{"id":354,"date":"2019-04-30T16:01:14","date_gmt":"2019-04-30T08:01:14","guid":{"rendered":"http:\/\/www.epsglobal.cn\/blog\/?p=354"},"modified":"2019-04-30T16:01:14","modified_gmt":"2019-04-30T08:01:14","slug":"%e6%97%a0%e7%ba%bf%e7%bd%91%e7%bb%9c-%e6%89%80%e6%9c%89%e7%94%9f%e6%b4%bb%e9%97%ae%e9%a2%98%e7%9a%84%e5%8e%9f%e5%9b%a0%e5%92%8c%e8%a7%a3%e5%86%b3%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/epsglobal.cn\/index.php\/2019\/04\/30\/%e6%97%a0%e7%ba%bf%e7%bd%91%e7%bb%9c-%e6%89%80%e6%9c%89%e7%94%9f%e6%b4%bb%e9%97%ae%e9%a2%98%e7%9a%84%e5%8e%9f%e5%9b%a0%e5%92%8c%e8%a7%a3%e5%86%b3%e6%96%b9%e6%b3%95\/","title":{"rendered":"\u65e0\u7ebf\u7f51\u7edc &#8211; 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src=\"http:\/\/www.epsglobal.cn\/blog\/wp-content\/uploads\/2019\/04\/quadra-780x400px-chinese-300x154.png\" alt=\"\" width=\"300\" height=\"154\" 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loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-medium wp-image-356\" src=\"http:\/\/www.epsglobal.cn\/blog\/wp-content\/uploads\/2019\/04\/Picture1-300x172.png\" alt=\"wifi\" width=\"300\" height=\"172\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>\u9996\u5148\u8981\u6f84\u6e05\u7684\u662f\uff0c\u65e0\u7ebf\u7f51\u7edc\u5e76\u4e0d\u50cf\u4e00\u4e9b\u4eba\u8ba4\u4e3a\u7684\u90a3\u6837\u3002\u5176\u6700\u521d\u79f0\u4e3aIEEE 802.11b\u76f4\u63a5\u5e8f\u5217\uff0c\u4e00\u5bb6\u54c1\u724c\u54a8\u8be2\u516c\u53f8 Interbrand \u53d7\u96c7\u60f3\u51fa\u4e00\u4e2a\u66f4\u5408\u9002\u7684\u540d\u5b57\u3002\u9664\u4e86\u65e0\u7ebf\u7f51\u7edc\u8fd9\u4e2a\u540d\u5b57\uff0c\u4ed6\u4eec\u8fd8\u521b\u9020\u4e86\u6211\u4eec\u73b0\u5728\u975e\u5e38\u719f\u6089\u7684\u6807\u5fd7\u3002\u53ef\u4ee5\u8bf4\u4ed6\u4eec\u786e\u5b9e\u5e72\u5f97\u4e0d\u9519\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u9996\u5148\uff0c\u6211\u4eec\u53ef\u4ee5\u8ffd\u6eaf\u52301971\u5e74\u5728\u590f\u5a01\u5937\u5f00\u53d1\u7684ALOHAnet\u7cfb\u7edf\uff0c\u4f46\u6211\u4eec\u8df3\u8fc7\u8fd9\u90e8\u5206\uff0c\u76f4\u63a5\u4ece1997\u5e74\u5f00\u59cb\u3002\u4e5f\u5c31\u662f\u662fIEEE\u53d1\u5e03\u9996\u4e2a802.11\u6807\u51c6\u7684\u65f6\u95f4\u3002\u5176\u4f7f\u7528\u8df3\u9891\u6216\u76f4\u63a5\u5e8f\u5217\u6269\u9891\uff08DSSS \uff09\u4f5c\u4e3a\u8c03\u5236\u6280\u672f\uff0c\u57282.4 GHz\u4e0a\u89c4\u5b9a\u4e861\u548c2 