.viralrail.com\/?p=98556"},"modified":"2024-10-28T13:50:19","modified_gmt":"2024-10-28T05:50:19","slug":"snssmys","status":"publish","type":"post","link":"\/\/www.viralrail.com\/blog\/98556.html","title":{"rendered":"s\/n\u662f\u4ec0\u4e48\u610f\u601d"},"content":{"rendered":"\n<p>\u3000\u3000<strong>\u4fe1\u566a\u6bd4(S\/N)<\/strong>\u662f\u6307\u4fe1\u53f7\u7684\u5e73\u5747\u529f\u7387\u4e0e\u566a\u58f0\u7684\u529f\u7387\u4e4b\u6bd4\uff0c\u7528\u4e8e\u8861\u91cf\u4fe1\u53f7\u8d28\u91cf\u7684\u4e00\u4e2a\u91cd\u8981\u53c2\u6570\u3002\u5728\u4e0d\u540c\u7684\u9886\u57df\u548c\u5e94\u7528\u4e2d\uff0c\u4fe1\u566a\u6bd4\u7684\u5b9a\u4e49\u548c\u8ba1\u7b97\u65b9\u6cd5\u53ef\u80fd\u6709\u6240\u4e0d\u540c\uff0c\u4f46\u5176\u6838\u5fc3\u6982\u5ff5\u662f\u4e00\u81f4\u7684\uff1a\u5373\u4fe1\u53f7\u4e0e\u566a\u58f0\u7684\u76f8\u5bf9\u5f3a\u5ea6\u3002<\/p>\n\n\n\n<p>\u3000\u3000\u5728\u7535\u5b50\u5de5\u7a0b\u548c\u901a\u4fe1\u9886\u57df\uff0c\u4fe1\u566a\u6bd4\u901a\u5e38\u5b9a\u4e49\u4e3a\u4fe1\u53f7\u529f\u7387\u4e0e\u566a\u58f0\u529f\u7387\u7684\u6bd4\u503c\uff0c\u5355\u4f4d\u53ef\u4ee5\u662f\u5206\u8d1d(dB)\u3002\u4f8b\u5982\uff0c\u5728\u97f3\u9891\u8bbe\u5907\u4e2d\uff0c\u4fe1\u566a\u6bd4\u7528\u4e8e\u8861\u91cf\u97f3\u9891\u4fe1\u53f7\u7684\u8d28\u91cf\uff0c\u9ad8\u4fe1\u566a\u6bd4\u610f\u5473\u7740\u4fe1\u53f7\u4e2d\u7684\u566a\u58f0\u66f4\u5c0f\uff0c\u97f3\u8d28\u66f4\u597d\u3002<\/p>\n\n\n\n<p>\u3000\u3000\u5728\u7edf\u8ba1\u5b66\u4e2d\uff0c\u4fe1\u566a\u6bd4\u5b9a\u4e49\u4e3a\u4fe1\u53f7\u7684\u65b9\u5dee\u4e0e\u566a\u58f0\u7684\u65b9\u5dee\u4e4b\u6bd4\uff0c\u7528\u4e8e\u8bc4\u4f30\u6a21\u578b\u4e2d\u4fe1\u53f7\u7684\u663e\u8457\u6027\u3002<\/p>\n\n\n\n<p>\u3000\u3000\u5728\u56fe\u50cf\u5904\u7406\u4e2d\uff0c\u4fe1\u566a\u6bd4\u662f\u8861\u91cf\u56fe\u50cf\u8d28\u91cf\u7684\u91cd\u8981\u53c2\u6570\uff0c\u5b9a\u4e49\u4e3a\u4fe1\u53f7\u5f3a\u5ea6\u4e0e\u566a\u58f0\u5f3a\u5ea6\u7684\u6bd4\u503c\uff0c\u901a\u5e38\u4ee5\u5206\u8d1d(dB)\u8868\u793a\u3002<\/p>\n\n\n\n<p>\u3000\u3000\u5728\u96f7\u8fbe\u548c\u901a\u4fe1\u7cfb\u7edf\u4e2d\uff0c\u4fe1\u566a\u6bd4\u7528\u4e8e\u8861\u91cf\u63a5\u6536\u5668\u7684\u6027\u80fd\uff0c\u786e\u4fdd\u4fe1\u53f7\u529f\u7387\u8d85\u8fc7\u566a\u58f0\u529f\u7387\u4ee5\u5b9e\u73b0\u53ef\u68c0\u6d4b\u6027\u3002<\/p>\n\n\n\n<p>\u3000\u3000\u4fe1\u