{"id":1192,"date":"2022-03-31T13:00:10","date_gmt":"2022-03-31T05:00:10","guid":{"rendered":"http:\/\/www.xzclass.com\/?p=1192"},"modified":"2022-04-06T09:43:58","modified_gmt":"2022-04-06T01:43:58","slug":"%e5%85%b3%e4%ba%8e%e5%85%89%e9%80%9a%e4%bf%a1%e7%9a%84%e6%9c%80%e5%bc%ba%e8%bf%9b%e9%98%b6%e7%a7%91%e6%99%ae","status":"publish","type":"post","link":"http:\/\/www.xzclass.com\/?p=1192","title":{"rendered":"\u5173\u4e8e\u5149\u901a\u4fe1\u7684\u6700\u5f3a\u8fdb\u9636\u79d1\u666e"},"content":{"rendered":"

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\u6ce2\u7279\u7387\uff08Baud\uff09\uff0c\u51c6\u786e\u6765\u8bf4\u5c31\u53eb\u6ce2\u7279\uff0c\u53eb\u6ce2\u7279\u7387\u53ea\u662f\u53e3\u8bed\u4e60\u60ef\u3002\u5b83\u7684\u5b9a\u4e49\u662f\uff1a\u5355\u4f4d\u65f6\u95f4\u5185\u4f20\u9001\u7684\u7801\u5143\u7b26\u53f7\uff08Symbol\uff09\u7684\u4e2a\u6570\u3002<\/span><\/p>\n

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\u7136\u800c\uff0c\u6ce2\u7279\u7387\u5e76\u4e0d\u662f\u65e0\u9650\u5927\u7684\u3002\u8d8a\u5f80\u4e0a\uff0c\u6280\u672f\u5b9e\u73b0\u96be\u5ea6\u8d8a\u9ad8\u3002\u9ad8\u6ce2\u7279\u7387\u5668\u4ef6\uff0c\u4f1a\u5e26\u6765\u4e00\u7cfb\u5217\u7cfb\u7edf\u6027\u80fd\u635f\u4f24\u95ee\u9898\uff0c\u9700\u8981\u66f4\u5148\u8fdb\u7684\u7b97\u6cd5\u548c\u786c\u4ef6\u8fdb\u884c\u8865\u507f\u3002
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\u5bf9\u4e8e\u4e8c\u8fdb\u5236\u4fe1\u53f7\uff0c0\u548c1\uff0c1\u4e2a\u7b26\u53f7\u5c31\u662f1\u6bd4\u7279\uff08bit\uff09\u3002\u90a3\u4e48\uff0c\u6bcf\u79d2\u7684\u7b26\u53f7\u6570\uff08\u6ce2\u7279\u7387\uff09\u5c31\u7b49\u4e8e\u6bcf\u79d2\u7684\u6bd4\u7279\u6570\uff08\u6bd4\u7279\u7387\uff0cbit\/s\uff09\u3002\u5bf9\u4e8e\u56db\u8fdb\u5236\u4fe1\u53f7\uff0c1\u4e2a\u7b26\u53f7\u53ef\u4ee5\u8868\u8fbe2\u6bd4\u7279\uff0c\u6bcf\u79d2\u7684\u7b26\u53f7\u6570\u00d72=\u6bcf\u79d2\u7684\u6bd4\u7279\u6570\u3002<\/span><\/p>\n

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\u56db\u8fdb\u5236\uff0c\u76f8\u540c\u7684\u6ce2\u7279\u7387\uff0c\u6bd4\u7279\u7387\u7ffb\u500d\uff08\u4fe1\u606f\u91cf\u7ffb\u500d\uff09<\/span><\/p>\n

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\u6240\u4ee5\u8bf4\uff0c\u4e3a\u4e86\u63d0\u5347\u6bcf\u79d2\u7684\u6bd4\u7279\u6570\uff08\u4fe1\u606f\u4f20\u8f93\u901f\u7387\uff09\uff0c\u6211\u4eec\u9700\u8981\u4e00\u4e2a\u7b26\u53f7\u80fd\u5c3d\u91cf\u8868\u8fbe\u66f4\u591a\u7684\u6bd4\u7279\u3002\u600e\u4e48\u505a\u5230\u5462\uff1f\u6211\u4eec\u5f85\u4f1a\u518d\u8bf4\u3002<\/span><\/p>\n

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\u7b2c\u4e8c\u4e2a\u601d\u8def\uff1a\u91c7\u7528\u66f4\u591a\u7684\u5149\u7ea4\u6570\u6216\u901a\u9053\u6570\u3002<\/span><\/strong><\/p>\n

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\u7528\u66f4\u591a\u7684\u5149\u7ea4\uff0c\u8fd9\u4e2a\u601d\u8def\u5f88\u5bb9\u6613\u7c97\u66b4\u3002\u5149\u7ea4\u6570\u91cf\u8d8a\u591a\uff0c\u76f8\u5f53\u4e8e\u5355\u8f66\u9053\u53d8\u53cc\u8f66\u9053\u3001\u56db\u8f66\u9053\u3001\u516b\u8f66\u9053\uff0c\u5f53\u7136\u4f20\u8f93\u4fe1\u606f\u91cf\u4f1a\u7ffb\u500d\u3002<\/span><\/p>\n

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\u4f46\u662f\uff0c\u8fd9\u79cd\u65b9\u5f0f\u6d89\u53ca\u5230\u6295\u8d44\u6210\u672c\u3002\u800c\u4e14\uff0c\u5149\u7ea4\u6570\u592a\u591a\uff0c\u5b89\u88c5\u4e5f\u4f1a\u5f88\u9ebb\u70e6\u3002
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\u5728\u4e00\u6839\u5149\u7ea4\u91cc\uff0c\u5efa\u7acb\u591a\u4e2a\u4fe1\u9053\uff0c\u8fd9\u662f\u4e2a\u66f4\u597d\u7684\u529e\u6cd5\u3002<\/span><\/p>\n


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\u4fe1\u9053\u6570\u53ef\u4ee5\u662f\u7a7a\u95f4\u4fe1\u9053\uff0c\u4e5f\u53ef\u4ee5\u662f\u9891\u7387\u4fe1\u9053\u3002<\/span><\/p>\n


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\u7a7a\u95f4\u4fe1\u9053\u5305\u62ec\u6a21\u5f0f\uff08\u5355\u6a21\/\u591a\u6a21\uff09\u3001\u7ea4\u82af\uff08\u591a\u7ea4\u82af\u7684\u5149\u7ea4\uff09\u3001\u504f\u632f\uff08\u5f85\u4f1a\u4f1a\u8bb2\uff09\u3002<\/span><\/p>\n

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\u9891\u7387\u4fe1\u9053\u7684\u8bdd\uff0c\u8fd9\u5c31\u8981\u63d0\u5230WDM\uff08\u6ce2\u5206\u590d\u7528\u6280\u672f\uff09\u3002\u5b83\u628a\u4e0d\u540c\u7684\u4e1a\u52a1\u6570\u636e\uff0c\u653e\u5728\u4e0d\u540c\u6ce2\u957f\u7684\u5149\u8f7d\u6ce2\u4fe1\u53f7\u4e2d\uff0c\u5728\u4e00\u6839\u5149\u7ea4\u4e2d\u4f20\u9001\u3002<\/span><\/p>\n

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WDM\u6ce2\u5206\u590d\u7528<\/span><\/p>\n

