{"id":100,"date":"2025-07-06T22:35:59","date_gmt":"2025-07-06T14:35:59","guid":{"rendered":"http:\/\/www.thebg5hvn.top\/?p=100"},"modified":"2025-07-07T09:02:59","modified_gmt":"2025-07-07T01:02:59","slug":"%f0%9f%93%a1-%e5%9c%b0%e7%90%83%e7%ab%99%e7%94%b5%e7%a3%81%e7%8e%af%e5%a2%83%e6%b5%8b%e8%af%95%ef%bc%9a%e5%b9%b2%e6%89%b0%e5%ae%b9%e9%99%90%e8%ae%a1%e7%ae%97%e4%b8%8e%e6%b5%8b%e8%af%95%e7%b3%bb","status":"publish","type":"post","link":"https:\/\/thebg5hvn.top\/index.php\/2025\/07\/06\/%f0%9f%93%a1-%e5%9c%b0%e7%90%83%e7%ab%99%e7%94%b5%e7%a3%81%e7%8e%af%e5%a2%83%e6%b5%8b%e8%af%95%ef%bc%9a%e5%b9%b2%e6%89%b0%e5%ae%b9%e9%99%90%e8%ae%a1%e7%ae%97%e4%b8%8e%e6%b5%8b%e8%af%95%e7%b3%bb\/","title":{"rendered":"\ud83d\udce1 \u5730\u7403\u7ad9\u7535\u78c1\u73af\u5883\u6d4b\u8bd5\uff1a\u5e72\u6270\u5bb9\u9650\u8ba1\u7b97\u4e0e\u6d4b\u8bd5\u7cfb\u7edf\u6821\u6838\u5168\u6d41\u7a0b\u68b3\u7406"},"content":{"rendered":"\n<h1 class=\"wp-block-heading\">\ud83e\udded \u80cc\u666f\u8bf4\u660e<\/h1>\n\n\n\n<p>\u5728\u536b\u661f\u5730\u7403\u7ad9\u5efa\u7ad9\u524d\uff0c\u4f9d\u636e\u56fd\u5bb6\u6807\u51c6 <em>\u300aGB\/T 13615\u20142009 \u5730\u7403\u7ad9\u7535\u78c1\u73af\u5883\u4fdd\u62a4\u8981\u6c42\u300b<\/em>\uff0c\u5fc5\u987b\u5bf9\u573a\u5740\u7535\u78c1\u73af\u5883\u8fdb\u884c\u6d4b\u8bd5\uff0c\u786e\u8ba4\u662f\u5426\u5b58\u5728\u8d85\u6807\u5e72\u6270\u4fe1\u53f7\u3002<\/p>\n\n\n\n<p>\u672c\u6587\u4ee5\u67d0 X \u6ce2\u6bb5 3 \u7c73\u536b\u661f\u5730\u7403\u7ad9\u4e3a\u4f8b\uff0c\u5b8c\u6574\u68b3\u7406\u4ece\u8bef\u7801\u7387\u8981\u6c42\u51fa\u53d1\u3001\u63a8\u5bfc\u5e72\u6270\u5bb9\u9650\u5e76\u6362\u7b97\u4e3a\u9891\u8c31\u4eea\u5224\u636e\u503c\u7684\u5168\u8fc7\u7a0b\uff0c\u7279\u522b\u5f3a\u8c03\u5b9e\u9645\u94fe\u8def\u53c2\u6570\u4e0e\u6d4b\u8bd5\u7cfb\u7edf\u4e4b\u95f4\u7684\u8f6c\u6362\u903b\u8f91\uff0c\u4ee5\u907f\u514d\u8bef\u89e3\u548c\u8bef\u5224\u3002<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83d\udcca \u7cfb\u7edf\u8bbe\u8ba1\u53c2\u6570\uff08\u8f93\u5165\u6761\u4ef6\uff09<\/h2>\n\n\n\n<p>\u4ee5\u4e0b\u53c2\u6570\u7531\u59d4\u6258\u65b9\u6216\u7cfb\u7edf\u8bbe\u8ba1\u65b9\u63d0\u4f9b\uff0c\u4f5c\u4e3a\u5e72\u6270\u5bb9\u9650\u63a8\u5bfc\u4e0e\u6d4b\u8bd5\u7cfb\u7edf\u6821\u6838\u7684\u57fa\u7840\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u53c2\u6570\u7b26\u53f7<\/th><th>\u6570\u503c\u53ca\u5355\u4f4d<\/th><th>\u542b\u4e49\u8bf4\u660e<\/th><\/tr><\/thead><tbody><tr><td>\\(\\text{BER}\\)<\/td><td>\\(\\leq 10^{-7}\\)<\/td><td>\u901a\u4fe1\u7cfb\u7edf\u6700\u5927\u5141\u8bb8\u8bef\u7801\u7387\u76ee\u6807<\/td><\/tr><tr><td>\\(E_b\/N_0\\)<\/td><td>5.4 dB<\/td><td>\u8fbe\u6210 BER \u6240\u9700\u7684\u6700\u5c0f\u6bcf\u6bd4\u7279\u4fe1\u566a\u6bd4<\/td><\/tr><tr><td>\\(R_b\\)<\/td><td>7 Mbps<\/td><td>\u6709\u6548\u4e1a\u52a1\u6bd4\u7279\u7387<\/td><\/tr><tr><td>\\(B\\)<\/td><td>33.75 MHz<\/td><td>\u4fe1\u9053\u5e26\u5bbd\uff08\u5c04\u9891\u901a\u9053\u5bbd\u5ea6\uff09<\/td><\/tr><tr><td>\\(\\text{EIRP}\\)<\/td><td>59 dBm<\/td><td>\u536b\u661f\u53d1\u5c04\u7b49\u6548\u5168\u5411\u8f90\u5c04\u529f\u7387<\/td><\/tr><tr><td>\\(L_s\\)<\/td><td>177 dB<\/td><td>\u81ea\u7531\u7a7a\u95f4\u8def\u5f84\u635f\u8017\uff08\u8ba1\u7b97\u83b7\u5f97\uff0c\u6b64\u5904\u7565\uff09<\/td><\/tr><tr><td>\\(G_r\\)<\/td><td>44.1 dBi<\/td><td>\u63a5\u6536\u5929\u7ebf\u4e3b\u74e3\u6700\u5927\u589e\u76ca<\/td><\/tr><tr><td>\\(G(5^\\circ)\\)<\/td><td>15.7 dBi<\/td><td>\u5929\u7ebf\u5728 5\u00b0 \u4ef0\u89d2\u65b9\u5411\u7684\u589e\u76ca\uff08\u65b9\u5411\u56fe\u67e5\u5f97\uff09<\/td><\/tr><tr><td>\\(b\\)<\/td><td>5 dB<\/td><td>\u63a5\u6536\u7aef\u9988\u7ebf\u635f\u8017<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83d\udd01 \u63a8\u5bfc\u94fe\u6761<\/h2>\n\n\n\n<pre class=\"wp-block-preformatted\">1.\u5f15\u7528\u7cfb\u7edf\u8bbe\u8ba1\u8981\u6c42\u4e2d\u7684 Eb\/N0\uff08\u63a5\u6536\u673a\u7aef\u53e3\uff09 \ud83e\udde0<br>  \u2514\u25b6 \u7531 BER \u53cd\u63a8\u7cfb\u7edf\u6700\u4f4e\u6027\u80fd\u6307\u6807<br><br>2.\u6362\u7b97 C\/N\uff08\u8f7d\u566a\u6bd4\uff09 \u2696\ufe0f<br>  \u2514\u25b6 Eb\/N0 \u7ecf\u901f\u7387\u4e0e\u5e26\u5bbd\u6362\u7b97\u4e3a C\/N\uff08\u8f7d\u566a\u6bd4\uff09<br><br>3.\u5f15\u5165\u5e72\u6270\u5bb9\u9650 C\/I \ud83d\udcf6<br>  \u2514\u25b6 \u4f9d\u636e\u6807\u51c6\u63a8\u8350\u88d5\u91cf\uff0c\u5c06 C\/N \u63d0\u5347 10dB\uff0c\u6362\u7b97\u4e3a C\/I\uff08\u8f7d\u5e72\u6bd4\uff09<br><br>4.