{"id":6174,"date":"2023-07-11T21:55:01","date_gmt":"2023-07-11T13:55:01","guid":{"rendered":"\/\/www.dealsbon.com\/?p=6174"},"modified":"2023-09-25T10:31:52","modified_gmt":"2023-09-25T02:31:52","slug":"glzydzmhs","status":"publish","type":"post","link":"\/\/www.dealsbon.com\/blog\/6174.html","title":{"rendered":"\u529f\u7387\u589e\u76cadb\u600e\u4e48\u6362\u7b97\uff1f"},"content":{"rendered":"\n
\u3000\u3000\u5728\u7535\u5b50\u9886\u57df\u4e2d\uff0c\u529f\u7387\u589e\u76ca\u662f\u4e00\u4e2a\u975e\u5e38\u91cd\u8981\u7684\u6982\u5ff5\uff0c\u901a\u5e38\u7528\u6765\u8861\u91cf\u653e\u5927\u5668\u7684\u6027\u80fd\u3002\u800c\u529f\u7387\u589e\u76ca\u7684\u5355\u4f4d\u901a\u5e38\u662fdb\uff0c\u4f46\u662f\u5f88\u591a\u4eba\u4e0d\u77e5\u9053\u5982\u4f55\u5c06\u5176\u8f6c\u5316\u4e3a\u5176\u4ed6\u5355\u4f4d\u3002\u56e0\u6b64\uff0c\u672c\u6587\u5c06\u4f1a\u4ecb\u7ecd\u529f\u7387\u589e\u76cadb\u7684\u6362\u7b97\u65b9\u6cd5\u3002<\/p>\n\n\n\n
\u3000\u3000\u529f\u7387\u589e\u76ca\u662f\u6307\u4fe1\u53f7\u5728\u901a\u8fc7\u653e\u5927\u5668\u540e\u7684\u8f93\u51fa\u529f\u7387\u4e0e\u8f93\u5165\u529f\u7387\u4e4b\u6bd4\u3002\u901a\u5e38\u7528\u516c\u5f0f\u8868\u793a\u4e3a\uff1a<\/p>\n\n\n\n
\u3000\u3000\u529f\u7387\u589e\u76ca(G) = \u8f93\u51fa\u529f\u7387(Pout) \/ \u8f93\u5165\u529f\u7387(Pin)<\/strong><\/p>\n\n\n\n \u3000\u3000\u529f\u7387\u589e\u76ca\u7684\u5355\u4f4d\u901a\u5e38\u662fdb\uff0c\u5373\u5206\u8d1d\u3002\u5206\u8d1d\u662f\u4e00\u4e2a\u65e0\u91cf\u7eb2\u7684\u5355\u4f4d\uff0c\u901a\u5e38\u7528\u6765\u8868\u793a\u4e24\u4e2a\u529f\u7387\u4e4b\u6bd4\u3002\u5728\u7535\u5b50\u9886\u57df\u4e2d\uff0c\u6211\u4eec\u901a\u5e38\u4f7f\u7528db\u6765\u8868\u793a\u529f\u7387\u589e\u76ca\u3001\u4fe1\u566a\u6bd4\u7b49\u6307\u6807\u3002<\/strong><\/p>\n\n\n\n \u3000\u3000\u529f\u7387\u589e\u76cadb\u4e0e\u500d\u6570\u4e4b\u95f4\u7684\u6362\u7b97\u516c\u5f0f\u4e3a\uff1a<\/p>\n\n\n\n \u3000\u3000G(db) = 10log10(G)<\/strong><\/p>\n\n\n\n \u3000\u3000\u5176\u4e2d\uff0cG\u4e3a\u500d\u6570\u3002\u4f8b\u5982\uff0c\u5f53G=2\u65f6\uff0c\u529f\u7387\u589e\u76ca\u4e3a3db;\u5f53G=10\u65f6\uff0c\u529f\u7387\u589e\u76ca\u4e3a10db\u3002<\/p>\n\n\n\n \u3000\u3000\u5728\u7535\u5b50\u9886\u57df\u4e2d\uff0c\u6211\u4eec\u901a\u5e38\u4f7f\u7528dbm\u6765\u8868\u793a\u529f\u7387\u3002dbm\u662f\u4ee51\u6beb\u74e6\u4e3a\u53c2\u8003\u7684\u529f\u7387\u5355\u4f4d\u3002\u56e0\u6b64\uff0c\u6211\u4eec\u53ef\u4ee5\u5c06dbm\u8f6c\u5316\u4e3a\u74e6\u7279\uff0c\u65b9\u6cd5\u5982\u4e0b\uff1a<\/p>\n\n\n\n \u3000\u3000P(W) = 10^(P(dbm)\/10-3)<\/strong><\/p>\n\n\n\n \u3000\u3000\u5176\u4e2d\uff0cP(dbm)\u4e3adbm\u503c\u3002\u4f8b\u5982\uff0c\u5f53P(dbm)=20\u65f6\uff0c\u5bf9\u5e94\u7684\u529f\u7387\u4e3a0.1\u74e6\u7279\u3002<\/p>\n\n\n\n\u3000\u3000\u4e8c\u3001\u529f\u7387\u589e\u76ca\u7684\u5355\u4f4d<\/h2>\n\n\n\n
\u3000\u3000\u4e09\u3001\u529f\u7387\u589e\u76cadb\u7684\u6362\u7b97<\/h2>\n\n\n\n
\u3000\u30001. db\u4e0e\u500d\u6570\u7684\u6362\u7b97<\/h3>\n\n\n\n
\u3000\u30002. dbm\u4e0eW\u7684\u6362\u7b97<\/h3>\n\n\n\n