{"id":1782,"date":"2018-12-17T02:42:51","date_gmt":"2018-12-17T02:42:51","guid":{"rendered":""},"modified":"2018-12-17T10:43:26","modified_gmt":"2018-12-17T02:43:26","slug":"%e4%bf%a1%e5%8f%b7%e6%ba%90%e6%89%80%e6%b6%89%e5%8f%8a%e7%9a%84%e7%9b%b8%e5%85%b3%e5%9f%ba%e7%a1%80%e7%9f%a5%e8%af%86%e4%bb%8b%e7%bb%8d","status":"publish","type":"post","link":"http:\/\/www.szryc.com\/?p=1782","title":{"rendered":"\u4fe1\u53f7\u6e90\u6240\u6d89\u53ca\u7684\u76f8\u5173\u57fa\u7840\u77e5\u8bc6\u4ecb\u7ecd"},"content":{"rendered":"

\n\t\u4e00\u3001\u6b63\u5f26\u6ce2\u7684\u4fe1\u53f7\u7279\u6027<\/span><\/p>\n

\n\t\u901a\u8fc7\u6b63\u5f26\u6ce2\u4fe1\u53f7\u7684\u8868\u8fbe\u7b49\u5f0f\uff0c\u53ef\u4ee5\u53cd\u6620\u5176\u4fe1\u53f7\u6240\u5305\u542b\u7684\u53c2\u6570\u4e3a\uff1a\u4fe1\u53f7\u5e45\u5ea6\uff1b\u9891\u7387\uff1b\u521d\u59cb\u76f8\u4f4d\u3002\u4fe1\u53f7\u7684\u9891\u7387\u548c\u521d\u59cb\u76f8\u4f4d\u53ef\u4ee5\u5305\u542b\u5728\u4fe1\u53f7\u7684\u76f8\u4f4d\u4fe1\u606f\u4e2d\u3002<\/p>\n

\n\t <\/div>\n

\n\t\u5bf9\u4e8e\u7406\u60f3\u7684\u6b63\u5f26\u6ce2\u4fe1\u53f7\u800c\u8a00\uff0c\u5176\u5e45\u5ea6\u548c\u9891\u7387\u53ca\u521d\u59cb\u76f8\u4f4d\u5e94\u8be5\u4e3a\u786e\u5b9a\u53c2\u6570\uff0c\u6240\u4ee5\u6b63\u5f26\u6ce2\u4fe1\u53f7\u662f\u6bd4\u8f83\u7b80\u5355\u7684\u4fe1\u53f7\u3002\u5b9a\u4e49\u4e00\u4e2a\u8fde\u7eed\u6ce2\u4fe1\u53f7\u53ea\u9700\u8981\u5e45\u5ea6\u548c\u9891\u7387\u4e24\u65b9\u9762\u6307\u6807\u3002<\/p>\n

\n\t<\/p>\n

\n\t\u56fe1 \u6b63\u5f26\u6ce2\u4fe1\u53f7\u7279\u6027<\/p>\n

\n\t\u4fe1\u53f7\u6e90\u4ea7\u751f\u6b63\u5f26\u6ce2\u7684\u5178\u578b\u5e45\u5ea6\u53c2\u6570\u6709\u5982\u4e0b\u51e0\u9879\uff1a<\/p>\n

\n\t<\/p>\n

\n\t\u56fe2 \u4fe1\u53f7\u6e90\u8f93\u51fa\u6b63\u5f26\u6ce2\u7684\u5178\u578b\u5e45\u5ea6\u53c2\u6570<\/p>\n

\n\t\u4fe1\u53f7\u6e90\u8981\u8003\u8651\u5e45\u5ea6\u7cbe\u5ea6\uff0c\u4ee5\u63d0\u9ad8\u6d4b\u8bd5\u7684\u53ef\u91cd\u590d\u6027\uff0c\u964d\u4f4e\u6d4b\u8bd5\u4e0d\u786e\u5b9a\u5ea6\u3002<\/p>\n

\n\t\u4fe1\u53f7\u6e90\u7684\u5178\u578b\u9891\u7387\u53c2\u6570\u6709\u5982\u4e0b\u51e0\u9879\uff1a<\/p>\n

\n\t<\/p>\n

\n\t\u56fe3 \u4fe1\u53f7\u6e90\u8f93\u51fa\u6b63\u5f26\u6ce2\u7684\u5178\u578b\u9891\u7387\u53c2\u6570<\/p>\n

\n\t\u4fe1\u53f7\u6e90\u7684\u9891\u7387\u7cbe\u5ea6\u4e0e\u53c2\u8003\u632f\u8361\u5668<\/u>\u7684\u5e74\u8001\u5316\u7387\u53ca\u6821\u51c6\u4e4b\u540e\u7ecf\u5386\u7684\u65f6\u95f4\u6709\u5173\u3002<\/p>\n