566a\u6bd4\u662f\u4e00\u4e2a\u591a\u9886\u57df\u901a\u7528\u7684\u6982\u5ff5\uff0c\u7528\u4e8e\u8bc4\u4f30\u4fe1\u53f7\u5904\u7406\u7cfb\u7edf\u4e2d\u4fe1\u53f7\u4e0e\u566a\u58f0\u7684\u76f8\u5bf9\u5f3a\u5ea6\uff0c\u4ece\u800c\u5f71\u54cd\u7cfb\u7edf\u7684\u6027\u80fd\u548c\u8d28\u91cf\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u3000\u3000\u4e00\u3001 \u4fe1\u566a\u6bd4\u5728\u4e0d\u540c\u9886\u57df\u7684\u5177\u4f53\u5e94\u7528\u548c\u8ba1\u7b97\u65b9\u6cd5\u662f\u4ec0\u4e48?<\/h2>\n\n\n\n<p>\u3000\u3000\u4fe1\u566a\u6bd4(Signal-to-Noise Ratio, SNR)\u662f\u8861\u91cf\u4fe1\u53f7\u4e0e\u566a\u58f0\u4e4b\u95f4\u6bd4\u7387\u7684\u91cd\u8981\u6307\u6807\uff0c\u5e7f\u6cdb\u5e94\u7528\u4e8e\u591a\u4e2a\u9886\u57df\uff0c\u5305\u62ec\u901a\u4fe1\u3001\u97f3\u9891\u5904\u7406\u3001\u56fe\u50cf\u5904\u7406\u548c\u79d1\u5b66\u6d4b\u91cf\u7b49\u3002\u5728\u8fd9\u4e9b\u9886\u57df\u4e2d\uff0c\u4fe1\u566a\u6bd4\u7528\u4e8e\u8bc4\u4f30\u7cfb\u7edf\u6027\u80fd\uff0c\u786e\u4fdd\u4fe1\u53f7\u7684\u6e05\u6670\u5ea6\u548c\u51c6\u786e\u6027\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u3000\u3000\u8ba1\u7b97\u65b9\u6cd5<\/h3>\n\n\n\n<p>\u3000\u3000\u4fe1\u566a\u6bd4\u7684\u8ba1\u7b97\u516c\u5f0f\u4e3a\uff1a<\/p>\n\n\n\n<p>\u3000\u3000<strong>SNR = 10 log10 (P_signal \/ P_noise)<\/strong><\/p>\n\n\n\n<p>\u3000\u3000\u5176\u4e2d\uff0cPsPs\u200b&nbsp;\u4ee3\u8868\u4fe1\u53f7\u7684\u5e73\u5747\u529f\u7387\uff0cPnPn\u200b&nbsp;\u4ee3\u8868\u566a\u58f0\u7684\u5e73\u5747\u529f\u7387\u3002\u8fd9\u4e2a\u6bd4\u7387\u901a\u5e38\u4ee5\u5206\u8d1d(dB)\u4e3a\u5355\u4f4d\u8868\u793a\uff0c\u8f6c\u6362\u516c\u5f0f\u4e3a\uff1a<\/p>\n\n\n\n<p>\u3000\u3000SNR(dB)=10\u00d7log\u206110(SNR)\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u3000\u3000\u5177\u4f53\u5e94\u7528<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u3000\u3000<strong>\u901a\u4fe1\u7cfb\u7edf<\/strong>\uff1a\u5728\u65e0\u7ebf\u901a\u4fe1\u4e2d\uff0c\u4fe1\u566a\u6bd4\u51b3\u5b9a\u4e86\u4fe1\u53f7\u7684\u4f20\u8f93\u8d28\u91cf\u548c\u901a\u4fe1\u8ddd\u79bb\u3002\u8c03\u5236\u65b9\u5f0f\u3001\u4fe1\u9053\u7f16\u7801\u548c\u529f\u7387\u63a7\u5236\u7b49\u6280\u672f\u90fd\u662f\u4e3a\u4e86\u4f18\u5316\u4fe1\u566a\u6bd4\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u97f3\u9891\u5904\u7406<\/strong>\uff1a\u4fe1\u566