{"id":297312,"date":"2023-12-09T06:45:19","date_gmt":"2023-12-08T22:45:19","guid":{"rendered":"https:\/\/www.idc.net\/help\/297312\/"},"modified":"2023-12-09T06:45:19","modified_gmt":"2023-12-08T22:45:19","slug":"%e9%ab%98%e6%89%8b%e6%95%99%e4%bd%a0lmds%e6%8e%a5%e5%85%a5%e6%8a%80%e6%9c%af%e4%bc%98%e7%bc%ba%e7%82%b9%e6%af%94%e8%be%83","status":"publish","type":"post","link":"https:\/\/idc.net\/help\/297312\/","title":{"rendered":"\u9ad8\u624b\u6559\u4f60LMDS\u63a5\u5165\u6280\u672f\u4f18\u7f3a\u70b9\u6bd4\u8f83"},"content":{"rendered":"

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\u5bbd\u5e26\u65e0\u7ebf\u63a5\u5165\u7f51\u6280\u672f<\/strong><\/p>\n

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\u5728LMDS\u63a5\u5165\u6280\u672f\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u8981\u8fdb\u5165\u548c\u5360\u9886\u63a5\u5165\u5e02\u573a\uff0c\u91c7\u7528\u5bbd\u5e26\u65e0\u7ebf\u63a5\u5165\u6280\u672f\u662f\u4e00\u4e2a\u6bd4\u8f83\u5408\u9002\u7684\u5207\u5165\u70b9\u3002\u76ee\u524d\u4e3b\u8981\u6709\u56db\u79cd\u5bbd\u5e26\u65e0\u7ebf\u63a5\u5165\u6280\u672f\uff1aMMDS\u3001LMDS\u63a5\u5165\u6280\u672f\u3001\u536b\u661f\u901a\u4fe1\u63a5\u5165\u6280\u672f\u548c\u4e0d\u53ef\u89c1\u5149\u7ea4\u65e0\u7ebf\u7cfb\u7edf\u3002<\/p>\n

MMDS\u63a5\u5165\u6280\u672f<\/strong><\/p>\n

MMDS(MultichannelMicrowaveDistributionSystem)\u591a\u8def\u5fae\u6ce2\u5206\u914d\u7cfb\u7edf\u5df2\u6210\u4e3a\u6709\u7ebf\u7535\u89c6\u7cfb\u7edf\u7684\u91cd\u8981\u7ec4\u6210\u90e8\u5206\uff0cMMDS\u662f\u4ee5\u4f20\u9001\u7535\u89c6\u8282\u76ee\u4e3a\u76ee\u7684\uff0c\u6a21\u62dfMMDS\u53ea\u80fd\u4f208\u5957\u8282\u76ee\uff0c\u968f\u7740\u6570\u5b57\u56fe\u50cf\/\u58f0\u97f3\u6280\u672f\u548c\u5bf9\u9ad8\u901f\u6570\u636e\u7684\u793e\u4f1a\u9700\u6c42\u7684\u51fa\u73b0\uff0c\u6a21\u62dfMMDS\u6b63\u5728\u5411\u6570\u5b57MMDS\u8fc7\u6e21\u3002\u7f8e\u56fd\u7684\u6570\u5b57MMDS\u7531\u4e8e\u670931\u4e2a\u9891\u70b9\uff0c\u53ef\u4ee5\u4f20\u9001MPEG-2\u538b\u7f29\u7684\u4e0a\u767e\u5957\u7535\u89c6\u8282\u76ee\u548c\u58f0\u97f3\u5e7f\u64ad\u8282\u76ee\u3002\u5b83\u8fd8\u53ef\u4ee5\u5728\u6b64\u57fa\u7840\u4e0a\u589e\u52a0\u5355\u5411\u6216\u53cc\u5411\u7684\u9ad8\u901f\u82f1\u7279\u7f51\u4e1a\u52a1\u3002<\/p>\n