\n\t\u5b9e\u9645\u6b63\u5f26\u6ce2\u7684\u4fe1\u53f7\u7279\u5f81\u6bd4\u7406\u60f3\u4fe1\u53f7\u8981\u590d\u6742\u7684\u591a\uff0c\u9700\u8981\u8003\u8651\u76f8\u4f4d\u566a\u58f0\uff0c\u5bc4\u751f\u8c03\u9891\uff0c\u6742\u6563\uff0c\u5982\u56fe4\u6240\u793a\u3002\u76f8\u4f4d\u566a\u58f0\u5728\u9891\u57df\u53cd\u6620\u4e3a\u566a\u58f0\u8fb9\u5e26\uff0c\u5728\u65f6\u57df\u4e0a\u53cd\u6620\u4e3a\u968f\u673a\u7684\u76f8\u4f4d\u6296\u52a8\uff0c\u53ef\u7406\u89e3\u4e3a\u6709\u968f\u673a\u7684\u566a\u58f0\u5bf9\u7406\u60f3\u6b63\u5f26\u4fe1\u53f7\u8fdb\u884c\u8c03\u76f8\u3002<\/p>\n

\n\t<\/p>\n

\n\t<\/p>\n

\n\t\u56fe4 \u5b9e\u9645\u6b63\u5f26\u6ce2\u7684\u4fe1\u53f7\u7279\u5f81<\/p>\n

\n\t\u6b63\u5f26\u6ce2\u6216\u8fde\u7eed\u6ce2\u4fe1\u53f7\u8d28\u91cf\u597d\u574f\u7684\u8bc4\u4f30\u4e3b\u8981\u5728\u9891\u57df\u4e0a\u8fdb\u884c\uff0c\u9891\u57df\u4e0a\u7684\u6742\u6563\u5305\u542b\u8fde\u7eed\u548c\u79bb\u6563\u6210\u4efd\uff0c\u5b83\u4eec\u90fd\u5bf9\u5e94\u65f6\u57df\u4e0a\u7684\u5931\u771f\u3002\u8fde\u7eed\u7684\u566a\u58f0\u8fb9\u5e26\u79f0\u4e3a\u76f8\u4f4d\u566a\u58f0\uff0c\u79bb\u6563\u7684\u6742\u6563\u6839\u636e\u5176\u4e0e\u57fa\u6ce2\u7684\u9891\u7387\u5173\u7cfb\u5206\u4e3a\u8c10\u6ce2\u548c\u6742\u6ce2\u3002<\/p>\n

\n\t\u76f8\u4f4d\u566a\u58f0\u4e3b\u8981\u7531\u632f\u8361\u5668\u5185\u90e8\u566a\u58f0\u5e26\u6765\uff0c\u800c\u8c10\u6ce2\u6742\u6ce2\u7684\u5f62\u6210\u4e0e\u5668\u4ef6\u7684\u975e\u7ebf\u6027\u6709\u5173\uff1a<\/p>\n

\n\tvo\uff08t\uff09 =a1 vi\uff08t\uff09 + a2 vi2\uff08t\uff09 + a3 vi3\uff08t\uff09 + \u3002..<\/p>\n

\n\t\u82e5\u8f93\u5165\u4e3a\u7406\u60f3\u6b63\u5f26\u4fe1\u53f7\uff0c\u901a\u8fc7\u975e\u7ebf\u6027\u4f5c\u7528\u8f93\u51fa\u4e3a\uff1a<\/p>\n

\n\tvo\uff08t\uff09 =a1 sin\uff08wt\uff09 + a2 sin2\uff08wt\uff09 + a3 sin3\uff08wt\uff09 + \u3002..<\/p>\n

\n\t=a2\/2 + a1 sin\uff08wt\uff09 + 3a3\/4 sin\uff08wt\uff09+ a2\/2 sin\uff082wt\uff09 + a3\/4 sin\uff083wt\uff09 + \u3002..<\/p>\n

\n\t<\/p>\n

\n\t\u56fe5 \u6b63\u5f26\u4fe1\u53f7\u7684\u76f8\u4f4d\u566a\u58f0\u5b9a\u4e49<\/p>\n

\n\t\u76f8\u4f4d\u566a\u58f0\u6307\u6807\u4e3b\u8981\u5728\u9891\u57df\u4e0a\u8fdb\u884c\u63cf\u8ff0\uff0c\u7528\u4e00\u5b9a\u9891\u504f\uff08offset\uff09\u4e0b\u5355\u8fb9\u5e26\uff08SSB\uff09\u566a\u58f0\u529f\u7387\u8c31\u5bc6\u5ea6\u4e0e\u8f7d\u6ce2\u529f\u7387\u6bd4\u503c\u6765\u8868\u793a\u3002\u5de5\u7a0b\u4e0a\u8003\u5bdf\u7684\u9891\u504f\u8303\u56f4\u4e3a\uff1a10Hz ~ 1MHz\uff0c \u9891\u504f\u6a2a\u5ea7\u6807\u7528\u5bf9\u6570\u8868\u793a\u3002<\/p>\n

\n\t\u4e8c\u3001\u70b9\u9891\u4fe1\u53f7\u6e90<\/p>\n

\n\t\u4e00\u822c\u6765\u8bf4\uff0c\u70b9\u9891\u4fe1\u53f7\u6e90\u7531\u4e09\u90e8\u5206\u7ec4\u6210\uff1a<\/p>\n

\n\t1. \u53c2\u8003\u6e90\u90e8\u5206\uff1a\u51b3\u5b9a\u6574\u4e2a\u4fe1\u53f7\u6e90\u9891\u7387\u7a33\u5b9a\u5ea6\uff1b<\/p>\n

\n\t2. \u9891\u7387\u5408\u6210\u90e8\u5206\uff1a\u51b3\u5b9a\u8f93\u51fa\u4fe1\u53f7\u9891\u7387\u53c2\u6570\uff1b<\/p>\n

