{"id":1256,"date":"2018-11-05T04:07:08","date_gmt":"2018-11-05T04:07:08","guid":{"rendered":""},"modified":"2018-11-05T12:07:47","modified_gmt":"2018-11-05T04:07:47","slug":"%e5%a6%82%e4%bd%95%e6%94%b9%e5%96%84%e4%bd%8e%e5%8e%8b%e7%94%b5%e5%8a%9b%e7%ba%bf%e4%bf%a1%e9%81%93%e4%b8%ad%e7%9a%84%e5%99%aa%e5%a3%b0","status":"publish","type":"post","link":"http:\/\/www.szryc.com\/?p=1256","title":{"rendered":"\u5982\u4f55\u6539\u5584\u4f4e\u538b\u7535\u529b\u7ebf\u4fe1\u9053\u4e2d\u7684\u566a\u58f0"},"content":{"rendered":"

\n\t\u5f15 \u8a00<\/p>\n

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\n\t <\/div>\n

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\n\t1.\u6297\u5e72\u6270\u80fd\u529b\u5f3a<\/p>\n

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\n\t2.\u5177\u6709\u5f3a\u7684\u6297\u591a\u5f84\u5e72\u6270\u80fd\u529b<\/p>\n

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\n\t3.\u5bf9\u5176\u4ed6\u7535\u53f0\u5e72\u6270\u5c0f\uff0c\u6297\u622a\u83b7\u80fd\u529b\u5f3a<\/p>\n

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\n\t4.\u53ef\u4ee5\u540c\u9891\u5de5\u4f5c<\/p>\n

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\n\t5.\u4fbf\u4e8e\u5b9e\u73b0\u591a\u5740\u901a\u4fe1<\/p>\n

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\n\tl \u4f20\u7edf\u7684\u5355\u79ef\u5206\u6ed1\u52a8\u76f8\u5173\u7b97\u6cd5<\/p>\n

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\n\t\"\u5982\u4f55\u6539\u5584\u4f4e\u538b\u7535\u529b\u7ebf\u4fe1\u9053\u4e2d\u7684\u566a\u58f0\"<\/p>\n

\n

\t2 \u57fa\u4e8e\u4f4e\u538b\u7535\u529b\u7ebf\u7684\u6539\u8fdb\u7b97\u6cd5<\/p>\n

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\n\t\u7531\u4e8e\u6ee4\u6ce2\u5668<\/u>\u7684\u901a\u5e26\u5185\u3001\u5916\u7684\u80fd\u91cf\u603b\u548c\u662f\u4e00\u5b9a\u7684\uff0c\u5728\u540c\u6b65\u7684\u60c5\u51b5\u4e0b\uff0c\u80fd\u91cf\u96c6\u4e2d\u5728\u901a\u5e26\u5185\uff0c\u901a\u5e26\u5916\u7684\u4fe1\u53f7\u80fd\u91cf\u4e3a0\uff1b\u5728\u4e0d\u540c\u6b65\u60c5\u51b5\u4e0b\uff0c\u901a\u5e26\u5916\u7684\u80fd\u91cf\u8981\u5927\u4e8e\u6216\u8005\u7b49\u4e8e\u901a\u5e26\u5185\u7684\u80fd\u91cf\u3002<\/p>\n

\n\t2.1 \u7535\u529b\u4fe1\u9053\u73af\u5883\u4e0b\u4fe1\u53f7\u7684\u4f20\u8f93\u7279\u6027<\/p>\n

