沙特阿拉伯现在用第几代移动通信 is-95系统属于第几代移动通信系统
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2\u3001\u7b2c\u4e00\u4ee3\u9891\u5206\u591a\u5740\u3002FDMA \uff08Frequency Division Multiple Access\uff0fAddress\uff09\uff0c\u6709\u8bb8\u591a\u4e0d\u540c\u6280\u672f\u53ef\u4ee5\u7528\u6765\u5b9e\u73b0\u4fe1\u9053\u5171\u4eab\u3002\u628a\u4fe1\u9053\u9891\u5e26\u5206\u5272\u4e3a\u82e5\u5e72\u66f4\u7a84\u7684\u4e92\u4e0d\u76f8\u4ea4\u7684\u9891\u5e26\uff08\u79f0\u4e3a\u5b50\u9891\u5e26\uff09\uff0c\u628a\u6bcf\u4e2a\u5b50\u9891\u5e26\u5206\u7ed9\u4e00\u4e2a\u7528\u6237\u4e13\u7528\uff08\u79f0\u4e3a\u5730\u5740\uff09\u3002\u8fd9\u79cd\u6280\u672f\u88ab\u79f0\u4e3a\u201c\u9891\u5206\u591a\u5740\u201d\u6280\u672f\u3002\u9891\u5206\u590d\u7528\uff08FDM\uff09\u662f\u6307\u8f7d\u6ce2\u5e26\u5bbd\u88ab\u5212\u5206\u4e3a\u591a\u79cd\u4e0d\u540c\u9891\u5e26\u7684\u5b50\u4fe1\u9053\uff0c\u6bcf\u4e2a\u5b50\u4fe1\u9053\u53ef\u4ee5\u5e76\u884c\u4f20\u9001\u4e00\u8def\u4fe1\u53f7\u7684\u4e00\u79cd\u6280\u672f\u3002\u9891\u5206\u590d\u7528\u6280\u672f\u4e0b\uff0c\u591a\u4e2a\u7528\u6237\u53ef\u4ee5\u5171\u4eab\u4e00\u4e2a\u7269\u7406\u901a\u4fe1\u4fe1\u9053\uff0c\u8be5\u8fc7\u7a0b\u5373\u4e3a\u9891\u5206\u591a\u5740\u590d\u7528\uff08FDMA\uff09\u3002FDMA \u6a21\u62df\u4f20\u8f93\u662f\u6548\u7387\u6700\u4f4e\u7684\u7f51\u7edc\uff0c\u8fd9\u4e3b\u8981\u4f53\u73b0\u5728\u6a21\u62df\u4fe1\u9053\u6bcf\u6b21\u53ea\u80fd\u4f9b\u4e00\u4e2a\u7528\u6237\u4f7f\u7528\uff0c\u4f7f\u5f97\u5e26\u5bbd\u5f97\u4e0d\u5230\u5145\u5206\u5229\u7528\u3002
3\u3001\u7b2c\u4e09\u4ee3\u7801\u5206\u591a\u5740\u3002CDMA\u662f\u7801\u5206\u591a\u5740\u7684\u82f1\u6587\u7f29\u5199(CodeDivisionMultipleAccess)\uff0c\u5b83\u662f\u5728\u6570\u5b57\u6280\u672f\u7684\u5206\u652f--\u6269\u9891\u901a\u4fe1\u6280\u672f\u4e0a\u53d1\u5c55\u8d77\u6765\u7684\u4e00\u79cd\u5d2d\u65b0\u800c\u6210\u719f\u7684\u65e0\u7ebf\u901a\u4fe1\u6280\u672f\u3002CDMA\u6280\u672f\u7684\u539f\u7406\u662f\u57fa\u4e8e\u6269\u9891\u6280\u672f\uff0c\u5373\u5c06\u9700\u4f20\u9001\u7684\u5177\u6709\u4e00\u5b9a\u4fe1\u53f7\u5e26\u5bbd\u4fe1\u606f\u6570\u636e\uff0c\u7528\u4e00\u4e2a\u5e26\u5bbd\u8fdc\u5927\u4e8e\u4fe1\u53f7\u5e26\u5bbd\u7684\u9ad8\u901f\u4f2a\u968f\u673a\u7801\u8fdb\u884c\u8c03\u5236\uff0c\u4f7f\u539f\u6570\u636e\u4fe1\u53f7\u7684\u5e26\u5bbd\u88ab\u6269\u5c55\uff0c\u518d\u7ecf\u8f7d\u6ce2\u8c03\u5236\u5e76\u53d1\u9001\u51fa\u53bb\u3002
4\u3001\u7a7a\u5206\u591a\u5740\u3002\u7a7a\u5206\u591a\u5740(Space Division Multiple Access, SDMA)\uff0c\u4e5f\u79f0\u4e3a\u591a\u5149\u675f\u9891\u7387\u590d\u7528\uff0c\u901a\u8fc7\u6807\u8bb0\u4e0d\u540c\u65b9\u4f4d\u76f8\u540c\u9891\u7387\u7684\u5929\u7ebf\u5149\u675f\u6765\u8fdb\u884c\u9891\u7387\u7684\u590d\u7528\u30025.4G\u662f\u7b2c\u56db\u4ee3\u79fb\u52a8\u901a\u4fe1\u53ca\u5176\u6280\u672f\u7684\u7b80\u79f0\uff0c\u662f\u96c63G\u4e0eWLAN\u4e8e\u4e00\u4f53\u5e76\u80fd\u591f\u4f20\u8f93\u9ad8\u8d28\u91cf\u89c6\u9891\u56fe\u8c61\u7684\u6280\u672f\u4ea7\u54c1\uff0e4G\u7cfb\u7edf\u80fd\u591f\u4ee5100Mbps\u7684\u901f\u5ea6\u4e0b\u8f7d\uff0c\u4e0a\u4f20\u7684\u901f\u5ea6\u4e5f\u80fd\u8fbe\u523020Mbps\uff0c\u5e76\u80fd\u591f\u6ee1\u8db3\u51e0\u4e4e\u6240\u6709\u7528\u6237\u5bf9\u4e8e\u65e0\u7ebf\u670d\u52a1\u7684\u8981\u6c42\uff0e4G\u624b\u673a\u4f20\u9012\u4fe1\u606f\u4f9d\u9760\u7684\u662f\u7535\u78c1\u6ce2\u6765\u5b9e\u73b0\u7684\u3002
IS-95\u662f\u7b2c\u4e8c\u4ee3\u79fb\u52a8\u901a\u4fe1\u6280\u672f\u3002
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