\n\t3. \u8f93\u51fa\u529f\u7387\u63a7\u5236\u90e8\u5206\uff1a\u51b3\u5b9a\u8f93\u51fa\u4fe1\u53f7\u529f\u7387\u53c2\u6570<\/p>\n

\n\t<\/p>\n

\n\t\u56fe6 \u4fe1\u53f7\u6e90\u7ec4\u6210\u6846\u56fe<\/p>\n

\n\t\u5408\u6210\u6ee1\u8db3\u5404\u9879\u6307\u6807\u8981\u6c42\u4fe1\u53f7\u7684\u6280\u672f\u79f0\u4e3a\u9891\u7387\u5408\u6210\u6280\u672f\uff0c\u5bf9\u4fe1\u53f7\u9891\u7387\u8fdb\u884c\u5408\u6210\u7684\u65b9\u5f0f\u4e3b\u8981\u6709\u4e09\u79cd\uff1a<\/p>\n

\n\t1.\u76f4\u63a5\u9891\u7387\u5408\u6210<\/p>\n

\n\t\u5229\u7528\u632f\u8361\u5668\u76f4\u63a5\u8f93\u51fa\u8981\u6c42\u7684\u9891\u7387\u4fe1\u53f7\uff0c\u6676\u4f53\u632f\u8361\u5668\u56e0\u5176Q\u503c\u9ad8\u800c\u5f97\u5230\u5e7f\u6cdb\u5e94\u7528\uff0c\u91c7\u7528\u6052\u6e29\u6676\u632f\u548c\u7a33\u8865\u6676\u632f\u53ef\u8fdb\u4e00\u6b65\u63d0\u9ad8\u5176\u9891\u7387\u7a33\u5b9a\u5ea6\u3002\u4e3b\u8981\u5e94\u7528\u4e8e\u5355\u70b9\u9891\u7387\u4fe1\u53f7\u5408\u6210\u3002<\/p>\n

\n\t2. \u95f4\u63a5\u9891\u7387\u5408\u6210<\/p>\n

\n\t\u5229\u7528PLL\u9501\u76f8\u73af\u8fdb\u884c\u9891\u7387\u5408\u6210\uff0c\u5176\u7279\u70b9\u662f\u53ef\u8f93\u51fa\u5bbd\u9891\u7387\u8303\u56f4\u4fe1\u53f7\uff0c\u9891\u7387\u53d8\u5316\u6b65\u8fdb\u8f83\u5c0f\uff0c\u9891\u7387\u8df3\u53d8\u901f\u5ea6\u8f83\u5feb\u3002\u4f46\u5b58\u5728\u9891\u7387\u53d8\u5316\u6b65\u8fdb\u548c\u76f8\u566a\u6307\u6807\u76f8\u77db\u76fe\u7684\u7f3a\u70b9\u3002PLL\u95f4\u63a5\u9891\u7387\u5408\u6210\u662f\u9891\u7387\u5408\u6210\u7684\u4e3b\u8981\u65b9\u5f0f\u3002<\/p>\n

\n\t3.\u76f4\u63a5\u6570\u5b57\u5408\u6210\uff08DDS\uff09<\/p>\n

\n\t\u5229\u7528\u6570\u5b57\u6280\u672f\u8fdb\u884c\u4fe1\u53f7\u6ce2\u5f62\u5408\u6210\uff0c\u5176\u7279\u70b9\u662f\u8f93\u51fa\u9891\u7387\u6b65\u8fdb\u6307\u6807\u5f88\u9ad8\uff0c\u9891\u7387\u8df3\u53d8\u901f\u5ea6\u5f88\u5feb\uff0c\u4f46\u8f93\u51fa\u9891\u7387\u8303\u56f4\u8f83\u7a84\u3002<\/p>\n

\n\t<\/p>\n

\n\t\u56fe7 \u4fe1\u53f7\u6e90\u9891\u7387\u5408\u6210\u6280\u672f\u53ca\u5176\u4f18\u7f3a\u70b9<\/p>\n

\n\t\u76f4\u63a5\u9891\u7387\u5408\u6210\u6280\u672f\u539f\u7406\u6846\u56fe\u5982\u4e0b\u56fe\u6240\u793a\u3002\u91c7\u7528\u6e29\u8865\u6676\u632f\u548c\u6052\u6e29\u6676\u632f\u53ef\u4ee5\u63d0\u9ad8\u6676\u4f53\u632f\u8361\u5668\u7684\u9891\u7387\u7a33\u5b9a\u5ea6\u3002<\/p>\n

\n\t<\/p>\n

\n\t\u56fe8 \u76f4\u63a5\u9891\u7387\u5408\u6210\u539f\u7406\u6846\u56fe<\/p>\n

\n\t\u95f4\u63a5\u9891\u7387\u5408\u6210\u6280\u672f\u539f\u7406\u6846\u56fe\u5982\u4e0b\u56fe\u6240\u793a\u3002\u9501\u76f8\u73af\u7531\u9274\u76f8\u5668\uff1b\u73af\u8def\u6ee4\u6ce2\u5668<\/u>\uff1b\u538b\u63a7\u632f\u8361\u5668\uff08VCO\uff09\uff1b\u5206\u9891\u5668\u7b49\u7ec4\u6210\u3002<\/p>\n

