{"id":8690,"date":"2024-05-30T07:01:01","date_gmt":"2024-05-29T23:01:01","guid":{"rendered":""},"modified":"2024-05-30T07:01:01","modified_gmt":"2024-05-29T23:01:01","slug":"lte prs_\u7b80\u8ff04G\u7684\u5173\u952e\u6280\u672f","status":"publish","type":"post","link":"https:\/\/mushiming.com\/8690.html","title":{"rendered":"lte prs_\u7b80\u8ff04G\u7684\u5173\u952e\u6280\u672f"},"content":{"rendered":"<p><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" style=\"display: none;\"> \n <path stroke-linecap=\"round\" d=\"M5,0 0,2.5 5,5z\" id=\"raphael-marker-block\" style=\"-webkit-tap-highlight-color: rgba(0, 0, 0, 0);\"><\/path> \n<\/svg> <\/p>\n<h3>1. LTE\u4e2dVRB\u4e0ePRB\u7684\u6982\u5ff5<\/h3>\n<p>\u2003\u2003PRB\u8868\u793a\u7269\u7406\u8d44\u6e90\u5757\uff0cVRB\u8868\u793a\u865a\u62df\u8d44\u6e90\u5757\uff0ceNB\uff08\u6ce8\uff1a\u8868\u793a4G\u57fa\u7ad9\uff09\u4e00\u822c\u901a\u8fc7VRB\u7ed9UE\u6307\u793a\u8d44\u6e90\u4fe1\u606f\uff0c\u5177\u4f53\u7684\u7269\u7406\u8d44\u6e90\u6620\u5c04\u9700\u8981\u8ba1\u7b97\u901a\u8fc7VRB\u6620\u5c04\u5230\u5bf9\u5e94PRB\u540e\u624d\u80fd\u5f97\u5230\uff0c\u4e00\u822c\u96c6\u4e2d\u5f0f\u7684\u8868\u793a\u4e00\u4e2a\u7528\u6237\u7684\u8d44\u6e90\u5360\u7528\u8fde\u7eed\u7684RB\uff0c\u5206\u5e03\u5f0f\u8868\u793a\u4e00\u4e2a\u7528\u6237\u5360\u7528\u5e26\u5bbd\u4e0a\u4e0d\u8fde\u7eed\u7684RB\u8d44\u6e90\uff0c\u63d0\u9ad8\u7cfb\u7edf\u7684\u9891\u7387\u5206\u96c6\u589e\u76ca\uff0c\u63d0\u9ad8\u6297\u5e72\u6270\u80fd\u529b\u3002<\/p>\n<p>\u2003\u2003RB\u5206\u4e3aPRB\u548cVRB\u3002VRB\u4e3a\u865a\u62dfRB\uff0cmac\u5c42\u5728\u5206\u914d\u8d44\u6e90\u65f6\u6309VRB\u5206\u914d\uff0c\u7136\u540eVRB\u6620\u5c04\u5230PRB\u4e0a\u3002VRB\u6620\u5c04\u5230PRB\u6709\u4e24\u79cd\u65b9\u5f0f\uff0c\u5206\u5e03\u5f0f\u548c\u96c6\u4e2d\u5f0f\u3002\u96c6\u4e2d\u5f0fVRB\u548cPRB\u4e00\u4e00\u5bf9\u5e94\u3002\u5206\u5e03\u5f0f\u7684VRB\u6620\u5c04\u5230PRB\u9700\u8981\u5148\u4ea4\u7ec7\uff0c\u7136\u540e\u6309\u7167\u4e00\u5b9a\u7684\u89c4\u5219\u6620\u5c04\u5230\u5b9e\u9645\u7684PRB\u3002 \u5982\u679c\u96c6\u4e2d\u5f0f\u6620\u5c04\u7684\u8bdd\uff0c\u90a3\u4e48PRB\u5176\u5b9e\u5c31\u662fVRB\uff1b \u4f46\u5982\u679c\u662f\u5206\u5e03\u5f0f\u6620\u5c04\u7684\u8bdd\uff0c\u90a3\u4e48\u5fc5\u987b\u5148\u4ea4\u7ec7\uff0c\u6240\u4ee5\u624d\u6709\u4e0d\u540c\u7684\u540d\u79f0\uff0c\u5176\u5b9e\u5c31\u662f\u53ef\u80fdmac\u5c42\u5206\u914d\u7684\u662f\u7b2c10\u4e2aRB\uff0c\u5230\u4e86\u7269\u7406\u5c42\uff0c\u53ef\u80fd\u5c31\u662f\u7b2c\u4e00\u4e2aRB\u5c31\u4f20\u8f93\u4e86\uff0c\u8fd9\u6837\u53ef\u4ee5\u5c06\u5dee\u9519\u968f\u673a\u5316\u3002<\/p>\n<p>\u2003\u2003RB \u662f\u57fa\u4e8e\u4e00\u4e2aslot\uff080.5 ms\uff09\u5b9a\u4e49\u7684\uff0c\u4f46LTE \u4e2d\u8c03\u5ea6\u7684\u57fa\u672c\u65f6\u95f4\u5355\u4f4d\u662f\u4e00\u4e2a\u5b50\u5e27\uff081 ms\uff0c\u5bf9\u5e942\u4e2aslot\uff09\uff0c\u79f0\u4e3a\u4e00\u4e2aTTI\u3002\u4e00\u4e2aTTI \u5185\u7684\u8c03\u5ea6\uff08\u8c03\u5ea6PDSCH \u548cPUSCH \u8d44\u6e90\uff09\u7684\u6700\u5c0f\u5355\u4f4d\u5b9e\u9645\u4e0a\u7531\u540c\u4e00\u5b50\u5e27\u4e0a\u65f6\u95f4\u4e0a\u76f8\u8fde\u76842 \u4e2aRB\uff08\u6bcf\u4e2aslot \u5bf9\u5e94\u4e00\u4e2aRB\uff09\u7ec4\u6210\uff0c\u5e76\u88ab\u79f0\u4e3aRB pair\u3002LTE\u5b9e\u9645\u6700\u5c0f\u8c03\u5ea6\u65f6\u57df\u5355\u4f4d\u662fTTI\uff08Transmission Time Interval\uff09\u53731ms\uff0c\u5bf9\u5e942\u4e2aRB\u7ec4\u6210\u7684RB\u5bf9\uff08RB Pair\uff09\uff0c\u800cRB\u5728\u7269\u7406\u5c42\u548cMAC\u5c42\u5bf9\u5e94\u4e0d\u540c\u540d\u79f0\uff1a<\/p>\n<ul>\n<li>PRB = Physical RB (L1 \u7269\u7406\u5c42\u65f6\u9891\u8d44\u6e90\u6982\u5ff5)<\/li>\n<li>VRB = Virtual RB (L2 MAC\u5c42\u65f6\u9891\u8d44\u6e90\u6982\u5ff5)<\/li>\n<\/ul>\n<p>\u2003\u2003\u5177\u4f53\u6765\u8bf4\uff0cmac\u5c42\u5728\u5206\u914d\u8d44\u6e90\u7684\u65f6\u5019\uff0c\u662f\u6309VRB\u6765\u5206\u914d\u7684\uff0c\u7136\u540eVRB\u518d\u6620\u5c04\u5230PRB\u3002VRB\u6620\u5c04\u5230PRB\u4e5f\u6709\u4e24\u79cd\u6620\u5c04\u65b9\u5f0f\uff1a\u5206\u5e03\u5f0f\u548c\u96c6\u4e2d\u5f0f\u3002\u96c6\u4e2d\u5f0fVRB\u548cPRB\u662f\u4e00\u4e00\u5bf9\u5e94\u7684\u5173\u7cfb\uff0c\u5206\u5e03\u5f0f\u7684VRB \u6620\u5c04\u5230PRB\u9700\u8981\u5148\u4ea4\u7ec7\uff0c\u7136\u540e\u518d\u6309\u7167\u4e00\u5b9a\u7684\u89c4\u5219\u6620\u5c04\u5230\u5b9e\u9645\u7684PRB\u4f4d\u7f6e\u3002<\/p>\n<h3>2. LTE\u7269\u7406\u8d44\u6e90\u4e2d\u7684\u51e0\u4e2a\u6613\u6df7\u6dc6\u540d\u8bcd<\/h3>\n<p>1\u3001<strong>RE\uff08Resource