\u6ce2\u957f\u00d7\u9891\u7387=\u5149\u901f\uff08\u6052\u5b9a\u503c\uff09\uff0c\u6240\u4ee5\u6ce2\u5206\u590d\u7528\u5176\u5b9e\u5c31\u662f\u9891\u5206\u590d\u7528<\/span><\/p>\n

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WDM\u540c\u6837\u4e5f\u4e0d\u662f\u65e0\u9650\u6ce2\u6570\u7684\u3002\u6bcf\u4e2a\u6ce2\u957f\u90fd\u5fc5\u987b\u5728\u6307\u5b9a\u7684\u6ce2\u957f\u8303\u56f4\u5185\uff0c\u800c\u4e14\u76f8\u4e92\u4e4b\u95f4\u8fd8\u8981\u6709\u4fdd\u62a4\u95f4\u9694\uff0c\u4e0d\u7136\u5bb9\u6613\u201c\u649e\u8f66\u201d\u3002<\/span><\/p>\n

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\u7b2c\u4e09\u4e2a\u601d\u8def\uff0c\u4e5f\u662f\u6211\u4eec\u4eca\u5929\u8981\u91cd\u70b9\u4ecb\u7ecd\u7684\u601d\u8def\u2014\u2014<\/span><\/strong>\u9ad8\u9636\u8c03\u5236<\/span><\/strong><\/span>\u3002<\/span><\/strong><\/p>\n

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\u4e5f\u5c31\u662f\u8bf4\uff0c\u91c7\u7528\u66f4\u9ad8\u7ea7\u7684\u8c03\u5236\u6280\u672f\uff0c\u63d0\u5347\u5355\u4e2a\u7b26\u53f7\u6240\u80fd\u4ee3\u8868\u7684\u6bd4\u7279\uff08\u5bf9\u5e94\u7b2c\u4e00\u4e2a\u601d\u8def\uff09\uff0c\u8fdb\u800c\u63d0\u5347\u6bd4\u7279\u7387\u3002<\/span><\/p>\n


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\u5bf9\u4e8e\u8c03\u5236\uff0c\u5927\u5bb6\u4e00\u5b9a\u4e0d\u4f1a\u964c\u751f\u3002\u6211\u4eec\u7ecf\u5e38\u542c\u8bf4\u7684PAM4\u3001BPSK\u3001QPSK\u300116QAM\u300164QAM\uff0c\u90fd\u662f\u8c03\u5236\u6280\u672f\u3002
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\u4ee5\u524d\u6211\u7ed9\u5927\u5bb6\u8bb2\u7535\u901a\u4fe1\u548c\u79fb\u52a8\u901a\u4fe1\u7684\u65f6\u5019\uff0c\u63d0\u5230\u8fc7\uff1a\u60f3\u8ba9\u7535\u78c1\u6ce2\u7b26\u53f7\u8868\u8fbe\u4e0d\u540c\u7684\u4fe1\u606f\uff0c\u65e0\u975e\u5c31\u662f\u5bf9\u7535\u78c1\u6ce2\u7684\u51e0\u4e2a\u7269\u7406\u7ef4\u5ea6\u8fdb\u884c\u8c03\u6574\u3002<\/span><\/p>\n


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\u5927\u5bb6\u6bd4\u8f83\u719f\u6089\u7684\u7269\u7406\u7ef4\u5ea6\uff0c\u662f\u5e45\u5ea6\u3001\u9891\u7387\u3001\u76f8\u4f4d\u3002<\/span><\/p>\n

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\u5149\u6ce2\u4e5f\u662f\u7535\u78c1\u6ce2\uff0c\u6240\u4ee5\uff0c\u5bf9\u5149\u6ce2\u8fdb\u884c\u8c03\u5236\uff0c\u601d\u8def\u57fa\u672c\u662f\u4e00\u6837\u7684\u3002<\/span><\/p>\n


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\u5149\u7ea4\u901a\u4fe1\u7cfb\u7edf\uff0c\u4e3b\u8981\u67096\u4e2a\u7269\u7406\u7ef4\u5ea6\u53ef\u4f9b\u590d\u7528\uff0c\u5373\uff1a\u9891\u7387\uff08\u6ce2\u957f\uff09\u3001\u5e45\u5ea6\u3001\u76f8\u4f4d\u3001\u65f6\u95f4\uff08OTDM\uff09\u3001\u7a7a\u95f4\uff08\u7a7a\u5206\u590d\u7528\uff09\u3001\u504f\u632f\uff08PDM\uff09\u3002<\/span><\/p>\n

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\u2588 <\/strong><\/span>\u5e45\u5ea6\u8c03\u5236<\/strong><\/section>\n

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\u9891\u7387\u590d\u7528\u5176\u5b9e\u5c31\u662fWDM\u6ce2\u5206\u590d\u7528\uff0c\u521a\u624d\u5df2\u7ecf\u4ecb\u7ecd\u8fc7\u4e86\u3002\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u770b\u770b\u5e45\u5ea6\u8c03\u5236<\/strong>\u3002<\/span><\/p>\n


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\u5728\u65e9\u671f\u7684\u5149\u901a\u4fe1\u7cfb\u7edf\u91cc\uff0c\u6211\u4eec\u91c7\u7528\u7684\u662f\u76f4\u63a5\u8c03\u5236<\/strong>\uff08DML\uff0cDirect Modulation Laser\uff09\u3002\u5b83\u5c31\u5c5e\u4e8e\u5f3a\u5ea6\uff08\u5e45\u5ea6\uff09\u8c03\u5236\u3002<\/span><\/p>\n


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\u5728\u76f4\u63a5\u8c03\u5236\u4e2d\uff0c\u7535\u4fe1\u53f7\u76f4\u63a5\u7528\u5f00\u5173\u952e\u63a7\uff08OOK\uff0cOn-Off Keying\uff09\u65b9\u5f0f\uff0c\u8c03\u5236\u6fc0\u5149\u5668\u7684\u5f3a\u5ea6\uff08\u5e45\u5ea6\uff09\u3002<\/span><\/p>\n

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\u8fd9\u4e2a\u548c\u6211\u4eec\u7684\u822a\u6d77\u4fe1\u53f7\u706f\u6709\u70b9\u50cf\u3002\u4eae\u7684\u65f6\u5019\u662f1\uff0c\u6697\u7684\u65f6\u5019\u662f0\uff0c\u4e00\u4e2a\u7b26\u53f7\u4e00\u4e2a\u6bd4\u7279\uff0c\u7b80\u5355\u660e\u4e86\u3002<\/span><\/p>\n

