{"id":449,"date":"2023-09-04T15:06:08","date_gmt":"2023-09-04T07:06:08","guid":{"rendered":"https:\/\/blog.taiyang.space\/?p=449"},"modified":"2023-09-04T15:06:09","modified_gmt":"2023-09-04T07:06:09","slug":"%e7%ac%ac6%e7%ab%a0-%e7%89%a9%e7%90%86%e5%b1%82","status":"publish","type":"post","link":"https:\/\/blog.taiyang.space\/?p=449","title":{"rendered":"\u7b2c6\u7ae0-\u7269\u7406\u5c42"},"content":{"rendered":"<h2 id='61-\u7269\u7406\u5c42\u7684\u57fa\u672c\u6982\u5ff5'>6.1 \u7269\u7406\u5c42\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p><img decoding=\"async\" src=\"https:\/\/picture.chentaiyang.space\/202309041503013.png\" referrerpolicy=\"no-referrer\" alt=\"img\"><\/p>\n<p>\u7269\u7406\u5c42\u7684\u4efb\u52a1\uff1a\u5b8c\u6210\u4e0d\u540c\u4f20\u8f93\u5a92\u4f53\u7684\u6bd4\u7279\u6d41\u4f20\u8f93<\/p>\n<p>\u5b9e\u73b0\u9014\u5f84\uff1a<\/p>\n<ul>\n<li>\u7269\u7406\u7279\u6027\uff1a\u673a\u68b0\u3001\u7535\u5668\u3001\u529f\u80fd\u3001\u8fc7\u7a0b\u7279\u6027\u3002<\/li>\n<li>\u7f16\u7801\uff1a\u7801\u5143\u7684\u6982\u5ff5<\/li>\n<li>\u4f20\u8f93\u6280\u672f<\/li>\n<\/ul>\n<h2 id='62-\u7269\u7406\u5c42\u4e0b\u9762\u7684\u4f20\u8f93\u5a92\u4f53'>6.2 \u7269\u7406\u5c42\u4e0b\u9762\u7684\u4f20\u8f93\u5a92\u4f53<\/h2>\n<h3 id='621-\u5f15\u5bfc\u578b\u4f20\u8f93\u5a92\u4f53'>6.2.1 \u5f15\u5bfc\u578b\u4f20\u8f93\u5a92\u4f53<\/h3>\n<h4 id='\u540c\u8f74\u7535\u7f06'>\u540c\u8f74\u7535\u7f06<\/h4>\n<p><img decoding=\"async\" src=\"https:\/\/picture.chentaiyang.space\/202309041503071.png\" referrerpolicy=\"no-referrer\" alt=\"img\"><\/p>\n<h4 id='\u53cc\u7ede\u7ebf'>\u53cc\u7ede\u7ebf<\/h4>\n<p><img decoding=\"async\" src=\"https:\/\/picture.chentaiyang.space\/202309041503953.png\" referrerpolicy=\"no-referrer\" alt=\"img\"><\/p>\n<h4 id='\u5149\u7ea4'>\u5149\u7ea4<\/h4>\n<p><img decoding=\"async\" src=\"https:\/\/picture.chentaiyang.space\/202309041503921.png\" referrerpolicy=\"no-referrer\" alt=\"img\"><\/p>\n<p>\u539f\u7406\uff1a<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/picture.chentaiyang.space\/202309041503840.png\" referrerpolicy=\"no-referrer\" alt=\"img\"><\/p>\n<p>\u5206\u7c7b\uff1a<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/picture.chentaiyang.space\/202309041503972.png\" referrerpolicy=\"no-referrer\" alt=\"img\"><\/p>\n<h4 id='\u7535\u529b\u7ebf'>\u7535\u529b\u7ebf<\/h4>\n<p><img