\n\t\u6269\u9891\u7cfb\u7edf\u4f7f\u7528\u7684\u901a\u4fe1\u9891\u5e26\u4e3b\u8981\u5728100\uff5e450 kHz\u3002\u5728\u8fd9\u4e2a\u9891\u5e26\u4e0a\uff0c\u4f4e\u538b\u7535\u529b\u7ebf\u4e0a\u7684\u566a\u58f0\u53ef\u4ee5\u5206\u4e3a\u80cc\u666f\u566a\u58f0\u3001\u4e0e\u5de5\u9891\u540c\u6b65\u7684\u5468\u671f\u6027\u566a\u58f0\u3001\u7a81\u53d1\u6027\u566a\u58f0\u3001\u9891\u57df\u7a84\u5e26\u8109\u51b2\u566a\u58f04\u7c7b\u3002\u5176\u4e2d\uff0c\u80cc\u666f\u566a\u58f0\u5bf9\u7535\u529b\u7ebf\u6269\u9891\u901a\u4fe1\u7684\u5f71\u54cd\u6700\u5927\u3002\u5728\u6269\u9891\u9891\u5e26\u5185\u80cc\u666f\u566a\u58f0\u57fa\u672c\u4fdd\u6301\u6c34\u5e73\u72b6\u6001\uff0c\u5176\u7279\u6027\u4e3a\u5e73\u7a33\u7684\u9ad8\u65af\u767d\u566a\u58f0\uff1b\u4e0e\u5de5\u9891\u540c\u6b65\u7684\u5468\u671f\u6027\u566a\u58f0\u6301\u7eed\u65f6\u95f4\u957f\uff0c\u9891\u57df\u8986\u76d6\u8303\u56f4\u5e7f\uff0c\u529f\u7387\u5927\u3002\u4f46\u9ad8\u4f20\u8f93\u901f\u7387\u7684\u901a\u4fe1\u7cfb\u7edf\u7531\u4e8e\u6570\u636e\u5305\u6301\u7eed\u65f6\u95f4\u77ed\uff0c\u53ef\u5728\u5468\u671f\u6027\u566a\u58f0\u7684\u95f4\u9699\u8fdb\u884c\u4f20\u8f93\uff0c\u4ece\u800c\u964d\u4f4e\u4e86\u8fd9\u79cd\u566a\u58f0\u7684\u5f71\u54cd\uff1b\u7a81\u53d1\u6027\u566a\u58f0\u7684\u80fd\u91cf\u4e3b\u8981\u96c6\u4e2d\u5728100 kHz\u4ee5\u4e0b\uff0c\u4e14\u5176\u4ea7\u751f\u7684\u9891\u7387\u4e0e\u6bcf\u79d2\u51e0\u5343\u6bd4\u7279\u7684\u6570\u636e\u4f20\u8f93\u7387\u76f8\u6bd4\u5f88\u4f4e\uff0c\u56e0\u800c\u5bf9\u6269\u9891\u4f20\u8f93\u7cfb\u7edf\u7684\u5f71\u54cd\u4e0d\u662f\u5f88\u5927\uff1b\u9891\u57df\u7a84\u5e26\u8109\u51b2\u566a\u58f0\u7684\u7279\u70b9\u662f\uff1a\u4e00\u65e6\u4ea7\u751f\uff0c\u6301\u7eed\u65f6\u95f4\u957f\uff0c\u80fd\u91cf\u5927\u3002\u5982\u679c\u901a\u4fe1\u7cfb\u7edf\u91c7\u7528\u5355\u9891\u8f7d\u6ce2\uff0c\u4e14\u8f7d\u6ce2\u9891\u7387\u6070\u597d\u843d\u5728\u8fd9\u79cd\u7a84\u5e26\u566a\u58f0\u7684\u9891\u7387\u4e0a\uff0c\u90a3\u5bf9\u6b64\u7cfb\u7edf\u7684\u901a\u4fe1\u4f20\u8f93\u5f71\u54cd\u5f88\u5927\u3002<\/p>\n

\n\t\u6839\u636e\u4e0a\u8ff0\u5206\u6790\uff0c\u9488\u5bf9\u5176\u4e2d\u5f71\u54cd\u6bd4\u8f83\u5927\u7684\u4e24\u7c7b\u566a\u58f0\u8fdb\u884c\u5206\u6790\uff1a\u80cc\u666f\u566a\u58f0\u4e0e\u9891\u57df\u7a84\u5e26\u8109\u51b2\u566a\u58f0\u3002\u4e0a\u5e26\u901a\u8f93\u51fa\u7684\u4fe1\u53f7\u529f\u7387\u5305\u62ec\u6709\u7528\u4fe1\u53f7\u3001\u90e8\u5206\u80cc\u666f\u566a\u58f0\u3001\u90e8\u5206\u9891\u57df\u7a84\u5e26\u8109\u51b2\u566a\u58f0\uff1b\u4e0b\u901a\u5e26\u8f93\u51fa\u7684\u4fe1\u53f7\u529f\u7387\u5305\u62ec\u7801\u81ea\u566a\u58f0\u3001\u90e8\u5206\u80cc\u666f\u566a\u58f0\u548c\u90e8\u5206\u9891\u57df\u7a84\u5e26\u8109\u51b2\u566a\u58f0\u3002<\/p>\n