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\u76f4\u63a5\u8c03\u5236\u7684\u4f18\u70b9\u662f\u91c7\u7528\u5355\u4e00\u5668\u4ef6\uff0c\u6210\u672c\u4f4e\u5ec9\uff0c\u9644\u4ef6\u635f\u8017\u5c0f\u3002\u4f46\u662f\uff0c\u5b83\u7684\u7f3a\u70b9\u4e5f\u5f88\u591a\u3002\u5b83\u7684\u8c03\u5236\u9891\u7387\u53d7\u9650\uff08\u4e0e\u6fc0\u5149\u5668\u9a70\u8c6b\u632f\u8361\u6709\u5173\uff09\uff0c\u4f1a\u4ea7\u751f\u5f3a\u7684\u9891\u7387\u5541\u557e\uff0c\u9650\u5236\u4f20\u8f93\u8ddd\u79bb\u3002\u76f4\u63a5\u8c03\u5236\u6fc0\u5149\u5668\u53ef\u80fd\u51fa\u73b0\u7684\u7ebf\u6027\u8c03\u9891\uff0c\u4f7f\u8f93\u51fa\u7ebf\u5bbd\u589e\u5927\uff0c\u8272\u6563\u5f15\u5165\u8109\u51b2\u5c55\u5bbd\uff0c\u4f7f\u4fe1\u9053\u80fd\u91cf\u635f\u5931\uff0c\u5e76\u4ea7\u751f\u5bf9\u90bb\u8fd1\u4fe1\u9053\u7684\u4e32\u6270\uff08\u770b\u4e0d\u61c2\u5c31\u8df3\u8fc7\u5427\uff09\u3002<\/span><\/p>\n


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\u6240\u4ee5\uff0c\u540e\u6765\u51fa\u73b0\u4e86<\/span>\u5916\u8c03\u5236<\/strong>\uff08EML\uff0cExternal Modulation Laser\uff09\u3002<\/span><\/p>\n

<\/p>\n

\u5728\u5916\u8c03\u5236\u4e2d\uff0c\u8c03\u5236\u5668\u4f5c\u7528\u4e8e\u6fc0\u5149\u5668\u5916\u7684\u8c03\u5236\u5668\u4e0a\uff0c\u501f\u52a9\u7535\u5149\u3001\u70ed\u5149\u6216\u58f0\u5149\u7b49\u7269\u7406\u6548\u5e94\uff0c\u4f7f\u6fc0\u5149\u5668\u53d1\u5c04\u7684\u6fc0\u5149\u675f\u7684\u5149\u53c2\u91cf\u53d1\u751f\u53d8\u5316\uff0c\u4ece\u800c\u5b9e\u73b0\u8c03\u5236\u3002<\/span><\/p>\n

<\/p>\n

\u5982\u4e0b\u56fe\u6240\u793a\uff1a<\/span><\/p>\n


<\/span><\/p>\n

<\/section>\n

<\/p>\n

\u5916\u8c03\u5236\u5e38\u7528\u7684\u65b9\u5f0f\u6709\u4e24\u79cd\u3002<\/span><\/p>\n


<\/span><\/p>\n

<\/section>\n

<\/p>\n

\u4e00\u79cd\u662fEA\u7535\u5438\u6536\u8c03\u5236<\/strong>\u3002\u5c06\u8c03\u5236\u5668\u4e0e\u6fc0\u5149\u5668\u96c6\u6210\u5230\u4e00\u8d77\uff0c\u6fc0\u5149\u5668\u6052\u5b9a\u5149\u5f3a\u7684\u5149\uff0c\u9001\u5230EA\u8c03\u5236\u5668\uff0cEA\u8c03\u5236\u5668\u7b49\u540c\u4e8e\u4e00\u4e2a\u95e8\uff0c\u95e8\u5f00\u7684\u5927\u5c0f\u7531\u7535\u538b\u63a7\u5236\u3002\u901a\u8fc7\u6539\u53d8\u7535\u573a\u7684\u5927\u5c0f\uff0c\u53ef\u4ee5\u8c03\u6574\u5bf9\u5149\u4fe1\u53f7\u7684\u5438\u6536\u7387\uff0c\u8fdb\u800c\u5b9e\u73b0\u8c03\u5236\u3002<\/span><\/p>\n


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<\/section>\n

<\/p>\n

\u8fd8\u6709\u4e00\u79cd\uff0c\u662fMZ\u8c03\u5236\u5668\uff0c\u4e5f\u5c31\u662fMach-Zehnder\u9a6c\u8d6b-\u66fe\u5fb7\u5c14\u8c03\u5236\u5668<\/strong>\u3002<\/span><\/p>\n

<\/p>\n

\u5728MZ\u8c03\u5236\u5668\u4e2d\uff0c\u8f93\u5165\u7684\u6fc0\u5149\u88ab\u5206\u6210\u4e24\u8def\u3002\u901a\u8fc7\u6539\u53d8\u65bd\u52a0\u5728MZ\u8c03\u5236\u5668\u4e0a\u7684\u504f\u7f6e\u7535\u538b\uff0c\u4e24\u8def\u5149\u4e4b\u95f4\u7684\u76f8\u4f4d\u5dee\u53d1\u751f\u53d8\u5316\uff0c\u518d\u5728\u8c03\u5236\u5668\u8f93\u51fa\u7aef\u53e0\u52a0\u5728\u4e00\u8d77\u3002<\/span><\/p>\n


<\/span><\/p>\n

<\/section>\n

<\/p>\n

\u7535\u538b\u662f\u5982\u4f55\u4ea7\u751f\u76f8\u4f4d\u5dee\u7684\u5462\uff1f<\/span><\/p>\n


<\/span><\/p>\n

\u57fa\u4e8e\u7535\u5149\u6548\u5e94\u2014\u2014\u67d0\u4e9b\u6676\u4f53(\u5982\u94cc\u9178\u9502)\u7684\u6298\u5c04\u7387n\uff0c\u4f1a\u968f\u7740\u5c40\u90e8\u7535\u573a\u5f3a\u5ea6\u53d8\u5316\u800c\u53d8\u5316\u3002<\/span><\/p>\n


<\/span><\/p>\n

\u5982\u4e0b\u56fe\u6240\u793a\uff0c\u53cc\u81c2\u5c31\u662f\u53cc\u8def\u5f84\uff0c\u4e00\u4e2a\u662fModulated path\uff08\u8c03\u5236\u8def\u5f84\uff09\uff0c\u4e00\u4e2a\u662fUnmodulated path\uff08\u975e\u8c03\u5236\u8def\u5f84\uff09\u3002<\/span><\/p>\n


<\/span><\/p>\n

<\/section>\n

<\/p>\n

\u5f53\u4f5c\u7528\u5728\u8c03\u5236\u8def\u5f84\u4e0a\u7684\u7535\u538b\u53d8\u5316\u65f6\uff0c\u8fd9\u4e2a\u81c2\u4e0a\u7684\u6298\u5c04\u7387n\u53d1\u751f\u4e86\u53d8\u5316\u3002\u5149\u5728\u4ecb\u8d28\u4e2d\u7684\u4f20\u64ad\u901f\u7387v=c\/n\uff08\u5149\u5728\u771f\u7a7a\u4e2d\u7684\u901f\u7387\u9664\u4ee5\u6298\u5c04\u7387\uff09\uff0c\u6240\u4ee5\uff0c\u5149\u4f20\u64ad\u7684\u901f\u7387v\u53d1\u751f\u53d8\u5316\u3002
<\/span><\/p>\n

<\/p>\n

\u4e24\u6761\u8def\u5f84\u957f\u5ea6\u662f\u4e00\u6837\u7684\uff0c\u6709\u4eba\u5148\u5230\uff0c\u6709\u4eba\u540e\u5230\uff0c\u6240\u4ee5\uff0c\u5c31\u51fa\u73b0\u4e86\u76f8\u4f4d\u7684\u5dee\u5f02\u3002<\/span><\/p>\n

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<\/section>\n

<\/p>\n

\u5982\u679c\u4e24\u8def\u5149\u7684\u76f8\u4f4d\u5dee\u662f0\u5ea6\uff0c\u90a3\u4e48\u76f8\u52a0\u4ee5\u540e\uff0c\u632f\u5e45\u5c31\u662f1+1=2\u3002<\/span><\/p>\n