decoding=\"async\" src=\"https:\/\/picture.chentaiyang.space\/202309041503623.png\" referrerpolicy=\"no-referrer\" alt=\"img\"><\/p>\n<h3 id='622-\u975e\u5f15\u5bfc\u578b\u4f20\u8f93\u5a92\u4f53'>6.2.2 \u975e\u5f15\u5bfc\u578b\u4f20\u8f93\u5a92\u4f53<\/h3>\n<p><img decoding=\"async\" src=\"https:\/\/picture.chentaiyang.space\/202309041503765.png\" referrerpolicy=\"no-referrer\" alt=\"img\"><\/p>\n<h4 id='\u65e0\u7ebf\u7535\u6ce2'>\u65e0\u7ebf\u7535\u6ce2<\/h4>\n<p><img decoding=\"async\" src=\"https:\/\/picture.chentaiyang.space\/202309041503868.png\" referrerpolicy=\"no-referrer\" alt=\"img\"><\/p>\n<h4 id='\u5fae\u6ce2'>\u5fae\u6ce2<\/h4>\n<p><img decoding=\"async\" src=\"https:\/\/picture.chentaiyang.space\/202309041503363.png\" referrerpolicy=\"no-referrer\" alt=\"img\"><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/picture.chentaiyang.space\/202309041503486.png\" referrerpolicy=\"no-referrer\" alt=\"img\"><\/p>\n<h4 id='\u7ea2\u5916\u7ebf'>\u7ea2\u5916\u7ebf<\/h4>\n<p><img decoding=\"async\" src=\"https:\/\/picture.chentaiyang.space\/202309041503939.png\" referrerpolicy=\"no-referrer\" alt=\"img\"><\/p>\n<h2 id='63-\u4f20\u8f93\u65b9\u5f0f\u4fe1\u9053\uff09'>6.3 \u4f20\u8f93\u65b9\u5f0f\uff08\u4fe1\u9053\uff09<\/h2>\n<h3 id='631-\u4fe1\u9053\u7684\u6982\u5ff5'>6.3.1 \u4fe1\u9053\u7684\u6982\u5ff5<\/h3>\n<h3 id='631-\u4e32\u884c\u548c\u5e76\u884c'>6.3.1 \u4e32\u884c\u548c\u5e76\u884c<\/h3>\n<p><img decoding=\"async\" src=\"https:\/\/picture.chentaiyang.space\/202309041503434.png\" referrerpolicy=\"no-referrer\" alt=\"img\"><\/p>\n<h3 id='632-\u540c\u6b65\u548c\u5f02\u6b65'>6.3.2 \u540c\u6b65\u548c\u5f02\u6b65<\/h3>\n<p><img decoding=\"async\" src=\"https:\/\/picture.chentaiyang.space\/202309041503953.png\" referrerpolicy=\"no-referrer\" alt=\"img\"><\/p>\n<h3 id='633-\u5355\u5de5\u534a\u53cc\u5de5\u548c\u5168\u53cc\u5de5'>6.3.3 \u5355\u5de5\u3001\u534a\u53cc\u5de5\u548c\u5168\u53cc\u5de5<\/h3>\n<p><img decoding=\"async\" src=\"https:\/\/picture.chentaiyang.space\/202309041503993.png\" referrerpolicy=\"no-referrer\" alt=\"img\"><\/p>\n<h2 id='64-\u7f16\u7801\u4e0e\u8c03\u5236'>6.4 \u7f16\u7801\u4e0e\u8c03\u5236<\/h2>\n<h3 id='641-\u6982\u5ff5'>6.4.1 \u6982\u5ff5<\/h3>\n<p><img decoding=\"async\" src=\"https:\/\/picture.chentaiyang.space\/202309041503021.png\" referrerpolicy=\"no-referrer\" alt=\"img\"><\/p>\n<h3 