{"id":3021,"date":"2020-03-31T01:30:21","date_gmt":"2020-03-31T01:30:21","guid":{"rendered":""},"modified":"2020-03-31T09:30:47","modified_gmt":"2020-03-31T01:30:47","slug":"%e5%bd%b1%e5%93%8d%e7%94%b5%e5%ad%90%e7%94%b5%e8%b7%af%e7%9a%84%e5%90%84%e7%a7%8d%e7%b1%bb%e5%9e%8b%e5%99%aa%e5%a3%b0%e6%80%bb%e7%bb%93","status":"publish","type":"post","link":"http:\/\/www.szryc.com\/?p=3021","title":{"rendered":"\u5f71\u54cd\u7535\u5b50\u7535\u8def\u7684\u5404\u79cd\u7c7b\u578b\u566a\u58f0\u603b\u7ed3"},"content":{"rendered":"

\n\t\u566a\u58f0\u548cTDMA<\/u>\u566a\u58f0<\/h2>\n

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\n\t <\/div>\n

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\n\t\"\u5f71\u54cd\u7535\u5b50\u7535\u8def\u7684\u5404\u79cd\u7c7b\u578b\u566a\u58f0\u603b\u7ed3\"<\/p>\n

\n\t\u56fe4 RF\u80fd\u91cf\u8026\u5408\u5230\u97f3\u9891\u7535\u8def\u4e2d<\/p>\n

\n\t\u5f53\u5b58\u5728\u957f\u7684\u8d70\u7ebf\u8fde\u63a5\u653e\u5927\u5668\u8f93\u51fa\u81f3\u5587\u53ed\u65f6\uff0c\u6f5c\u5728\u7684RF\u80fd\u91cf\u8026\u5408\u5230\u97f3\u9891\u7535\u8def\u7684\u4e8b\u4ef6\u6700\u6709\u53ef\u80fd\u53d1\u751f\uff0c\u6b64\u65f6\u8d70\u7ebf\u7c7b\u4f3c\u4e8e\u5929\u7ebf\u7684\u4f5c\u7528\u3002\u597d\u7684\u5e03\u5c40\u5e94\u8be5\u80fd\u9632\u6b62RF\u80fd\u91cf\u8026\u5408\u81f3\u97f3\u9891\u548c\u7535\u6e90\u8d70\u7ebf\uff0c\u5728\u7535\u8bdd\u4e2d\u8fd9\u4e9b\u8d70\u7ebf\u8fde\u63a5\u57fa\u5e26\u90e8\u5206\u6216\u8005\u97f3\u9891\u7535\u8def\u3002\u8fd9\u4e9b\u5b50\u7cfb\u7edf\u7684\u8bbe\u8ba1\u5fc5\u987b\u80fd\u591f\u963b\u6b62\u6216\u8005\u5bf9\u5730\u65c1\u8defRF\u4fe1\u53f7\uff0c \u4f7f\u5f97\u8be5\u4fe1\u53f7\u4e0d\u4f1a\u4f20\u81f3\u534a\u5bfc\u4f53\u6709\u6e90\u97f3\u9891\u5668\u4ef6\u7684\u7ed3\u70b9\u3002\u80fd\u591f\u901a\u8fc7\u4e0d\u540c\u7684\u8def\u5f84\u5c06RF\u80fd\u91cf\u4eceRF\u7535\u8def\u4f20\u81f3\u97f3\u9891\u7535\u8def\u4e2d\uff1a<\/p>\n

\n\t* \u4ece\u5929\u7ebf\u8f90\u5c04\u5230\u97f3\u9891\u6216\u8005\u7535\u6e90\u5668\u4ef6\uff0c \u6216\u8005\u8fde\u63a5\u5b83\u4eec\u7684\u8d70\u7ebf\u6216\u5668\u4ef6\u3002<\/p>\n

\n\t* \u4eceRF\u5668\u4ef6\u7ecf\u8d70\u7ebf\u5230\u97f3\u9891\u5668\u4ef6\u7684\u4f20\u5bfc\u3002<\/p>\n

\n\t* \u7ecf\u5730\u7ebf\u81f3\u97f3\u9891\u5b50\u7cfb\u7edf\u7684\u4f20\u5bfc\u3002<\/p>\n

\n\t* \u884c\u7ebf\u4e4b\u95f4\u7684\u7ebf\u5230\u7ebf\u7684\u8026\u5408\uff0c \u6216\u8005\u4ece\u884c\u7ebf\u81f3\u540c\u4e00\u5c42\u6216\u76f8\u90bb\u5c42\u7684\u5730\u7aef\u8026\u5408\u3002<\/p>\n

