电讯技术2024，Vol.64Issue(1)：114-119,6.DOI:10.20079/j.issn.1001-893x.230425001
一种区分极化码编码的PDCCH帧和噪声帧的算法
A Method for Distinguishing Polarized PDCCH Frames from Noise Frames
摘要
Abstract
In 5G systems,the polar code is used to encode the downlink control information,which is sent to the user equipment through the physical download control channel(PDCCH).The user equipment obtains its own control information through polar code blind detection.In general,the frames received by the user equipment include polarized codeword frames and noise frames,and if all of them are decoded,there will be unnecessary overhead.To solve this problem,the authors propose a method based on threshold inspection to distinguish polarized codeword frames from noise frames.The method sets different hard decision reliability thresholds for each node according to the polar code words received at the receiving end,then sorts the number of nodes that fail the threshold test in ascending order for all frames.Frames with lower failure counts are selected for subsequent blind decoding,thereby eliminating a certain number of noisy frames before blind decoding,significantly reducing the blind decoding energy consumption at the user equipment end.The proposed scheme is simulated and verified by building a simulation platform.The results show that,compared with the existing discrimination algorithms,this scheme can reduce the missed detection rate by more than 90%under the same complexity.关键词
5G/极化码/物理下行控制信道(PDCCH)/盲检Key words
5G/polar code/physical download control channel(PDCCH)/blind detection分类
信息技术与安全科学引用本文复制引用
汪奕汝,管鹏鑫,王夏怡,赵玉萍..一种区分极化码编码的PDCCH帧和噪声帧的算法[J].电讯技术,2024,64(1):114-119,6.基金项目
国家重点研发计划(2018YFB1801403) （2018YFB1801403）