MMDS\u7684\u9891\u7387\u662f2.5\uff5e2.7MHz\u3002\u5b83\u7684\u4f18\u70b9\u662f\uff1a\u96e8\u8870\u53ef\u4ee5\u5ffd\u7565\u4e0d\u8ba1\uff1b\u5668\u4ef6\u6210\u719f\uff1b\u8bbe\u5907\u6210\u672c\u4f4e\u3002\u5b83\u7684\u4e0d\u8db3\u662f\u5e26\u5bbd\u6709\u9650\uff0c\u4ec5200MHz\u3002\u8bb8\u591a\u901a\u4fe1\u516c\u53f8\u770b\u4e2d\u7528LMDS\u6280\u672f\u6765\u4f5c\u4e3a\u6570\u636e\u3001\u8bdd\u97f3\u548c\u89c6\u9891\u7684\u53cc\u5411\u65e0\u7ebf\u9ad8\u901f\u63a5\u5165\u7f51\u3002\u4f46\u7531\u4e8eMMDS\u7684\u6210\u672c\u8fdc\u4f4e\u4e8eLMDS\uff0c\u6280\u672f\u4e5f\u66f4\u6210\u719f\uff0c\u56e0\u800c\u901a\u4fe1\u516c\u53f8\u613f\u610f\u4eceMMDS\u5165\u624b\u3002\u5b83\u4eec\u6b63\u5728\u901a\u8fc7\u6570\u5b57MMDS\u5f00\u5c55\u65e0\u7ebf\u53cc\u5411\u9ad8\u901f\u6570\u636e\u4e1a\u52a1\uff0c\u4e3b\u8981\u662f\u53cc\u5411\u65e0\u7ebf\u9ad8\u901f\u82f1\u7279\u7f51\u4e1a\u52a1\u3002<\/p>\n

\u6700\u8fd1\uff0c\u6211\u56fd\u6709\u7684\u5927\u57ce\u5e02\u5df2\u7ecf\u6210\u529f\u5730\u5efa\u6210\u4e86\u6570\u5b57MMDS\u7cfb\u7edf\uff0c\u5e76\u4e14\u5df2\u7ecf\u6295\u5165\u4f7f\u7528\u3002\u4e0d\u4ec5\u4f20\u9001\u591a\u5957\u7535\u89c6\u8282\u76ee\uff0c\u540c\u65f6\u8fd8\u5c06\u4f20\u9001\u9ad8\u901f\u6570\u636e\uff0c\u6210\u4e3a\u6211\u56fd\u6570\u5b57MMDS\u5e94\u7528\u7684\u5148\u9a71\u3002\u6570\u5b57MMDS\u4e0d\u5e94\u8be5\u5355\u7eaf\u4e3a\u4e86\u591a\u4f20\u7535\u89c6\u8282\u76ee\uff0c\u800c\u5e94\u8be5\u5145\u5206\u53d1\u6325\u6570\u5b57\u7cfb\u7edf\u7684\u529f\u80fd\uff0c\u540c\u65f6\u4f20\u9001\u9ad8\u901f\u6570\u636e\uff0c\u5f00\u5c55\u589e\u503c\u4e1a\u52a1\u3002\u9ad8\u901f\u6570\u636e\u4e1a\u52a1\u80fd\u4fc3\u8fdb\u5730\u533a\u7ecf\u6d4e\u7684\u53d1\u5c55\uff0c\u540c\u65f6\u4e5f\u4e3aMMDS\u7ecf\u8425\u8005\u5e26\u6765\u66f4\u5927\u7684\u7ecf\u6d4e\u6548\u76ca\u3002\u56e0\u4e3a\u6570\u636e\u4e1a\u52a1\u7684\u6536\u5165\u8fdc\u9ad8\u4e8e\u7535\u89c6\u4e1a\u52a1\u7684\u6536\u5165\u3002<\/p>\n