id='642-\u5e38\u7528\u7f16\u7801'>6.4.2 \u5e38\u7528\u7f16\u7801<\/h3>\n<ul>\n<li>\u4e0d\u5f52\u96f6\u7f16\u7801\u4e0d\u7eaf\u57280\u7535\u4f4d\uff0c\u53ea\u6709\u9ad8\u7535\u4f4d\u548c\u4f4e\u7535\u4f4d\uff0c\u65e0\u6cd5\u5224\u65ad\u6bcf\u4e2a\u7801\u5143\u7684\u4f4d\u7f6e\uff0c\u9700\u8981\u989d\u5916\u7684\u540c\u6b65\u65f6\u949f\u4fe1\u53f7\u3002<\/li>\n<li>\u5f52\u96f6\u7f16\u7801\u5728\u6bcf\u6b21\u7801\u5143\u7ed3\u675f\u65f6\u90fd\u4f1a\u56de\u5f52\u52300\u7535\u4f4d\uff0c\u4ee5\u6b64\u5b9e\u73b0\u81ea\u540c\u6b65\u7684\u6548\u679c\uff0c\u4f46\u662f\u7f16\u7801\u5229\u7528\u6548\u7387\u4f4e\u3002<\/li>\n<\/ul>\n<p><img decoding=\"async\" src=\"https:\/\/picture.chentaiyang.space\/202309041503053.png\" referrerpolicy=\"no-referrer\" alt=\"img\"><\/p>\n<ul>\n<li>\u66fc\u5f7b\u65af\u7279\u7f16\u7801\uff1a\u4f4d\u5468\u671f\u4e2d\u5fc3\u7684\u5411\u4e0a\u8df3\u53d8\u4ee3\u8868 0\uff0c\u4f4d\u5468\u671f\u4e2d\u5fc3\u7684\u5411\u4e0b\u8df3\u53d8\u4ee3\u8868 1\u3002\u4f46\u4e5f\u53ef\u53cd\u8fc7\u6765\u5b9a\u4e49\u3002\u752810\u4ee3\u88681\uff0c01\u4ee3\u88680\uff0c\u5b9e\u73b0\u6269\u9891\uff0c10Mbps\u523020mbps\u3002<\/li>\n<li>\u5dee\u5206\u66fc\u5f7b\u65af\u7279\u7f16\u7801\uff1a\u5728\u6bcf\u4e00\u4f4d\u7684\u4e2d\u5fc3\u5904\u59cb\u7ec8\u90fd\u6709\u8df3\u53d8\u3002\u4f4d\u5f00\u59cb\u8fb9\u754c\u6709\u8df3\u53d8\u4ee3\u8868 0\uff0c\u4f4d\u5f00\u59cb\u8fb9\u754c\u6ca1\u6709\u8df3\u53d8\u4ee3\u8868 1\u3002\u95ee\uff1a\u6700\u5f00\u59cb\u7684\u65f6\u5019\u600e\u4e48\u5224\u65ad\u6709\u65e0\u8df3\u53d8\uff1f \u7b54\uff1a\u6700\u5f00\u59cb\u7684\u65f6\u5019\u6309\u7167\u66fc\u5207\u65af\u7279\u7f16\u7801\u8bc6\u522b\u3002<\/li>\n<li>\u66fc\u5f7b\u65af\u7279\u7f16\u7801\u548c\u5dee\u5206\u66fc\u5f7b\u65af\u7279\u7f16\u7801\u5177\u6709\u81ea\u540c\u6b65\u80fd\u529b\u3002<\/li>\n<\/ul>\n<p><img decoding=\"async\" src=\"https:\/\/picture.chentaiyang.space\/202309041503177.png\" referrerpolicy=\"no-referrer\" alt=\"img\"><\/p>\n<h3 id='643-\u57fa\u672c\u8c03\u5236\u65b9\u6cd5'>6.4.3 \u57fa\u672c\u8c03\u5236\u65b9\u6cd5<\/h3>\n<p><img decoding=\"async\" src=\"https:\/\/picture.chentaiyang.space\/202309041503251.png\" referrerpolicy=\"no-referrer\" alt=\"img\"><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/picture.chentaiyang.space\/202309041503973.png\" referrerpolicy=\"no-referrer\" alt=\"img\"><\/p>\n<h2 