Parallel and Distributed Hybrid Beamforming for Multicell Millimeter Wave MIMO Full Duplex

TL;DR

This paper introduces parallel and distributed hybrid beamforming schemes for multicell mmWave full duplex MIMO systems, achieving high performance with reduced complexity and overhead compared to centralized methods.

Contribution

It proposes a novel distributed hybrid beamforming framework that enables parallel processing at base stations, reducing complexity and communication overhead while maintaining performance.

Findings

P&D-HYBF achieves performance comparable to centralized HYBF.

Both hybrid beamforming designs outperform fully digital half duplex systems with few RF chains.

Distributed approach significantly reduces computational complexity and communication overhead.

Abstract

Full duplex (FD) is an auspicious wireless technology that holds the potential to double data rates through simultaneous transmission and reception. This paper proposes two innovative designs of hybrid beamforming (HYBF) for a multicell massive multiple-input-multiple-output (mMIMO) millimeter wave (mmWave) FD system. Initially, we introduce a novel centralized HYBF (C-HYBF) scheme, which employs the minorization-maximization (MM) method. However, while centralized beamforming designs offer superior performance, they suffer from high computational complexity, substantial communication overhead, and demand expensive computational resources. To surmount these challenges, we present a framework that facilitates per-link parallel and distributed HYBF (P&D- HYBF) in the mmWave frequency band. This cooperative approach enables each base station (BS) to independently solve its local, low-complexity sub-problems in parallel, resulting in a substantial reduction in communication overhead and computational complexity. Simulation results demonstrate that P&D-HYBF achieves comparable performance to C-HYBF, and with only a few radio-frequency (RF) chains, both designs surpass the capabilities of fully digital half duplex (HD) systems.