a\u6bd4\u7528\u4e8e\u8bc4\u4f30\u5f55\u97f3\u7684\u6e05\u6670\u5ea6\uff0c\u4fe1\u566a\u6bd4\u8d8a\u9ad8\uff0c\u8868\u793a\u80cc\u666f\u566a\u97f3\u8d8a\u5c11\uff0c\u539f\u59cb\u97f3\u9891\u7684\u6e05\u6670\u5ea6\u8d8a\u9ad8\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u56fe\u50cf\u5904\u7406<\/strong>\uff1a\u5728\u56fe\u50cf\u5904\u7406\u4e2d\uff0c\u4fe1\u566a\u6bd4\u7528\u4e8e\u8bc4\u4f30\u56fe\u50cf\u8d28\u91cf\uff0c\u9ad8\u4fe1\u566a\u6bd4\u610f\u5473\u7740\u56fe\u50cf\u4e2d\u7684\u566a\u58f0\u8f83\u5c11\uff0c\u56fe\u50cf\u66f4\u52a0\u6e05\u6670\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u79d1\u5b66\u6d4b\u91cf<\/strong>\uff1a\u5728\u79d1\u5b66\u6d4b\u91cf\u4e2d\uff0c\u4fe1\u566a\u6bd4\u7528\u4e8e\u8bc4\u4f30\u6d4b\u91cf\u7ed3\u679c\u7684\u51c6\u786e\u6027\uff0c\u9ad8\u4fe1\u566a\u6bd4\u610f\u5473\u7740\u6d4b\u91cf\u7ed3\u679c\u66f4\u52a0\u53ef\u9760\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u3000\u3000\u6d4b\u91cf\u65b9\u6cd5<\/h3>\n\n\n\n<p>\u3000\u3000\u5728\u7279\u5b9a\u9886\u57df\uff0c\u5982\u9ad8\u5149\u8c31\u76f8\u673a\uff0c\u4fe1\u566a\u6bd4\u7684\u6d4b\u91cf\u901a\u5e38\u91c7\u7528\u566a\u58f0\u6d4b\u91cf\u6cd5\u548c\u4fe1\u53f7\u6d4b\u91cf\u6cd5\u3002\u9891\u8c31\u5206\u6790\u4eea\u4e2d\u6d4b\u91cf\u4fe1\u566a\u6bd4\u7684\u65b9\u6cd5\u5305\u62ec\u529f\u7387\u6cd5\u548c\u5cf0-\u566a\u6bd4\u6cd5\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u3000\u3000\u4e8c\u3001 \u5982\u4f55\u63d0\u9ad8\u4fe1\u566a\u6bd4\u4ee5\u4f18\u5316\u901a\u4fe1\u7cfb\u7edf\u7684\u6027\u80fd?<\/h2>\n\n\n\n<p>\u3000\u3000\u63d0\u9ad8\u4fe1\u566a\u6bd4(SNR)\u662f\u4f18\u5316\u901a\u4fe1\u7cfb\u7edf\u6027\u80fd\u7684\u91cd\u8981\u624b\u6bb5\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u6709\u6548\u7684\u65b9\u6cd5\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u3000\u3000<strong>\u4f7f\u7528\u6ee4\u6ce2\u5668\u548c\u566a\u58f0\u6291\u5236\u6280\u672f<\/strong>\uff1a\u6ee4\u6ce2\u5668\u53ef\u4ee5\u8fc7\u6ee4\u6389\u4e0d\u9700\u8981\u7684\u9891\u7387\u6210\u5206\uff0c\u53ea\u4fdd\u7559\u6709\u7528\u7684\u4fe1\u53f7\u6210\u5206\uff0c\u800c\u566a\u58f0\u6291\u5236\u6280\u672f\u5219\u53ef\u4ee5\u901a\u8fc7\u6291\u5236\u80cc\u666f\u566a\u58f0\u6765\u63d0\u9ad8\u4fe1\u566a\u6bd4\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u9009\u62e9\u5