<\/p>\n

\u5982\u679c\u4e24\u8def\u5149\u7684\u76f8\u4f4d\u5dee\u662f90\u5ea6\uff0c\u90a3\u4e48\u76f8\u52a0\u4ee5\u540e\uff0c\u632f\u5e45\u5c31\u662f2\u7684\u5e73\u65b9\u6839\u3002<\/span><\/p>\n

<\/p>\n

\u5982\u679c\u4e24\u8def\u5149\u7684\u76f8\u4f4d\u5dee\u662f180\u5ea6\uff0c\u90a3\u4e48\u76f8\u52a0\u4ee5\u540e\uff0c\u632f\u5e45\u5c31\u662f1-1=0\u3002<\/span><\/p>\n

<\/p>\n

<\/p>\n

<\/p>\n

\u5927\u5bb6\u5e94\u8be5\u4e5f\u60f3\u5230\u4e86\uff0c\u5176\u5b9eMZ\u8c03\u5236\u5668\u5c31\u662f\u57fa\u4e8e\u53cc\u7f1d\u5e72\u6d89\u5b9e\u9a8c\uff0c\u548c\u6c34\u6ce2\u5e72\u6d89\u539f\u7406\u4e00\u6837\u7684\u3002
<\/span><\/p>\n

<\/p>\n

<\/section>\n
\u5cf0\u5cf0\u53e0\u52a0\uff0c\u5cf0\u8c37\u62b5\u6d88<\/span><\/section>\n

<\/p>\n

\u2588 <\/span><\/strong>\u5149\u76f8\u4f4d<\/span><\/strong><\/span>\u8c03\u5236<\/span><\/strong><\/section>\n


<\/span><\/p>\n

\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u8bb2\u8bb2\u5149\u76f8\u4f4d\u8c03\u5236\u3002\uff08\u6572\u9ed1\u677f\uff0c\u8fd9\u90e8\u5206\u53ef\u662f\u91cd\u70b9\uff01\uff09
<\/span><\/p>\n

<\/p>\n

\u5176\u5b9e\u521a\u624d\u6211\u4eec\u5df2\u7ecf\u8bb2\u5230\u4e86\u76f8\u4f4d\uff0c\u4e0d\u8fc7\u90a3\u4e2a\u662f\u501f\u52a9\u76f8\u4f4d\u5dee\u4ea7\u751f\u5e45\u5ea6\u5dee\uff0c\u4f9d\u65e7\u5c5e\u4e8e\u5e45\u5ea6\u8c03\u5236\u3002<\/span><\/p>\n


<\/span><\/p>\n

\u9996\u5148\uff0c\u6211\u4eec\u56de\u5fc6\u4e00\u4e0b\u9ad8\u4e2d\uff08\u521d\u4e2d\uff1f\uff09\u7684\u6570\u5b66\u77e5\u8bc6\u2014\u2014\u865a\u6570\u548c\u4e09\u89d2\u51fd\u6570\u3002<\/span><\/p>\n

<\/p>\n

\u5728\u6570\u5b66\u4e2d\uff0c\u865a\u6570\u5c31\u662f\u5f62\u5982a+b*i<\/strong>\u7684\u6570\u3002\u5b9e\u90e8a\u53ef\u5bf9\u5e94\u5e73\u9762\u4e0a\u7684\u6a2a\u8f74\uff0c\u865a\u90e8b\u4e0e\u5bf9\u5e94\u5e73\u9762\u4e0a\u7684\u7eb5\u8f74\uff0c\u8fd9\u6837\u865a\u6570a+b*i\u53ef\u4e0e\u5e73\u9762\u5185\u7684\u70b9(a,b)\u5bf9\u5e94\u3002<\/span><\/p>\n


<\/span><\/p>\n

<\/p>\n

<\/p>\n

\u5927\u5bb6\u5e94\u8be5\u8fd8\u8bb0\u5f97\uff0c\u5750\u6807\u8f74\u5176\u5b9e\u662f\u53ef\u4ee5\u548c\u6ce2\u5f62\u76f8\u5bf9\u5e94\u7684\uff0c\u5982\u4e0b\uff1a<\/span><\/p>\n


<\/span><\/p>\n

<\/section>\n


\u6ce2\u5f62\uff0c\u5176\u5b9e\u53c8\u53ef\u4ee5\u7528\u4e09\u89d2\u51fd\u6570\u6765\u8868\u793a\uff0c\u4f8b\u5982\uff1a<\/span><\/p>\n


<\/span><\/p>\n

<\/section>\n
\u591a\u4e48\u4f18\u7f8e\uff0c\u591a\u4e48\u5996\u5a06~<\/span><\/section>\n
X = A * sin\uff08\u03c9t+\u03c6\uff09= A * sin\u03b8<\/span><\/span><\/span><\/section>\n
Y = A * cos\uff08\u03c9t+\u03c6<\/span>\uff09= A * cos<\/span>\u03b8<\/span><\/span><\/section>\n
\u03c9<\/span>\u662f\u89d2\u901f\u5ea6\uff0c\u03c9<\/span>=2\u03c0f\uff0cf\u662f\u9891\u7387\u3002<\/span><\/section>\n
\u03c6<\/span>\u662f\u521d\u76f8\u4f4d\uff0c\u4e0a\u56fe\u4e3a0\u00b0\u3002<\/span><\/section>\n

<\/p>\n

\u8fd8\u8bb0\u5f97\u4e0d\uff1f\u628aA\u770b\u51fa\u5e45\u5ea6\uff0c\u628a\u03b8\u770b\u6210\u76f8\u4f4d\uff0c\u5c31\u662f\u7535\u78c1\u6ce2\u7684\u6ce2\u5f62\u3002<\/span><\/p>\n


<\/span><\/p>\n

\u03b8<\/span>=0\u00b0\uff0csin\u03b8<\/span>=0<\/span><\/p>\n

\u03b8=90\u00b0\uff0csin\u03b8=1<\/span><\/p>\n

\u03b8=180\u00b0\uff0csin\u03b8=0<\/span><\/p>\n

\u03b8=270\u00b0\uff0csin\u03b8=-1<\/span><\/p>\n

<\/p>\n

\u597d\u4e86\uff0c\u57fa\u7840\u77e5\u8bc6\u590d\u4e60\u5b8c\u6bd5\uff0c\u73b0\u5728\u8fdb\u5165\u6b63\u6587\u3002<\/span><\/p>\n


<\/span><\/p>\n

\u9996\u5148\uff0c\u6211\u4eec\u4ecb\u7ecd\u4e00\u4e0b\uff0c\u661f\u5ea7\u56fe<\/strong>\u3002<\/span><\/p>\n

<\/p>\n

\u5176\u5b9e\u521a\u624d\u4ecb\u7ecdMZ\u8c03\u5236\u5668\u76f8\u4f4d\u53d8\u5316\u7684\u65f6\u5019\uff0c\u5df2\u7ecf\u770b\u5230\u4e86\u661f\u5ea7\u56fe\u7684\u5f71\u5b50\u3002\u4e0b\u9762\u8fd9\u51e0\u5f20\u56fe\u56fe\uff0c\u90fd\u5c5e\u4e8e\u661f\u5ea7\u56fe\u3002\u56fe\u4e2d\u7684\u9ed1\u8272\u5c0f\u70b9\uff0c\u5c31\u662f\u661f\u5ea7\u70b9\u3002<\/span><\/p>\n