\n\t\u5047\u8bbe\u53d1\u9001\u7aef\u53d1\u9001\u7684\u4fe1\u606f\u7801\u7ecf\u6269\u9891\u548cBPSK\u8c03\u5236\u540e\u53d1\u9001\uff0c\u5219\u63a5\u6536\u673a\u63a5\u6536\u5230\u7684\u4fe1\u53f7\u53ef\u4ee5\u8868\u793a\u4e3a\uff1a<\/p>\n

\n\ts\uff08t\uff09=Ad\uff08t\uff09c\uff08t\uff09cos\uff082πf0\uff09+n\uff08t\uff09<\/p>\n

\n\t\u5f0f\u4e2d\uff1aA\u4e3a\u63a5\u6536\u4fe1\u53f7\u7684\u632f\u5e45\uff1bd\uff08t\uff09\u4e3a\u53d1\u9001\u7684\u4fe1\u606f\u7801\uff1bc\uff08t\uff09\u4e3a\u6269\u9891\u7684\u4f2a\u968f\u673a\u7801\uff1bf0\u4e3aBPSK\u8f7d\u6ce2\u9891\u7387\uff1bn\uff08t\uff09\u4e3a\u4f4e\u538b\u7535\u529b\u7ebf\u4fe1\u9053\u4e0a\u7684\u566a\u58f0\u3002<\/p>\n

\n\t2.2 \u6709\u7528\u4fe1\u53f7\u4e0e\u7801\u81ea\u566a\u58f0<\/p>\n

\n\t\u5728\u5b9e\u73b0\u76f8\u5173\u8fd0\u7b97\u65f6\uff0c\u53ea\u6709\u5f53\u63a5\u6536\u4fe1\u53f7\u4e0e\u672c\u5730\u53c2\u8003\u4fe1\u53f7\u5b8c\u5168\u5bf9\u51c6\u65f6\uff0c\u76f8\u5173\u5668\u8f93\u51fa\u6700\u5927\u3002\u5982\u679c\u5b83\u4eec\u4e4b\u95f4\u6709\u504f\u79fb\uff0c\u5373\u6709\u5b9a\u65f6\u8bef\u5dee\uff0c\u76f8\u5173\u5668\u8f93\u51fa\u51cf\u5c0f\uff0c\u51fa\u73b0\u76f8\u5173\u635f\u5931\u3002\u6240\u635f\u5931\u7684\u80fd\u91cf\u5c06\u8f6c\u53d8\u4e3a\u7531\u6709\u7528\u4fe1\u53f7\u548c\u4e0e\u672c\u5730\u7801\u8fdb\u884c\u76f8\u5173\u8fd0\u7b97\u540e\u9020\u6210\u7684\u7801\u81ea\u566a\u58f0\u3002<\/p>\n

\n\t\u8bbeT\u8868\u793a\u63a5\u6536\u5230\u7684\u4f2a\u968f\u673a\u7801\u7684\u6ce2\u5f62\u5ef6\u8fdf\uff0cT1\u662fT\u7684\u672c\u5730\u4f30\u503c\u3002\u5728\u7801\u5143\u504f\u79fb\u60c5\u51b5\u4e0b\uff1aT\u4e00T1≠0\uff0cc\uff08t\u4e00T\uff09c\uff08t\u4e00T1\uff09\u542b\u6709\u76f4\u6d41\u5206\u91cf\u548c\u4e00\u4e9b\u5e72\u6270\u566a\u58f0\u3002\u8fd9\u4e9b\u5e72\u6270\u566a\u58f0\u79f0\u4e3a\u7801\u81ea\u566a\u58f0\u3002<\/p>\n

\n\t\u5f53|T-T1|=εTc\uff0c\u8bbeO≤|ε|≤1\u4e3a\u672c\u5730PN\u7801\u4e0e\u63a5\u6536PN\u7801\u7684\u76f8\u5bf9\u65f6\u5ef6\u3002<\/p>\n