408\u9002\u7684\u5929\u7ebf\u548c\u9891\u7387<\/strong>\uff1a\u901a\u8fc7\u9009\u62e9\u5408\u9002\u7684\u5929\u7ebf\u548c\u9891\u7387\uff0c\u53ef\u4ee5\u51cf\u5c11\u4fe1\u53f7\u4f20\u8f93\u8fc7\u7a0b\u4e2d\u7684\u5e72\u6270\uff0c\u4ece\u800c\u63d0\u9ad8\u4fe1\u566a\u6bd4\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u8c03\u6574\u53d1\u5c04\u548c\u63a5\u6536\u529f\u7387<\/strong>\uff1a\u9002\u5f53\u8c03\u6574\u53d1\u5c04\u548c\u63a5\u6536\u7aef\u7684\u529f\u7387\uff0c\u53ef\u4ee5\u6539\u5584\u4fe1\u53f7\u7684\u8d28\u91cf\uff0c\u8fdb\u800c\u63d0\u9ad8\u4fe1\u566a\u6bd4\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u91c7\u7528\u4e0d\u540c\u7684\u8c03\u5236\u65b9\u6848<\/strong>\uff1a\u4f8b\u5982GMSK\u8c03\u5236\u65b9\u6848\uff0c\u53ef\u4ee5\u63d0\u9ad8\u4fe1\u566a\u6bd4\u3002\u6b64\u5916\uff0c\u9891\u8c31\u591a\u6837\u6027\u548c\u7a7a\u95f4\u591a\u6837\u6027\u6280\u672f\u901a\u8fc7\u5728\u76f8\u540c\u57fa\u5e26\u4fe1\u53f7\u4e0a\u8c03\u5236\u4e24\u4e2a\u4e0d\u540c\u7684\u5c04\u9891\u8f7d\u6ce2\uff0c\u4e5f\u80fd\u6539\u5584\u63a5\u6536\u4fe1\u53f7\u7684\u8d28\u91cf\u5e76\u51cf\u5c11\u6240\u9700\u7684\u4fe1\u566a\u6bd4\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u6269\u9891\u6280\u672f<\/strong>\uff1a\u901a\u8fc7\u6269\u5c55\u4fe1\u53f7\u7684\u9891\u8c31\uff0c\u518d\u5c06\u63a5\u6536\u7684\u6269\u8c31\u4fe1\u53f7\u7684\u9891\u8c31\u53d8\u6362\u5230\u539f\u59cb\u7684\u4fe1\u606f\u5e26\u5bbd\uff0c\u53ef\u4ee5\u663e\u8457\u63d0\u9ad8\u4fe1\u566a\u6bd4\u3002\u8fd9\u79cd\u65b9\u6cd5\u5229\u7528\u4e86C.E.Shannon\u516c\u5f0f\u4e2d\u5173\u4e8e\u4fe1\u53f7\u9891\u8c31\u6269\u5c55\u63d0\u9ad8\u6297\u5e72\u6270\u6027\u7684\u539f\u7406\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u9884\u52a0\u91cd\u548c\u53bb\u52a0\u91cd\u6ee4\u6ce2\u5668<\/strong>\uff1a\u5728\u53d1\u5c04\u7aef\u548c\u63a5\u6536\u673a\u4e2d\u5206\u522b\u52a0\u91cd\u548c\u51cf\u8f7b\u9ad8\u9891\u5206\u91cf\uff0c\u53ef\u4ee5\u6539\u5584\u8f93\u51fa\u4fe1\u566a\u6bd4\u3002\u8fd9\u79cd\u65b9\u6cd5\u9700\u8981\u786e\u4fdd\u9884\u52a0\u91cd\u548c\u53bb\u52a0\u91cd\u6ee4\u6ce2\u5668\u7684\u9891\u7387\u54cd\u5e94\u76f8\u53cd\uff0c\u4ee5\u786e\u4fdd\u63a5\u6536\u673a\u8f93\u51fa\u4fe1\u53f7\u7684\u5e73\u5747\u529f\u7387\u4e0d\u53d7\u5f71\u54cd\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u524