\u63a8\u5bfc Pin\uff08\u63a5\u6536\u673a\u6700\u5927\u5bb9\u8bb8\u5e72\u6270\u7535\u5e73\uff09 \ud83c\udfaf<br>  \u2514\u25b6 \u7528 C\/I \u4e0e\u6709\u7528\u4fe1\u53f7\u529f\u7387 C \u53cd\u63a8\u51fa\u6700\u5927\u5e72\u6270\u529f\u7387 Pin<br><br>5.\u6298\u7b97 PR\uff08\u5730\u7403\u7ad9\u5929\u7ebf\u53e3\u9762\u5e72\u6270\u9650\u503c\uff09 \ud83d\udce1<br>  \u2514\u25b6 \u5c06 Pin \u8003\u8651\u5929\u7ebf\u65b9\u5411\u589e\u76ca\u4e0e\u9988\u7ebf\u635f\u8017\uff0c\u6298\u7b97\u4e3a PR<br><br>6.\u6362\u7b97 PT\uff08\u9891\u8c31\u4eea\u6700\u5927\u5bb9\u8bb8\u8bfb\u6570\uff09 \ud83e\uddea<br>  \u2514\u25b6 \u5f15\u5165\u6d4b\u8bd5\u7cfb\u7edf\u53c2\u6570\uff0c\u5c06 PR \u6298\u7b97\u4e3a\u4eea\u8868\u5224\u636e\u503c PT<br><br>7.\u9a8c\u8bc1\u6d4b\u8bd5\u7cfb\u7edf\u7075\u654f\u5ea6\u662f\u5426\u6ee1\u8db3\u6d4b\u8bd5\u8981\u6c42 \ud83d\udee1\ufe0f<br>  \u2514\u25b6 \u6d4b\u8bd5\u7cfb\u7edf\u7075\u654f\u5ea6\u662f\u5426\u7559\u6709\u8db3\u591f\u88d5\u5ea6\u68c0\u6d4b\u5e72\u6270\u9650\u503c<br><br>8.\u5bf9\u7167\u5b9e\u6d4b\u503c\u5224\u65ad\u662f\u5426\u5408\u683c \u2705 \/ \u274c<br>  \u2514\u25b6 \u82e5\u5b9e\u6d4b \u2264 PT\uff0c\u5219\u5224\u5b9a\u7535\u78c1\u73af\u5883\u5408\u683c\uff0c\u5426\u5219\u89c6\u4e3a\u5b58\u5728\u8d85\u6807\u5e72\u6270<br><\/pre>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83d\udcd0 \u6b65\u9aa4\u8be6\u89e3\u4e0e\u516c\u5f0f\u63a8\u5bfc<\/h2>\n\n\n\n<p><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u2705 Step 1\uff1a\u5f15\u7528\u7cfb\u7edf\u8bbe\u8ba1\u8981\u6c42\u4e2d\u7684 Eb\/N\u2080<\/h3>\n\n\n\n<p>\u76ee\u6807\u8bef\u7801\u7387\u7531\u901a\u4fe1\u7cfb\u7edf\u8bbe\u8ba1\u65b9\u63d0\u4f9b\uff1a<\/p>\n\n\n\n<p>$$ \\text{BER} \\leq 10^{-7} $$<\/p>\n\n\n\n<p>\u4e3a\u5b9e\u73b0\u8be5 BER\uff0c\u7cfb\u7edf\u9700\u6ee1\u8db3\uff1a<\/p>\n\n\n\n<p>$$ E_b\/N_0 = 5.4\\,\\text{dB} $$<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>BER<\/strong>\uff1aBit Error Rate\uff0c\u6bd4\u7279\u8bef\u7801\u7387<\/li>\n\n\n\n<li><strong>Eb\/N\u2080<\/strong>\uff1a\u6bcf\u6bd4\u7279\u80fd\u91cf\u4e0e\u566a\u58f0\u529f\u7387\u8c31\u5bc6\u5ea6\u7684\u6bd4\u503c\uff0c\u5355\u4f4d\u4e3a