\n\t\u8ba1\u7b97\u5f97\u5230C\uff08t\uff0cε\uff09=c\uff08t-T\uff09c\uff08t-T1\uff09\u7684\u529f\u7387\u8c31\u5bc6\u5ea6\u51fd\u6570\u4e3a\uff1a<\/p>\n

\n\t\"\u5982\u4f55\u6539\u5584\u4f4e\u538b\u7535\u529b\u7ebf\u4fe1\u9053\u4e2d\u7684\u566a\u58f0\"<\/p>\n

\n\t
\n\t    \u8bbe\u4e0a\u901a\u5e26\u7684\u9891\u5e26\u4e3a\uff1af0-fb≤f≤f0+fb\u3002\u5176\u4e2d\uff1af0\u4e3a\u8f7d\u6ce2\u9891\u7387\uff1bfb\u4e3a\u57fa\u5e26\u4fe1\u606f\u7801\u7387\uff1bfc\u4e3a\u4f2a\u968f\u673a\u7684\u7801\u7247\u901f\u7387\uff1b\u4e14fb=1\uff0fNTc\uff0c\u5219\u7531\u5f0f(1)\u53ef\u5f97\u4e0a\u901a\u5e26\u7684\u8f93\u51fa\u6709\u7528\u4fe1\u53f7\u529f\u7387\u4e3a\uff1a<\/p>\n

\n\t\"\u5982\u4f55\u6539\u5584\u4f4e\u538b\u7535\u529b\u7ebf\u4fe1\u9053\u4e2d\u7684\u566a\u58f0\"<\/p>\n

\n\t    \u8bbe\u4e0b\u901a\u5e26\u7684\u9891\u5e26\u4e3a\uff1af0-3fb≤f≤f0-fb\uff0c\u540c\u7406\u7531\u5f0f(1)\u5f97\u5230\u4e0b\u901a\u5e26\u8f93\u51fa\u7684\u7801\u81ea\u566a\u58f0\u529f\u7387\u4e3a\uff1a<\/p>\n

\n\t\"\u5982\u4f55\u6539\u5584\u4f4e\u538b\u7535\u529b\u7ebf\u4fe1\u9053\u4e2d\u7684\u566a\u58f0\"<\/p>\n

\n\t
\n\t    \u6839\u636e\u7406\u8bba\u8ba1\u7b97\uff0c\u6240\u5f97\u7ed3\u8bba\u5982\u88681\u6240\u793a\u3002\u88681\u5217\u51fa\u4e86\u5728\u4e0d\u540c|ε|\uff0c\u4e0a\u4e0b\u901a\u5e26\u8f93\u51fa\u7684\u529f\u7387\u503c\u53ca\u5176\u5dee\u503c\u3002\u7531\u8868l\u53ef\u4ee5\u770b\u51fa\uff0c\u5728\u6269\u9891\u7cfb\u7edf\u540c\u6b65\u524d\u540e\uff0c\u4e0a\u4e0b\u901a\u5e26\u8f93\u51fa\u7684\u529f\u7387\u503c\u4e4b\u5dee\u6bd4\u4e0a\u901a\u5e26\u8f93\u51fa\u529f\u7387\u7684\u53d8\u5316\u68af\u5ea6\u5927\u3002<\/p>\n

\n\t\"\u5982\u4f55\u6539\u5584\u4f4e\u538b\u7535\u529b\u7ebf\u4fe1\u9053\u4e2d\u7684\u566a\u58f0\"<\/p>\n

\n\t2\uff0e3 \u80cc\u666f\u566a\u58f0<\/p>\n

\t    \u4e00\u822c\u6765\u8bf4\uff0c\u5728\u6269\u9891\u901a\u4fe1\u9891\u5e26\u5185\uff0c\u4f4e\u538b\u7535\u529b\u7ebf\u4fe1\u9053\u4e0a\u7684\u80cc\u666f\u566a\u58f0\u53ef\u5f52\u4e3a\u9ad8\u65af\u767d\u566a\u58f0\u3002\u5047\u8bbe\u8be5\u566a\u58f0\u4e0e\u8fdb\u5165\u63a5\u6536\u673a\u7684\u5176\u4ed6\u4fe1\u53f7\u76f8\u4e92\u72ec\u7acb\uff0c\u5219\u5176\u901a\u8fc7\u63a5\u6536\u673a\u8f93\u5165\u6ee4\u6ce2\u5668\u540e\u7684\u529f\u7387\u8c31\u5bc6\u5ea6\u4e3a\uff1a<\/p>\n

