Cubic Metric Reduction for Repetitive CAZAC Sequences in Frequency Domain  

作　　者：Yajun Zhao Juan Liu Saijin Xie 

机构地区：[1]Beijing Institute of Technology,Beijing 100081,China [2]ZTE Corporation,Beijing 100029,China

出　　处：《China Communications》2021年第12期196-207,共12页中国通信（英文版）

摘　　要：To meet the requirements of Occupied Channel Bandwidth(OCB)of unlicensed spectrum,in NR-based Access to Unlicensed Spectrum(NR-U)of 5G New Radio(NR)system,the channels of PRACH and PUCCH have to employ some frequency domain sequence repetition schemes.These repeti-tion schemes cause serious Cubic Metric(CM)prob-lems for these channels,although these two types of channels are composed of Constant Amplitude Zero Auto-correlation(CAZAC)sequences.Considering the properties of CAZAC sequences,which are used for PRACH and PUCCH(refer to PUCCH format 0 and format 1)in 5G NR system,in this paper,we pro-pose some new schemes of CM reduction for these two channels taking into account the design princi-ples to ensure the sequence performance of the auto-correlation and cross-correlation.Then the recom-mended CM reduction schemes are evaluated and the optimized parameters are further provided considering both CM performance and the complexity.

关 键 词：5G OFDM cubic metric NR-U oc-cupied channel bandwidth CAZAC zadoff-chu se-quence 

分 类 号：TN929.5[电子电信—通信与信息系统]