dB<\/li>\n<\/ul>\n\n\n\n<p><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u2705 Step 2\uff1a\u6362\u7b97\u4e3a\u8f7d\u566a\u6bd4 C\/N<\/h3>\n\n\n\n<p>Eb\/N\u2080 \u4e3a\u8c03\u5236\u57df\u6307\u6807\uff0c\u505a\u7535\u6d4b\u8bc4\u4f30\u9700\u8f6c\u6362\u4e3a\u5c04\u9891\u57df\u6307\u6807\uff0c\u6545\u5c06 Eb\/N\u2080 \u6362\u7b97\u4e3a\u8f7d\u566a\u6bd4\uff0c\u4ece\u800c\u4e3a\u8ba1\u7b97\u5e72\u6270\u95e8\u9650\u63d0\u4f9b\u57fa\u7840\uff1a<\/p>\n\n\n\n<p>$$ C\/N = E_b\/N_0 + 10 \\log_{10} \\left( \\frac{R_b}{B} \\right) $$<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>R<sub>b<\/sub><\/strong>\uff1a\u4e1a\u52a1\u6bd4\u7279\u7387\uff0c7 Mbps<\/li>\n\n\n\n<li><strong>B<\/strong>\uff1a\u63a5\u6536\u4fe1\u9053\u5e26\u5bbd\uff0c33.75 MHz<\/li>\n<\/ul>\n\n\n\n<p>\u4ee3\u5165\u8ba1\u7b97\uff1a<\/p>\n\n\n\n<p>$$ C\/N = 5.4 + 10 \\log_{10}(7 \/ 33.75) = -1.43\\,\\text{dB} $$<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u2705 Step 3\uff1a\u7531 C\/N \u8f6c\u6362\u4e3a C\/I\uff08\u5f15\u5165\u5e72\u6270\u5bb9\u9650\uff09<\/h3>\n\n\n\n<p>\u867d\u7136\u901a\u4fe1\u7cfb\u7edf\u7684 BER \u8981\u6c42\u6700\u7ec8\u4f53\u73b0\u4e3a\u5bf9 C\/N \u7684\u7ea6\u675f\uff0c\u4f46\u5b9e\u9645\u7535\u78c1\u73af\u5883\u8bc4\u4f30\u65f6\uff0c\u7cfb\u7edf\u6240\u627f\u53d7\u7684\u662f\u5e72\u6270\u4fe1\u53f7\u800c\u975e\u7eaf\u968f\u673a\u566a\u58f0\u3002\u56e0\u6b64\uff0c\u9700\u8981\u5c06 C\/N \u6362\u7b97\u4e3a\u6297\u5e72\u6270\u80fd\u529b\u6307\u6807 C\/I\u3002<\/p>\n\n\n\n<p><strong>\ud83d\udcce \u5de5\u7a0b\u8bf4\u660e\uff1a<\/strong>\u6839\u636e\u300aGB\/T 13615-2009\u300b\u9644\u5f55 A \u6240\u4f53\u73b0\u7684\u8ba1\u7b97\u539f\u5219\uff0c\u4ee5\u53ca\u901a\u4fe1\u5de5\u7a0b\u901a\u7528\u7ecf\u9a8c\uff0c\u4e3a\u4fdd\u969c\u901a\u4fe1\u7cfb\u7edf\u5728\u5e72\u6270\u73af\u5883\u4e0b\u7684\u6b63\u5e38\u8fd0\u884c\uff0c\u901a\u5e38\u5f15\u5165 <strong>10 dB<\/strong> \u7684\u5e72\u6270\u4fdd\u62a4\u88d5\u91cf\uff1a<\/p>\n\n\n\n<p><strong>$$ C\/I = C\/N + 10\\,\\text{dB} $$<\/strong><\/p>\n\n\n\n<p>\u5df2\u77e5\u4e0a\u4e00\u8282\u4e2d\u6362\u7b97\u5f97\u5230\uff1a<\/p>\n\n\n\n<p><strong>$$ C\/N = -1.43\\,\\text{dB} $$<\/strong><\/p>\n\n\n\n<p>\u5219\u6709\uff1a<\/p>\n\n\n\n<p><strong>$$ C\/I = -1.43 + 10 = 8.57\\,\\text{dB} $$<\/strong><\/p>\n\n\n\n<p>\u8be5\u6362\u7b97\u7ed3\u679c\u5c06\u4f5c\u4e3a\u540e\u7eed\u8ba1\u7b97\u6700\u5927\u5141\u8bb8\u5e72\u6270\u529f\u7387 P<sub>in<\/sub> \u7684\u57fa\u7840\u3002<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u2705 Step 4\uff1a\u8ba1\u7b97\u63a5\u6536\u673a\u6700\u5927\u5bb9\u8bb8\u5e72\u6270\u7535\u5e73 P<sub>in<\/sub><\/h3>\n\n\n\n<p>\u6839\u636e\u516c\u5f0f\uff1a<\/p>\n\n\n\n<p><strong>$$ P_{\\text{in}} = C &#8211; C\/I $$<\/strong><\/p>\n\n\n\n<p>\u5df2\u77e5\u63a5\u6536\u673a\u8f93\u5165\u7aef\u6709\u7528\u4fe1\u53f7\u529f\u7387\uff1a<\/p>\n\n\n\n<p><strong>$$ C = -109.2\\,\\text{dBm} $$<\/strong><\/p>\n\n\n\n<p>\u4ee3\u5165\u5f97\uff1a<\/p>\n\n\n\n<p><strong>$$ P_{\\text{in}} = -109.2 &#8211; 8.57 = -117.8\\,\\text{dBm} $$<\/strong><\/p>\n\n\n\n<p>\u8fd9\u8868\u793a\uff1a\u82e5\u5e72\u6270\u4fe1\u53f7\u529f\u7387\u9ad8\u4e8e \u2013117.8 dBm\uff0c\u5c06\u53ef\u80fd\u5bf9\u63a5\u6536\u673a\u6b63\u5e38\u63a5\u6536\u6784\u6210\u5a01\u80c1\u3002<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u2705 Step 5\uff1a\u6298\u7b97\u4e3a\u5b9e\u9645\u5de5\u4f5c\u7cfb\u7edf\u7684\u5929\u7ebf\u53e3\u9762\u5e72\u6270\u5bb9\u9650 P<sub>R<\/sub><\/h3>\n\n\n\n<p>\u8003\u8651\u9988\u7ebf\u635f\u8017\u548c\u5929\u7ebf\u65b9\u5411\u589e\u76ca\uff1a<\/p>\n\n\n\n<p>$$ P_R = P_{in} + b &#8211; G(\\varphi) $$<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>b<\/strong>\uff1a\u9988\u7ebf\u635f\u8017\uff08\u63a5\u6536\u7aef\uff09\uff0c5 dB<\/li>\n\n\n\n<li><strong>G(5\u00b0)<\/strong>\uff1a\u63a5\u6536\u5929\u7ebf\u5728 5\u00b0 \u65b9\u4f4d\u7684\u589e\u76ca\uff0c15.7 dBi\uff0c\u6839\u636e\u300aGB\/T 13615-2009\u300b\u9644\u5f55 A \u8981\u6c42\uff0c\u63a5\u6536\u5929\u7ebf\u5728\u5e72\u6270\u65b9\u5411\u4e0a\u7684\u589e\u76ca\u53ef\u4f9d\u636e\u5929\u7ebf\u65b9\u5411\u56fe\u6216\u5236\u9020\u5546\u63d0\u4f9b\u6570\u636e\u786e\u5b9a\u3002<\/li>\n\n\n\n<li>\u672c\u6b21\u53d6 5\u00b0 \u4ef0\u89d2\u5bf9\u5e94\u7684\u589e\u76ca\u503c\uff0c\u4e3b\u8981\u8003\u8651\u5b9e\u9645\u5de5\u4f5c\u573a\u666f\u4e2d\u5730\u7403\u7ad9\u5929\u7ebf\u6700\u5c0f\u5de5\u4f5c\u4ef0\u89d2\u4e3a 5\u00b0\uff0c\u4e14\u5e72\u6270\u4fe1\u53f7\u901a\u5e38\u5047\u8bbe\u6765\u81ea\u4e8e\u6bd4\u62df\u5efa\u7ad9\u5730\u70b9\u6d77\u62d4\u66f4\u4f4e\u7684\u5730\u9762\u65b9\u5411<\/li>\n<\/ul>\n\n\n\n<p>$$ P_R = -117.8 + 5 &#8211; 15.7 = -128.5\\,\\text{dBm} $$<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u2705 Step 6\uff1a\u6362\u7b97\u4e3a\u9891\u8c31\u4eea\u6700\u5927\u5bb9\u8bb8\u8bfb\u6570 P<sub>T<\/sub><\/h3>\n\n\n\n<p>\u6d4b\u8bd5\u7cfb\u7edf\u94fe\u8def\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">\u6d4b\u8bd5\u5929\u7ebf \u2192 LNA \u2192 \u9988\u7ebf \u2192 \u9891\u8c31\u4eea<\/pre>\n\n\n\n<p>\u516c\u5f0f\uff1a<\/p>\n\n\n\n<p>$$ P_T = P_R + G_{LNA} + G_{ant} &#8211; L_{cable} $$<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>G<sub>LNA<\/sub><\/strong>\uff1a\u524d\u7f6e\u653e\u5927\u5668\u589e\u76ca\uff0c50.3 dB<\/li>\n\n\n\n<li><strong>G<sub>ant<\/sub><\/strong>\uff1a\u6d4b\u8bd5\u5929\u7ebf\u589e\u76ca\uff0c29 dBi<\/li>\n\n\n\n<li><strong>L<sub>cable<\/sub><\/strong>\uff1a\u6d4b\u8bd5\u7cfb\u7edf\u9988\u7ebf\u635f\u8017\uff0c4 dB<\/li>\n<\/ul>\n\n\n\n<p>\u8ba1\u7b97\uff1a<\/p>\n\n\n\n<p>$$ P_T = -128.5 + 50.3 + 29 &#8211; 4 = -53.2\\,\\text{dBm} $$<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u2705 Step 7\uff1a\u9a8c\u8bc1\u7cfb\u7edf\u7075\u654f\u5ea6<\/h3>\n\n\n\n<p>\u6d4b\u8bd5\u7cfb\u7edf\u672c\u5e95\u566a\u58f0\u4e3a\uff08\u672c\u5e95\u503c\u4e3a\u642d\u5efa\u6d4b\u8bd5\u7cfb\u7edf\u540e\u76f4\u63a5\u8bfb\u53d6\u9891\u8c31\u4eea\u6240\u5f97\uff0c\u5b9e\u9645\u5de5\u51b5\u4e0b\u4f18\u4e8e\u7406\u8bba\u63a8\u5bfc\u6cd5\uff08\u4f8b\u5982\u901a\u8fc7\u7cfb\u7edf\u566a\u58f0\u6e29\u5ea6\u3001kTB \u4f30\u7b97\uff09\uff0c\u66f4\u80fd\u771f\u5b9e\u53cd\u6620\u6d4b\u8bd5\u7075\u654f\u5ea6\u3002\uff09\uff1a<\/p>\n\n\n\n<p>$$ N_{sys} = -85.9\\,\\text{dBm\/10kHz} $$<\/p>\n\n\n\n<p>\u7075\u654f\u5ea6\u88d5\u5ea6\uff08\u4e00\u822c\u226510dB\u8f83\u7406\u60f3\uff0c\u4ee5\u907f\u514d\u7cfb\u7edf\u7075\u654f\u5ea6\u6ce2\u52a8\u5f71\u54cd\u5224\u636e\u5224\u65ad\u3002\uff09\uff1a<\/p>\n\n\n\n<p>$$ \\Delta = P_T &#8211; N_{sys} = -53.2 &#8211; (-85.9) = 32.7\\,\\text{dB} $$<\/p>\n\n\n\n<p>\u6d4b\u8bd5\u7cfb\u7edf\u7075\u654f\u5ea6\u8db3\u591f\u8fdb\u884c\u5e72\u6270\u4fe1\u53f7\u5224\u5b9a\u3002<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u2705 Step 8\uff1a\u5224\u65ad\u6807\u51c6<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><th>\u6d4b\u8bd5\u503c<\/th><th>\u5224\u5b9a<\/th><\/tr><tr><td>\u2264 -53.2 dBm<\/td><td>\u2705 \u5408\u683c<\/td><\/tr><tr><td>\uff1e -53.2 dBm<\/td><td>\u274c \u8d85\u9650<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83d\udccc \u603b\u7ed3<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4ece BER \u6307\u6807\u51fa\u53d1\uff0c\u4f9d\u6b21\u63a8\u5bfc\uff1aEb\/N\u2080 \u2192 C\/N \u2192 C\/I \u2192 P<sub>in<\/sub> \u2192 P<sub>R<\/sub> \u2192 P<sub>T<\/sub>\uff1b<\/li>\n\n\n\n<li>\u660e\u786e\u533a\u5206\u901a\u4fe1\u7cfb\u7edf\u4e0e\u6d4b\u8bd5\u7cfb\u7edf\u6307\u6807\uff1b<\/li>\n\n\n\n<li>\u5efa\u7acb\u4ece\u94fe\u8def\u7406\u8bba\u5bb9\u9650 \u2192 \u5b9e\u6d4b\u9891\u8c31\u4eea\u5224\u636e \u7684\u5b8c\u6574\u8f6c\u6362\u94fe\u8def\uff1b<\/li>\n\n\n\n<li>\u63d0\u4f9b\u65e0\u7ebf\u7535\u7ba1\u7406\u5b9e\u52a1\u4e2d\u53ef\u843d\u5730\u3001\u53ef\u8ffd\u6eaf\u7684\u6807\u51c6\u6d41\u7a0b\u3002<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\ud83e\udded \u80cc\u666f\u8bf4\u660e \u5728\u536b\u661f\u5730\u7403\u7ad9\u5efa\u7ad9\u524d\uff0c\u4f9d\u636e\u56fd\u5bb6\u6807\u51c6 \u300aGB\/T 13615\u20142009 \u5730\u7403\u7ad9\u7535\u78c1\u73af\u5883\u4fdd\u62a4\u8981\u6c42\u300b\uff0c\u5fc5 &#8230; <a title=\"\ud83d\udce1 \u5730\u7403\u7ad9\u7535\u78c1\u73af\u5883\u6d4b\u8bd5\uff1a\u5e72\u6270\u5bb9\u9650\u8ba1\u7b97\u4e0e\u6d4b\u8bd5\u7cfb\u7edf\u6821\u6838\u5168\u6d41\u7a0b\u68b3\u7406\" class=\"read-more\" href=\"https:\/\/thebg5hvn.top\/index.php\/2025\/07\/06\/%f0%9f%93%a1-%e5%9c%b0%e7%90%83%e7%ab%99%e7%94%b5%e7%a3%81%e7%8e%af%e5%a2%83%e6%b5%8b%e8%af%95%ef%bc%9a%e5%b9%b2%e6%89%b0%e5%ae%b9%e9%99%90%e8%ae%a1%e7%ae%97%e4%b8%8e%e6%b5%8b%e8%af%95%e7%b3%bb\/\" aria-label=\"\u9605\u8bfb \ud83d\udce1 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