Element\uff09\u8d44\u6e90\u5143\u7d20\uff0c\u6216\u8d44\u6e90\u7c92\u5b50<\/strong>\u3002\u662fLTE\u7269\u7406\u8d44\u6e90\u4e2d\u6700\u5c0f\u7684\u8d44\u6e90\u5355\u4f4d\uff1b\u5728\u65f6\u57df\u4e0a\u5360\u75281\u4e2aOFDM Symbol\uff081\/14 ms\uff09\uff0c\u9891\u57df\u4e0a\u4e3a1\u4e2a\u5b50\u8f7d\u6ce2\uff0815KHz\uff09\u3002\u5e73\u5e38\u6240\u8bf4\u7684\u7b26\u53f7\uff0c\u5373\u8c03\u5236\u540e\u7684\u6570\u636e\u7b26\u53f7\uff0c\u662f\u6620\u5c04\u5230RE\u4e0a\u7684\uff0c\u4e0eOFDM \u7b26\u53f7\u662f\u4e24\u4e2a\u4e0d\u540c\u7684\u6982\u5ff5\u3002<\/p>\n<p>2\u3001<strong>RB\uff08Resource Block\uff09\uff0c\u8d44\u6e90\u5757<\/strong>\u3002\u5728\u65f6\u57df\u4e0a\u4e3a1\u4e2atimeslot\uff080.5ms\uff0c\u534a\u4e2a\u5b50\u5e27\u65f6\u95f4\u957f\u5ea6\uff0c\u5e38\u89c4CP\u5bf9\u5e947\u4e2aOFDM \u7b26\u53f7\uff09\uff0c\u5728\u9891\u57df\u4e0a\u4e3a12\u4e2a\u5b50\u8f7d\u6ce2\uff08180KHz\uff09\u3002\u901a\u8fc7RB\u7684\u65f6\u9891\u57df\u4e0d\u96be\u770b\u51fa\uff0c1RB=72RE\uff08for Extended CP\uff09\/ 84RE\uff08for Normal CP\uff09\u3002RB\u6709\u4e24\u4e2a\u6982\u5ff5PRB\uff08\u7269\u7406\u8d44\u6e90\u5757\uff09\u548cVRB\uff08\u865a\u62df\u8d44\u6e90\u5757\uff09\u3002<\/p>\n<p>3\u3001<strong>SB\uff08Scheduling Block\uff09\uff0c\u8c03\u5ea6\u5757<\/strong>\u30021SB=2RB\u3002\u662f\u8c03\u5ea6\u7684\u6700\u5c0f\u5355\u4f4d\u3002\u5728\u65f6\u57df\u4e0a\u662f1\u4e2a\u5b50\u5e27\u957f\u5ea6\uff081ms\uff0c14\u4e2aOFDM \u7b26\u53f7\uff0c2\u4e2aRB\u65f6\u57df\u957f\u5ea6\uff09\uff0c\u5728\u9891\u57df\u4e0a\uff0c\u4e0eRB\u9891\u57df\u5bbd\u5ea6\u76f8\u540c\u4e3a12\u4e2a\u5b50\u8f7d\u6ce2180KHz\u3002<\/p>\n<p>4\u3001<strong>REG\uff08\u8d44\u6e90\u7c92\u5b50\u7ec4\uff09\u3001CCE\uff08\u63a7\u5236\u4fe1\u9053\u5355\u5143\uff09<\/strong>\u3002\u5728\u4f20\u8f93\u4fe1\u4ee4\u6570\u636e\u65f6\uff0cRE\u662f\u6700\u5c0f\u7684\u4f20\u8f93\u5355\u4f4d\uff0c\u4f46\u662f1\u4e2aRE\u592a\u5c0f\u4e86\uff0c\u56e0\u6b64\uff0c\u5f88\u591a\u65f6\u5019\u90fd\u662f\u7528REG\u6216CCE\u6765\u4f5c\u4e3a\u4f20\u8f93\u5355\u4f4d\u7684\u30021REG=4RE\uff1b1CCE=9REG=36RE\u3002\u8bb0\u4f4f\uff0cPUCCH\u7684\u6700\u5c0f\u4f20\u8f93\u5355\u4f4d\u662fCCE\uff0cPHICH\u3001PCFICH\u7684\u6700\u5c0f\u4f20\u8f93\u5355\u4f4d\u662fREG\u3002<\/p>\n<p>5\u3001<strong>Sub-frame\uff08\u5b50\u5e27\uff09<\/strong>\u3002LTE\u5e27\u7ed3\u6784\u4e2d\uff0c1\u4e2a\u65e0\u7ebf\u5e27\u5206\u4e3a10\u4e2a\u5b50\u5e27\uff0c\u6bcf\u4e2a\u5b50\u5e27\u65f6\u57df\u4e0a\u4e3a1ms\uff0c14\u4e2aOFDM \u7b26\u53f7\uff1b\u9891\u57df\u4e0a\u4e3a\u6574\u4e2a\u5e26\u5bbdBW\u3002<\/p>\n<p>6\u3001<strong>Symbol\uff08\u7b26\u53f7\uff09<\/strong>\u3002\u662f\u8c03\u5236\u540e\u7684\u7b26\u53f7\uff0c\u4ee3\u88681~N\u4e2a\u6bd4\u7279\uff081\u30012\u30014\u30016\u5bf9\u5e94BPSK\u3001QPSK\u300116QAM\u300164QAM\u7684\u8c03\u5236\u65b9\u5f0f\uff09\uff0c\u6620\u5c04\u52301\u4e2aRE\u4e0a\u4f20\u9001\uff1b\u53ef\u4ee5\u8ba4\u4e3a<strong>\u7b26\u53f7\u5728\u65f6\u95f4\u4e0a\u662f1\u4e2aOFDM \u7b26\u53f7\uff0c\u9891\u7387\u4e0a\u662f1\u4e2a\u5b50\u8f7d\u6ce215KHz<\/strong>\u3002<\/p>\n<p>7\u3001<strong>OFDM Symbol<\/strong>\u3002\u65f6\u95f4\u4e0a\u662f0.5\/7 ms\uff08\u7ea6\u4e3a71us\uff09\uff0c\u9891\u7387\u4e0a\u662f\u6574\u4e2a\u5e26\u5bbdBW\u3002<\/p>\n<p>\u53c2\u8003\u8d44\u6599\uff1aLTE\u7269\u7406\u8d44\u6e90\u4e2d\u7684\u51e0\u4e2a\u6613\u6df7\u6dc6\u540d\u8bcd\u91cd\u7533\uff08RB\u3001RE\u3001SB\u3001\u7b26\u53f7\u3001OFDM \u7b26\u53f7\uff09\u2026<\/p>\n<p><mark>\uff08\u4ee5\u4e0a\u5185\u5bb9\u6458\u5f55\u81ea\u7f51\u7edc\uff0c\u4e3a4G LTE\u6807\u51c6\u4e2d\u7684\u6982\u5ff5\uff0c\u4e0e\u5f53\u524d5G NR\u6807\u51c6\u4e0d\u5b8c\u5168\u76f8\u540c\uff0c5G\u65f6\u9891\u8c03\u5ea6\u66f4\u52a0\u7075\u6d3b\uff0c\u6ce8\u610f\u5bf9\u6bd4\u533a\u5206\uff09<\/mark><\/p>\n<hr>\n<blockquote>\n<p>\u2003\u2003<font color=\"blue\" size=\"3\">\u535a\u4e3b\u4e0d\u5b9a\u671f\u53d1\u5e03<font color=\"red\">\u300e\u4fdd\u7814\/\u63a8\u514d\u3001C\/C++\u30015G\u79fb\u52a8\u901a\u4fe1\u3001Linux\u3001\u751f\u6d3b\u968f\u7b14\u300f<\/font>\u7cfb\u5217\u6587\u7ae0\uff0c\u5982\u679c\u89c9\u5f97\u672c\u6587\u5bf9\u4f60\u6709\u5e2e\u52a9\uff0c\u53ef\u4ee5<font color=\"red\">\u300e\u70b9\u8d5e\uff0b\u5173\u6ce8\u300f<\/font>\u652f\u6301\u4e00\u4e0b\u54e6\uff01<\/font><\/p>\n<\/blockquote>\n","protected":false},"excerpt":{"rendered":"lte 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