<\/span><\/p>\n

<\/section>\n

<\/p>\n

\u5927\u5bb6\u4f1a\u53d1\u73b0\uff0c\u661f\u5ea7\u56fe\u548c\u6211\u4eec\u975e\u5e38\u719f\u6089\u7684\u7eb5\u6a2a\u5750\u6807\u7cfb\u5f88\u50cf\u3002\u662f\u7684\uff0c\u661f\u5ea7\u56fe\u91cc\u7684\u661f\u5ea7\u70b9\uff0c\u5176\u5b9e\u5c31\u662f\u632f\u5e45E\u548c\u76f8\u4f4d\u0424\u7684\u4e00\u5bf9\u7ec4\u5408\u3002
<\/span><\/p>\n


<\/span><\/p>\n

<\/p>\n

<\/p>\n

\u5c31\u8981\u63d0\u51fa I\/Q\u8c03\u5236<\/strong>\uff08\u4e0d\u662f\u667a\u5546\u8c03\u5236\u554a\uff09\u3002<\/span><\/p>\n

<\/p>\n

I\uff0c\u4e3ain-phase\uff0c\u540c\u76f8\u6216\u5b9e\u90e8\u3002Q\uff0c\u4e3aquadrature phase\uff0c\u6b63\u4ea4\u76f8\u4f4d\u6216\u865a\u90e8\u3002\u6240\u8c13\u6b63\u4ea4\uff0c\u5c31\u662f\u76f8\u5bf9\u53c2\u8003\u4fe1\u53f7\u76f8\u4f4d\u6709-90\u5ea6\u5dee\u7684\u8f7d\u6ce2\u3002<\/span><\/p>\n


<\/span><\/p>\n

<\/p>\n

<\/p>\n

\u6211\u4eec\u7ee7\u7eed\u6765\u770b\u3002<\/span><\/p>\n


<\/span><\/p>\n

\u5728\u661f\u5ea7\u56fe\u4e0a\uff0c\u5982\u679c\u5e45\u5ea6\u4e0d\u53d8\uff0c\u7528\u4e24\u4e2a\u4e0d\u540c\u7684\u76f8\u4f4d0\u548c180\u00b0\uff0c\u8868\u793a1\u548c0\uff0c\u53ef\u4ee5\u4f20\u90122\u79cd\u7b26\u53f7\uff0c\u5c31\u662fBPSK<\/strong>\uff08Binary Phase Shift Keying\uff0c\u4e8c\u8fdb\u5236\u76f8\u79fb\u952e\u63a7\uff09\u3002<\/span><\/p>\n


<\/span><\/p>\n

<\/p>\n

BPSK<\/span><\/p>\n


<\/span><\/p>\n

BPSK\u662f\u6700\u7b80\u5355\u6700\u57fa\u7840\u7684PSK\uff0c\u975e\u5e38\u7a33\uff0c\u4e0d\u5bb9\u6613\u51fa\u9519\uff0c\u6297\u5e72\u6270\u80fd\u529b\u5f3a\u3002\u4f46\u662f\uff0c\u5b83\u4e00\u4e2a\u7b26\u53f7\u53ea\u80fd\u4f20\u90011\u4e2a\u6bd4\u7279\uff0c\u6548\u7387\u592a\u4f4e\u3002<\/span><\/p>\n


<\/span><\/p>\n

\u4e8e\u662f\uff0c\u6211\u4eec\u5347\u7ea7\u4e00\u4e0b\uff0c\u641e\u4e2aQPSK<\/strong>\uff08Quadrature PSK\uff0c\u6b63\u4ea4\u76f8\u79fb\u952e\u63a7\uff09\u3002<\/span><\/p>\n

<\/p>\n

QPSK\uff0c\u662f\u5177\u67094\u4e2a\u7535\u5e73\u503c\u7684\u56db\u8fdb\u5236\u76f8\u79fb\u952e\u63a7\uff08PSK\uff09\u8c03\u5236\u3002\u5b83\u7684\u9891\u5e26\u5229\u7528\u7387\uff0c\u662fBPSK\u76842\u500d\u3002<\/span><\/p>\n


<\/span><\/p>\n

<\/span><\/section>\n
\u56fe\u7247\u6765\u81ea\u662f\u5fb7\u79d1\u6280<\/span><\/section>\n

<\/p>\n

\u968f\u7740\u8fdb\u5236\u7684\u589e\u52a0\uff0c\u867d\u7136\u9891\u5e26\u5229\u7528\u7387\u63d0\u9ad8\uff0c\u4f46\u4e5f\u5e26\u6765\u4e86\u7f3a\u70b9\u2014\u2014\u5404\u7801\u5143\u4e4b\u95f4\u7684\u8ddd\u79bb\u51cf\u5c0f\uff0c\u4e0d\u5229\u4e8e\u4fe1\u53f7\u7684\u6062\u590d\u3002\u7279\u522b\u662f\u53d7\u5230\u566a\u58f0\u548c\u5e72\u6270\u65f6\uff0c\u8bef\u7801\u7387\u4f1a\u968f\u4e4b\u589e\u5927\u3002<\/span><\/p>\n

<\/p>\n

\u4e3a\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\uff0c\u6211\u4eec\u4e0d\u5f97\u4e0d\u63d0\u9ad8\u4fe1\u53f7\u529f\u7387\uff08\u5373\u63d0\u9ad8\u4fe1\u53f7\u7684\u4fe1\u566a\u6bd4\uff0c\u6765\u907f\u514d\u8bef\u7801\u7387\u7684\u589e\u5927\uff09\uff0c\u8fd9\u5c31\u4f7f\u529f\u7387\u5229\u7528\u7387\u964d\u4f4e\u4e86\u3002<\/span><\/p>\n

<\/p>\n

\u6709\u6ca1\u6709\u529e\u6cd5\uff0c\u53ef\u4ee5\u517c\u987e\u9891\u5e26\u5229\u7528\u7387\u548c\u5404\u7801\u5143\u4e4b\u95f4\u7684\u8ddd\u79bb\u5462\uff1f<\/span><\/p>\n

<\/p>\n

\u6709\u7684\uff0c\u8fd9\u5c31\u5f15\u5165\u4e86QAM<\/strong>\uff08Quadrature Amplitude Modulation\uff0c\u6b63\u4ea4\u5e45\u5ea6\u8c03\u5236\uff09\u3002<\/span><\/p>\n

<\/p>\n

QAM\u7684\u7279\u70b9\uff0c\u662f\u5404\u7801\u5143\u4e4b\u95f4\u4e0d\u4ec5\u76f8\u4f4d\u4e0d\u540c\uff0c\u5e45\u5ea6\u4e5f\u4e0d\u540c\u3002\u5b83\u5c5e\u4e8e\u76f8\u4f4d\u4e0e\u5e45\u5ea6\u76f8\u7ed3\u5408\u7684\u8c03\u5236\u65b9\u5f0f\u3002<\/span><\/p>\n

<\/p>\n

\u5927\u5bb6\u770b\u4e0b\u9762\u8fd9\u5f20\u52a8\u56fe\uff0c\u5c31\u660e\u767d\u4e86\uff1a<\/span><\/p>\n