\n\t\u4ece\u9891\u7387\u5173\u7cfb\u4e0a\u5206\u6790\uff0cPLL\u76f8\u5f53\u4e8e\u4e00\u4e2a\u500d\u9891\u5668\uff1aPLL\u8f93\u51fa\u4fe1\u53f7\u9891\u7387\u53d8\u5316\u6b65\u8fdb\u4e3a\u5176\u9274\u76f8\u5668\u5de5\u4f5c\u9891\u7387\u3002<\/p>\n

\n\t\u5982\u679c\u8981\u6c42\u9891\u7387\u53d8\u5316\u6b65\u8fdb\u8d8a\u5c0f\uff0c\u9274\u76f8\u9891\u7387\u76f8\u5e94\u53d8\u5c0f\uff0c\u800c\u8981\u4fdd\u8bc1\u8f93\u51fa\u9891\u7387\u503c\u5219N\u503c\u76f8\u5e94\u53d8\u5927\u3002\u8f83\u5c0f\u7684\u9274\u76f8\u9891\u7387\u4f1a\u4f7fPLL\u73af\u8def\u5e26\u5bbd\u76f8\u5e94\u51cf\u5c0f\uff0c\u4ece\u800c\u4f7fPLL\u52a8\u6001\u6027\u80fd\uff08\u9891\u7387\u8df3\u53d8\u901f\u5ea6\uff09\u53d8\u574f\u3002<\/p>\n

\n\t<\/p>\n

\n\t\u56fe9 \u95f4\u63a5\u9891\u7387\u5408\u6210\u539f\u7406\u6846\u56fe<\/p>\n

\n\t\u5bf9PLL\u8f93\u51fa\u4fe1\u53f7\u7684\u76f8\u4f4d\u566a\u58f0\u6307\u6807\u8fdb\u884c\u5206\u6790\u3002<\/p>\n

\n\t\u5bf9\u53c2\u8003\u6e90\uff0cPLL \u4e3a\u4f4e\u901a\u7279\u6027\uff0c\u5e26\u5bbd\u4e3a\u73af\u8def\u5e26\u5bbd\u3002PLL\u8f93\u51fa\u76f8\u566a\u662f\u53c2\u8003\u4fe1\u53f7\u76f8\u566a\u6309N\u500d\u9891\u6076\u5316\u3002N\u8d8a\u5927\uff0cPLL\u8f93\u51fa\u76f8\u566a\u6307\u6807\u8d8a\u5dee\u3002\u5728\u73af\u8def\u5e26\u5bbd\u5916\uff0cPLL\u8f93\u51fa\u76f8\u566a\u7531VCO \u51b3\u5b9a\u3002<\/p>\n

\n\t<\/p>\n

\n\t\u56fe10 \u9501\u76f8\u73af\u8f93\u51fa\u76f8\u4f4d\u566a\u58f0\u6307\u6807<\/p>\n

\n\t\u63d0\u9ad8PLL\u8f93\u51fa\u4fe1\u53f7\u76f8\u4f4d\u566a\u58f0\u6307\u6807\u7684\u539f\u5219\u662f\u51cf\u5c0f\u5206\u9891\u6bd4N\uff0c\u901a\u8fc7\u91c7\u7528\u591a\u9501\u76f8\u73af\u548c\u5c0f\u6570\u5206\u9891\u6280\u672f\u53ef\u4ee5\u5b9e\u73b0\u4ee5\u4e0a\u76ee\u7684\u3002<\/p>\n

\n\t<\/p>\n

\n\t\u56fe11 \u6539\u5584PLL\u8f93\u51fa\u4fe1\u53f7\u76f8\u566a\u7684\u65b9\u6cd5<\/p>\n

\n\t\u76f4\u63a5\u6570\u5b57\u9891\u7387\u5408\u6210DDS\u662f\u968f\u7740\u6570\u5b57\u6280\u672f\u7684\u53d1\u5c55\u800c\u51fa\u73b0\u7684\u65b0\u6280\u672f\uff0c\u539f\u7406\u6846\u56fe\u5982\u4e0b\u56fe\u6240\u793a\u3002DDS\u7531\u76f8\u4f4d\u7d2f\u52a0\u5668\uff1bROM<\/u> \u8868\uff1bDAC<\/u>\uff1b\u4f4e\u901a\u6ee4\u6ce2\u5668\u7ec4\u6210\u3002<\/p>\n

\n\t<\/p>\n

\n\t\u56fe12 DDS\u76f4\u63a5\u6570\u5b57\u5408\u6210\u6280\u672f\u539f\u7406\u6846\u56fe<\/p>\n

\n\t\u4fe1\u53f7\u6e90\u5229\u7528ALC\uff08\u81ea\u52a8\u7535\u5e73\u63a7\u5236\uff09\u6280\u672f\u6765\u4fdd\u8bc1\u8f93\u51fa\u4fe1\u53f7\u7684\u5e45\u5ea6\u3002\u5927\u8303\u56f4\u5e45\u5ea6\u8c03\u6574\u7531\u8870\u51cf\u5668\u5b8c\u6210\u3002<\/p>\n

\n\t<\/p>\n

\n\t\u56fe13 \u4fe1\u53f7\u6e90\u8f93\u51fa\u4fe1\u53f7\u529f\u7387\u7684\u63a7\u5236<\/p>\n

