1-Bit MIMO for Terahertz Channels

TL;DR

This paper investigates 1-bit MIMO communication over Terahertz channels, comparing beamforming and equiprobable signaling, and demonstrates near-capacity spectral efficiencies across various channel types.

Contribution

It provides a capacity benchmark and analyzes the effectiveness of combined beamforming and signaling strategies in 1-bit MIMO Terahertz systems.

Findings

Combined strategies operate within a modest gap from capacity.

Performance varies with channel type and wavefront assumptions.

Spectral efficiency is optimized using specific signaling and beamforming techniques.

Abstract

This paper tackles the problem of single-user multiple-input multiple-output communication with 1-bit digital-to-analog and analog-to-digital converters. With the information-theoretic capacity as benchmark, the complementary strategies of beamforming and equiprobable signaling are contrasted in the regimes of operational interest, and the ensuing spectral efficiencies are characterized. Various canonical channel types are considered, with emphasis on line-of-sight settings under both spherical and planar wavefronts, respectively representative of short and long transmission ranges at mmWave and terahertz frequencies. In all cases, a judicious combination of beamforming and equiprobable signaling is shown to operate within a modest gap from capacity.