\n\t* \u4ece\u884c\u7ebf\u5230\u5668\u4ef6\u6216\u8005\u5668\u4ef6\u5230\u5668\u4ef6\u7684\u8026\u5408\u3002<\/p>\n

\n\t\u9884\u9632\u65b9\u6cd5\u5305\u62ec\u5c4f\u853d\u3001\u5730\u7ebf\u8bbe\u8ba1\u548c\u4ed4\u7ec6\u7684\u6574\u4f53\u5e03\u5c40\u5b9e\u8df5\u3002\u4e00\u4e9b\u9884\u9632\u65b9\u6cd5\u5982\u4e0b\uff1a<\/p>\n

\n\t* \u5c4f\u853d\u97f3\u9891\u90e8\u5206\u548c\u4e0e\u4e4b\u5173\u8054\u7684\u7535\u6e90\u7ba1\u7406<\/u>\u548c\u57fa\u5e26\u90e8\u5206\u6765\u9694\u79bb\u6742\u6563RF\u4fe1\u53f7\u3002\u5c4f\u853dRF\u90e8\u5206\u5c06\u6742\u6563\u80fd\u91cf\u964d\u5230\u6700\u4f4e\u3002<\/p>\n

\n\t* \u5c06\u5c4f\u853d\u63a5\u81f3\u5927\u5730\u4f7f\u5927\u52a8\u6001\u7535\u6d41\u65e0\u963b\u788d\u6d41\u5165\u3002<\/p>\n

\n\t* \u5c06\u97f3\u9891\u7535\u8def\u90e8\u5206\u4e0b\u9762\u5927\u5757\u7684\u8fde\u7eed\u97f3\u9891\u63a5\u5730\u548c\u8109\u51b2\u7535\u6d41\u9694\u79bb\u5f00\u6765\u3002<\/p>\n

\n\t* \u4e0d\u5141\u8bb8\u540c\u4e00\u5c42\u4e0a\u7684\u8d70\u7ebf\u5c06\u63a5\u5730\u7ebf\u5206\u5f00\u3002<\/p>\n

\n\t* \u5c06\u5668\u4ef6\u7ecf\u591a\u8fc7\u5b54<\/u>\u4e0e\u63a5\u5730\u5c42\u76f8\u8fde\u3002<\/p>\n

\n\t* \u4e0d\u8981\u5c06\u643a\u5e26\u7535\u6e90\u6216\u8005\u97f3\u9891\u4fe1\u53f7\u7684\u5e03\u7ebf\u4e0e\u90a3\u4e9b\u5305\u542bRF\u4fe1\u53f7\u6216\u5927\u52a8\u6001\u7535\u6e90\u7535\u6d41\u7684\u8d70\u7ebf\u5e73\u884c\u653e\u7f6e\u3002\u4f7f\u654f\u611f\u8d70\u7ebf\u548c\u6f5c\u5728\u5e72\u6270\u6e90\u7684\u95f4\u8ddd\u6700\u5927\u3002<\/p>\n

\n\t* \u5bf9\u4e8e\u5fc5\u987b\u4fdd\u6301\u5782\u76f4\u6216\uff0890’’\uff09\u7684\u8d70\u7ebf\u8bbe\u8ba1\uff0c\u8981\u5c06\u566a\u58f0\u8026\u5408\u964d\u5230\u6700\u4f4e\u3002<\/p>\n

\n\t* \u901a\u8fc7\u4e00\u4e2a\u5305\u542b\u8db3\u591f\u901a\u5b54<\/u>\u7684\u5730\u7ebf\u5f62\u6210\u6cd5\u62c9\u7b2c\u5c4f\u853d\u6765\u5c06\u5185\u5c42<\/u>\u7684\u97f3\u9891\u8d70\u7ebf\u4e0e\u975e\u97f3\u9891\u8d70\u7ebf\u9694\u79bb\u3002<\/p>\n

\n\t* \u4e0d\u8981\u5c06\u5305\u542bRF\u4fe1\u53f7\u6216\u8005\u52a8\u6001\u76f4\u6d41\u7535\u6d41\u7684\u8d70\u7ebf\u76f4\u63a5\u653e\u7f6e\u5728\u97f3\u9891\u5668\u4ef6\u7684\u4e0b\u9762\u3002<\/p>\n

\n\t\u5c06\u97f3\u9891\u53cd\u9988\u548c\u4fe1\u53f7\u8def\u5f84\u5668\u4ef6\u5c3d\u53ef\u80fd\u9760\u8fd1\u97f3\u9891\u653e\u5927\u5668\u653e\u7f6e\uff0c\u5c06\u5668\u4ef6\u4e0eRF\u80fd\u91cf\u6e90\u9694\u79bb\u5f00\u6765\u3002<\/p>\n

