{"id":3610,"date":"2023-06-16T10:09:21","date_gmt":"2023-06-16T02:09:21","guid":{"rendered":"\/\/www.dealsbon.com\/?p=3610"},"modified":"2023-06-16T10:09:25","modified_gmt":"2023-06-16T02:09:25","slug":"spzsxszyzms","status":"publish","type":"post","link":"\/\/www.dealsbon.com\/blog\/3610.html","title":{"rendered":"\u5c04\u9891\u566a\u58f0\u7cfb\u6570\u589e\u76ca\u600e\u4e48\u7b97\uff1f"},"content":{"rendered":"\n

\u3000\u3000\u5c04\u9891\u566a\u58f0\u7cfb\u6570\u589e\u76ca<\/strong>\u662f\u5c04\u9891\u7535\u8def\u4e2d\u4e00\u4e2a\u91cd\u8981\u7684\u53c2\u6570\uff0c\u5b83\u63cf\u8ff0\u4e86\u7535\u8def\u5728\u4fe1\u53f7\u4f20\u8f93\u8fc7\u7a0b\u4e2d\u566a\u58f0\u7684\u589e\u76ca\u3002\u5728\u5c04\u9891\u7535\u8def\u8bbe\u8ba1\u4e2d\uff0c\u566a\u58f0\u662f\u4e00\u4e2a\u4e0d\u53ef\u907f\u514d\u7684\u56e0\u7d20\uff0c\u56e0\u6b64\u5c04\u9891\u566a\u58f0\u7cfb\u6570\u589e\u76ca\u7684\u8ba1\u7b97\u548c\u4f18\u5316\u662f\u975e\u5e38\u5173\u952e\u7684\u3002\u672c\u6587\u5c06\u4ecb\u7ecd\u5c04\u9891\u566a\u58f0\u7cfb\u6570\u589e\u76ca\u7684\u8ba1\u7b97\u65b9\u6cd5\u548c\u4f18\u5316\u7b56\u7565\u3002<\/p>\n\n\n\n

\u3000\u3000\u4e00\u3001\u4ec0\u4e48\u662f\u5c04\u9891\u566a\u58f0\u7cfb\u6570\u589e\u76ca<\/h2>\n\n\n\n

\u3000\u3000\u5c04\u9891\u566a\u58f0\u7cfb\u6570\u589e\u76ca\u662f\u6307\u8f93\u5165\u4fe1\u53f7\u4e0e\u8f93\u51fa\u4fe1\u53f7\u4e4b\u95f4\u7684\u566a\u58f0\u529f\u7387\u6bd4\u503c\u3002\u5b83\u901a\u5e38\u7528 dB \u6765\u8868\u793a\u3002\u5177\u4f53\u5730\uff0c\u5c04\u9891\u566a\u58f0\u7cfb\u6570\u589e\u76ca\u5b9a\u4e49\u4e3a\uff1a<\/p>\n\n\n\n

\u3000\u3000NF = (SNR_in \/ SNR_out – 1) * 10 dB<\/strong><\/p>\n\n\n\n

\u3000\u3000\u5176\u4e2d\uff0cSNR_in \u662f\u8f93\u5165\u4fe1\u53f7\u7684\u4fe1\u566a\u6bd4\uff0cSNR_out \u662f\u8f93\u51fa\u4fe1\u53f7\u7684\u4fe1\u566a\u6bd4\u3002\u7b80\u5355\u5730\u8bf4\uff0c\u5c04\u9891\u566a\u58f0\u7cfb\u6570\u589e\u76ca\u662f\u6307\u5728\u4fe1\u53f7\u4f20\u8f93\u8fc7\u7a0b\u4e2d\uff0c\u4fe1\u53f7\u4e0e\u566a\u58f0\u529f\u7387\u7684\u6bd4\u503c\u53d1\u751f\u4e86\u591a\u5c11\u53d8\u5316\u3002<\/strong><\/p>\n\n\n\n