LMDS\u63a5\u5165\u6280\u672f<\/strong><\/p>\n

\u672c\u5730\u591a\u70b9\u5206\u914d\u4e1a\u52a1LMDS\u63a5\u5165\u6280\u672fLocalMultipointDistributionService)\u5de5\u4f5c\u572820~40GHz\u9891\u5e26\u4e0a\uff0c\u4f20\u8f93\u5bb9\u91cf\u53ef\u4e0e\u5149\u7ea4\u6bd4\u62df\uff0c\u540c\u65f6\u53c8\u517c\u6709\u65e0\u7ebf\u901a\u4fe1\u7ecf\u6d4e\u548c\u6613\u4e8e\u5b9e\u65bd\u7b49\u4f18\u70b9\u3002LMDS\u63a5\u5165\u6280\u672f\u57fa\u4e8eMPEG\u6280\u672f\uff0c\u4ece\u5fae\u6ce2\u89c6\u9891\u5206\u5e03\u7cfb\u7edf(MicrowaveVideoDistributionSystem\uff0cMVDS)\u53d1\u5c55\u800c\u6765\u3002<\/p>\n

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LMDS\u63a5\u5165\u6280\u672f\u7684\u7279\u70b9\u662f\uff1a
<\/strong>\u25c6LMDS\u7684\u5e26\u5bbd\u53ef\u4e0e\u5149\u7ea4\u76f8\u6bd4\u62df\uff0c\u5b9e\u73b0\u65e0\u7ebf\u201c\u5149\u7ea4\u201d\u5230\u697c\uff0c\u53ef\u7528\u9891\u5e26\u81f3\u5c111GHz\u3002\u4e0e\u5176\u4ed6\u63a5\u5165\u6280\u672f\u76f8\u6bd4\uff0cLMDS\u63a5\u5165\u6280\u672f\u662f***\u4e00\u516c\u91cc\u5149\u7ea4\u7684\u7075\u6d3b\u66ff\u4ee3\u6280\u672f\u3002
\u25c6\u5149\u7ea4\u4f20\u8f93\u901f\u7387\u9ad8\u8fbeGb\/s\uff0c\u800cLMDS\u4f20\u8f93\u901f\u7387\u53ef\u8fbe155Mb\/s\uff0c\u7a33\u5c45\u7b2c\u4e8c\u3002
\u25c6LMDS\u53ef\u652f\u6301\u6240\u6709\u4e3b\u8981\u7684\u8bdd\u97f3\u548c\u6570\u636e\u4f20\u8f93\u6807\u51c6\uff0c\u5982ATM\u3001TCP\/IP\u3001MPEG-2\u7b49\u3002
\u25c6LMDS\u5de5\u4f5c\u5728\u6beb\u7c73\u6ce2\u6ce2\u6bb5\u300120~40GHz\u9891\u7387\u4e0a\uff0c\u88ab\u8bb8\u53ef\u7684\u9891\u7387\u662f24GHz\u300128GHz\u300131GHz\u300138GHz\uff0c\u5176\u4e2d\u4ee528GHz\u83b7\u5f97\u7684\u8bb8\u53ef\u8f83\u591a\uff0c\u8be5\u9891\u6bb5\u5177\u6709\u8f83\u5bbd\u677e\u7684\u9891\u8c31\u8303\u56f4\uff0c\u6700\u6709\u6f5c\u529b\u63d0\u4f9b\u591a\u79cd\u4e1a\u52a1\u3002<\/p>\n

LMDS\u63a5\u5165\u6280\u672f\u7684\u7f3a\u70b9\u662f\uff1a<\/strong>
\u25c6<\/strong>\u4f20\u8f93\u8ddd\u79bb\u5f88\u77ed\uff0c\u4ec55\uff5e6Km\u5de6\u53f3\uff0c\u56e0\u800c\u4e0d\u5f97\u4e0d\u91c7\u7528\u591a\u4e2a\u5c0f\u8702\u7a9d\u7ed3\u6784\u6765\u8986\u76d6\u4e00\u4e2a\u57ce\u5e02\u3002
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