id='65-\u4fe1\u9053\u7684\u6781\u9650\u5bb9\u91cf'>6.5 \u4fe1\u9053\u7684\u6781\u9650\u5bb9\u91cf<\/h2>\n<h3 id='651-\u4fe1\u53f7\u5931\u771f'>6.5.1 \u4fe1\u53f7\u5931\u771f<\/h3>\n<p><img decoding=\"async\" src=\"https:\/\/picture.chentaiyang.space\/202309041503932.png\" referrerpolicy=\"no-referrer\" alt=\"img\"><\/p>\n<h3 id='652-\u5948\u6c0f\u51c6\u5219'>6.5.2 \u5948\u6c0f\u51c6\u5219<\/h3>\n<p><img decoding=\"async\" src=\"https:\/\/picture.chentaiyang.space\/202309041503204.png\" referrerpolicy=\"no-referrer\" alt=\"img\"><\/p>\n<h3 id='653-\u9999\u519c\u516c\u5f0f'>6.5.3 \u9999\u519c\u516c\u5f0f<\/h3>\n<p><img decoding=\"async\" src=\"https:\/\/picture.chentaiyang.space\/202309041503045.png\" referrerpolicy=\"no-referrer\" alt=\"img\"><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/picture.chentaiyang.space\/202309041503095.png\" referrerpolicy=\"no-referrer\" alt=\"img\"><\/p>\n<h3 id='654-\u4e60\u9898'>6.5.4 \u4e60\u9898<\/h3>\n<p><img decoding=\"async\" src=\"https:\/\/picture.chentaiyang.space\/202309041503274.png\" referrerpolicy=\"no-referrer\" alt=\"img\"><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/picture.chentaiyang.space\/202309041503435.png\" referrerpolicy=\"no-referrer\" alt=\"img\"><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/picture.chentaiyang.space\/202309041503610.png\" referrerpolicy=\"no-referrer\" alt=\"img\"><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/picture.chentaiyang.space\/202309041503627.svg+xml\" referrerpolicy=\"no-referrer\" alt=\"img\"><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/picture.chentaiyang.space\/202309041503723.png\" referrerpolicy=\"no-referrer\" alt=\"img\"><\/p>\n<h2 id='66-\u4fe1\u9053\u590d\u7528\u6280\u672f'>6.6 \u4fe1\u9053\u590d\u7528\u6280\u672f<\/h2>\n<h3 id='661-\u9891\u5206\u590d\u7528\u65f6\u5206\u590d\u7528\u548c\u7edf\u8ba1\u65f6\u5206\u590d\u7528'>6.6.1 \u9891\u5206\u590d\u7528\u3001\u65f6\u5206\u590d\u7528\u548c\u7edf\u8ba1\u65f6\u5206\u590d\u7528<\/h3>\n<p>\u590d\u7528 (multiplexing) \uff1a\u5141\u8bb8\u7528\u6237\u4f7f\u7528\u4e00\u4e2a\u5171\u4eab\u4fe1\u9053\u8fdb\u884c\u901a\u4fe1\u3002\u7269\u7406\u5c42\u4e0a\u590d\u7528\u6280\u672f\u662f\u5c06\u591a\u8def\u4fe1\u53f7\u7ec4\u5408\u5728\u4e00\u6761\u7269\u7406\u4fe1\u9053\u4e0a\u8fdb\u884c\u4f20\u8f93\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/picture.chentaiyang.space\/202309041503736.png\" referrerpolicy=\"no-referrer\" alt=\"img\"><\/p>\n<h4 