\u3000\u3000\u4e8c\u3001\u5c04\u9891\u566a\u58f0\u7cfb\u6570\u589e\u76ca\u7684\u8ba1\u7b97\u65b9\u6cd5<\/h2>\n\n\n\n

\u3000\u3000\u5c04\u9891\u566a\u58f0\u7cfb\u6570\u589e\u76ca\u7684\u8ba1\u7b97\u65b9\u6cd5\u53d6\u51b3\u4e8e\u7535\u8def\u7684\u7c7b\u578b\u548c\u7ed3\u6784\u3002\u4e00\u822c\u6765\u8bf4\uff0c\u5c04\u9891\u7535\u8def\u53ef\u4ee5\u5206\u4e3a\u4e24\u79cd\u7c7b\u578b\uff1a\u653e\u5927\u5668\u548c\u6df7\u9891\u5668\u3002\u4e0b\u9762\u5c06\u5206\u522b\u4ecb\u7ecd\u8fd9\u4e24\u79cd\u7535\u8def\u7684\u5c04\u9891\u566a\u58f0\u7cfb\u6570\u589e\u76ca\u8ba1\u7b97\u65b9\u6cd5\u3002<\/p>\n\n\n\n

\u3000\u30001. \u653e\u5927\u5668<\/h3>\n\n\n\n

\u3000\u3000\u653e\u5927\u5668\u662f\u5c04\u9891\u7535\u8def\u4e2d\u6700\u5e38\u89c1\u7684\u7535\u8def\u4e4b\u4e00\u3002\u5c04\u9891\u653e\u5927\u5668\u7684\u589e\u76ca\u548c\u566a\u58f0\u7cfb\u6570\u662f\u4e24\u4e2a\u91cd\u8981\u7684\u53c2\u6570\uff0c\u5b83\u4eec\u4e4b\u95f4\u901a\u5e38\u662f\u4e00\u79cd\u6743\u8861\u5173\u7cfb\u3002\u5728\u653e\u5927\u5668\u7684\u8bbe\u8ba1\u4e2d\uff0c\u9700\u8981\u901a\u8fc7\u9009\u62e9\u5408\u9002\u7684\u5668\u4ef6\u548c\u7535\u8def\u7ed3\u6784\u6765\u5b9e\u73b0\u589e\u76ca\u548c\u566a\u58f0\u7cfb\u6570\u7684\u5e73\u8861\u3002<\/p>\n\n\n\n

\u3000\u3000\u5c04\u9891\u653e\u5927\u5668\u7684\u566a\u58f0\u7cfb\u6570\u53ef\u4ee5\u901a\u8fc7\u5668\u4ef6\u7684\u566a\u58f0\u53c2\u6570\u548c\u7535\u8def\u7ed3\u6784\u6765\u8ba1\u7b97\u3002\u4e00\u822c\u6765\u8bf4\uff0c\u653e\u5927\u5668\u7684\u566a\u58f0\u7cfb\u6570\u53ef\u4ee5\u5206\u4e3a\u4e24\u90e8\u5206\uff1a\u5668\u4ef6\u566a\u58f0\u548c\u7535\u8def\u566a\u58f0\u3002\u5668\u4ef6\u566a\u58f0\u662f\u6307\u5668\u4ef6\u672c\u8eab\u7684\u566a\u58f0\uff0c\u5305\u62ec\u70ed\u566a\u58f0\u548c\u975e\u70ed\u566a\u58f0\u3002\u7535\u8def\u566a\u58f0\u662f\u6307\u7535\u8def\u7ed3\u6784\u5f15\u5165\u7684\u566a\u58f0\uff0c\u5305\u62ec\u8f93\u5165\u5339\u914d\u566a\u58f0\u3001\u8f93\u51fa\u5339\u914d\u566a\u58f0\u548c\u5185\u90e8\u566a\u58f0\u7b49\u3002<\/p>\n\n\n\n

\u3000\u3000\u653e\u5927\u5668\u7684\u603b\u566a\u58f0\u7cfb\u6570\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u516c\u5f0f\u8ba1\u7b97\uff1a<\/p>\n\n\n\n