\n\t\"\u5982\u4f55\u6539\u5584\u4f4e\u538b\u7535\u529b\u7ebf\u4fe1\u9053\u4e2d\u7684\u566a\u58f0\"<\/p>\n

\n\t
\n\t    \u7531\u5df2\u77e5\u7406\u8bba\u63a8\u5f97\u566a\u58f0\u5728\u6269\u9891\u76f8\u5173\u63a5\u6536\u673a\u8f93\u51fa\u7684\u5e73\u5747\u529f\u7387\u4e3a\uff1a<\/p>\n

\n\t\"\u5982\u4f55\u6539\u5584\u4f4e\u538b\u7535\u529b\u7ebf\u4fe1\u9053\u4e2d\u7684\u566a\u58f0\"<\/p>\n

\n\t
\n\t    \u5f0f\u4e2d\uff1aSn(F)\u4e3a\u80cc\u666f\u566a\u58f0\u7684\u529f\u7387\u8c31\u5bc6\u5ea6\uff1b|H(f)|2\u4e3a\u7a84\u5e26\u5e26\u901a\u6ee4\u6ce2\u5668\u7684\u9891\u7387\u4f20\u8f93\u51fd\u6570\uff1bSc(f)\u4e3am\u5e8f\u5217\u7684\u529f\u7387\u8c31\u5bc6\u5ea6\u3002<\/p>\n

\t\u5728\u4e0a\u901a\u5e26(f0-fb≤f≤f0+fb)\u4e2d\uff0cSc(f)\u53ef\u770b\u4f5c\u5e73\u5766\u7684\uff0c\u5373\u53ef\u5f97\uff1a<\/p>\n

\n\t\"\u5982\u4f55\u6539\u5584\u4f4e\u538b\u7535\u529b\u7ebf\u4fe1\u9053\u4e2d\u7684\u566a\u58f0\"<\/p>\n

\n\t
\n\t    \u5047\u8bbe\u8be5\u7a84\u5e26\u5e26\u901a\u6ee4\u6ce2\u5668\u7684\u529f\u7387\u4f20\u8f93\u51fd\u6570\u662f\u7406\u60f3\u7684\uff0c\u5e76\u5bf9\u5176\u5e45\u9891\u7279\u6027\u8fdb\u884c\u4e86\u5f52\u4e00\u5316\uff0c\u5373\uff1a<\/p>\n

\n\t\"\u5982\u4f55\u6539\u5584\u4f4e\u538b\u7535\u529b\u7ebf\u4fe1\u9053\u4e2d\u7684\u566a\u58f0\"<\/p>\n

\n\t
\n\t    \u7531\u5f0f(3)\u53ef\u5f97\u5219\u5f0f(3)\u5316\u4e3afbTcsi<\/u>nc2(FTc)\uff0c\u6574\u7406\u53ef\u5f97\u8be5\u80cc\u666f\u566a\u58f0\u5728\u4e0a\u901a\u5e26\u7684\u8f93\u51fa\u529f\u7387\u503c\u4e3a\uff1a<\/p>\n

\n\t\"\u5982\u4f55\u6539\u5584\u4f4e\u538b\u7535\u529b\u7ebf\u4fe1\u9053\u4e2d\u7684\u566a\u58f0\"<\/p>\n

\n\t    \u4e0b\u901a\u5e26\u7684\u529f\u7387\u4f20\u8f93\u51fd\u6570\u4e3a\uff1a<\/p>\n

\n\t\"\u5982\u4f55\u6539\u5584\u4f4e\u538b\u7535\u529b\u7ebf\u4fe1\u9053\u4e2d\u7684\u566a\u58f0\"<\/p>\n

\n\t\u540c\u7406\u53ef\u5f97\u5230\u4e14\u80cc\u666f\u566a\u58f0\u5728\u4e0b\u901a\u5e26\u7684\u8f93\u51fa\u529f\u7387\u4e3a\uff1a<\/p>\n