<\/span><\/p>\n

<\/p>\n

Amp\uff0c\u632f\u5e45\u3002Phase\uff0c\u76f8\u4f4d\u3002<\/span><\/p>\n

<\/p>\n

\u5176\u5b9e\uff0cQPSK\u5c31\u662f\u7535\u5e73\u6570\u4e3a4\u7684QAM\u3002\u4e0a\u56fe\u662f16QAM\uff0c16\u4e2a\u7b26\u53f7\uff0c\u6bcf\u4e2a\u7b26\u53f74bit\uff080000\uff0c0001\uff0c0010\u7b49\uff09\u3002<\/span><\/p>\n


<\/span><\/p>\n

64QAM\u7684\u8bdd\uff0c64\u4e2a\u7b26\u53f7\uff082\u7684n\u6b21\u65b9\uff0cn=6\uff09\uff0c\u6bcf\u4e2a\u7b26\u53f76bit\uff08000000\uff0c000001\uff0c000010\u7b49\uff09\u3002
<\/span><\/p>\n


<\/span><\/p>\n

<\/span><\/p>\n

<\/p>\n

QPSK\u8fd9\u79cd\u8c03\u5236\uff0c\u5230\u5e95\u662f\u600e\u4e48\u6363\u9f13\u51fa\u6765\u7684\u5462\uff1f<\/span><\/p>\n


<\/span><\/p>\n

\u6211\u4eec\u53ef\u4ee5\u770b\u4e00\u4e2a\u901a\u8fc7MZ\u8c03\u5236\u5668\u6363\u9f13QPSK\u7684\u56fe\u7247\uff1a<\/span><\/p>\n


<\/span><\/p>\n

<\/span><\/p>\n

\u56fe\u7247\u6765\u81ea\u662f\u5fb7\u79d1\u6280<\/span><\/p>\n


<\/span><\/p>\n

\u5728\u53d1\u5c04\u673a\u4e2d\uff0c\u7535\u6bd4\u7279\u6d41\u88ab\u4e00\u4e2a\u591a\u8def\u590d\u7528\u5668\u5206\u6210\u4fe1\u53f7\u7684I\u548cQ\u90e8\u5206\u3002\u8fd9\u4e24\u90e8\u5206\u4e2d\u7684\u6bcf\u4e00\u90e8\u5206\u90fd\u76f4\u63a5\u8c03\u5236MZ\u8c03\u5236\u5668\u4e00\u53ea\u81c2\u4e0a\u7684\u6fc0\u5149\u4fe1\u53f7\u7684\u76f8\u4f4d\u3002\u53e6\u4e00\u4e2aMZ\u8c03\u5236\u5668\u628a\u8f83\u4f4e\u7684\u5206\u652f\u76f8\u79fb\u03c0?2\u3002\u4e24\u4e2a\u5206\u652f\u91cd\u7ec4\u540e\uff0c\u7ed3\u679c\u662f\u4e00\u4e2aQPSK\u4fe1\u53f7\u3002<\/span><\/p>\n


<\/span><\/p>\n

\u9ad8\u9636QAM\u7684\u8c03\u5236\u96be\u5ea6\u66f4\u5927\u3002\u9650\u4e8e\u7bc7\u5e45\uff0c\u4e0b\u6b21\u6211\u518d\u4e13\u95e8\u7ed9\u5927\u5bb6\u89e3\u91ca\u3002<\/span><\/p>\n


<\/span><\/p>\n

\u6b64\u524d\u4ecb\u7ecd\u65e0\u7ebf\u901a\u4fe1\u8c03\u5236\u7684\u65f6\u5019\uff0c\u8bf4\u8fc75G\u548cWi-Fi 6\u90fd\u5728\u51b21024QAM\u3002\u90a3\u4e48\uff0c\u5149\u901a\u4fe1\u662f\u4e0d\u662f\u53ef\u4ee5\u641e\u90a3\u4e48\u9ad8\u9636\u7684QAM\u5462\uff1f<\/span><\/p>\n


<\/span><\/p>\n

\u4e0d\u7792\u60a8\u8bf4\uff0c\u8fd8\u771f\u6709\u4eba\u8fd9\u4e48\u5e72\u4e86\u3002<\/span><\/p>\n


<\/span><\/p>\n

\u524d\u51e0\u5e74\uff0c\u5c31\u6709\u516c\u53f8\u5c55\u793a\u4e86\u57fa\u4e8e\u5148\u8fdb\u7684\u661f\u7cfb\u6574\u5f62\u7b97\u6cd5\u548c\u5948\u594e\u65af\u7279\u526f\u8f7d\u6ce2\u6280\u672f\u76841024QAM\u8c03\u5236\uff0c\u57fa\u4e8e66Gbaud\u6ce2\u7279\u7387\uff0c\u5b9e\u73b0\u4e861.32Tbps\u4e0b\u7684400\u516c\u91cc\u4f20\u8f93\uff0c\u9891\u8c31\u6548\u7387\u8fbe\u52309.35bit\/s\/Hz\u3002<\/span><\/p>\n


<\/span><\/p>\n

\u4e0d\u8fc7\uff0c\u8fd9\u79cd\u9ad8\u9636\u8c03\u5236\u4ecd\u5c5e\u4e8e\u5b9e\u9a8c\u5ba4\u9636\u6bb5\uff0c\u6ca1\u6709\u5546\u7528\uff08\u4e5f\u4e0d\u77e5\u9053\u6709\u6ca1\u6709\u53ef\u80fd\u5546\u7528\uff09<\/span>\u3002\u76ee\u524d\u5b9e\u9645\u5e94\u7528\u7684\uff0c\u597d\u50cf\u6ca1\u6709\u8d85\u8fc7256QAM\u3002<\/span><\/p>\n


<\/span><\/p>\n

\u9ad8\u9636QAM\u867d\u7136\u5e26\u6765\u4e86\u4f20\u8f93\u901f\u7387\u7684\u5927\u5e45\u63d0\u5347\uff0c\u4f46\u5bf9\u5143\u5668\u4ef6\u6027\u80fd\u8981\u6c42\u5f88\u9ad8\uff0c\u5bf9\u82af\u7247\u7b97\u529b\u7684\u8981\u6c42\u4e5f\u9ad8\u3002\u800c\u4e14\uff0c\u5982\u679c\u4fe1\u9053\u566a\u58f0\u6216\u5e72\u6270\u592a\u5927\uff0c\u8fd8\u662f\u4f1a\u51fa\u73b0\u521a\u624d\u6240\u8bf4\u7684\u9ad8\u8bef\u7801\u7387\u95ee\u9898\u3002
<\/span><\/p>\n


<\/span><\/p>\n

<\/p>\n

1024QAM\uff0c\u5bc6\u96c6\u6050\u60e7\u75c7\u7684\u8282\u594f<\/span><\/p>\n

<\/p>\n

\u5728\u76f8\u540c\u768430G+\u6ce2\u7279\u7387\u4e0b\uff0c16QAM\u7684\u5149\u4fe1\u566a\u6bd4\uff08OSNR\uff09\u6bd4QPSK\u9ad8\u51fa\u7ea65dB\u3002\u968f\u7740\u661f\u5ea7\u4e2d\u661f\u5ea7\u70b9\u4e2a\u6570\u7684\u589e\u52a0\uff0c16QAM\u7684OSNR\u5c06\u5448\u6307\u6570\u589e\u957f\u3002<\/span><\/p>\n