\n\t\u70b9\u9891\u4fe1\u53f7\u6e90\u7684\u5e94\u7528\uff1a<\/p>\n

\n\t1.\u7cfb\u7edf\u672c\u632f\uff1a<\/p>\n

\n\t–\u76f8\u4f4d\u566a\u58f0<\/p>\n

\n\t–\u9891\u7387\u7cbe\u5ea6<\/p>\n

\n\t2.\u5668\u4ef6\u5931\u771f\u6027\u80fd\u6d4b\u8bd5<\/p>\n

\n\t–\u6742\u6563<\/p>\n

\n\t–\u4e09\u9636\u5931\u771fTOI<\/p>\n

\n\t3.\u63a5\u6536\u673a\u6d4b\u8bd5\uff1a<\/p>\n

\n\t–\u8c03\u5236\u65b9\u5f0f<\/p>\n

\n\t–\u5e45\u5ea6\u7cbe\u5ea6<\/p>\n

\n\t–\u6742\u6563\u6027\u80fd<\/p>\n

\n\t\u529f\u7387\u626b\u63cf\u9700\u8981\u5173\u6ce8\uff1a\u529f\u7387\u626b\u63cf\u8303\u56f4\uff0c\u529f\u7387\u659c\u7387\u8303\u56f4\uff0c\u6e90\u5339\u914d\u3002\u529f\u7387\u626b\u63cf\u901a\u8fc7\uff1a\u81ea\u52a8\u7535\u5e73\u63a7\u5236ALC\uff0cALC\u68c0\u6d4b\u5668\uff0cALC\u9a71\u52a8\u5668\u548cALC\u8c03\u5236\u5668\u914d\u5408\u5b8c\u6210\u3002<\/p>\n

\n\t\u4e09\u3001\u6a21\u62df\u4fe1\u53f7\u53d1\u751f\u5668\u5373\u6a21\u62df\u8c03\u5236\u4fe1\u53f7\u6e90<\/p>\n

\n\t\u8c03\u5236\u4fe1\u53f7\u6839\u636e\u5176\u8c03\u5236\u4fe1\u53f7\u7684\u4e0d\u540c\u53ef\u5206\u4e3a\u6a21\u62df\u8c03\u5236\u548c\u6570\u5b57\u8c03\u5236\u3002<\/p>\n

\n\t\u6b63\u5f26\u6ce2\u4fe1\u53f7\u542b\u6709\u4e09\u4e2a\u72ec\u7acb\u53c2\u6570\uff0c\u5e45\u5ea6\uff0c\u9891\u7387\u548c\u76f8\u4f4d\u3002\u5982\u679c\u4e00\u4e2a\u8fde\u7eed\u6b63\u5f26\u6ce2\u672a\u8c03\u5236\u7684\u8bdd\uff0c\u90a3\u5b83\u7684\u5305\u7edc\u5e45\u5ea6\uff0c\u632f\u52a8\u9891\u7387\u4ee5\u53ca\u521d\u76f8\u6c38\u8fdc\u4f1a\u662f\u4e00\u4e2a\u5e38\u6570\uff08\u4e0d\u8003\u8651\u566a\u58f0\u56e0\u7d20\uff09\uff0c\u8fd9\u6837\u7684\u6b63\u5f26\u6ce2\u4fe1\u606f\u91cf\u4e3a\u96f6\u3002\u6211\u4eec\u4f20\u7edf\u7684\u6a21\u62df\u8c03\u5236\uff0c\u5c31\u662f\u7528\u8c03\u5236\u4fe1\u53f7\u6539\u53d8\u8f7d\u6ce2\u7684\u8fd9\u4e09\u4e2a\u53c2\u91cf\uff0c\u4f7f\u8f7d\u6ce2\u643a\u5e26\u8c03\u5236\u7684\u4fe1\u606f\uff0c\u4ece\u4e00\u7aef\u4f20\u5230\u53e6\u4e00\u7aef\u3002<\/p>\n

\n\t\u4e3a\u4ec0\u4e48\u8c03\u5236\u4fe1\u53f7\u8981\u88ab\u8c03\u5236\u5230\u8f7d\u6ce2\u4e0a\u53bb\u5462\uff1f\u8f7d\u6ce2\u7684\u529f\u80fd\u5728\u4e8e\uff1a\u4f7f\u7528\u4e00\u4e2a\u66f4\u9ad8\u7684RF\u6216MW\u9891\u7387\u4f5c\u4e3a\u8f7d\u6ce2\uff0c\u8fd9\u6837\u4fe1\u606f\u4f1a\u4f7f\u4f20\u64ad\u66f4\u8fdc\uff0c\u5982\u7528\u57fa\u5e26\u4f20\u64ad\uff0c\u8ddd\u79bb\u4e00\u822c\u4f1a\u8d8a\u8fd1\u8d8a\u597d\uff0c\u6253\u4e2a\u6bd4\u65b9\uff0c\u5c31\u597d\u6bd4\u4f60\u7528\u7535\u8bdd\u4e0e\u5927\u697c\u5185\u5176\u4ed6\u540c\u4e8b\u8054\u7cfb\u6bd4\u4f60\u7ad9\u5728\u8d70\u5eca\u4e0a\u5927\u558a\u5927\u53eb\u8981\u65b9\u4fbf\u548c\u7701\u529b\u591a\u4e86\u3002\u5f88\u591a\u4eba\u60f3\u8c61\u6570\u5b57\u8c03\u5236\u662f\u4e00\u79cd\u65b0\u6280\u672f\uff0c\u4f46\u5b9e\u9645\u4e0a\u6240\u6709\u8c03\u5236\u65b9\u5f0f\u90fd\u53ef\u5f52\u7ed3\u4e3a\u57fa\u672c\u4e3aAM\uff0cFM\u548cPM\u3002<\/p>\n