Mbps\u76842\u4e2a\u539f\u59cb\u6570\u636e\u901f\u7387\uff0c\u6211\u7a0d\u540e\u4f1a\u4ecb\u7ecd\u8fd9\u90e8\u5206\u3002\u5b83\u8fd8\u5f15\u5165\u4e86\u8f7d\u6ce2\u68c0\u6d4b\u591a\u8def\u8bbf\u95ee\u548c\u51b2\u7a81\u907f\u514d\u7684\u6982\u5ff5\uff08CSMA\/CA\uff09\u3002\u8fd9\u662f\u4e00\u4e2a\u7b80\u5355\u4f46\u975e\u5e38\u91cd\u8981\u7684\u534f\u8bae\uff0c\u5176\u5de5\u4f5c\u539f\u7406\u662f\u8ba9\u9700\u8981\u53d1\u9001\u6570\u636e\u5305\u7684\u8282\u70b9\u68c0\u67e5\u4fe1\u9053\u662f\u5426\u7545\u901a\u3002\u5982\u679c\u4e0d\u7545\u901a\uff0c\u5219\u8282\u70b9\u7b49\u5f85\u9884\u5b9a\u7684\u9000\u907f\u65f6\u6bb5\uff0c\u5e76\u518d\u6b21\u68c0\u67e5\u4fe1\u9053\u662f\u5426\u7545\u901a\u3002\u4e00\u65e6\u4fe1\u9053\u7545\u901a\uff0c\u8282\u70b9\u5c06\u5b89\u5168\u5730\u53d1\u9001\u6570\u636e\u5305\uff0c\u4e0d\u4f1a\u4e2d\u65ad\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u6700\u521d\u7684802.11\u6807\u51c6\u662f\u5931\u8d25\u7684\u3002\u867d\u7136IEEE\u5728\u4ea7\u751f\u534f\u8bae\u65b9\u9762\u8868\u73b0\u51fa\u8272\uff0c\u4f46\u4ed6\u4eec\u6ca1\u6709\u5728\u4e92\u64cd\u4f5c\u6027\u6216\u6d4b\u8bd5\u786c\u4ef6\u662f\u5426\u7b26\u5408\u6807\u51c6\u65b9\u9762\u505a\u4efb\u4f55\u5de5\u4f5c\u3002\u52301999\u5e74\uff0cIEEE\u53c8\u53d1\u5e03\u4e86\u4e24\u4e2a\u534f\u8bae\uff0c\u5206\u522b\u662f802.11a\u548c802.11b\uff0ca\u7684\u9891\u7387\u8303\u56f4\u4e3a5 GHz\uff0c\u800cb\u7684\u9891\u7387\u8303\u56f4\u4e3a2.4 GHz\u3002\u6b63\u5982\u60a8\u6240\u6599\uff0c\u6570\u636e\u901f\u7387\u548c\u8303\u56f4\u5927\u5e45\u589e\u52a0\uff0c\u4f461999\u5e74\u7684\u6700\u91cd\u5927\u4e8b\u4ef6\u662f\u65e0\u7ebf\u8054\u76df\u7684\u5efa\u7acb\u3002\u8fd9\u4e2a\u975e\u8425\u5229\u7ec4\u7ec7\u81ea\u79f0\u5176\u6210\u5458\u5747\u4e3a\u4e16\u754c\u77e5\u540d\u4f01\u4e1a\uff0c\u6beb\u65e0\u7591\u95ee\uff0c\u5176\u4f7f\u65e0\u7ebf\u7f51\u7edc\u907f\u514d\u518d\u6b21\u5931\u8d25\u3002\u4ed6\u4eec\u786e\u7acb\u4e86\u5546\u6807\u540d\u3001\u6807\u8bc6\u3001\u4ea7\u54c1\u5b89\u5168\u6027\u8ba4\u8bc1\u3001\u4e92\u64cd\u4f5c\u6027\u3001\u5411\u540e\u517c\u5bb9\u6027\u7b49\u8bb8\u591a\u6211\u6ca1\u6709\u65f6\u95f4\u8ba8\u8bba\u7684\u5185\u5bb9\u3002<\/p>\n<h2>\n<strong><b>\u6807\u51c6\u3001\u4fe1\u9053\u548c\u8c03\u5236<\/b><\/strong><\/h2>\n<p>&nbsp;<\/p>\n<p><strong><b>\u6807\u51c6<\/b><\/strong><\/p>\n<p>\u5728\u4ec5\u4ec520\u591