\u3000\u3000NF = NF_min + (G – 1) * (NF_0 – NF_min)<\/strong><\/p>\n\n\n\n

\u3000\u3000\u5176\u4e2d\uff0cNF_min \u662f\u5668\u4ef6\u672c\u8eab\u7684\u6700\u5c0f\u566a\u58f0\u7cfb\u6570\uff0cG \u662f\u653e\u5927\u5668\u7684\u589e\u76ca\uff0cNF_0 \u662f\u7535\u8def\u7ed3\u6784\u7684\u6700\u5c0f\u566a\u58f0\u7cfb\u6570\u3002\u8be5\u516c\u5f0f\u5047\u8bbe\u7535\u8def\u4e2d\u7684\u6240\u6709\u566a\u58f0\u90fd\u662f\u52a0\u6027\u7684\u3002<\/strong><\/p>\n\n\n\n

\u3000\u30002. \u6df7\u9891\u5668<\/h3>\n\n\n\n

\u3000\u3000\u6df7\u9891\u5668\u662f\u5c04\u9891\u7535\u8def\u4e2d\u53e6\u4e00\u4e2a\u5e38\u89c1\u7684\u7535\u8def\u3002\u6df7\u9891\u5668\u7684\u4f5c\u7528\u662f\u5c06\u4e24\u4e2a\u4e0d\u540c\u9891\u7387\u7684\u4fe1\u53f7\u6df7\u5408\u5728\u4e00\u8d77\uff0c\u4ea7\u751f\u4e00\u4e2a\u65b0\u7684\u4fe1\u53f7\uff0c\u5176\u9891\u7387\u4e3a\u4e24\u4e2a\u539f\u59cb\u4fe1\u53f7\u9891\u7387\u7684\u5dee\u503c\u3002\u6df7\u9891\u5668\u7684\u566a\u58f0\u7cfb\u6570\u4e5f\u662f\u4e00\u4e2a\u91cd\u8981\u7684\u53c2\u6570\uff0c\u5b83\u901a\u5e38\u4f1a\u5f71\u54cd\u6df7\u9891\u5668\u7684\u7075\u654f\u5ea6\u548c\u52a8\u6001\u8303\u56f4\u3002<\/p>\n\n\n\n

\u3000\u3000\u6df7\u9891\u5668\u7684\u566a\u58f0\u7cfb\u6570\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u516c\u5f0f\u8ba1\u7b97\uff1a<\/p>\n\n\n\n

\u3000\u3000NF = NF_1 + NF_2 – 2 * G_1 – 2 * G_2 – 3 dB<\/strong><\/p>\n\n\n\n

\u3000\u3000\u5176\u4e2d\uff0cNF_1 \u548c NF_2 \u5206\u522b\u662f\u4e24\u4e2a\u8f93\u5165\u4fe1\u53f7\u7684\u566a\u58f0\u7cfb\u6570\uff0cG_1 \u548c G_2 \u5206\u522b\u662f\u4e24\u4e2a\u8f93\u5165\u4fe1\u53f7\u7684\u589e\u76ca\u3002\u8be5\u516c\u5f0f\u5047\u8bbe\u6df7\u9891\u5668\u4e2d\u7684\u6240\u6709\u566a\u58f0\u90fd\u662f\u52a0\u6027\u7684\u3002<\/strong><\/p>\n\n\n\n

\u3000\u3000\u4e09\u3001\u5c04\u9891\u566a\u58f0\u7cfb\u6570\u589e\u76ca\u7684\u4f18\u5316\u7b56\u7565<\/h2>\n\n\n\n

\u3000\u3000\u5c04\u9891\u566a\u58f0\u7cfb\u6570\u589e\u76ca\u7684\u4f18\u5316\u662f\u5c04\u9891\u7535\u8def\u8bbe\u8ba1\u4e2d\u7684\u4e00\u4e2a\u91cd\u8981\u95ee\u9898\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u7528\u7684\u4f18\u5316\u7b56\u7565\uff1a<\/p>\n\n\n\n

