{"id":763,"date":"2019-10-14T09:38:09","date_gmt":"2019-10-14T01:38:09","guid":{"rendered":"http:\/\/iqotom.com\/?p=763"},"modified":"2019-11-02T17:09:05","modified_gmt":"2019-11-02T09:09:05","slug":"wifi%e6%97%a0%e7%ba%bf%e5%8d%8f%e8%ae%ae802-11a-b-g-n-ac%e7%9a%84%e6%bc%94%e5%8f%98%e4%bb%a5%e5%8f%8a%e5%8c%ba%e5%88%ab","status":"publish","type":"post","link":"http:\/\/iqotom.com\/?p=763","title":{"rendered":"WIFI\u65e0\u7ebf\u534f\u8bae802.11a\/b\/g\/n\/ac\u7684\u6f14\u53d8\u4ee5\u53ca\u533a\u522b"},"content":{"rendered":"\n<p> ================================================================<br>\u300a <a href=\"http:\/\/iqotom.com\/?p=771\">802.11abgn\u4e0e802.11ac\u7684\u533a\u522b\u4ee5\u53ca\u8be6\u7ec6\u4ecb\u7ecd<\/a> \u300b<br>\u300a<a href=\"http:\/\/iqotom.com\/?p=763\">WIFI\u65e0\u7ebf\u534f\u8bae802.11a\/b\/g\/n\/ac\u7684\u6f14\u53d8\u4ee5\u53ca\u533a\u522b<\/a>\u300b<br>\u300a<a href=\"http:\/\/iqotom.com\/?p=1102\">802.11\u534f\u8bae\u8be6\u89e3<\/a>\u300b<br>================================================================ <\/p>\n\n\n\n<p>\u6beb\u65e0\u7591\u95ee\uff0cWiFi\u7684\u51fa\u73b0\u666e\u53ca\u5e26\u7ed9\u6211\u4eec\u5de8\u5927\u7684\u4e0a\u7f51\u4fbf\u5229\uff0c\u6240\u4ee5\u4e86\u89e3\u4e00\u4e0bWiFi\u5bf9\u5e94\u7684802.11\u534f\u8bae\u7684\u6f14\u53d8\u548c\u73b0\u5728\u4e0d\u540c\u7248\u672c\u4e4b\u524d\u7684\u533a\u522b\u4e5f\u662f\u975e\u5e38\u6709\u5fc5\u8981\u7684\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u5e38\u8bc6\u666e\u53ca<\/h3>\n\n\n\n<p>Wi-Fi\u662f\u4e00\u79cd\u5141\u8bb8\u7535\u5b50\u8bbe\u5907\u8fde\u63a5\u5230\u4e00\u4e2a\u65e0\u7ebf\u5c40\u57df\u7f51\uff08WLAN\uff09\u7684\u6280\u672f\uff0c\u901a\u5e38\u4f7f\u75282.4G UHF\u62165G SHF ISM \u5c04\u9891\u9891\u6bb5\u3002\u8fde\u63a5\u5230\u65e0\u7ebf\u5c40\u57df\u7f51\u901a\u5e38\u662f\u6709\u5bc6\u7801\u4fdd\u62a4\u7684\uff1b\u4f46\u4e5f\u53ef\u662f\u5f00\u653e\u7684\uff0c\u8fd9\u6837\u5c31\u5141\u8bb8\u4efb\u4f55\u5728WLAN\u8303\u56f4\u5185\u7684\u8bbe\u5907\u53ef\u4ee5\u8fde\u63a5\u4e0a\u3002Wi-Fi\u662f\u4e00\u4e2a\u65e0\u7ebf\u7f51\u7edc\u901a\u4fe1\u6280\u672f\u7684\u54c1\u724c\uff0c\u7531Wi-Fi\u8054\u76df\u6240\u6301\u6709\u3002<\/p>\n\n\n\n<p>\u5173\u4e8e&#8221;Wi-Fi\u201d\u8fd9\u4e2a\u7f29\u5199\u8bcd\u7684\u53d1\u97f3\uff0c\u6839\u636e\u82f1\u6587\u6807\u51c6\u97e6\u4f2f\u65af\u7279\u8bcd\u5178\u7684\u8bfb\u97f3\u6ce8\u91ca\uff0c\u6807\u51c6\u53d1\u97f3\u4e3a\/\u02c8wa\u026a.fa\u026a\/\u56e0\u4e3aWi-Fi\u8fd9\u4e2a\u5355\u8bcd\u662f\u4e24\u4e2a\u5355\u8bcd\u7ec4\u6210\u7684\uff0c\u6240\u4ee5\u4e66\u5199\u5f62\u5f0f\u6700\u597d\u4e3aWI-FI\uff08WIFI :WIreless-FIdelity\u65e0\u7ebf\u8fde\u63a5 Wi-Fi ,\u4e2d\u6587\u540d\u65e0\u7ebf\u4fdd\u771f \uff09\uff0c\u8fd9\u6837\u4e5f\u5c31\u4e0d\u5b58\u5728\u6240\u8c13\u4e13\u5bb6\u6240\u8bf4\u7684\u8bfb\u97f3\u95ee\u9898\uff0c\u540c\u7406\u6709HI-FI\uff08\/ha\u026a.fa\u026a\/\uff09\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u5386\u53f2\u7248\u672c\u5bf9\u6bd4<\/h3>\n\n\n\n<table class=\"wp-block-table\"><tbody><tr><td>\u534f\u8bae<\/td><td>\u9891\u7387(Ghz)<\/td><td>\u4fe1\u53f7<\/td><td>\u4f20\u8f93\u91cf<br> (Mbps) <\/td><td>\u53d1\u5e03<br> \u65f6\u95f4<\/td><td>\u6027\u80fd\u6f14\u53d8<\/td><\/tr><tr><td>802.11<\/td><td>2.4<\/td><td>FHSS\/DSS<\/td><td>2<\/td><td>1997<\/td><td>\u5b83\u662f\u7b2c\u4e00\u4ee3\u65e0\u7ebf\u5c40\u57df\u7f51\u6807\u51c6\u4e4b\u4e00<\/td><\/tr><tr><td>802.11a<\/td><td>5<\/td><td>OFDM<\/td><td>54<\/td><td>1999<\/td><td>IEEE802.11a\u5728\u6574\u4e2a\u8986\u76d6\u8303\u56f4\u5185\u63d0\u4f9b\u4e86\u66f4\u9ad8\u7684\u901f\u5ea6\uff0c\u89c4\u5b9a\u7684\u9891\u70b9\u4e3a5GHz\u3002\u76ee\u524d\u8be5\u9891\u6bb5\u7528\u5f97\u4e0d\u591a\uff0c\u5e72\u6270\u548c\u4fe1\u53f7\u4e89\u7528\u60c5\u51b5\u8f83\u5c11\u3002802.1la\u540c\u6837\u91c7\u7528CSMA\/CA\u534f\u8bae\u3002\u4f46\u5728\u7269\u7406\u5c42\uff0c802.11a \u91c7\u7528\u4e86\u6b63\u4ea4\u9891\u5206\u590d\u7528\uff08Orthogonal Frequency Division Multiplexing\uff0cOFDM\uff09\u6280\u672f\u3002<\/td><\/tr><tr><td>802.11b<\/td><td>2.4<\/td><td>HR-DSSS<\/td><td>11<\/td><td>1999<\/td><td>\u65e2\u53ef\u4f5c\u4e3a\u5bf9\u6709\u7ebf\u7f51\u7edc\u7684\u8865\u5145\uff0c\u4e5f\u53ef\u72ec\u7acb\u7ec4\u7f51\uff0c\u4ece\u800c\u4f7f\u7f51\u7edc\u7528\u6237\u6446\u8131\u7f51\u7ebf\u7684\u675f\u7f1a\uff0c\u5b9e\u73b0\u771f\u6b63\u610f\u4e49\u4e0a\u7684\u79fb\u52a8\u5e94\u7528\u3002IEEE 802.11b\u7684\u5173\u952e\u6280\u672f\u4e4b\u4e00\u662f\u91c7\u7528\u8865\u507f\u7801\u952e\u63a7CCK\u8c03\u5236\u6280\u672f\uff0c\u53ef\u4ee5\u5b9e\u73b0\u52a8\u6001\u901f\u7387\u8f6c\u6362\u3002\u7684\u8303\u56f4\u662f\u5728\u5ba4\u5916\u4e3a300 \u7c73\uff0c\u5728\u529e\u516c\u73af\u5883\u4e2d\u6700\u957f\u4e3a100\u7c73<\/td><\/tr><tr><td>802.11g<\/td><td>2.4<\/td><td>OFDM<\/td><td>54<\/td><td>2003<\/td><td>\u4f7f\u547d\u5c31\u662f\u517c\u987e802.11a\u548c802.11b\uff0c\u4e3a802.11b\u8fc7\u6e21\u5230802.11a\u94fa\u8def\u4fee\u6865\u3002802.11g\u4e2d\u89c4\u5b9a\u7684\u8c03\u5236\u65b9\u5f0f\u5305\u62ec802.11a\u4e2d\u91c7\u7528\u7684OFDM\u4e0e802.11b\u4e2d\u91c7\u7528\u7684 CCK\u3002\u901a\u8fc7\u89c4\u5b9a\u4e24\u79cd\u8c03\u5236\u65b9\u5f0f\uff0c\u65e2\u8fbe\u5230\u4e86\u75282\uff0e4GHz\u9891\u6bb5\u5b9e\u73b0IEEE 802.11a 54Mbit\/s\u7684\u6570\u636e\u4f20\u9001\u901f\u5ea6\uff0c\u4e5f\u786e\u4fdd\u4e86\u4e0eIEEE802.11b\u4ea7\u54c1\u7684\u517c\u5bb9\u3002\u5ba4\u518530\u7c73\uff0c\u5ba4\u5916100\u7c73\u3002\u88ab\u5e7f\u6cdb\u5e94\u7528<\/td><\/tr><tr><td>802.11n<\/td><td>2.4\/5<\/td><td>OFDM<\/td><td>540<\/td><td>2008<\/td><td>\u901f\u7387\u63d0\u5347\uff0c\u7406\u8bba\u901f\u7387\u6700\u9ad8\u53ef\u8fbe600Mbps\uff0c802.11n\u53ef\u5de5\u4f5c\u57282.4GHz\u548c5GHz\u4e24\u4e2a\u9891\u6bb5\u3002 \u5ba4\u518570\u7c73\u5ba4\u5916250\u7c73<\/td><\/tr><tr><td>802.11ac<\/td><td>5<\/td><td>OFDM<\/td><td>600<\/td><td>2012<\/td><td>802.11ac\u662f802.11n\u7684\u7ee7\u627f\u8005\u3002\u5b83\u91c7\u7528\u5e76\u6269\u5c55\u4e86\u6e90\u81ea802.11n\u7684\u7a7a\u4e2d\u63a5\u53e3(air interface)\u6982\u5ff5\uff0c\u5305\u62ec:\u66f4\u5bbd\u7684RF\u5e26\u5bbd(\u63d0\u5347\u81f3160MHz)\uff0c\u66f4\u591a\u7684MIMO\u7a7a\u95f4\u6d41(spatial streams)(\u589e\u52a0\u5230 8)\uff0c\u591a\u7528\u6237\u7684MIMO, \u4ee5\u53ca\u66f4\u9ad8\u9636\u7684\u8c03\u5236(modulation)(\u8fbe\u5230 256QAM)\u3002 30\u7c73<\/td><\/tr><\/tbody><\/table>\n\n\n\n<h3 class=\"wp-block-heading\">\u4e3a\u4ec0\u4e485G\u4fe1\u53f7\u7684\u7a7f\u5899\u6548\u679c\u6bd42.4G\u4fe1\u53f7\u5dee<\/h3>\n\n\n\n<p>2.4G\u533a\u522b\uff1a\u53cc\u9891\u8def\u7531\u5668\u662f\u6307\u540c\u65f6\u5de5\u4f5c\u57282.4GHz\u548c5.0GHz\u9891\u6bb5\u7684\u65e0\u7ebf\u8def\u7531\u5668\u3002\u5c31\u662f2.4G\u4f20\u8f93\u6bd4\u8f83\u8fdc\uff0c\u6ce2\u6bb5\u9891\u7387\u6bd4\u8f83\u77ed\uff0c\u6240\u4ee5\u5728\u5f88\u8fdc\u7684\u5730\u65b9\u90fd\u80fd\u63a5\u6536\u5230\uff0c\u4f46\u662f\u7f3a\u70b9\u5c31\u662f\u4e0d\u7a33\u5b9a\uff0c\u5bb9\u6613\u88ab\u5e72\u6