Hybrid Precoding With Time-Modulated Arrays for Mmwave MIMO Systems

IEEE Access

Jose P. Gonzalez-Coma¹  Luis Castedo²  Roberto Maneiro-Catoira³ 

[1] Department of Computer Engineering, CITIC, GTEC, Faculty of Inform&x00E1;a, A Coru&x00F1;tica, University of A Coru&x00F1;

关键词: Hybrid precoding;    time-modulated arrays;    mmWave;    MIMO;    RF precoding network;   

DOI  :  10.1109/ACCESS.2018.2874005

来源: DOAJ

【 摘 要 】

We consider the utilization of time-modulated arrays (TMAs) as a simple and cost-effective approach to hybrid digital–analog precoding in millimeter wave (mmWave) multiple-input multiple-output (MIMO) systems. Instead of conventional variable phase shifters (VPSs), our proposed TMA hybrid precoders use radio frequency (RF) switches followed by 1-bit VPSs in the analog part. We study the insertion losses at mmWave of a TMA analog precoding network in terms of sideband radiation and hardware efficiency. In addition, we present different algorithms for the design of both the baseband and RF parts of a TMA hybrid precoder. The proposed methods exhibit different tradeoffs between performance, complexity, and power efficiency. Finally, TMA precoders are compared to those implemented with conventional VPSs in terms of insertion losses, chip area, and cost, concluding that precoding with TMAs is a competitive solution for mmWave MIMO systems.

【 授权许可】

Unknown