id='\u9891\u5206\u590d\u7528-fdm-frequency-division-multiplexing'>\u9891\u5206\u590d\u7528 FDM (Frequency Division Multiplexing)\uff1a<\/h4>\n<p>\u6700\u57fa\u672c\u7684\u590d\u7528\u6280\u672f\uff0c\u5c06\u6574\u4e2a\u5e26\u5bbd\u5206\u4e3a\u591a\u4efd\uff0c\u7528\u6237\u5728\u5206\u914d\u5230\u4e00\u5b9a\u7684\u9891\u5e26\u540e\uff0c\u5728\u901a\u4fe1\u8fc7\u7a0b\u4e2d\u81ea\u59cb\u81f3\u7ec8\u90fd\u5360\u7528\u8fd9\u4e2a\u9891\u5e26\u3002\u6240\u6709\u7528\u6237\u5728\u540c\u6837\u7684\u65f6\u95f4\u5360\u7528\u4e0d\u540c\u7684\u5e26\u5bbd\uff08\u5373\u9891\u5e26\uff09\u8d44\u6e90\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/picture.chentaiyang.space\/202309041503912.png\" referrerpolicy=\"no-referrer\" alt=\"img\"><\/p>\n<h4 id='\u65f6\u5206\u590d\u7528-tdm-time-division-multiplexing'>\u65f6\u5206\u590d\u7528 TDM (Time Division Multiplexing)<\/h4>\n<p>\u5c06\u65f6\u95f4\u5212\u5206\u4e3a\u4e00\u6bb5\u6bb5\u7b49\u957f\u7684\u65f6\u5206\u590d\u7528\u5e27\uff08TDM\u5e27\uff09\u3002\u6bcf\u4e00\u4e2a\u65f6\u5206\u590d\u7528\u7684\u7528\u6237\u5728\u6bcf\u4e00\u4e2a TDM \u5e27\u4e2d\u5360\u7528\u56fa\u5b9a\u5e8f\u53f7\u7684\u65f6\u9699\u3002\u6bcf\u4e00\u4e2a\u7528\u6237\u6240\u5360\u7528\u7684\u65f6\u9699\u662f\u5468\u671f\u6027\u5730\u51fa\u73b0\uff08\u5176\u5468\u671f\u5c31\u662fTDM\u5e27\u7684\u957f\u5ea6\uff09\u7684\u3002TDM \u4fe1\u53f7\u4e5f\u79f0\u4e3a\u7b49\u65f6 (isochronous) \u4fe1\u53f7\u3002\u6240\u6709\u7528\u6237\u5728\u4e0d\u540c\u7684\u65f6\u95f4\u5360\u7528\u540c\u6837\u7684\u9891\u5e26\u5bbd\u5ea6\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/picture.chentaiyang.space\/202309041503942.png\" referrerpolicy=\"no-referrer\" alt=\"img\"><\/p>\n<p>\u65f6\u5206\u590d\u7528\u4f1a\u5bfc\u81f4\u4fe1\u9053\u5229\u7528\u7387\u4e0d\u9ad8\uff0c\u5f53\u7528\u6237\u6682\u65f6\u65e0\u6570\u636e\u53d1\u9001\u65f6\uff0c\u5206\u914d\u7ed9\u8be5\u7528\u6237\u7684\u65f6\u9699\u53ea\u80fd\u5904\u4e8e\u7a7a\u95f2\u72b6\u6001\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/picture.chentaiyang.space\/202309041503001.png\" referrerpolicy=\"no-referrer\" alt=\"img\"><\/p>\n<p>\