Hybrid Beamforming for Millimeter Wave Full-Duplex under Limited Receive Dynamic Range

TL;DR

This paper introduces a comprehensive hybrid beamforming design for full-duplex mmWave MIMO systems that accounts for practical constraints like limited RF chains, channel knowledge, and receiver dynamic range, aiming to mitigate self-interference effectively.

Contribution

It presents the first holistic design addressing analog/digital beamformers considering practical hardware constraints and receiver saturation in full-duplex mmWave systems.

Findings

Design effectively prevents receiver saturation in various scenarios.

Numerical results validate the importance of saturation prevention.

Insights serve as practical references for full-duplex mmWave transceiver design.

Abstract

Full-duplex millimeter wave (mmWave) communication has shown increasing promise for self-interference cancellation via hybrid precoding and combining. This paper proposes a novel mmWave multiple-input multiple-output (MIMO) design for configuring the analog and digital beamformers of a full-duplex transceiver. Our design is the first to holistically consider the key practical constraints of analog beamforming codebooks, a minimal number of radio frequency (RF) chains, limited channel knowledge, beam alignment, and a limited receive dynamic range. To prevent self-interference from saturating the receiver of a full-duplex device having limited dynamic range, our design addresses saturation on a per-antenna and per-RF chain basis. Numerical results evaluate our design in a variety of settings and validate the need to prevent receiver-side saturation. These results and the corresponding insights serve as useful design references for practical full-duplex mmWave transceivers.