<\/span><\/p>\n

\u56e0\u6b64\uff0c16QAM\u6216\u66f4\u9ad8\u9636QAM\u7684\u4f20\u8f93\u8ddd\u79bb\u5c06\u88ab\u8fdb\u4e00\u6b65\u9650\u5236\u3002<\/span><\/p>\n


<\/span><\/p>\n

<\/section>\n

<\/p>\n

\u4e3a\u4e86\u8fdb\u4e00\u6b65\u69a8\u5e72\u5149\u7ea4\u901a\u4fe1\u7684\u5e26\u5bbd\u6f5c\u529b\uff0c\u5382\u5546\u4eec\u796d\u51fa\u4e86\u65b0\u7684\u5927\u6740\u5668\uff0c\u90a3\u5c31\u662f\u2014\u2014\u76f8\u5e72\u5149\u901a\u4fe1<\/strong>\u3002\u4e0b\u671f\uff0c\u5c0f\u67a3\u541b\u5c06\u8be6\u7ec6\u7ed9\u5927\u5bb6\u4ecb\u7ecd\u3002<\/span><\/p>\n

<\/p>\n

\u2588 <\/span><\/strong>PAM4\u548c\u504f\u632f\u590d\u7528<\/strong><\/span><\/strong><\/span><\/section>\n


<\/span><\/p>\n

\u6587\u7ae0\u7684\u6700\u540e\uff0c\u518d\u8bf4\u8bf4\u4e24\u4e2a\u201c\u7ffb\u500d\u201d\u6280\u672f\u2014\u2014PAM4\u548cPDM\u504f\u632f\u591a\u8def\u590d\u7528\u3002
<\/span><\/p>\n

<\/p>\n

\u5148\u8bf4PAM4\u3002<\/span><\/section>\n

<\/span><\/section>\n
\u5728PAM4\u4e4b\u524d\uff0c\u6211\u4eec\u4f20\u7edf\u4f7f\u7528\u7684\u90fd\u662fNRZ\u3002
<\/span><\/section>\n

<\/section>\n
NRZ\uff0c\u5c31\u662fNon-Return-to-Zero\u7684\u7f29\u5199\uff0c\u5b57\u9762\u610f\u601d\u53eb\u505a\u201c\u4e0d\u5f52\u96f6\u201d\uff0c\u4e5f\u5c31\u662f\u4e0d\u5f52\u96f6\u7f16\u7801\u3002<\/span><\/section>\n

<\/section>\n
\u91c7\u7528NRZ\u7f16\u7801\u7684\u4fe1\u53f7\uff0c\u5c31\u662f\u4f7f\u7528\u9ad8\u3001\u4f4e\u4e24\u79cd\u4fe1\u53f7\u7535\u5e73\u6765\u8868\u793a\u4f20\u8f93\u4fe1\u606f\u7684\u6570\u5b57\u903b\u8f91\u4fe1\u53f7\u3002<\/span><\/section>\n

<\/section>\n
NRZ\u6709\u5355\u6781\u6027\u4e0d\u5f52\u96f6\u7801\u548c\u53cc\u6781\u6027\u4e0d\u5f52\u96f6\u7801\u3002
<\/span><\/section>\n

<\/section>\n
\u5355\u6781\u6027\u4e0d\u5f52\u96f6\u7801\uff0c\u201c1\u201d\u548c\u201c0\u201d\u5206\u522b\u5bf9\u5e94\u6b63\u7535\u5e73\u548c\u96f6\u7535\u5e73\uff0c\u6216\u8d1f\u7535\u5e73\u548c\u96f6\u7535\u5e73\u3002<\/span><\/section>\n
<\/section>\n

<\/p>\n

\u5355\u6781\u6027\u4e0d\u5f52\u96f6\u7801<\/span><\/p>\n


<\/section>\n
\u53cc\u6781\u6027\u4e0d\u5f52\u96f6\u7801\uff0c\u201c1\u201d\u548c\u201c0\u201d\u5206\u522b\u5bf9\u5e94\u6b63\u7535\u5e73\u548c\u7b49\u6548\u8d1f\u7535\u5e73\u3002<\/span><\/section>\n

<\/section>\n

<\/p>\n

\u53cc\u6781\u6027\u4e0d\u5f52\u96f6\u7801<\/span><\/p>\n


<\/section>\n
\u6240\u8c13\u201c\u4e0d\u5f52\u96f6\u201d\uff0c\u4e0d\u662f\u8bf4\u6ca1\u6709\u201c0\u201d\uff0c\u800c\u662f\u8bf4\u6bcf\u4f20\u8f93\u5b8c\u4e00\u4f4d\u6570\u636e\uff0c\u4fe1\u53f7\u65e0\u9700\u8fd4\u56de\u5230\u96f6\u7535\u5e73\u3002\uff08\u663e\u7136\uff0c\u76f8\u6bd4RZ\uff0cNRZ\u8282\u7ea6\u4e86\u5e26\u5bbd\u3002\uff09<\/span><\/section>\n

<\/section>\n
\u5728\u5149\u6a21\u5757\u8c03\u5236\u91cc\u9762\uff0c\u6211\u4eec\u662f\u7528\u6fc0\u5149\u5668\u7684\u529f\u7387\u6765\u63a7\u52360\u548c1\u7684\u3002<\/span><\/section>\n

<\/section>\n
\u7b80\u5355\u6765\u8bf4\uff0c\u5c31\u662f\u53d1\u5149\uff0c\u5b9e\u9645\u53d1\u5c04\u5149\u529f\u7387\u5927\u4e8e\u67d0\u95e8\u9650\u503c\uff0c\u5c31\u662f1\u3002\u5c0f\u4e8e\u67d0\u95e8\u9650\u503c\uff0c\u5c31\u662f0\u3002<\/span><\/section>\n
<\/section>\n
\u4f20\u8f93011011\u5c31\u662f\u8fd9\u6837\uff1a<\/span><\/section>\n
<\/section>\n
<\/section>\n

NRZ\u8c03\u5236<\/span><\/p>\n


<\/p>\n

\u540e\u6765\uff0c\u6b63\u5982\u524d\u6587\u6240\u8bf4\uff0c\u4e3a\u4e86\u589e\u52a0\u5355\u4f4d\u65f6\u95f4\u5185\u4f20\u8f93\u7684\u903b\u8f91\u4fe1\u606f\uff0c\u5c31\u641e\u51fa\u4e86<\/span>PAM4\u3002
<\/span><\/section>\n
<\/section>\n
PAM4\uff0c\u5c31\u662f4-Level Pulse Amplitude Modulation\uff0c\u4e2d\u6587\u540d\u53eb\u505a\u56db\u7535\u5e73\u8109\u51b2\u5e45\u5ea6\u8c03\u5236\u3002\u5b83\u662f\u4e00\u79cd\u9ad8\u7ea7\u8c03\u5236\u6280\u672f\uff0c\u91c7\u75284\u4e2a\u4e0d\u540c\u7684\u4fe1\u53f7\u7535\u5e73\u6765\u8fdb\u884c\u4fe1\u53f7\u4f20\u8f93\u3002<\/span><\/section>\n
<\/section>\n
\u8fd8\u662f\u4f20\u8f93011011\uff0c\u5c31\u53d8\u6210\u8fd9\u6837\uff1a<\/span><\/section>\n
<\/section>\n
<\/section>\n
PAM4\u8c03\u5236<\/span><\/section>\n