\n\t<\/p>\n

\n\t\u56fe14 \u8c03\u5236\u4fe1\u606f\u6240\u5728\u4f4d\u7f6e<\/p>\n

\n\t\u8c03\u5e45AM\u4fe1\u53f7\u9700\u4ee5\u4e0b\u53c2\u6570\uff1a<\/p>\n

\n\t1.\u8f7d\u6ce2\u9891\u7387<\/p>\n

\n\t2.\u8c03\u5236\u4fe1\u53f7\u9891\u7387<\/p>\n

\n\t3.\u8c03\u5236\u6307\u6570<\/p>\n

\n\t<\/p>\n

\n\t\u56fe15 \u5e45\u5ea6\u8c03\u5236AM<\/p>\n

\n\t\u8c03\u9891FM\u4fe1\u53f7\u9700\u4ee5\u4e0b\u53c2\u6570\uff1a<\/p>\n

\n\t1.\u8f7d\u6ce2\u9891\u7387<\/p>\n

\n\t2.\u8c03\u5236\u4fe1\u53f7\u9891\u7387<\/p>\n

\n\t3.\u8c03\u5236\u9891\u504f<\/p>\n

\n\t4.\u8c03\u5236\u6307\u6570<\/p>\n

\n\t<\/p>\n

\n\t\u56fe16 \u9891\u7387\u8c03\u5236FM<\/p>\n

\n\t<\/p>\n

\n\t\u56fe17 \u76f8\u4f4d\u8c03\u5236PM<\/p>\n

\n\t<\/p>\n

\n\t\u56fe18 \u8109\u51b2\u8c03\u5236<\/p>\n

\n\t<\/p>\n

\n\t\u56fe19 \u6a21\u62df\u8c03\u5236\u4fe1\u53f7\u6e90\u539f\u7406\u6846\u56fe<\/p>\n

\n\t\u4e09\u3001\u77e2\u91cf\u4fe1\u53f7\u53d1\u751f\u5668\u5373\u6570\u5b57\u8c03\u5236\u4fe1\u53f7\u6e90<\/p>\n

\n\t<\/p>\n

\n\t\u56fe20 \u5404\u79cd\u8c03\u5236\u65b9\u5f0f\u6ce2\u5f62\u5bf9\u6bd4<\/p>\n

\n\t\u7528\u77e2\u91cf\u6765\u63cf\u8ff0\u4e00\u4e2a\u6b63\u5f26\u6ce2\u662f\u975e\u5e38\u65b9\u4fbf\u7684\u3002\u5728\u6781\u5750\u6807\u4e2d\uff0c\u77e2\u91cf\u8868\u793a\u6b63\u5f26\u6ce2\u7684\u5cf0\u503c\u7535\u538b\u5e45\u5ea6\u5bf9\u4e8e\u76f8\u4f4d\u6539\u53d8\u91cf\u7684\u5173\u7cfb\u3002\u76f8\u4f4d\u65cb\u8f6c360\u5ea6\u8868\u793a\u4e00\u4e2a\u5b8c\u6574\u7684\u9891\u7387\u5468\u671f\u3002\u8bf7\u6ce8\u610f\uff0c\u76f8\u5411\u7b26\u53f7\u63d0\u4f9b\u4e86\u4e00\u79cd\u8868\u793a\u6b63\u5f26\u6ce2\u76f8\u4f4d\u968f\u65f6\u95f4\u53d8\u5316\u7684\u4fbf\u6377\u65b9\u6cd5\u3002\u56fe\u4e2d\u793a\u6ce2\u5668<\/u>\u8868\u793a\u4e86\u4e00\u79cd\u4fe1\u53f7\u5e45\u5ea6\u968f\u65f6\u95f4\u53d8\u5316\u7684\u8fc7\u7a0b\u3002\u5411\u91cf\u4e0d\u80fd\u76f4\u63a5\u63d0\u4f9b\u4efb\u4f55\u9891\u7387\u4fe1\u606f\u3002\u4e8b\u5b9e\u4e0a\uff0c\u6211\u4eec\u6d4b\u91cf\u5411\u91cf\u76f8\u5bf9\u4e8e\u8f7d\u6ce2\u4fe1\u53f7\u7684\u53c2\u8003\u76f8\u4f4d\u3002\u8fd9\u6837\u4f5c\u610f\u5473\u7740\uff0c\u77e2\u91cf\u4ec5\u5728\u9891\u7387\u4e0d\u540c\u65f6\u4f1a\u53d1\u751f\u65cb\u8f6c\u3002<\/p>\n

\n\t<\/p>\n

\n\t\u56fe21 \u6781\u5750\u6807\u4e2d\uff0c\u7528\u77e2\u91cf\u6765\u63cf\u8ff0\u4e00\u4e2a\u6b63\u5f26\u6ce2<\/p>\n

