Closed-Form Hybrid Beamforming Solution for Spectral Efficiency Upper Bound Maximization in mmWave MIMO-OFDM Systems

被引：3

作者：

Ma, Mengyuan ^{[1
]}

Nhan Thanh Nguyen ^{[1
]}

Juntti, Markku ^{[1
]}

机构：

[1] Uninves Oulu, Ctr Wireless Commun CWC, POB 4500, FI-90014 Oulu, Finland

来源：

2021 IEEE 94TH VEHICULAR TECHNOLOGY CONFERENCE (VTC2021-FALL) | 2021年

基金：

芬兰科学院;

关键词：

Hybrid beamforming; millimeter wave; MIMO-OFDM; spectral efficiency; computational efficiency;

D O I：

10.1109/VTC2021-FALL52928.2021.9625163

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Hybrid beamforming is considered a key enabler to realize millimeter wave (mmWave) multiple-input multiple-output (MIMO) communications due to its capability of considerably reducing the number of costly and power-hungry radio frequency chains in the transceiver. However, in mmWave MIMO orthogonal frequency-division multiplexing (MIMO-OFDM) systems, hybrid beamforming design is challenging because the analog precoder and combiner are required to be shared across the whole employed bandwidth. In this paper, we propose closed-form solutions to the problem of designing the analog precoder/combiner in a mmWave MIMO-OFDM system by maximizing the upper bound of the spectral efficiency. The closed-form solutions facilitate the design of analog beamformers while guaranteeing state-of-art performance. Numerical results show that the proposed algorithm attains a slightly improved performance with much lower computational complexity compared to the considered benchmarks.

引用

页数：5