\u3000\u30001. \u9009\u62e9\u4f4e\u566a\u58f0\u5668\u4ef6<\/h3>\n\n\n\n

\u3000\u3000\u5728\u5c04\u9891\u7535\u8def\u8bbe\u8ba1\u4e2d\uff0c\u9009\u62e9\u4f4e\u566a\u58f0\u5668\u4ef6\u662f\u4e00\u4e2a\u91cd\u8981\u7684\u4f18\u5316\u7b56\u7565\u3002\u73b0\u4ee3\u5668\u4ef6\u5236\u9020\u6280\u672f\u5df2\u7ecf\u53ef\u4ee5\u5b9e\u73b0\u975e\u5e38\u4f4e\u7684\u566a\u58f0\u7cfb\u6570\uff0c\u56e0\u6b64\u6b63\u786e\u9009\u62e9\u4f4e\u566a\u58f0\u5668\u4ef6\u53ef\u4ee5\u6709\u6548\u5730\u964d\u4f4e\u7535\u8def\u7684\u566a\u58f0\u7cfb\u6570\u3002<\/p>\n\n\n\n

\u3000\u30002. \u4f18\u5316\u7535\u8def\u7ed3\u6784<\/h3>\n\n\n\n

\u3000\u3000\u7535\u8def\u7ed3\u6784\u7684\u4f18\u5316\u4e5f\u662f\u4e00\u4e2a\u91cd\u8981\u7684\u4f18\u5316\u7b56\u7565\u3002\u5728\u5c04\u9891\u7535\u8def\u8bbe\u8ba1\u4e2d\uff0c\u4f18\u5316\u8f93\u5165\u548c\u8f93\u51fa\u5339\u914d\u7535\u8def\u53ef\u4ee5\u6709\u6548\u5730\u964d\u4f4e\u566a\u58f0\u7cfb\u6570\u3002\u6b64\u5916\uff0c\u5408\u7406\u8bbe\u8ba1\u7535\u8def\u7684\u5e03\u5c40\u548c\u63a5\u5730\u65b9\u5f0f\u4e5f\u53ef\u4ee5\u6709\u6548\u5730\u964d\u4f4e\u566a\u58f0\u7cfb\u6570\u3002<\/p>\n\n\n\n

\u3000\u30003. \u964d\u4f4e\u7535\u8def\u589e\u76ca<\/h3>\n\n\n\n

\u3000\u3000\u5728\u4e00\u4e9b\u5e94\u7528\u4e2d\uff0c\u964d\u4f4e\u7535\u8def\u7684\u589e\u76ca\u53ef\u4ee5\u6709\u6548\u5730\u964d\u4f4e\u566a\u58f0\u7cfb\u6570\u3002\u8fd9\u662f\u56e0\u4e3a\u566a\u58f0\u7cfb\u6570\u901a\u5e38\u4e0e\u7535\u8def\u7684\u589e\u76ca\u6210\u53cd\u6bd4\u4f8b\u5173\u7cfb\u3002\u56e0\u6b64\uff0c\u5728\u4e00\u4e9b\u7075\u654f\u5ea6\u8981\u6c42\u4e0d\u9ad8\u7684\u5e94\u7528\u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u964d\u4f4e\u7535\u8def\u7684\u589e\u76ca\u6765\u964d\u4f4e\u566a\u58f0\u7cfb\u6570\u3002<\/p>\n\n\n\n

\u3000\u3000\u603b\u4e4b\uff0c\u5c04\u9891\u566a\u58f0\u7cfb\u6570\u589e\u76ca\u662f\u5c04\u9891\u7535\u8def\u8bbe\u8ba1\u4e2d\u4e00\u4e2a\u975e\u5e38\u91cd\u8981\u7684\u53c2\u6570\u3002\u6b63\u786e\u5730\u8ba1\u7b97\u548c\u4f18\u5316\u5c04\u9891\u566a\u58f0\u7cfb\u6570\u589e\u76ca\u53ef\u4ee5\u63d0\u9ad8\u5c04\u9891\u7535\u8def\u7684\u6027\u80fd\u548c\u53ef\u9760\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

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