d\u7aef\u5904\u7406<\/strong>\uff1a\u5bf9\u63a5\u6536\u4fe1\u53f7\u8fdb\u884c\u524d\u7aef\u5904\u7406\uff0c\u5305\u62ec\u51cf\u5c11\u5e72\u6270\u3001\u589e\u5f3a\u6240\u9700\u4fe1\u53f7\u4ee5\u53ca\u4f18\u5148\u6d88\u9664\u5e72\u6270\uff0c\u662f\u63d0\u9ad8\u4fe1\u566a\u6bd4\u7684\u6709\u6548\u65b9\u6cd5\u3002\u7136\u800c\uff0c\u8fd9\u4e9b\u65b9\u6cd5\u53ef\u80fd\u5177\u6709\u6210\u672c\u9ad8\u6216\u6548\u679c\u4e0d\u7406\u60f3\u7684\u95ee\u9898\u3002<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\u3000\u3000\u4e09\u3001 \u5728\u56fe\u50cf\u5904\u7406\u4e2d\uff0c\u4fe1\u566a\u6bd4\u5bf9\u56fe\u50cf\u8d28\u91cf\u7684\u5f71\u54cd\u6709\u54ea\u4e9b\u5177\u4f53\u6848\u4f8b?<\/h2>\n\n\n\n<p>\u3000\u3000\u5728\u56fe\u50cf\u5904\u7406\u4e2d\uff0c\u4fe1\u566a\u6bd4\u5bf9\u56fe\u50cf\u8d28\u91cf\u7684\u5f71\u54cd\u53ef\u4ee5\u901a\u8fc7\u591a\u4e2a\u5177\u4f53\u6848\u4f8b\u6765\u8bf4\u660e\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u3000\u3000<strong>\u5149\u5b66\u76f8\u5e72\u65ad\u5c42\u626b\u63cf\u8840\u7ba1\u9020\u5f71\uff08OCTA\uff09\u6280\u672f<\/strong>\uff1a\u901a\u8fc7\u57fa\u4e8e\u5c40\u90e8\u4fe1\u566a\u6bd4\u52a8\u6001\u9608\u503c\u8c03\u8282\u7684\u65b9\u6cd5\uff0c\u53ef\u4ee5\u6539\u5584OCTA\u56fe\u50cf\u7684\u8d28\u91cf\u3002\u8be5\u65b9\u6cd5\u901a\u8fc7\u524a\u5f31\u8f74\u5411\u8fd0\u52a8\u4f2a\u5f71\u5e76\u52a0\u5f3a\u8840\u6d41\u4fe1\u606f\uff0c\u6709\u6548\u6291\u5236\u4e86\u5fae\u8840\u7ba1\u56fe\u50cf\u4e2d\u7684\u9759\u6001\u4f53\u7d20\u566a\u58f0\uff0c\u63d0\u5347\u4e86\u56fe\u50cf\u5bf9\u6bd4\u5ea6\u548c\u8840\u7ba1\u53ef\u89c6\u6027\uff0c\u4ece\u800c\u6709\u5229\u4e8e\u75be\u75c5\u7684\u8bca\u65ad\u548c\u8bc4\u4f30\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u4f4e\u7167\u5ea6\u77ed\u6ce2\u7ea2\u5916\u56fe\u50cf\u589e\u5f3a<\/strong>\uff1a\u5728\u4f4e\u4fe1\u566a\u6bd4\u7684\u573a\u666f\u4e0b\uff0c\u91c7\u75283D\u964d\u566a\u548c\u81ea\u9002\u5e94\u7070\u5ea6\u6620\u5c04\u7684\u65b9\u6cd5\uff0c\u53ef\u4ee5\u663e\u8457\u63d0\u5347\u56fe\u50cf\u7684\u7ec6\u8282\u548c\u663e\u793a\u6548\u679c\u3002\u8fd9\u79cd\u65b9\u6cd5\u901a\u8fc7\u6291\u5236\u968f\u673a\u566a\u58f0\uff0c\u5e76\u7ed3\u5408retinex\u7b97\u6cd5\u589e\u5f3a\u56fe\u50cf\u7ec6\u8282\uff0c\u6539\u5584\u4e86\u56fe\u50cf\u7684\u4fe1\u566a\u6bd4\uff0c\u4ece\u800c\u63d0\u5347