\n\t\u5c3d\u7ba1\u52aa\u529b\u505a\u4e86\u5f88\u591a\u9884\u9632\u63aa\u65bd\uff0c\u4f46\u662f\u4ecd\u7136\u4f1a\u6709\u4e00\u4e9bRF\u80fd\u91cf\u4f1a\u8026\u5408\u5230\u97f3\u9891\u8d70\u7ebf\u4e0a\u3002\u8fd8\u5229\u7528\u5bf9\u5730\u65c1\u8def\u7535\u5bb9<\/u>\u5f62\u6210\u7684\u5355\u6781\u70b9\u4f4e\u901a\u6ee4\u6ce2\u5668<\/u>\u8fdb\u4e00\u6b65\u8870\u51cf\u4f20\u5bfc\u81f3\u97f3\u9891\u653e\u5927\u5668\u534a\u5bfc\u4f53\u7ed3\u70b9\u7684RF\u80fd\u91cf\u3002\u5fc5\u987b\u4f7f\u7528\u5c0f\u5bb9\u91cf\u7684\u7535\u5bb9\u5bf9RF\u80fd\u91cf\u8fdb\u884c\u65c1\u8def\uff0c\u8fd9\u6837\u624d\u4e0d\u4f1a\u5f71\u54cd\u97f3\u9891\u4fe1\u53f7\u3002\u56e0\u4e3aGSM\u8702\u7a9d\u7535\u8bdd\u7684\u9891\u5e26\u8303\u56f4\u5927\u7ea6\u5728900MHz\u81f31800MHz\u4e4b\u95f4\uff0c\u6700\u4f73\u7535\u5bb9\u7684\u9009\u53d6\u81ea\u7136\u662f\u4e0a\u8ff0\u9891\u7387\u4e2d\u80fd\u591f\u4ea7\u751f\u8c10\u632f\u7684;10pF\u81f339pF\u7684\u5178\u578b\u7535\u5bb9\u503c\u5bf9\u97f3\u9891\u4fe1\u53f7\u7684\u5f71\u54cd\u53ef\u5ffd\u7565\u3002\u5728\u6bcf\u4e2a\u97f3\u9891\u653e\u5927\u5668\u8f93\u5165\u7aef\u3001\u8f93\u51fa\u7aef\u6216\u8005\u5bf9RF\u80fd\u91cf\u654f\u611f\u7684\u7535\u6e90\u5f15\u811a\u5904\uff0c\u5e94\u8be5\u4f7f\u7528\u5404\u81ea\u4e0d\u540c\u7684\u7535\u5bb9\u5bf9\u4ea7\u751f\u7684RF\u80fd\u91cf\u8fdb\u884c\u65c1\u8def\u3002\u5982\u679c\u9700\u8981\u8fdb\u4e00\u6b65\u7684\u9694\u79bb\uff0c\u5e94\u589e\u52a0\u4e00\u4e2a\u7535\u611f<\/u>\uff08\u6216\u8005\u94c1\u6c27\u4f53\u78c1\u73e0<\/u>;\u94c1\u6c27\u4f53\u78c1\u73e0\u662f\u7535\u611f\u548c\u7535\u963b\u7684\u7ec4\u5408\uff09\u6765\u5f62\u6210\u4e00\u4e2a\u4e24\u6781\u70b9\u4f4e\u901a\u6ee4\u6ce2\u5668\uff0c\u5668\u4ef6\u653e\u7f6e\u7684\u7269\u7406\u4f4d\u7f6e4\u8981\u5c3d\u53ef\u80fd\u7684\u9760\u8fd1\u653e\u5927\u5668\u8f93\u51fa\u7aef\u3002\u56fe5\u6240\u793a\u4e3aLM4845\u5355\u901a\u9053\u8f93\u51fa\u7684\u5b9e\u9645\u5e94\u7528\u3002\u5ba2\u6237\u901a\u8fc7\u5b9e\u73b0-3dB\u622a\u6b62\u9891\u7387\u4e3a1MHz\u7684\u4e24\u6781\u70b9\u4f4e\u901a\u6ee4\u6ce2\u5668\uff0c\u53ef\u4ee5\u4f53\u9a8c\u5355\u901a\u9053\u5587\u53ed\u7684\u97f3\u9891\u8702\u97f3\uff0c\u5176\u8fdc\u8d85\u51fa\u4e86\u97f3\u9891\u8303\u56f4\u800c\u53c8\u8fdc\u4f4e\u4e8eGSM\u9891\u7387\u7684\u9891\u5e26\u8303\u56f4\u3002\u97f3\u9891\u8702\u97f3\u88ab\u8870\u51cf\u4e8630dB\uff0c\u5c5e\u4e8e\u542c\u529b\u53ef\u63a5\u6536\u6c34\u5e73\u3002<\/p>\n