\n\t\u7531\u6b64\u53ef\u5f97\uff0c\u4f4e\u538b\u7535\u529b\u7ebf\u4e0a\u7684\u80cc\u666f\u566a\u58f0\u5728\u4e0a\u901a\u5e26\u4e0e\u4e0b\u901a\u5e26\u7684\u8f93\u51fa\u529f\u7387\u503c\u76f8\u540c\uff0c\u5373\u8be5\u80cc\u666f\u566a\u58f0\u5728\u4e0a\u901a\u5e26\u4e0e\u4e0b\u901a\u5e26\u7684\u8f93\u51fa\u503c\u53ef\u4ee5\u76f8\u4e92\u62b5\u6d88\u3002<\/p>\n

\n\t2\uff0e4 \u9891\u57df\u7a84\u5e26\u8109\u51b2\u566a\u58f0<\/p>\n

\n\t\u5f71\u54cd\u6269\u9891\u63a5\u6536\u673a\u6027\u80fd\u7684\u53e6\u4e00\u4e2a\u4f4e\u538b\u7535\u529b\u7ebf\u4fe1\u9053\u566a\u58f0\u4e3a\uff1a\u9891\u57df\u7a84\u5e26\u566a\u58f0\uff0c\u5b83\u53ef\u901a\u8fc7\u5982\u4e0bN\u4e2a\u72ec\u7acb\u7684\u4f59\u5f26\u51fd\u6570\u53e0\u52a0\u6765\u63cf\u8ff0\uff1a<\/p>\n

\n\t\u5f0f\u4e2d\uff1a\u6bcf\u4e2a\u5206\u91cf\u7531\u5b83\u7684\u9891\u7387\u3001\u5e45\u503c\u548c\u76f8\u4f4d\u6765\u63cf\u8ff0\u3002\u5176\u4e2d\uff0c\u9891\u7387\u5728\u6269\u9891\u8f7d\u6ce2\u9644\u8fd1\u7684\u4f59\u5f26\u5206\u91cf\u5bf9\u8be5\u7cfb\u7edf\u5f71\u54cd\u6700\u5927\u3002\u5728\u6b64\uff0c\u53d6\u9891\u7387\u4e3a\u6269\u9891\u8f7d\u6ce2\u7684\u4f59\u5f26\u5206\u91cf\u6765\u5206\u6790\uff0c\u5047\u8bbe\u8be5\u9891\u57df\u7a84\u5e26\u8109\u51b2\u566a\u58f0\u4e3a\u5355\u9891\u4f59\u5f26\u5e72\u6270\uff0c\u8be5\u4fe1\u53f7\u4e0e\u8fdb\u5165\u63a5\u6536\u673a\u7684\u6709\u7528\u4fe1\u53f7\u662f\u76f8\u4e92\u72ec\u7acb\u7684\uff0c\u4e14\u4e0e\u6709\u7528\u4fe1\u53f7\u7684\u8f7d\u6ce2\u540c\u9891\u3001\u540c\u76f8(\u6700\u6076\u52a3\u7684\u5e72\u6270\u6761\u4ef6\u4e0b)\uff0c\u8868\u793a\u4e3a\uff1a<\/p>\n

\n\t\u4e14\u5176\u5bf9\u5e94\u7684\u529f\u7387\u8c31\u5bc6\u5ea6\u4e3a\uff1a<\/p>\n

\n\t\u7531\u5f0f(2)\u53ef\u5f97\uff0c\u5355\u9891\u5e72\u6270A(t)\u5728\u63a5\u6536\u673a\u8f93\u51fa\u7684\u5e73\u5747\u529f\u7387\u4e3a\uff1a<\/p>\n

\n\t\u8be5\u5355\u9891\u566a\u58f0\u5728\u4e0a\u901a\u5e26\u7684\u8f93\u51fa\u529f\u7387\u4e3a\uff1a<\/p>\n

\n\t\u540c\u7406\u53ef\u5f97\uff0c\u8be5\u5355\u9891\u566a\u58f0\u5728\u4e0b\u901a\u5e26\u7684\u8f93\u51fa\u529f\u7387\u4e0e\u5176\u5728\u4e0a\u901a\u5e26\u7684\u8f93\u51fa\u529f\u7387\u503c\u76f8\u540c\u3002<\/p>\n