u5728\u8fdb\u884c\u901a\u4fe1\u65f6\uff0c\u590d\u7528\u5668(multiplexer)\u603b\u662f\u548c\u5206\u7528\u5668(demultiplexer) \u6210\u5bf9\u5730\u4f7f\u7528\u3002\u5728\u590d\u7528\u5668\u548c\u5206\u7528\u5668\u4e4b\u95f4\u662f\u7528\u6237\u5171\u4eab\u7684\u9ad8\u901f\u4fe1\u9053\u3002\u5206\u7528\u5668\u7684\u4f5c\u7528\u6b63\u597d\u548c\u590d\u7528\u5668\u76f8\u53cd\uff0c\u5b83\u628a\u9ad8\u901f\u4fe1\u9053\u4f20\u9001\u8fc7\u6765\u7684\u6570\u636e\u8fdb\u884c\u5206\u7528\uff0c\u5206\u522b\u9001\u4ea4\u5230\u76f8\u5e94\u7684\u7528\u6237\u3002<\/p>\n<h4 id='\u9891\u5206\u591a\u5740\u4e0e\u65f6\u5206\u591a\u5740'>\u9891\u5206\u591a\u5740\u4e0e\u65f6\u5206\u591a\u5740<\/h4>\n<p>\u53ef\u8ba9 N \u4e2a\u7528\u6237\u5404\u4f7f\u7528\u4e00\u4e2a\u9891\u5e26\uff0c\u6216\u8ba9\u66f4\u591a\u7684\u7528\u6237\u8f6e\u6d41\u4f7f\u7528\u8fd9 N \u4e2a\u9891\u5e26\u3002\u8fd9\u79cd\u65b9\u5f0f\u79f0\u4e3a\u9891\u5206\u591a\u5740\u63a5\u5165 FDMA (Frequency Division Multiple Access)\uff0c\u7b80\u79f0\u4e3a\u9891\u5206\u591a\u5740\u3002\u53ef\u8ba9 N \u4e2a\u7528\u6237\u5404\u4f7f\u7528\u4e00\u4e2a\u65f6\u9699\uff0c\u6216\u8ba9\u66f4\u591a\u7684\u7528\u6237\u8f6e\u6d41\u4f7f\u7528\u8fd9 N \u4e2a\u65f6\u9699\u3002\u8fd9\u79cd\u65b9\u5f0f\u79f0\u4e3a\u65f6\u5206\u591a\u5740\u63a5\u5165 TDMA (Time Division Multiple Access)\uff0c\u7b80\u79f0\u4e3a\u65f6\u5206\u591a\u5740\u3002<\/p>\n<h4 id='\u7edf\u8ba1\u65f6\u5206\u590d\u7528-stdm-statistic-tdm'>\u7edf\u8ba1\u65f6\u5206\u590d\u7528 STDM (Statistic TDM)<\/h4>\n<p><img decoding=\"async\" src=\"https:\/\/picture.chentaiyang.space\/202309041503095.png\" referrerpolicy=\"no-referrer\" alt=\"img\"><\/p>\n<h3 id='662-\u6ce2\u5206\u590d\u7528-wdm-wavelength-division-multiplexing'>6.6.2 \u6ce2\u5206\u590d\u7528 WDM (Wavelength Division Multiplexing)<\/h3>\n<p>\u6ce2\u5206\u590d\u7528 \uff1a\u5149\u7684\u9891\u5206\u590d\u7528\u3002\u4f7f\u7528\u4e00\u6839\u5149\u7ea4\u6765\u540c\u65f6\u4f20\u8f93\u591a\u4e2a\u5149\u8f7d\u6ce2\u4fe1\u53f7\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/picture.chentaiyang.space\/202309041503172.png\" referrerpolicy=\"no-referrer\" alt=\"img\"><\/p>\n<h3 id='663-\u7801\u5206\u590d\u7528'>6.6.3 \u7801\u5206\u590d\u7528<\/h3>\n<p>\u6bcf\u4e00\u4e2a\u7528\u6237\u53ef\u4ee5\u5728\u540c\u6837\u7684\u65f6\u95f4\u4f7f\u7528\u540c\u6837\u7684\u9891\u5e26\u8fdb\u884c\u901a\u4fe1\u3002<\/p>\n<p>\u5404\u7528\u6237\u4f7f\u7528\u7ecf\u8fc7\u7279\u6b8a\u6311\u9009\u7684\u4e0d\u540c\u7801\u578b\uff0c\u56e0\u6b64\u4e0d\u4f1a\u9020\u6210\u5e72\u6270\u3002<\/p>\n<p>\u5f53\u7801\u5206\u590d\u7528 CDM (Code Division Multiplexing) \u4fe1\u9053\u4e3a\u591a\u4e2a\u4e0d\u540c\u5730\u5740\u7684\u7528\u6237\u6240\u5171\u4eab\u65f6\uff0c\u5c31\u79f0\u4e3a\u7801\u5206\u591a\u5740 CDMA (Code Division Multiple Access)\u3002<\/p>\n<p>\u539f\u7406\uff1a<\/p>\n<p>\u5c06\u6bcf\u4e00\u4e2a\u6bd4\u7279\u65f6\u95f4\u5212\u5206\u4e3a m \u4e2a\u77ed\u7684\u95f4\u9694\uff0c\u79f0\u4e3a\u7801\u7247 (chip)\u3002\u4e3a\u6bcf\u4e2a\u7ad9\u6307\u6d3e\u4e00\u4e2a\u552f\u4e00\u7684 m bit \u7801\u7247\u5e8f\u5217\u3002<\/p>\n<ul>\n<li>\u53d1\u9001\u6bd4\u7279 1\uff1a\u53d1\u9001\u81ea\u5df1\u7684 m bit \u7801\u7247\u5e8f\u5217\u3002<\/li>\n<li>\u53d1\u9001\u6bd4\u7279 0\uff1a\u53d1\u9001\u8be5\u7801\u7247\u5e8f\u5217\u7684\u4e8c\u8fdb\u5236\u53cd\u7801\u3002<\/li>\n<\/ul>\n<p>\u4f8b\u5982\uff1aS \u7ad9\u7684 8 bit \u7801\u7247\u5e8f\u5217\u662f 00011011\u3002<\/p>\n<ul>\n<li>1 \uff1a 00011011<\/li>\n<li>0 \uff1a11100100<\/li>\n<\/ul>\n<p>\u4e60\u60ef\u4e0a\uff0c\u7528+1\u4ee3\u88681\uff0c-1\u4ee3\u88680\uff0c\u5982\uff1a\u7801\u7247\u5e8f\u5217\uff1a(\u20131 \u20131 \u20131 +1 +1 \u20131 +1 +1)<\/p>\n<p>\u7801\u7247\u5e8f\u5217\u5b9e\u73b0\u4e86\u6269\u9891\uff1a<\/p>\n<p>\u8981\u53d1\u9001\u4fe1\u606f\u7684\u6570\u636e\u7387 = b bit\/s\uff0c\u5b9e\u9645\u53d1\u9001\u7684\u6570\u636e\u7387 = mb bit\/s\uff0c\u540c\u65f6\uff0c\u6240\u5360\u7528\u9891\u5e26\u5bbd\u5ea6\u4e5f\u63d0\u9ad8\u5230\u539f\u6765\u7684 m \u500d\u3002<\/p>\n<p>\u6269\u9891\u901a\u5e38\u6709 2 \u5927\u7c7b\uff1a<\/p>\n<ul>\n<li>\u76f4\u63a5\u5e8f\u5217\u6269\u9891 DSSS (Direct Sequence Spread Spectrum) \u3002<\/li>\n<li>\u8df3\u9891\u6269\u9891 FHSS (Frequency Hopping Spread Spectrum)\u3002<\/li>\n<\/ul>\n<p>CDMA\u7684\u6570\u5b66\u7279\u6027\uff1a<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/picture.chentaiyang.space\/202309041503195.png\" referrerpolicy=\"no-referrer\" alt=\"img\"><\/p>\n<p>\u4e2a\u4eba\u7406\u89e3\uff1a<\/p>\n<p>CDMA\u8981\u5b9e\u73b0\u591a\u7528\u6237\u540c\u65f6\u4f7f\u7528\u540c\u6837\u7684\u9891\u5e26\u8fdb\u884c\u901a\u4fe1\uff0c\u6700\u91cd\u8981\u7684\u5c31\u662f\u5982