基于I/Q数据的5G控制信道盲检  

5G Physical Downlink Control Channel Blind Detection Based on I/Q Data

作　　者：姜国凯 魏贵明 李雷 杨业鑫 JIANG Guokai;WEI Guiming;LI Lei;YANG Yexin(China Automotive Technology and Research Center Co.,Ltd.,Tianjin 300300,China;China Academy of Information and Communications Technology,Beijing 100191,China;China Academy of Telecommunications Technology,Beijing 100191,China)

机构地区：[1]中国汽车技术研究中心有限公司,天津300300 [2]中国信息通信研究院技术与标准所无线与移动研究部,北京100191 [3]电信科学技术研究院,北京100191

出　　处：《移动通信》2022年第2期80-84,共5页Mobile Communications

摘　　要：为了研究真实环境5G下行I/Q解码流程,构建"5G核心网+5G基站+测试终端+I/Q数字采集系统"的测试环境,采集基站下行空口信号I/Q数据,并基于3GPP第15版本标准,开展5G下行控制信道PDCCH盲检流程研究,包括候选PDCCH时频域位置确定、信道估计与相关检测,PDCCH比特序列解码流程(含解扰,解速率匹配,极化码译码,循环冗余校验,信息解析等环节),展示了关键层三参数、协议流程、算法原理以及PDCCH解码星座图。In order to investigate 5G downlink I/Q decoding process in the real environment,a test environment of"5G core network+5G base station+test terminal+I/Q digital acquisition system"is constructed.Via collecting the downlink air interface signal I/Q data of a base station,the blind detection process of 5G PDCCH(physical downlink control channel)is studied based on 3GPP release 15 standard,including candidate PDCCH time-frequency domain position determination,channel estimation and correlation detection,and the decoding process of PDCCH bit sequence(including descrambling,de-rate matching,polar code decoding,cyclic redundancy check,information parsing,etc.).Key parameters of the third layer,protocol procedures,algorithm principle,and PDCCH decoding constellation diagram are presented.

关 键 词：5G I/Q数据 控制信道 信号解码 

分 类 号：TN929.5[电子电信—通信与信息系统]