\u4e86\u56fe\u50cf\u8d28\u91cf\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u6539\u8fdb\u7684Top-hat\u65b9\u6cd5<\/strong>\uff1a\u5728\u56fe\u50cf\u5904\u7406\u4e2d\uff0c\u901a\u8fc7\u7a7a\u57df\u548c\u65f6\u57df\u7684\u878d\u5408\u5904\u7406\uff0c\u53ef\u4ee5\u6709\u6548\u63d0\u9ad8\u56fe\u50cf\u7684\u4fe1\u566a\u6bd4\u3002\u8be5\u65b9\u6cd5\u5728\u4e0d\u540c\u4fe1\u566a\u6bd4\u6761\u4ef6\u4e0b\u5747\u80fd\u663e\u8457\u589e\u5f3a\u70b9\u50cf\u5143\uff0c\u63d0\u5347\u5e73\u5747\u7070\u5ea6\u548c\u4fe1\u566a\u6bd4\uff0c\u4ece\u800c\u63d0\u9ad8\u56fe\u50cf\u8d28\u91cf\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u663e\u5fae\u955c\u56fe\u50cf\u53bb\u566a<\/strong>\uff1a\u5728\u8521\u53f8\u663e\u5fae\u955c\u4e2d\uff0c\u901a\u8fc7\u5e73\u6ed1\u5904\u7406\u548c\u53bb\u566a\u529f\u80fd(\u5982Interpolation)\uff0c\u53ef\u4ee5\u63d0\u9ad8\u4fe1\u566a\u6bd4\uff0c\u4f7f\u56fe\u50cf\u66f4\u52a0\u67d4\u548c\uff0c\u8fbe\u5230\u53bb\u566a\u7684\u76ee\u7684\u3002\u8fd9\u79cd\u65b9\u6cd5\u901a\u8fc7\u6a21\u7cca\u50cf\u7d20\u70b9\u4e4b\u95f4\u7684\u8fb9\u754c\u6765\u51cf\u5c11\u566a\u58f0\uff0c\u4ece\u800c\u63d0\u5347\u56fe\u50cf\u8d28\u91cf\u3002<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\u3000\u3000\u56db\u3001 \u97f3\u9891\u8bbe\u5907\u4e2d\u4fe1\u566a\u6bd4\u7684\u884c\u4e1a\u6807\u51c6\u662f\u4ec0\u4e48?<\/h2>\n\n\n\n<p>\u3000\u3000\u97f3\u9891\u8bbe\u5907\u4e2d\u4fe1\u566a\u6bd4\u7684\u884c\u4e1a\u6807\u51c6\u56e0\u4e0d\u540c\u7684\u5e94\u7528\u573a\u666f\u548c\u8bbe\u5907\u7c7b\u578b\u800c\u6709\u6240\u4e0d\u540c\u3002\u6211\u4eec\u53ef\u4ee5\u770b\u5230\u4ee5\u4e0b\u51e0\u79cd\u60c5\u51b5\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u3000\u3000<strong>\u9ad8\u4fdd\u771f\u97f3\u9891\u4ea7\u54c1<\/strong>\uff1a\u5728CPHA\u8ba4\u8bc1\u7684\u9ad8\u4fdd\u771f\u97f3\u9891\u4ea7\u54c1\u4e2d\uff0c\u4fe1\u566a\u6bd4\u7684\u8981\u6c42\u662fSW\u901a\u9053\u4e0d\u4f4e\u4e8e68dB\uff0c\u5176\u4ed6\u901a\u9053\u4e0d\u4f4e\u4e8e75dB(A)\u3002\u6b64\u5916\uff0c\u5bf9\u4e8e\u97f3\u6e90\/\u529f\u653e\u8bbe\u5907\uff0c\u4fe1\u566a\u6bd4\u8981\u6c42\u8fbe\u523095dB\u4ee5\u4e0a\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u4e00\u822c\u97f3\u54cd\/\u8033\u673a\u8bbe\u5907<\/strong>\uff1a\u5728\u201c\u91d1\u8033\u6735\u9009\u62e9\u201d\u8ba4\u8bc1\u8bc4\u6d4b\u