\u4f55\u533a\u5206\u4e0d\u540c\u7528\u6237\u7684\u4fe1\u53f7\uff0c\u7531\u4e8e\u4fe1\u53f7\u662f\u4f1a\u53e0\u52a0\u7684\uff0c\u5982\u679c\u6709\u591a\u53f0\u8bbe\u5907\u540c\u65f6\u53d1\u9001\u4fe1\u53f7\uff0c\u5219\u63a5\u6536\u5668\u6536\u5230\u7684\u4fe1\u53f7\u5fc5\u7136\u662f\u591a\u53f0\u8bbe\u5907\u53d1\u9001\u4fe1\u53f7\u7684\u53e0\u52a0\u6001\u3002\u63a5\u6536\u5668\u5982\u4f55\u5b9e\u73b0\u4fe1\u53f7\u7684\u5265\u79bb\uff1f\u5c31\u662f\u4f9d\u9760\u7801\u7247\u5e8f\u5217\u3002\u7801\u7247\u5e8f\u5217\u5c31\u50cf\u662f\u6bcf\u4e2a\u8bbe\u5907\u7684\u8eab\u4efd\u8bc1\u53f7\uff0c\u662f\u552f\u4e00\u7684\u3002\u5e76\u4e14\uff0c\u4e0d\u540c\u8bbe\u5907\u7684\u7801\u7247\u5e8f\u5217\u7684\u89c4\u683c\u5316\u5185\u79ef\u4e3a0\uff0c\u8fd9\u662f\u975e\u5e38\u91cd\u8981\u7684\u7279\u6027\u3002\u524d\u9762\u6211\u4eec\u77e5\u9053\uff0c\u63a5\u6536\u5668\u6536\u5230\u7684\u4fe1\u53f7\u65f6\u591a\u53f0\u8bbe\u5907\u7684\u53e0\u52a0\uff0c\u5047\u8bbe\u6709AB\u4e24\u53f0\u8bbe\u5907\u5206\u522b\u53d1\u51fa\u4e86\u4e00\u4e2a\u6bd4\u7279\u4fe1\u53f7A(+1,+1,+1,-1,+1,-1,+1,-1)\uff0cB(+1,+1,-1,-1,+1,+1,-1,-1)\uff0c\u5219\u63a5\u6536\u5668\u6536\u5230\u7684\u4fe1\u53f7\u5c31\u662f(+2,+2,0,-2,+2,0,0,-2)\u3002\u5047\u8bbeA\u7684\u7801\u7247\u5e8f\u5217\uff08\u8eab\u4efd\u8bc1\u53f7\uff09\u4e3a(+1,+1,+1,-1,+1,-1,+1,-1)\uff0cB\u7684\u7801\u7247\u5e8f\u5217\u4e3a(-1,-1,+1,+1,-1,-1,+1,+1)\uff0c\u5219\u63a5\u6536\u5668\u5982\u679c\u8981\u63a5\u53d7A\u7684\u4fe1\u53f7\uff0c\u5219\u7528A\u7684\u7801\u7247\u5e8f\u5217\u8fdb\u884c\u89c4\u683c\u5316\u5185\u79ef\uff0c\u5f97\u5230\u7684\u662f1\uff0c\u8bf4\u660e\u6536\u5230\u7684\u662f\u6bd4\u72791\uff0c\u5982\u679c\u63a5\u53d7B\u7684\u4fe1\u53f7\uff0c\u5219\u7528B\u7684\u7801\u7247\u5e8f\u5217\u8fdb\u884c\u89c4\u683c\u5316\u5185\u79ef\uff0c\u5f97\u5230-1\uff0c\u8bf4\u660e\u662f\u6bd4\u72790\u3002\u6b64\u65f6\uff0c\u5982\u679c\u8fd8\u6709\u4e00\u4e2a\u8bbe\u5907C\u7684\u7801\u7247\u5e8f\u5217\uff0c\u8fdb\u884c\u89c4\u683c\u5316\u5185\u79ef\u5f97\u5230\u7684\u4e00\u5b9a\u4e3a0,\uff08\u89c1CDMA\u7684\u6570\u5b66\u7279\u60271\uff09\uff0c\u8bf4\u660e\u6ca1\u6709C\u8bbe\u5907\u53d1\u9001\u7684\u4fe1\u53f7\u3002\u53ef\u4ee5\u8bf4\u662f\u975e\u5e38\u5de7\u5999\u4e86\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>6.1 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