270\uff0c\u5373\u4f7f\u770b\u5230\u662f\u6ee1\u683c\uff0c\u53ef\u80fd\u4e5f\u7f51\u7edc\u5f88\u6162\u3002<\/p>\n\n\n\n<p>5G\u533a\u522b\uff1a\u76f8\u6bd4\u4e8e2.4G\u5355\u9891\u6bb5\u65e0\u7ebf\u8def\u7531\u5668\uff0c\u5b83\u5177\u6709\u66f4\u9ad8\u7684\u65e0\u7ebf\u4f20\u8f93\u901f\u7387\uff0c\u5177\u5907\u66f4\u5f3a\u7684\u6297\u5e72\u6270\u6027\uff0c\u65e0\u7ebf\u4fe1\u53f7\u66f4\u5f3a\uff0c\u7a33\u5b9a\u6027\u66f4\u9ad8\uff0c\u4e0d\u5bb9\u6613\u6389\u7ebf\u3002\u7f3a\u70b9\u5c31\u662f\u6ce2\u6bb5\u957f\uff0c \u4f20\u8f93\u8ddd\u79bb\u77ed\uff0c\u7a7f\u900f\u6027\u5dee\u3002\u4f46\u662f\u5728\u6709\u6548\u8ddd\u79bb\u5185\u4f1a\u5f88\u7a33\u5b9a\u3002<\/p>\n\n\n\n<p>\u539f\u6587\u5730\u5740\uff1a<a href=\"https:\/\/blog.csdn.net\/xtggbmdk\/article\/details\/89158018\">https:\/\/blog.csdn.net\/xtggbmdk\/article\/details\/89158018<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>WIFI\u65e0\u7ebf\u534f\u8bae802.11a\/b\/g\/n\/ac\u7684\u6f14\u53d8\u4ee5\u53ca\u533a\u522b;<br \/>\nWIFI 2.4G\uff0c5G\u9891\u6bb5\u4fe1\u53f7\u533a\u522b;<\/p>\n","protected":false},"author":1,"featured_media":765,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[79,63],"tags":[70],"_links":{"self":[{"href":"http:\/\/iqotom.com\/index.php?rest_route=\/wp\/v2\/posts\/763"}],"collection":[{"href":"http:\/\/iqotom.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/iqotom.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/iqotom.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/iqotom.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=763"}],"version-history":[{"count":9,"href":"http:\/\/iqotom.com\/index.php?rest_route=\/wp\/v2\/posts\/763\/revisions"}],"predecessor-version":[{"id":1129,"href":"http:\/\/iqotom.com\/index.php?rest_route=\/wp\/v2\/posts\/763\/revisions\/1129"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/iqotom.com\/index.php?rest_route=\/wp\/v2\/media\/765"}],"wp:attachment":[{"href":"http:\/\/iqotom.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=763"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/iqotom.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=763"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/iqotom.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=763"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}