a\u5e74\u7684\u65f6\u95f4\u91cc\uff0cIEEE\u63d0\u51fa\u4e86\u8d85\u8fc720\u4e2a802.11\u65e0\u7ebf\u6807\u51c6\uff0c\u4f46\u6211\u4eec\u5c06\u5173\u6ce8\u6211\u4eec\u5df2\u4f7f\u7528\u6216\u5c06\u6765\u8981\u4f7f\u7528\u7684\u4e3b\u8981\u6807\u51c6\u3002\u4e0b\u56fe\u663e\u793a\u4e86\u6700\u65e9\u5e7f\u6cdb\u91c7\u7528\u7684\u534f\u8bae\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-medium wp-image-357\" src=\"http:\/\/www.epsglobal.cn\/blog\/wp-content\/uploads\/2019\/04\/table-780x560px-chinese-300x215.png\" alt=\"\" width=\"300\" height=\"215\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>\u76ee\u524d\uff0c\u6211\u4eec\u5927\u591a\u6570\u4eba\u5c06\u4f7f\u7528n\u6216ac\u6807\u51c6\u3002\u5feb\u901f\u67e5\u770b\u60a8\u6240\u5728\u65e0\u7ebf\u7f51\u7edc\u7684\u5c5e\u6027\u53ef\u83b7\u53d6\u6b64\u7c7b\u4fe1\u606f\u3002\u5b83\u8fd8\u4f1a\u63d0\u4f9bSSID\uff08\u670d\u52a1\u96c6\u6807\u8bc6\u7b26\uff09\uff0c\u5373\u7f51\u7edc\u540d\u79f0\u3001\u5b89\u5168\u7c7b\u578b\uff08WPA\u3001WPA2\u3001WPA3\uff09\u4ee5\u53ca\u60a8\u6240\u5728\u7684\u4fe1\u9053\u3002\u6700\u65b0\u534f\u8bae\u79f0\u4e3a802.11ax\u6216Wi-Fi 6\uff0c\u8fd9\u5c06\u8fce\u6765\u5343\u5146\u6bd4\u7279\u65e0\u7ebf\u7f51\u7edc\u7684\u7f8e\u597d\u65b0\u4e16\u754c\u3002\u5176\u6539\u8fdb\u4e86802.11ac\u4e2d\u4f7f\u7528\u7684\u6280\u672f\u6765\u5b9e\u73b0\u8fd9\u4e00\u76ee\u6807\uff0c\u6211\u5c06\u5728\u4e4b\u540e\u7684\u535a\u5ba2\u4e2d\u8be6\u7ec6\u4ecb\u7ecd\u3002<\/p>\n<p>&nbsp;<\/p>\n<p><strong><b>\u4fe1\u9053<\/b><\/strong><\/p>\n<p>\u53e6\u4e00\u4e2a\u9700\u8981\u7406\u89e3\u7684\u57fa\u672c\u6982\u5ff5\u662f\u5728\u65e0\u7ebf\u7f51\u7edc\u4e2d\u4fe1\u9053\u7684\u4f7f\u7528\u3002\u57282.4 GHz\u9891\u7387\u8303\u56f4\u5185\uff0c\u670914\u4e2a\u4fe1\u9053\uff0c\u5176\u4e2d\u4fe1\u90531\u30016\u548c11\u4e0d\u91cd\u53e0\u3002\u4e3a\u4e86\u4ece\u60a8\u7684\u4fe1\u53f7\u4e2d\u83b7\u5f97\u6700\u4f73\u6548\u679c\uff0c\u5fc5\u987b\u9009\u62e9\u6b63\u786e\u7684\u4fe1\u53f7\u3002\u5982\u679c\u60a8\u5728\u4fe1\u90536\uff0c\u800c\u60a8\u90bb\u5c45\u7684\u8def\u7531\u5668\u4e5f\u5728\u4fe1\u90535\u30016\u62167\uff0c\u90a3\u60a8\u5c06\u906d\u9047\u76f8\u90bb\u4fe1\u9053\u5e72\u6270\u3002\u5728\u60a8\u7684\u624b\u673a\u4e0a\u4e0b\u8f7d\u4efb\u4f55\u65e0\u7ebf\u5206\u6790\u4eea\uff0c\u68c0\u770b\u60a8\u7684\u90bb\u8fd1\u7f51\u7edc\uff0c\u68c0\u67e5\u4fe1\u9053\u91cd\u53e0\u60c5\u51b5\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-medium