\n\t\u4e0b\u56fe\u5404\u79cd\u8c03\u5236\u4fe1\u53f7\u5728I\/Q\u5e73\u9762\u8868\u793a\u7684\u4f8b\u5b50\u3002\u7406\u89e3\u4e86\u5b83\u4eec\uff0c\u4f60\u5bf9\u6240\u6709I\/Q\u8c03\u5236\u539f\u7406\u4e5f\u5c31\u7406\u89e3\u4e86\u3002\u5728\u4efb\u4f55I\/Q\u56fe\u4e2d\uff0c\u5982\u56fe\u4fe1\u53f7\u6cbf\u5f84\u5411\u6539\u53d8\u5e45\u5ea6\uff0c\u610f\u5473\u7740\u4fe1\u53f7\u76f8\u4f4d\u5728\u53d8\u5316\uff08\u4e14\u4ec5\u4ec5\u662f\u76f8\u4f4d\u53d1\u751f\u53d8\u5316\uff09\u3002\u6240\u4ee5AM\u8c03\u5236\uff0cI\/Q\u56fe\u4e2d\u4ec5\u662f\u77e2\u91cf\u5f84\u5411\u53d8\u5316\u3002PM\u8c03\u5236\u662f\u77e2\u91cf\u65cb\u8f6c\u3002FM\u770b\u8d77\u6765\u8c61PM\uff0c\u56e0\u4e3a\u504f\u79bb\u8f7d\u6ce2\u9891\u7387\u5c31\u662f\u5355\u4f4d\u65f6\u95f4\u5185\u76f8\u4f4d\u7684\u53d8\u5316\u3002\u8bb0\u4f4f\uff0c\u5e45\u5ea6\u548c\u76f8\u4f4d\u53d8\u5316\u90fd\u662f\u76f8\u5bf9\u4e8e\u672a\u8c03\u5236\u8f7d\u6ce2\u7684\u3002\u5931\u91cf\u56fe\uff08Vector diagram<\/u>\uff09 \u662f\u63cf\u8ff0\u77e2\u91cf\u4fe1\u53f7\u53d8\u5316\u8f68\u8ff9\u7684\u4e00\u79cd\u76f4\u89c2\u65b9\u5f0f\u3002<\/p>\n

\n\t<\/p>\n

\n\t\u56fe22 \u6781\u5750\u6807\u4e2d\u7684\u4fe1\u53f7\u6539\u53d8<\/p>\n

\n\t\u77e2\u91cf\u7684\u76f8\u4f4d\u76f4\u63a5\u6d4b\u91cf\u6bd4\u8f83\u56f0\u96be\u3002\u5b9e\u9645\u7684\u63a5\u6536\u673a\u548c\u6d4b\u91cf\u7cfb\u7edf\u4f7f\u7528I\/Q\u89e3\u8c03\u65b9\u5f0f\u3002\u5b83\u628a\u4fe1\u53f7\u76f8\u4f4d\u7684\u63a7\u5236\u95ee\u9898\u8f6c\u6362\u62102\u8def\u6b63\u4ea4\u5206\u91cf\u7535\u538b\u7684\u63a7\u5236\u95ee\u9898\u3002<\/p>\n

\n\t\u9996\u5148\u56e0\u4e3a\u5b83\u7b80\u5355\uff0c\u63a5\u53e3\u7b80\u5355\uff0c\u7535\u8def\u7b80\u5355\uff0c\u57fa\u5e26\u5b9e\u73b0\u7b80\u5355\uff1b\u7b2c\u4e8c\uff0cI\/Q\u8868\u793a\u4e86\u5bf9\u8c03\u5236\u4fe1\u53f7\u6b63\u4ea4\u53d8\u91cf\uff0c\u4e00\u4e2a\u4fe1\u53f7\u76f8\u5bf9\u4e8e\u8f7d\u6ce290\u5ea6\u76f8\u79fb\uff0c\u5982\u679c\u4ec5\u7528I\u901a\u9053\u68c0\u6d4b\uff0c\u7531\u4e8eCOS\uff0890°\uff09=0\uff0c \u867d\u7136\u8f93\u5165\u4fe1\u53f7\u5b58\u5728\uff0c\u4f46I\u8def\u8f93\u51fa\u4e3a0V\uff0c \u90a3I\u8def\u65e0\u8f93\u51fa\u4fe1\u53f7\u3002\u6240\u4ee5\uff0c\u901a\u8fc7\u5206\u522b\u6d4b\u91cf\u4fe1\u53f7\u540c\u76f8\u548c\u6b63\u4ea4\u5206\u91cf\uff0c\u6211\u4eec\u4e0d\u7528\u76f4\u63a5\u53bb\u6d4b\u91cf\u4fe1\u53f7\u7684\u76f8\u5bf9\u76f8\u4f4d\u3002<\/p>\n

\n\tI\/Q\u89e3\u8c03\u5668\u53ef\u6d4b\u91cf\u5e45\u5ea6\u548c\u76f8\u4f4d\uff0c\u90a3\u9891\u7387\u53c2\u91cf\u600e\u4e48\u529e\u5462\uff1f\u9891\u7387\u662f\u76f8\u4f4d\u76f8\u5bf9\u4e8e\u65f6\u95f4\u7684\u53d8\u5316\uff0cI\/Q\u89e3\u8c03\u5668\u5b9e\u9645\u4e0a\u76f4\u63a5\u6d4b\u91cf\u6240\u6709\u7c7b\u578b\u7684\u8c03\u5236\u800c\u4e0d\u662f\u4ec5\u5bf9AM\uff0cPM\uff0cFM\u8c03\u5236\u4fe1\u53f7\u8fdb\u884c\u6d4b\u91cf\u3002<\/p>\n