\n\t\"\u5f71\u54cd\u7535\u5b50\u7535\u8def\u7684\u5404\u79cd\u7c7b\u578b\u566a\u58f0\u603b\u7ed3\"<\/p>\n

\n\t\u56fe5 \u9694\u79bb\u653e\u5927\u5668<\/u>\u8f93\u51fa\u7684\u5916\u7f6e\u4e24\u6781\u70b9\u4f4e\u901a\u6ee4\u6ce2\u5668<\/p>\n

\n\t\u867d\u7136GSM\u8702\u7a9d\u7535\u8bdd\u5236\u9020\u5546\u5728\u4f7f\u7528LM4845\u65f6\u4f1a\u9047\u5230TDMA\u566a\u58f0\u7684\u96be\u9898\uff0c\u5176\u4ed6\u7684\u5ba2\u6237\u5219\u4e0d\u4f1a\u3002\u5728\u5bfb\u627e\u5e76\u5904\u7406\u5ba2\u6237\u7535\u8def\u7684\u6545\u969c\u4e4b\u540e\uff0c\u53ef\u4ee5\u786e\u5b9a\u8f83\u5dee\u7684\u5668\u4ef6\u5e03\u5c40\u548c\u8f83\u5dee\u7684\u7535\u8def\u5e03\u7ebf\u662f\u4ea7\u751f\u97f3\u9891\u8702\u97f3\u7684\u4e3b\u8981\u539f\u56e0\u3002\u4e3a\u4e86\u5e2e\u52a9\u7cfb\u7edf\u8bbe\u8ba1\u5e08\u5c06\u566a\u58f0\u654f\u611f\u5ea6\u964d\u5230\u6700\u4f4e\uff0c\u91cd\u65b0\u8bbe\u8ba1LM4845\u4e3a\u5dee\u5206\u7684\u5355\u7aef\u8f93\u5165\u7535\u8def\uff0c\u653e\u5927\u5668\u8f93\u51fa\u7aef\u662f\u4e13\u6709\u7684RF\u6291\u5236\u7535\u8def\u3002\u8fd9\u6b3e\u6539\u8fdb\u7684\u5668\u4ef6\u5c31\u662fLM4946\u3002\u56fe6\u6240\u793a\u4e3aLM4845\u548cLM4946\u5728\u76f8\u540c\u60c5\u51b5\u4e0b\u7684\u6bd4\u8f83\u3002\u5982\u679c\u6ca1\u6709RF\u6291\u5236\u7535\u8def\uff0c\u901a\u8fc7217Hz\u7684 TDMA\u8109\u51b2\u5728RF\u8c03\u5236\u5305\u7edc\u4e0a\u7684\u91cd\u590d\u643a\u8f7d\uff0cRF\u80fd\u91cf\u53ef\u4ee5\u4f20\u64ad\u5230LM4845\u5e76\u8026\u5408\u5230\u97f3\u9891\u8def\u5f84\u4e2d\u3002\u5c3d\u7ba1LM4946\u4e2d\u5b58\u5728\u540c\u6837\u7684217Hz TDMA\u91cd\u590d\u8109\u51b2\uff0cRF\u6291\u5236\u7535\u8def\u53ef\u4ee5\u5c06RF\u80fd\u91cf\u7684\u8870\u51cf\u4ece20dB\u589e\u5927\u81f3\u523030dB\u3002\u56fe6\u4e5f\u7ed9\u51fa\u4e86\u5728LM4946\u4e2d\u5f97\u5230\u5145\u5206\u8870\u51cf\u7684\u8c03\u5236\u5305\u7edc\u3002<\/p>\n

\n\t\"\u5f71\u54cd\u7535\u5b50\u7535\u8def\u7684\u5404\u79cd\u7c7b\u578b\u566a\u58f0\u603b\u7ed3\"<\/p>\n

\n\t\u56fe6 \u6d4b\u91cf<\/u>\u5f97\u5230\u7684TDMA\u566a\u58f0<\/p>\n

\n\t\u5f53\u524d\uff0c\u53ea\u6709LM4884\u548cLM4946\u5305\u542b\u4e86\u4e13\u6709\u7684RF\u6291\u5236\u7535\u8def\uff0c\u5e94\u7528\u8be5\u6280\u672f\u7684\u66f4\u5148\u8fdb\u7684\u5176\u4ed6\u4ea7\u54c1\u6b63\u5728\u5f00\u53d1\u4e4b\u4e2d\u3002<\/p>\n

\n\t\u7ed3\u8bed<\/h2>\n

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