<\/section>\n
\u8fd9\u6837\u4e00\u6765\uff0c\u5355\u4e2a\u7b26\u53f7\u5468\u671f\u8868\u793a\u7684\u903b\u8f91\u4fe1\u606f\uff0c\u4eceNRZ\u76841bit\uff0c\u53d8\u6210\u4e862bit\uff0c\u7ffb\u4e86\u4e00\u500d\u3002<\/span><\/section>\n
<\/section>\n
<\/section>\n
NRZ VS PAM4 \uff08\u53f3\u8fb9\u662f\u773c\u56fe\uff09<\/span>
<\/section>\n

<\/section>\n
\u90a3\u4e48\u95ee\u9898\u6765\u4e86\uff0c\u5982\u679c4\u7535\u5e73\u80fd\u591f\u7ffb\u4e00\u500d\uff0c\u4e3a\u5565\u6211\u4eec\u4e0d\u641e\u4e2a8\u7535\u5e73\u300116\u7535\u5e73\u300132\u7535\u5e73\uff1f\u901f\u5ea6\u968f\u4fbf\u7ffb\u500d\uff0c\u5c82\u4e0d\u723d\u6b6a\u6b6a\uff1f<\/span><\/section>\n

<\/span><\/section>\n
\u7b54\u6848\u662f\u4e0d\u884c\u3002<\/span><\/section>\n

<\/section>\n
\u4e3b\u8981\u539f\u56e0\uff0c\u8fd8\u662f\u5728\u4e8e\u6fc0\u5149\u5668\u7684\u6280\u672f\u5de5\u827a\u3002\u5b9e\u73b0PAM4\uff0c\u9700\u8981\u6fc0\u5149\u5668\u80fd\u591f\u505a\u5230\u5bf9\u529f\u7387\u7684\u7cbe\u786e\u63a7\u5236\u3002<\/span><\/section>\n

<\/section>\n
\u5982\u679c\u5de5\u827a\u4e0dOK\uff0c\u641e\u66f4\u9ad8\u4f4d\u6570\u7535\u5e73\uff0c\u5c31\u4f1a\u9020\u6210\u5f88\u9ad8\u7684\u8bef\u7801\u7387\uff0c\u65e0\u6cd5\u6b63\u5e38\u5de5\u4f5c\u3002\u5373\u4fbf\u662fPAM4\uff0c\u5982\u679c\u4fe1\u9053\u566a\u58f0\u592a\u5927\uff0c\u4e5f\u662f\u4e0d\u80fd\u6b63\u5e38\u5de5\u4f5c\u7684\u3002<\/span><\/section>\n

<\/p>\n

\u4ec0\u4e48\u662fPDM\u504f\u632f\u591a\u8def\u590d\u7528<\/strong>\u5462\uff1f<\/span><\/p>\n

<\/p>\n

PDM\u504f\u632f\u591a\u8def\u590d\u7528\uff0c\u5c31\u662fPolarization Division Multiplexing\u3002<\/span><\/p>\n


<\/span><\/p>\n

\u4e0d\u77e5\u9053\u5927\u5bb6\u6709\u6ca1\u6709\u770b\u8fc7\u6211\u4e4b\u524d\u5199\u8fc7\u7684\u5173\u4e8e\u5929\u7ebf\u7684\u6587\u7ae0\u3002\u5929\u7ebf\u91cc\u9762\uff0c\u6709\u4e00\u4e2a\u53cc\u6781\u5316\u7684\u6982\u5ff5\uff0c\u5728\u7a7a\u95f4\u4e0a\uff0c\u628a\u7535\u78c1\u6ce2\u201c\u8f6c\u52a8\u201d90\u5ea6\uff0c\u5c31\u53ef\u4ee5\u5b9e\u73b0\u4e24\u4e2a\u72ec\u7acb\u7684\u7535\u78c1\u6ce2\u4f20\u8f93\u3002<\/span><\/p>\n


<\/span><\/p>\n

<\/section>\n

\u5929\u7ebf\u7684\u53cc\u6781\u5316<\/span><\/p>\n

<\/p>\n

\u504f\u632f\u590d\u7528\u7684\u9053\u7406\uff0c\u5176\u5b9e\u4e5f\u5dee\u4e0d\u591a\u3002\u5b83\u5229\u7528\u5149\u7684\u504f\u632f\u7ef4\u5ea6\uff0c\u5728\u540c\u4e00\u6ce2\u957f\u4fe1\u9053\u4e2d\uff0c\u901a\u8fc7\u5149\u7684\u4e24\u4e2a\u76f8\u4e92\u6b63\u4ea4\u504f\u632f\u6001\uff0c\u540c\u65f6\u4f20\u8f93\u4e24\u8def\u72ec\u7acb\u6570\u636e\u4fe1\u606f\uff0c\u4ee5\u6b64\u8fbe\u5230\u63d0\u5347\u7cfb\u7edf\u603b\u5bb9\u91cf\u7684\u76ee\u7684\u3002<\/span><\/p>\n


<\/span><\/p>\n

\u5b83\u7b49\u4e8e\u5b9e\u73b0\u4e86\u53cc\u901a\u9053\u4f20\u8f93\uff0c\u548cPAM4\u4e00\u6837\uff0c\u7ffb\u4e86\u4e00\u500d\u3002<\/span><\/p>\n


<\/span><\/p>\n

<\/span><\/p>\n

PDM\u504f\u632f\u590d\u7528\uff0cX\u504f\u632f\u548cY\u504f\u632f\uff0c\u5404\u81ea\u72ec\u7acb<\/span><\/p>\n

\u56fe\u7247\u6765\u81ea\u662f\u5fb7\u79d1\u6280<\/span><\/p>\n

<\/p>\n

<\/p>\n

\u597d\u5566\uff0c\u4ee5\u4e0a\u5c31\u662f\u4eca\u5929\u6587\u7ae0\u7684\u5168\u90e8\u5185\u5bb9\u3002\u611f\u8c22\u5927\u5bb6\u7684\u8010\u5fc3\u89c2\u770b\uff0c\u6211\u4eec\u4e0b\u671f\u4ecb\u7ecd\u76f8\u5e72\u5149\u901a\u4fe1\uff0c\u4e0d\u89c1\u4e0d\u6563\u54df\uff01<\/span><\/p>\n


<\/span><\/p>\n


<\/span><\/p>\n

\u2014\u2014 \u5168\u6587\u5b8c \u2014\u2014<\/span><\/p>\n


<\/span><\/p>\n

\u53c2\u8003\u6587\u732e\uff1a<\/span><\/strong>
<\/span><\/p>\n

1\u3001\u77e5\u5426\uff0c\u77e5\u5426\uff0c\u4ec0\u4e48\u662f\u76f8\u5e72\u5149\u901a\u4fe1\uff0c\u662f\u5fb7\u79d1\u6280<\/span><\/p>\n

2\u3001\u6234\u7ef4\u5e26\u4f60\u8ba4\u8bc6\u5149\u901a\u8baf\uff0c\u83f2\u5c3c\u8428\u00b7\u6234\u7ef4<\/span><\/p>\n

3\u3001\u8bdd\u8bf4\u5927\u5bb9\u91cf\u5149\u7ea4\u901a\u4fe1\uff0cFiber\uff0c\u77e5\u4e4e<\/span><\/p>\n

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