wp-image-358\" src=\"http:\/\/www.epsglobal.cn\/blog\/wp-content\/uploads\/2019\/04\/wifi-channels-chinese-300x128.jpg\" alt=\"\" width=\"300\" height=\"128\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>\u4e0a\u56fe\u6765\u81ea\u6211\u7684\u624b\u673a\uff0c\u663e\u793a\u4e86\u6211\u81ea\u5df1\u7684\u7f51\u7edc\u201cBarry TV\u201d\u9644\u8fd1\u7684\u5176\u4ed63\u4e2a\u8bbe\u5907\u3002\u6240\u9009\u4fe1\u9053\u4f4d\u4e8e\u5e95\u90e8\uff0cdBm\uff08\u5206\u8d1d\u6beb\u74e6\uff09\u8868\u660e\u5de6\u4fa7\u65e0\u7ebf\u4fe1\u53f7\u5f3a\u5ea6\u3002\u60a8\u53ef\u4ee5\u770b\u5230\uff0c\u6211\u7684\u8bbe\u5907\u4f7f\u7528\u4e86\u5176\u81ea\u6709\u76844\u4e2a\u4fe1\u9053\uff0c\u5e76\u4e14\u5176\u5728\u4e00\u4e2a\u4fe1\u9053\u4e0a\u4e0e\u9ec4\u8272\u7f51\u7edc\u91cd\u53e0\u3002\u5982\u679c\u6211\u628a\u7f51\u7edc\u8f6c\u79fb\u5230\u4fe1\u90537\u800c\u975e\u4fe1\u90536\uff0c\u90a3\u6211\u4f1a\u83b7\u5f97\u66f4\u597d\u7684\u670d\u52a1\u3002\u5f53\u5b58\u5728\u4e0a\u767e\u4e2a\u63a5\u5165\u70b9\u7684\u5927\u578b\u5b89\u88c5\u65f6\uff0c\u4fe1\u9053\u4e5f\u8d77\u4e86\u5f88\u5927\u4f5c\u7528\uff0c\u6211\u4eec\u5c06\u518d\u6b21\u8ba8\u8bba\u8fd9\u90e8\u5206\u3002<\/p>\n<p>&nbsp;<\/p>\n<p><strong><b>\u65e0\u7ebf\u7535\u6ce2\u8c03\u5236<\/b><\/strong><\/p>\n<p>&nbsp;<\/p>\n<p>\u6211\u60f3\u8ba8\u8bba\u7684\u6700\u540e\u4e00\u4e2a\u8bdd\u9898\u662f\u65e0\u7ebf\u7535\u6ce2\u7684\u8c03\u5236\u4ee5\u53ca\u5982\u4f55\u5728\u6ce2\u5f62\u4e2d\u8868\u793a1s\u548c0s\u3002\u8c03\u5236\u662f\u5c06\u6570\u636e\uff08\u65e0\u8bba\u662f\u89c6\u9891\u3001\u97f3\u9891\u3001\u56fe\u50cf\u8fd8\u662f\u6587\u672c\uff09\u6dfb\u52a0\u5230\u8f7d\u6ce2\u4fe1\u53f7\u4e2d\u7684\u8fc7\u7a0b\uff0c\u5728\u672c\u4f8b\u4e2d\uff0c\u8f7d\u6ce2\u4fe1\u53f7\u5c31\u662f\u65e0\u7ebf\u7535\u6ce2\u3002\u4e00\u65e6\u5230\u8fbe\u76ee\u7684\u5730\uff0c\u5c31\u9700\u8981\u89e3\u8c03\u3002\u81ea90\u5e74\u4ee3\u672b\u4ee5\u6765\uff0c\u5df2\u4f7f\u7528\u4e86\u8bb8\u591a\u4e0d\u540c\u7684\u7c7b\u578b\uff0c\u6280\u672f\u4e5f\u6709\u4e86\u5f88\u5927\u7684\u6539\u8fdb\u3002\u6709\u4ee5\u4e0b4\u4e2a\u4e3b\u8981\u7684\u8c03\u5236\u9886\u57df\uff1a<\/p>\n<p>&nbsp;<\/p>\n<p><strong><b>\u6a21\u62df 