\n\t<\/p>\n

\n\t\u56fe23 I-Q\u683c\u5f0f\u5750\u6807<\/p>\n

\n\t<\/p>\n

\n\t\u56fe24 BPSK\u65f6\u57df\u9891\u57df\u7279\u5f81<\/p>\n

\n\t<\/p>\n

\n\t\u56fe25 QPSK\u65f6\u57df\u548c\u661f\u5ea7\u56fe\u6620\u5c04<\/p>\n

\n\t\u89c2\u5bdf\u6570\u5b57\u8c03\u5236\u4fe1\u53f7\u7684\u4ee4\u4e00\u79cd\u65b9\u6cd5\u662f\u91c7\u7528\u773c\u56fe\u3002\u53ef\u751f\u6210\u4e24\u5f20\u4e0d\u540c\u7684\u773c\u56fe\uff0c\u4e00\u5f20\u662fI\u901a\u9053\u6570\u636e\uff0c\u53e6\u4e00\u5f20\u662fQ\u901a\u9053\u6570\u636e\u3002<\/p>\n

\n\t\u773c\u56fe\u4ee5\u65e0\u9650\u6301\u7eed\u7684\u65b9\u5f0f\u53cd\u590d\u663e\u793aI\u548cQ\u5e45\u5ea6\u5bf9\u65f6\u95f4\u3002I\u548cQ\u8f6c\u6362\u53ef\u5355\u72ec\u663e\u793a\uff0c\u5728\u786e\u5b9a\u7b26\u53f7\u7684\u65f6\u523b\u5f62\u6210“\u773c\u775b”\u3002QPSK\u67094\u4e2a\u4e0d\u540cI\/Q\u72b6\u6001\uff0c\u5404\u5728\u4e00\u4e2a\u8c61\u9650\u3002I\/Q\u5404\u6709\u4e24\u4e2a\u7535\u5e73\uff0c\u5bf9\u6bcf\u4e2aI\u548cQ\u5f62\u6210\u4e00\u4e2a\u773c\u775b\u3002\u4e0b\u9762\u4e00\u5f20\u56fe\u662f16QAM\u7684\u4f8b\u5b50\uff0c4\u7535\u5e73\u56f4\u62103\u53ea\u773c\u3002\u91cd\u8981\u7684\u662f\u7406\u89e3\u773c\u56fe\u7684\u6982\u5ff5\u3002\u597d\u7684\u4fe1\u53f7\u5177\u6709“\u5f20\u5927”\u7684\u773c\u775b\uff0c\u4ea4\u70b9\u5bf9\u5e94\u661f\u5ea7\u56fe\u4e0a\u7b26\u53f7\u70b9\u4f4d\u7f6e\uff0c\u8c03\u5236\u8d28\u91cf\u8d8a\u9ad8\uff0c\u4ea4\u70b9\u8d8a\u96c6\u4e2d\u3002<\/p>\n

\n\t<\/p>\n

\n\t\u56fe26 I\u548cQ\u773c\u56fe<\/p>\n

\n\t<\/p>\n

\n\t\u56fe27 QAM\u7684\u77e2\u91cf\u56fe\u548c\u661f\u5ea7\u56fe<\/p>\n

\n\t<\/p>\n

\n\t\u56fe28 \u77e2\u91cf\u8c03\u5236\u7279\u5f81\u5bf9\u6bd4<\/p>\n

\n\t<\/p>\n

\n\t\u56fe29 \u77e2\u91cf\u4fe1\u53f7\u53d1\u751f\u5668\u539f\u7406\u6846\u56fe<\/p>\n

\n\t<\/p>\n

\n\t\u56fe30 \u77e2\u91cf\u4fe1\u53f7\u53d1\u751f\u5668\u4e2d\u7684\u57fa\u5e26\u4fe1\u53f7\u53d1\u751f\u5668<\/p>\n

\n\t<\/p>\n

\n\t\u56fe31 \u57fa\u5e26\u4fe1\u53f7\u53d1\u751f\u5668\u4e2d\u7684\u6ee4\u6ce2\u5668\u4f5c\u7528<\/p>\n

\n\tIQ\u8c03\u5236\u5668\uff1aI\u548cQ\u8def\u4fe1\u53f7\u7531\u540c\u4e00\u672c\u632f\u4fe1\u53f7\u5408\u6210\uff0c\u4f46\u672c\u632f\u670990\u5ea6\u76f8\u79fb\uff0cI\/Q\u8def\u4e92\u4e0d\u5e72\u6270\uff0c\u6700\u540e\u5f97\u5230\u4e00\u548c\u8def\u4fe1\u53f7\u3002<\/p>\n

\n\t<\/p>\n

\n\t\u56fe32 \u77e2\u91cf\u4fe1\u53f7\u53d1\u751f\u5668\u4e2d\u7684IQ\u8c03\u5236\u5668<\/p>\n

\n\t\u77e2\u91cf\u4fe1\u53f7\u53d1\u751f\u5668\u4e3b\u8981\u5e94\u7528\uff1a<\/p>\n

\n\t•\u4ea7\u751f\u5177\u4f53\u683c\u5f0f\u7684\u77e2\u91cf\u4fe1\u53f7<\/p>\n

\n\t•\u63a5\u6536\u7075\u654f\u5ea6\u6d4b\u91cf<\/p>\n

\n\t•\u63a5\u6536\u673a\u9009\u901a\u6027\u6d4b\u91cf<\/p>\n

\n\t•\u5668\u4ef6\u5931\u771f\u6d4b\u91cf<\/p>\n","protected":false},"excerpt":{"rendered":"

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