{"id":85222,"date":"2024-01-11T11:40:58","date_gmt":"2024-01-11T03:40:58","guid":{"rendered":"\/\/www.viralrail.com\/?p=85222"},"modified":"2024-01-11T11:41:02","modified_gmt":"2024-01-11T03:41:02","slug":"ffxgjtwmlgs","status":"publish","type":"post","link":"\/\/www.viralrail.com\/blog\/85222.html","title":{"rendered":"2FSK\u975e\u76f8\u5e72\u89e3\u8c03\u8bef\u7801\u7387\u516c\u5f0f"},"content":{"rendered":"\n
\u3000\u3000\u5728\u65e0\u7ebf\u901a\u4fe1\u7cfb\u7edf<\/strong>\u4e2d\uff0c\u975e\u76f8\u5e72\u89e3\u8c03\u662f\u4e00\u79cd\u5e38\u7528\u7684\u89e3\u8c03\u6280\u672f\uff0c\u5c24\u5176\u5728\u4f4e\u590d\u6742\u5ea6\u548c\u4f4e\u529f\u8017\u7684\u5e94\u7528\u573a\u666f\u4e2d\u5177\u6709\u91cd\u8981\u7684\u610f\u4e49\u3002\u5176\u4e2d\uff0c2FSK(\u4e8c\u8fdb\u5236\u9891\u79fb\u952e\u63a7)\u662f\u4e00\u79cd\u5e38\u89c1\u7684\u8c03\u5236\u65b9\u5f0f\uff0c\u53ef\u4ee5\u901a\u8fc7\u9891\u7387\u7684\u53d8\u5316\u6765\u8868\u793a\u6570\u5b57\u4fe1\u53f7\u7684\u4e0d\u540c\u7b26\u53f7\u3002\u672c\u6587\u5c06\u8be6\u7ec6\u4ecb\u7ecd2FSK\u975e\u76f8\u5e72\u89e3\u8c03\u7684\u8bef\u7801\u7387\u516c\u5f0f<\/strong>\u53ca\u5176\u5e94\u7528\u3002<\/p>\n\n\n\n \u3000\u30002FSK\u975e\u76f8\u5e72\u89e3\u8c03\u662f\u4e00\u79cd\u57fa\u4e8e\u9891\u7387\u5dee\u5f02\u7684\u89e3\u8c03\u6280\u672f\u3002\u57282FSK\u8c03\u5236\u4e2d\uff0c\u4e24\u4e2a\u4e0d\u540c\u7684\u9891\u7387\u5206\u522b\u4ee3\u8868\u4e24\u4e2a\u4e0d\u540c\u7684\u6570\u5b57\u4fe1\u53f7\u3002\u975e\u76f8\u5e72\u89e3\u8c03\u7684\u5173\u952e\u662f\u5229\u7528\u9891\u7387\u5dee\u5f02\u6765\u8fdb\u884c\u89e3\u8c03\uff0c\u800c\u4e0d\u9700\u8981\u77e5\u9053\u4fe1\u53f7\u7684\u76f8\u4f4d\u4fe1\u606f\u3002<\/p>\n\n\n\n \u3000\u3000\u57282FSK\u975e\u76f8\u5e72\u89e3\u8c03\u4e2d\uff0c\u8bef\u7801\u7387\u662f\u8861\u91cf\u89e3\u8c03\u6027\u80fd\u7684\u91cd\u8981\u6307\u6807\u4e4b\u4e00\u3002\u4e0b\u9762\uff0c\u6211\u4eec\u5c06\u63a8\u5bfc2FSK\u975e\u76f8\u5e72\u89e3\u8c03\u7684\u8bef\u7801\u7387\u516c\u5f0f\u3002<\/p>\n\n\n\n \u3000\u3000\u5047\u8bbe\u63a5\u6536\u5230\u76842FSK\u4fe1\u53f7\u53ef\u4ee5\u8868\u793a\u4e3a\uff1a<\/p>\n\n\n\n \u3000\u3000\\[ r(t) = Acos(2\u03c0f_1t + \u03c6_1) + Acos(2\u03c0f_2t + \u03c6_2) + n(t) \\]<\/strong><\/p>\n\n\n\n \u3000\u3000\u5176\u4e2d\uff0cA\u4e3a\u4fe1\u53f7\u5e45\u5ea6\uff0c\\( f_1 \\)\u548c\\( f_2 \\)\u4e3a\u4e24\u4e2a\u4e0d\u540c\u7684\u9891\u7387\uff0c\\( \u03c6_1 \\)\u548c\\( \u03c6_2 \\)\u4e3a\u76f8\u4f4d\uff0cn(t)\u4e3a\u566a\u58f0\u3002<\/p>\n\n\n\n \u3000\u3000\u4e3a\u4e86\u8fdb\u884c2FSK\u975e\u76f8\u5e72\u89e3\u8c03\uff0c\u6211\u4eec\u9700\u8981\u9884\u5148\u8bbe\u7f6e\u4e24\u4e2a\u9891\u7387\\( f_1 \\)\u548c\\( f_2 \\)\uff0c\u7136\u540e\u901a\u8fc7\u9891\u7387\u6bd4\u8f83\u6765\u5224\u65ad\u63a5\u6536\u4fe1\u53f7\u7684\u6570\u5b57\u7b26\u53f7\u3002<\/p>\n\n\n\n \u3000\u3000\u8bef\u7801\u7387\u662f\u6307\u63a5\u6536\u5230\u7684\u6570\u5b57\u4fe1\u53f7\u4e0e\u53d1\u9001\u4fe1\u53f7\u4e0d\u4e00\u81f4\u7684\u6982\u7387\u3002\u57282FSK\u975e\u76f8\u5e72\u89e3\u8c03\u4e2d\uff0c\u8bef\u7801\u7387\u53ef\u4ee5\u901a\u8fc7\u8ba1\u7b97\u4e0d\u540c\u4fe1\u53f7\u4e4b\u95f4\u7684\u6b27\u6c0f\u8ddd\u79bb\u6765\u4f30\u8ba1\u3002\u5177\u4f53\u8ba1\u7b97\u516c\u5f0f\u5982\u4e0b\uff1a<\/p>\n\n\n\n \u3000\u3000\\[ P_e = \\frac{1}{2}erfc\\left(\\sqrt{\\frac{E_s}{2N_0}}\\right) \\]<\/strong><\/p>\n\n\n\n \u3000\u3000\u5176\u4e2d\uff0c\\( E_s \\)\u4e3a\u4fe1\u53f7\u80fd\u91cf\uff0c\\( N_0 \\)\u4e3a\u566a\u58f0\u529f\u7387\u8c31\u5bc6\u5ea6\u3002<\/p>\n\n\n\n \u3000\u30002FSK\u975e\u76f8\u5e72\u89e3\u8c03\u7684\u8bef\u7801\u7387\u516c\u5f0f\u5728\u65e0\u7ebf\u901a\u4fe1\u7cfb\u7edf\u4e2d\u6709\u7740\u5e7f\u6cdb\u7684\u5e94\u7528\u3002\u901a\u8fc7\u8ba1\u7b97\u8bef\u7801\u7387\uff0c\u6211\u4eec\u53ef\u4ee5\u8bc4\u4f30\u7cfb\u7edf\u7684\u6027\u80fd\uff0c\u5e76\u8fdb\u884c\u6027\u80fd\u4f18\u5316\u3002\u8bef\u7801\u7387\u516c\u5f0f\u53ef\u4ee5\u7528\u4e8e\u7cfb\u7edf\u8bbe\u8ba1\u3001\u53c2\u6570\u8c03\u6574\u548c\u6027\u80fd\u5206\u6790\u7b49\u65b9\u9762\u3002<\/p>\n\n\n\n \u3000\u3000\u6b64\u5916\uff0c\u8bef\u7801\u7387\u516c\u5f0f\u8fd8\u53ef\u4ee5\u7528\u4e8e\u8bef\u7801\u7387\u4eff\u771f\u548c\u5b9e\u9645\u7cfb\u7edf\u6d4b\u8bd5\u4e2d\u3002\u901a\u8fc7\u4eff\u771f\u548c\u6d4b\u8bd5\uff0c\u6211\u4eec\u53ef\u4ee5\u9a8c\u8bc1\u7406\u8bba\u5206\u6790\u7684\u51c6\u786e\u6027\uff0c\u5e76\u5bf9\u7cfb\u7edf\u8fdb\u884c\u6027\u80fd\u9a8c\u8bc1\u3002<\/p>\n\n\n\n \u3000\u3000\u672c\u6587\u8be6\u7ec6\u4ecb\u7ecd\u4e862FSK\u975e\u76f8\u5e72\u89e3\u8c03\u7684\u8bef\u7801\u7387\u516c\u5f0f\u53ca\u5176\u5e94\u7528\u3002\u901a\u8fc7\u5bf9\u8bef\u7801\u7387\u7684\u8ba1\u7b97\u548c\u5206\u6790\uff0c\u53ef\u4ee5\u8bc4\u4f30\u7cfb\u7edf\u7684\u6027\u80fd\uff0c\u5e76\u8fdb\u884c\u6027\u80fd\u4f18\u5316\u3002\u8bef\u7801\u7387\u516c\u5f0f\u5728\u65e0\u7ebf\u901a\u4fe1\u7cfb\u7edf\u4e2d\u6709\u7740\u5e7f\u6cdb\u7684\u5e94\u7528<\/strong>\uff0c\u5bf9\u7cfb\u7edf\u8bbe\u8ba1\u548c\u6027\u80fd\u5206\u6790\u5177\u6709\u91cd\u8981\u610f\u4e49\u3002\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4eff\u771f\u548c\u6d4b\u8bd5\u6765\u9a8c\u8bc1\u8bef\u7801\u7387\u516c\u5f0f\u7684\u51c6\u786e\u6027\uff0c\u5e76\u5bf9\u7cfb\u7edf\u8fdb\u884c\u6027\u80fd\u9a8c\u8bc1\u3002<\/p>\n","protected":false},"excerpt":{"rendered":" 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\u3000\u3000\u4e8c\u30012FSK\u975e\u76f8\u5e72\u89e3\u8c03\u8bef\u7801\u7387\u516c\u5f0f\u63a8\u5bfc<\/h2>\n\n\n\n
\u3000\u30001. \u63a5\u6536\u4fe1\u53f7\u6a21\u578b<\/h3>\n\n\n\n
\u3000\u30002. \u89e3\u8c03\u8fc7\u7a0b<\/h3>\n\n\n\n
\u3000\u30003. \u8bef\u7801\u7387\u8ba1\u7b97<\/h3>\n\n\n\n
\u3000\u3000\u4e09\u30012FSK\u975e\u76f8\u5e72\u89e3\u8c03\u8bef\u7801\u7387\u516c\u5f0f\u5e94\u7528<\/h2>\n\n\n\n
\u3000\u3000\u7ed3\u8bba\uff1a<\/h2>\n\n\n\n