5927\u7eb2\u4e2d\uff0c\u4fe1\u566a\u6bd4\u8981\u6c42SW\u901a\u9053\u4e0d\u4f4e\u4e8e55dB\uff0c\u5176\u4ed6\u901a\u9053\u4e0d\u4f4e\u4e8e71dB(A)\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u6269\u58f0\u7cfb\u7edf\u8bbe\u8ba1\u89c4\u8303<\/strong>\uff1a\u5728\u5385\u5802\u6269\u58f0\u7cfb\u7edf\u8bbe\u8ba1\u89c4\u8303\u4e2d\uff0c\u4fe1\u566a\u6bd4\u8981\u6c42\u901a\u8def\u4e2d\u6700\u5dee\u7684\u5355\u673a\u8bbe\u5907\u4fe1\u566a\u6bd4\u4e0d\u4f4e\u4e8e3dB\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u9ad8\u4fdd\u771f\u5ea6\u8981\u6c42<\/strong>\uff1a\u4e00\u822c\u60c5\u51b5\u4e0b\uff0c\u9ad8\u4fdd\u771f\u97f3\u7bb1\u7684\u4fe1\u566a\u6bd4\u5e94\u8fbe\u5230110dB\u4ee5\u4e0a\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u3000\u3000\u4fe1\u566a\u6bd4\u7684\u5177\u4f53\u6807\u51c6\u4f1a\u6839\u636e\u4e0d\u540c\u7684\u5e94\u7528\u548c\u8bbe\u5907\u7c7b\u578b\u6709\u6240\u53d8\u5316\u3002\u4f8b\u5982\uff0c\u5728\u9ad8\u4fdd\u771f\u97f3\u9891\u4ea7\u54c1\u4e2d\uff0c\u4fe1\u566a\u6bd4\u8981\u6c42\u8f83\u9ad8\uff0c\u4ee5\u786e\u4fdd\u97f3\u8d28\u7684\u7eaf\u51c0\u5ea6;\u800c\u5728\u4e00\u822c\u7684\u97f3\u54cd\u8bbe\u5907\u4e2d\uff0c\u4fe1\u566a\u6bd4\u8981\u6c42\u76f8\u5bf9\u8f83\u4f4e\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u3000\u3000\u4e94\u3001 \u7edf\u8ba1\u5b66\u4e2d\u4fe1\u566a\u6bd4\u7684\u8ba1\u7b97\u65b9\u6cd5\u4e0e\u7535\u5b50\u5de5\u7a0b\u4e2d\u7684\u6709\u4f55\u4e0d\u540c?<\/h2>\n\n\n\n<p>\u3000\u3000\u5728\u7edf\u8ba1\u5b66\u548c\u7535\u5b50\u5de5\u7a0b\u4e2d\uff0c\u4fe1\u566a\u6bd4(SNR)\u7684\u8ba1\u7b97\u65b9\u6cd5\u5b58\u5728\u4e00\u4e9b\u5dee\u5f02\u3002<\/p>\n\n\n\n<p>\u3000\u3000\u5728\u7edf\u8ba1\u5b66\u4e2d\uff0c\u4fe1\u566a\u6bd4\u901a\u5e38\u901a\u8fc7\u8ba1\u7b97\u4fe1\u53f7\u529f\u7387\u4e0e\u566a\u58f0\u529f\u7387\u7684\u6bd4\u503c\u6765\u8868\u793a\uff0c\u516c\u5f0f\u4e3aSNR = 10 log10(Ps\/Pn)\uff0c\u5176\u4e2dPs\u4ee3\u8868\u4fe1\u53f7\u7684\u5e73\u5747\u529f\u7387\uff0cPn\u4ee3\u8868\u566a\u58f0\u7684\u5e73\u5747\u529f\u7387\u3002\u8fd9\u79cd\u65b9\u6cd5\u4f7f\u7528\u5bf9\u6570\u5c3a\u5ea6\u662f\u56e0\u4e3a\u5b83\u80fd\u591f\u66f4\u597d\u5730\u53cd\u6620\u4fe1\u53f7\u4e0e\u566a\u58f0\u7684\u6bd4\u4f8b\u5173\u7cfb\uff0c\u5e76\u4e14\u5728\u5904\u7406\u5927\u8303\u56f4\u7684\u529f\u7387\u6bd4\u65f6\u66f4\u52a0\u76f4\u89c2\u3002<\/p>\n\n\n\n<p>\u3000\u3000\u800c\u5728\u7535\u5b50\u5de5\u7a0b\u4e2d\uff0c\u4fe1\u566a\u6bd4\u7684\u8ba1\u7b97\u65b9\u6cd5\u4e5f\u5e38\u4f7f\u7528\u7c7b\u4f3c\u7684\u65b9\u6cd5\uff0c\u5373SNR = 10 log10(Ps\/Pn)\uff0c\u5176\u4e2dPs\u548cPn\u5206\u522b\u4ee3\u8868\u4fe1\u53f7\u548c\u566a\u58f0\u7684\u6709\u6548\u529f\u7387\u3002\u6b64\u5916\uff0c\u7535\u5b50\u5de5\u7a0b\u4e2d\u8fd8\u53ef\u80fd\u91c7\u7528\u57fa\u4e8e\u7535\u538b\u5e45\u503c\u6bd4\u7387\u7684\u65b9\u6cd5\uff0c\u5373SNR = 20 log10(Vs\/Vn)\uff0c\u5176\u4e2dVs\u548cVn\u5206\u522b\u4ee3\u8868\u4fe1\u53f7\u548c\u566a\u58f0\u7684\u7535\u538b\u5e45\u503c\u3002\u8fd9\u79cd\u65b9\u6cd5\u9002\u7528\u4e8e\u9700\u8981\u8003\u8651\u4fe1\u53f7\u548c\u566a\u58f0\u5728\u7535\u538b\u5e45\u5ea6\u4e0a\u7684\u6bd4\u4f8b\u5173\u7cfb\u7684\u573a\u666f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4fe1\u566a\u6bd4(S\/N)\u662f\u6307\u4fe1\u53f7\u7684\u5e73\u5747\u529f\u7387\u4e0e\u566a\u58f0\u7684\u529f\u7387\u4e4b\u6bd4\uff0c\u7528\u4e8e\u8861\u91cf\u4fe1\u53f7\u8d28\u91cf\u7684\u4e00\u4e2a\u91cd\u8981\u53c2\u6570\u3002\u5728\u4e0d\u540c\u7684\u9886\u57df\u548c\u5e94\u7528\u4e2d\uff0c\u4fe1\u566a\u6bd4\u7684\u5b9a\u4e49\u548c\u8ba1\u7b97\u65b9\u6cd5\u53ef\u80fd\u6709\u6240\u4e0d\u540c<\/p>\n","protected":false},"author":1,"featured_media":98341,"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":[185],"class_list":["post-98556","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-xzb"],"_links":{"self":[{"href":"\/\/www.viralrail.com\/wp-json\/wp\/v2\/posts\/98556"}],"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=98556"}],"version-history":[{"count":1,"href":"\/\/www.viralrail.com\/wp-json\/wp\/v2\/posts\/98556\/revisions"}],"predecessor-version":[{"id":98557,"href":"\/\/www.viralrail.com\/wp-json\/wp\/v2\/posts\/98556\/revisions\/98557"}],"wp:featuredmedia":[{"embeddable":true,"href":"\/\/www.viralrail.com\/wp-json\/wp\/v2\/media\/98341"}],"wp:attachment":[{"href":"\/\/www.viralrail.com\/wp-json\/wp\/v2\/media?parent=98556"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"\/\/www.viralrail.com\/wp-json\/wp\/v2\/categories?post=98556"},{"taxonomy":"post_tag","embeddable":true,"href":"\/\/www.viralrail.com\/wp-json\/wp\/v2\/tags?post=98556"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}