\n\t\u7531\u6b64\u53ef\u5f97\uff0c\u8be5\u9891\u57df\u7a84\u5e26\u8109\u51b2\u566a\u58f0\u5728\u4e0a\u4e0b\u901a\u5e26\u7684\u8f93\u51fa\u503c\u76f8\u51cf\u540e\u4ea6\u53ef\u76f8\u4e92\u62b5\u6d88\u3002<\/p>\n

\n\t\u5728\u8ba8\u8bba\u4e0a\u3001\u4e0b\u901a\u5e26\u8f93\u51fa\u7684\u5404\u7c7b\u4fe1\u53f7\u529f\u7387\u540e\uff0c\u5f97\u51fa\u5982\u4e0b\u7ed3\u8bba\uff1a\u4f4e\u538b\u7535\u529b\u7ebf\u7684\u4fe1\u9053\u566a\u58f0\u5728\u4e0a\u3001\u4e0b\u901a\u5e26\u7684\u8f93\u51fa\u529f\u7387\u503c\u76f8\u540c\u3002\u6b64\u65f6\uff0c\u4e0a\u3001\u4e0b\u901a\u5e26\u7684\u8f93\u51fa\u4fe1\u53f7\u529f\u7387\u4e4b\u5dee\u4e3b\u8981\u662f\u6709\u7528\u4fe1\u53f7\u4e0e\u7801\u81ea\u566a\u58f0\u4e4b\u5dee\u3002\u7b2c2\uff0e2\u8282\u5df2\u7ecf\u8ba8\u8bba\u4e86\u6709\u7528\u4fe1\u53f7\u4e0e\u7801\u81ea\u566a\u58f0\u4e4b\u5dee\u6bd4\u4f20\u7edf\u4e0a\u901a\u5e26\u8f93\u51fa\u529f\u7387\u7684\u68af\u5ea6\u53d8\u5316\u5927\uff0c\u5373\u6539\u8fdb\u7684\u6ed1\u52a8\u76f8\u5173\u6cd5\u6269\u5927\u4e86\u540c\u6b65\u4e0e\u4e0d\u540c\u6b65\u60c5\u51b5\u4e0b\u79ef\u5206\u8f93\u51fa\u7684\u5dee\u8ddd\uff0c\u4f7f\u7cfb\u7edf\u66f4\u6613\u4e8e\u5224\u65ad\u662f\u5426\u540c\u6b65\u3002\u6240\u4ee5\u8be5\u7b97\u6cd5\u5728\u4f4e\u538b\u7535\u529b\u7ebf\u4fe1\u9053\u566a\u58f0\u73af\u5883\u4e0b\u662f\u53ef\u884c\u7684\u3002<\/p>\n

\n\t3 \u4eff\u771f\u5b9e\u9a8c\u4e0e\u7ed3\u679c\u5206\u6790<\/p>\n

\n\t\u5728\u6b64\u91c7\u7528Matlab<\/u> R2006b\u5de5\u5177\uff0c\u5728\u4f4e\u538b\u7535\u529b\u7ebf\u4fe1\u9053\u566a\u58f0\u73af\u5883\u4e0b(\u80cc\u666f\u566a\u58f0\u3001\u9891\u7387\u5728\u4e2d\u9891\u9644\u8fd1\u7684\u7a84\u5e26\u8109\u51b2\u566a\u58f0)\uff0c\u5bf9\u6269\u9891\u7cfb\u7edf\u8fdb\u884c\u6574\u4f53\u4eff\u771f\u3002\u5176\u4e2d\uff0c\u4f2a\u968f\u673a\u5e8f\u5217\u7801\u957f\u4e3a15\u4f4d\uff0c\u91c7\u7528BPSK\u8c03\u5236\uff0c\u4e14\u4e2d\u9891\u9891\u7387\u4e3a100 kHz\u3002\u901a\u8fc7\u5927\u91cf\u7684\u6570\u636e\u8bb0\u5f55\u548c\u5206\u6790\uff0c\u53ef\u5f97\u5230\u4ee5\u4e0b\u7edf\u8ba1\u7ed3\u679c\u3002<\/p>\n

