{"id":38642,"date":"2023-09-25T20:59:09","date_gmt":"2023-09-25T12:59:09","guid":{"rendered":"https:\/\/www.techphant.cn\/?p=38642"},"modified":"2023-09-25T20:59:13","modified_gmt":"2023-09-25T12:59:13","slug":"atzscxhdcsdkzms","status":"publish","type":"post","link":"https:\/\/www.techphant.cn\/blog\/38642.html","title":{"rendered":"ASK\u8c03\u5236\u8f93\u51fa\u4fe1\u53f7\u7684\u4f20\u8f93\u5e26\u5bbd\u600e\u4e48\u7b97\uff1f"},"content":{"rendered":"\n
\u3000\u3000\u5728\u901a\u4fe1\u9886\u57df\u4e2d\uff0c\u8c03\u5236\u662f\u4e00\u79cd\u5c06\u4fe1\u606f\u4fe1\u53f7\u8f6c\u6362\u4e3a\u9002\u5408\u4f20\u8f93\u7684\u8f7d\u6ce2\u4fe1\u53f7\u7684\u8fc7\u7a0b\u3002ASK\u8c03\u5236(Amplitude Shift Keying)\u662f\u4e00\u79cd\u5e38\u89c1\u7684\u6570\u5b57\u8c03\u5236\u6280\u672f\uff0c\u5b83\u901a\u8fc7\u6539\u53d8\u8f7d\u6ce2\u4fe1\u53f7\u7684\u5e45\u5ea6\u6765\u4f20\u8f93\u6570\u5b57\u4fe1\u606f\u3002<\/strong>\u5728\u8bbe\u8ba1\u548c\u5206\u6790ASK\u8c03\u5236\u7cfb\u7edf\u65f6\uff0c\u4e86\u89e3\u5982\u4f55\u8ba1\u7b97\u8f93\u51fa\u4fe1\u53f7\u7684\u4f20\u8f93\u5e26\u5bbd\u662f\u81f3\u5173\u91cd\u8981\u7684\u3002\u672c\u6587\u5c06\u4ecb\u7ecd\u8ba1\u7b97ASK\u8c03\u5236\u8f93\u51fa\u4fe1\u53f7\u4f20\u8f93\u5e26\u5bbd\u7684\u65b9\u6cd5\u548c\u6b65\u9aa4\u3002<\/p>\n\n\n\n \u3000\u3000ASK\u8c03\u5236\u662f\u4e00\u79cd\u5c06\u6570\u5b57\u4fe1\u606f\u8f6c\u6362\u4e3a\u6a21\u62df\u4fe1\u53f7\u7684\u8c03\u5236\u6280\u672f\u3002\u5b83\u901a\u8fc7\u6539\u53d8\u8f7d\u6ce2\u4fe1\u53f7\u7684\u5e45\u5ea6\u6765\u8868\u793a\u6570\u5b57\u4fe1\u606f\uff0c\u901a\u5e38\u4f7f\u7528\u4e24\u4e2a\u4e0d\u540c\u7684\u5e45\u5ea6\u8868\u793a0\u548c1.\u5f53\u6570\u5b57\u4fe1\u606f\u4e3a0\u65f6\uff0c\u8f7d\u6ce2\u4fe1\u53f7\u7684\u5e45\u5ea6\u4e3a\u4f4e\u5e45\u5ea6;\u5f53\u6570\u5b57\u4fe1\u606f\u4e3a1\u65f6\uff0c\u8f7d\u6ce2\u4fe1\u53f7\u7684\u5e45\u5ea6\u4e3a\u9ad8\u5e45\u5ea6\u3002ASK\u8c03\u5236\u7684\u4f18\u70b9\u662f\u7b80\u5355\u76f4\u89c2\uff0c\u4f46\u76f8\u5bf9\u4e8e\u5176\u4ed6\u8c03\u5236\u6280\u672f\uff0c\u5b83\u7684\u4f20\u8f93\u6548\u7387\u8f83\u4f4e\u3002<\/p>\n\n\n\n \u3000\u3000\u8981\u8ba1\u7b97ASK\u8c03\u5236\u8f93\u51fa\u4fe1\u53f7\u7684\u4f20\u8f93\u5e26\u5bbd\uff0c\u9700\u8981\u8003\u8651\u4ee5\u4e0b\u51e0\u4e2a\u56e0\u7d20\uff1a<\/p>\n\n\n\n \u3000\u3000\u8c03\u5236\u4fe1\u53f7\u7684\u5e26\u5bbd\u53d6\u51b3\u4e8e\u6570\u5b57\u4fe1\u606f\u7684\u4f20\u8f93\u901f\u7387\u3002<\/strong>\u4f20\u8f93\u901f\u7387\u662f\u6307\u6bcf\u79d2\u4f20\u8f93\u7684\u6bd4\u7279\u6570\u3002\u901a\u5e38\uff0c\u8c03\u5236\u4fe1\u53f7\u7684\u5e26\u5bbd\u7b49\u4e8e\u4f20\u8f93\u901f\u7387\u7684\u4e00\u534a\u3002\u5047\u8bbe\u4f20\u8f93\u901f\u7387\u4e3aR(\u6bd4\u7279\/\u79d2)\uff0c\u90a3\u4e48\u8c03\u5236\u4fe1\u53f7\u7684\u5e26\u5bbd\u4e3aB=R\/2.<\/p>\n\n\n\n \u3000\u3000ASK\u8c03\u5236\u4f7f\u7528\u7684\u8f7d\u6ce2\u4fe1\u53f7\u901a\u5e38\u662f\u6b63\u5f26\u6ce2\uff0c\u5176\u9891\u7387\u7531\u5177\u4f53\u5e94\u7528\u51b3\u5b9a\u3002\u8f7d\u6ce2\u9891\u7387\u901a\u5e38\u4ee5\u8d6b\u5179(Hz)\u4e3a\u5355\u4f4d\u3002<\/p>\n\n\n\n \u3000\u3000\u8c03\u5236\u6307\u6570\u662fASK\u8c03\u5236\u4e2d\u7528\u4e8e\u8868\u793a\u6570\u5b57\u4fe1\u606f\u7684\u5e45\u5ea6\u53d8\u5316\u91cf\u3002\u8c03\u5236\u6307\u6570\u7684\u53d6\u503c\u8303\u56f4\u4e3a0\u52301.\u8c03\u5236\u6307\u6570\u4e3a0\u65f6\uff0c\u8868\u793a\u5e45\u5ea6\u6ca1\u6709\u53d8\u5316\uff0c\u5373\u5e38\u6570\u5e45\u5ea6\u8c03\u5236;\u8c03\u5236\u6307\u6570\u4e3a1\u65f6\uff0c\u8868\u793a\u5e45\u5ea6\u53d8\u5316\u6700\u5927\uff0c\u5373\u5e45\u5ea6\u8c03\u5236\u3002<\/p>\n\n\n\n \u3000\u3000\u6839\u636e\u8c03\u5236\u4fe1\u53f7\u7684\u5e26\u5bbd\u3001\u8f7d\u6ce2\u9891\u7387\u548c\u8c03\u5236\u6307\u6570\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u516c\u5f0f\u8ba1\u7b97ASK\u8c03\u5236\u8f93\u51fa\u4fe1\u53f7\u7684\u4f20\u8f93\u5e26\u5bbd\uff1a<\/p>\n\n\n\n \u3000\u3000\u4f20\u8f93\u5e26\u5bbd = (1 + \u8c03\u5236\u6307\u6570) \u00d7 \u8c03\u5236\u4fe1\u53f7\u7684\u5e26\u5bbd + \u8f7d\u6ce2\u9891\u7387<\/strong><\/p>\n\n\n\n \u3000\u3000\u5047\u8bbe\u4e00\u4e2aASK\u8c03\u5236\u7cfb\u7edf\u7684\u4f20\u8f93\u901f\u7387\u4e3a10 Mbps\uff0c\u8f7d\u6ce2\u9891\u7387\u4e3a1 MHz\uff0c\u8c03\u5236\u6307\u6570\u4e3a0.5.\u6839\u636e\u4e0a\u8ff0\u516c\u5f0f\uff0c\u53ef\u4ee5\u8ba1\u7b97\u51fa\u4f20\u8f93\u5e26\u5bbd\u5982\u4e0b\uff1a<\/p>\n\n\n\n \u3000\u3000\u4f20\u8f93\u5e26\u5bbd = (1 + 0.5) \u00d7 (10 Mbps \/ 2) + 1 MHz = 6 MHz<\/p>\n\n\n\n \u3000\u3000\u56e0\u6b64\uff0c\u8be5ASK\u8c03\u5236\u7cfb\u7edf\u7684\u4f20\u8f93\u5e26\u5bbd\u4e3a6 MHz\u3002<\/p>\n\n\n\n \u3000\u3000\u8ba1\u7b97ASK\u8c03\u5236\u8f93\u51fa\u4fe1\u53f7\u7684\u4f20\u8f93\u5e26\u5bbd\u662f\u8bbe\u8ba1\u548c\u5206\u6790ASK\u8c03\u5236\u7cfb\u7edf\u7684\u91cd\u8981\u6b65\u9aa4\u3002\u901a\u8fc7\u8003\u8651\u8c03\u5236\u4fe1\u53f7\u7684\u5e26\u5bbd\u3001\u8f7d\u6ce2\u9891\u7387\u548c\u8c03\u5236\u6307\u6570\uff0c\u53ef\u4ee5\u4f7f\u7528\u76f8\u5e94\u7684\u8ba1\u7b97\u516c\u5f0f\u6765\u786e\u5b9a\u4f20\u8f93\u5e26\u5bbd\u3002\u4e86\u89e3\u4f20\u8f93\u5e26\u5bbd\u6709\u52a9\u4e8e\u4f18\u5316ASK\u8c03\u5236\u7cfb\u7edf\u7684\u6027\u80fd\uff0c\u5e76\u786e\u4fdd\u4fe1\u53f7\u5728\u4f20\u8f93\u8fc7\u7a0b\u4e2d\u4e0d\u4f1a\u5931\u771f\u3002\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u8fd8\u9700\u8981\u8003\u8651\u5176\u4ed6\u56e0\u7d20\uff0c\u5982\u566a\u58f0\u548c\u4fe1\u9053\u7279\u6027\uff0c\u4ee5\u8fdb\u4e00\u6b65\u4f18\u5316ASK\u8c03\u5236\u7cfb\u7edf\u7684\u6027\u80fd\u3002<\/p>\n\n\n\n \u3000\u3000\u672c\u6587\u4ecb\u7ecd\u4e86\u5982\u4f55\u8ba1\u7b97ASK\u8c03\u5236\u8f93\u51fa\u4fe1\u53f7\u7684\u4f20\u8f93\u5e26\u5bbd\u3002\u901a\u8fc7\u8003\u8651\u8c03\u5236\u4fe1\u53f7\u7684\u5e26\u5bbd\u3001\u8f7d\u6ce2\u9891\u7387\u548c\u8c03\u5236\u6307\u6570\uff0c\u53ef\u4ee5\u4f7f\u7528\u76f8\u5e94\u7684\u8ba1\u7b97\u516c\u5f0f\u6765\u786e\u5b9a\u4f20\u8f93\u5e26\u5bbd\u3002<\/strong>\u4e86\u89e3\u4f20\u8f93\u5e26\u5bbd\u6709\u52a9\u4e8e\u4f18\u5316ASK\u8c03\u5236\u7cfb\u7edf\u7684\u6027\u80fd\uff0c\u5e76\u786e\u4fdd\u4fe1\u53f7\u5728\u4f20\u8f93\u8fc7\u7a0b\u4e2d\u4e0d\u4f1a\u5931\u771f\u3002\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u8fd8\u9700\u8981\u7efc\u5408\u8003\u8651\u5176\u4ed6\u56e0\u7d20\uff0c\u4ee5\u8fdb\u4e00\u6b65\u4f18\u5316ASK\u8c03\u5236\u7cfb\u7edf\u7684\u6027\u80fd\u3002<\/p>\n","protected":false},"excerpt":{"rendered":" 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\u4ec0\u4e48\u662fASK\u8c03\u5236<\/h2>\n\n\n\n
\u3000\u3000\u4e8c\u3001 \u8ba1\u7b97ASK\u8c03\u5236\u8f93\u51fa\u4fe1\u53f7\u4f20\u8f93\u5e26\u5bbd\u7684\u65b9\u6cd5<\/h2>\n\n\n\n
\u3000\u30001. \u8c03\u5236\u4fe1\u53f7\u7684\u5e26\u5bbd<\/h3>\n\n\n\n
\u3000\u30002. \u8f7d\u6ce2\u9891\u7387<\/h3>\n\n\n\n
\u3000\u30003. \u8c03\u5236\u6307\u6570<\/h3>\n\n\n\n
\u3000\u30004. \u5e26\u5bbd\u8ba1\u7b97\u516c\u5f0f<\/h3>\n\n\n\n
\u3000\u3000\u4e09\u3001 \u793a\u4f8b\u8ba1\u7b97<\/h2>\n\n\n\n
\u3000\u3000\u56db\u3001 \u7ed3\u8bba<\/h2>\n\n\n\n