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&#8211;<\/b><\/strong>\u00a0\u4e3a\u5c06\u6570\u5b57\u4fe1\u53f7\u8f6c\u6362\u6210\u6a21\u62df\u4fe1\u53f7\u7684\u8fc7\u7a0b\uff0c\u5927\u591a\u6570\u4f20\u8f93\u91c7\u7528\u8fd9\u79cd\u683c\u5f0f\u3002\u67094\u79cd\u7c7b\u578b\uff0c\u5b83\u4eec\u662f\u5e45\u79fb\u952e\u63a7\uff08ASK\uff09\u3001\u9891\u79fb\u952e\u63a7\uff08FSK\uff09\u3001\u76f8\u79fb\u952e\u63a7\uff08PSK\uff09\uff0c\u6700\u540e\u662f\u73b0\u5728\u7684\u6b63\u4ea4\u632f\u5e45\u8c03\u5236\uff08QAM\uff09\u3002\u524d3\u4e2a\u6539\u53d8\u6ce2\u5f62\u7684\u65b9\u5f0f\u4e0e\u6211\u5728\u6a21\u62df\u8c03\u5236\u4e2d\u89e3\u91ca\u7684\u76f8\u540c\uff0c\u4e3a\u6bcf\u4e2a\u6ce2\u5f62\u521b\u5efa1\u62160\u3002\u6b64\u7c7b\u6280\u672f\u7684\u7b2c\u4e8c\u4ee3\u5728\u540d\u5b57\u524d\u52a0\u4e0a\u4e86\u6b63\u4ea4\uff0c\u56e0\u6b64\u6210\u4e3aQPSK\uff0c\u80fd\u4ea7\u751f\u6bcf\u4e2a\u6ce2\u5f622\u4f4d\uff0800\u300101\u300110\u300111\uff09\uff0c\u4f7f\u6570\u636e\u901f\u7387\u52a0\u500d\u3002\u7136\u540e\u901a\u8fc7\u540c\u65f6\u6539\u53d8\u76f8\u4f4d\u548c\u632f\u5e45\uff0c16-QAM\u5c06\u6b64\u503c\u63d0\u9ad8\u5230\u6bcf\u4e2a\u6ce2\u5f624\u4f4d\uff080000\u30010001\u30010010\u2026\u2026\uff09\u300264-QAM\u5c06\u6b64\u503c\u63d0\u9ad8\u5230\u6bcf\u6ce26\u4f4d\uff0c\u7136\u540e256-QAM\u6700\u7ec8\u8fbe\u52308\u4f4d\uff0c\u4f7f\u6211\u4eec\u7684\u6570\u636e\u901f\u7387\u53d8\u4e3a\u5f00\u59cb\u65f6\u76848\u500d\u3002\u73b0\u5728\u51fa\u73b0\u4e861024-QAM\u548cWi-Fi6\uff0c\u6211\u5c06\u5728\u4e4b\u540e\u7684\u535a\u5ba2\u6587\u7ae0\u4e2d\u5bf9\u5176\u8fdb\u884c\u8ba8\u8bba\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-360\" src=\"http:\/\/www.epsglobal.cn\/blog\/wp-content\/uploads\/2019\/04\/16QAM-280x210px.png\" alt=\"\" width=\"280\" height=\"210\" \/><\/p>\n<p><strong><b>\u5206\u7ea7 <\/b><\/strong><strong><b>\u2013<\/b><\/strong>\u00a0\u6b64\u7c7b\u8c03\u5236\u6280\u672f\u4e3b\u8981\u7528\u4e8e\u6570\u5b57\u7535\u89c6\u5e7f\u64ad\uff0c\u5e76\u7528\u4e8e\u51cf\u8f7b\u60ac\u5d16\u6548\u5e94\u7684\u5f71\u54cd\u3002\u8fd9\u662f\u6570\u5b57\u4fe1\u53f7\u63a5\u6536\u7684\u7a81\u7136\u4e22\u5931\u73b0\u8c61\u3002\u6211\u4eec\u8ba8\u8bba\u8fc7\u7684QAM\u662f\u7528\u4e8e\u5206\u5c42\u7684\u4e3b\u8981\u8c03\u5236\u65b9\u5f0f\u3002<\/p>\n<p><strong><b>\u5c55\u5e03\u9891\u8c31 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go 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