\n\t\u56fe2\u4e3a\u4ec5\u52a0\u5165\u9ad8\u65af\u767d\u566a\u58f0\u65f6\uff0c\u4e0d\u540c\u4fe1\u566a\u6bd4\u4e0b\uff0c\u6539\u8fdb\u7684\u6355\u83b7\u65b9\u6cd5\u4e0e\u4f20\u7edf\u7684\u6ed1\u52a8\u76f8\u5173\u6355\u83b7\u7b97\u6cd5\uff0c\u5728\u4e00\u5b9a\u65f6\u95f4\u5185\u5b8c\u6210\u6355\u83b7\u5e76\u65e0\u865a\u8b66\u7684\u6982\u7387\u3002<\/p>\n

\n\t\"\u5982\u4f55\u6539\u5584\u4f4e\u538b\u7535\u529b\u7ebf\u4fe1\u9053\u4e2d\u7684\u566a\u58f0\"<\/p>\n

\n\t\u56fe3\u8868\u793a\u5728\u4f4e\u538b\u7535\u529b\u7ebf\u4fe1\u9053\u566a\u58f0\u73af\u5883\u4e0b\uff0c\u6539\u8fdb\u7684\u6355\u83b7\u65b9\u6cd5\u5728\u4e00\u5b9a\u65f6\u95f4\u5185\u5b8c\u6210\u6355\u83b7\u5e76\u65e0\u865a\u8b66\u7684\u6982\u7387\u3002<\/p>\n

\n\t\"\u5982\u4f55\u6539\u5584\u4f4e\u538b\u7535\u529b\u7ebf\u4fe1\u9053\u4e2d\u7684\u566a\u58f0\"<\/p>\n

\n\t\u7531\u56fe2\u53ef\u4ee5\u770b\u51fa\uff0c\u5f53\u4fe1\u566a\u6bd4\u8f83\u9ad8\u7684\u65f6\u5019\uff0c\u6539\u8fdb\u65b9\u6cd5\u4e0e\u4f20\u7edf\u65b9\u6cd5\u76f8\u6bd4\uff0c\u5176\u4f18\u70b9\u5e76\u4e0d\u7a81\u51fa\uff0c\u5f53\u4fe1\u566a\u6bd4\u4f4e\u4e8e\u4e0018 dB\u540e\uff0c\u6539\u8fdb\u6355\u83b7\u65b9\u6cd5\u6bd4\u4f20\u7edf\u65b9\u6cd5\u7684\u6355\u83b7\u6982\u7387\u9ad8\u3002\u53ef\u89c1\uff0c\u5728\u4fe1\u566a\u6bd4\u8f83\u4f4e\u7684\u60c5\u51b5\u4e0b\uff0c\u6539\u8fdb\u7684\u65b9\u6cd5\u6bd4\u4f20\u7edf\u7684\u65b9\u6cd5\u6709\u66f4\u9ad8\u7684\u6355\u83b7\u6982\u7387\uff0c\u80fd\u591f\u6709\u6548\u5730\u63d0\u9ad8\u7cfb\u7edf\u7684\u68c0\u6d4b\u6982\u7387\u548c\u6355\u83b7\u6027\u80fd\u3002<\/p>\n

\n\t\u7531\u56fe3\u53ef\u4ee5\u770b\u51fa\uff0c\u6539\u8fdb\u7684\u6355\u83b7\u7b97\u6cd5\u52a0\u5165\u4f4e\u538b\u7535\u529b\u7ebf\u4fe1\u9053\u566a\u58f0\u540e\uff0c\u5176\u540c\u6b65\u6355\u83b7\u6982\u7387\u76f8\u5bf9\u4e8e\u56fe3\u7684\u6539\u8fdb\u7b97\u6cd5\uff0c\u5e76\u65e0\u660e\u663e\u53d8\u5316\u3002\u7531\u6b64\u53ef\u89c1\uff0c\u8be5\u6539\u8fdb\u7684\u6355\u83b7\u7b97\u6cd5\u9002\u7528\u4e8e\u4f4e\u538b\u7535\u529b\u7ebf\u4e0a\u3002<\/p>\n

\n\t4 \u7ed3 \u8bed<\/p>\n

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