Limited Feedback in Multiple-Antenna Systems with One-Bit Quantization

TL;DR

This paper investigates limited feedback strategies for multiple-antenna communication systems employing one-bit ADCs, emphasizing the importance of phase information and proposing a novel codebook design for beamforming.

Contribution

It introduces a new codebook design that separately quantizes channel direction and residual phase for systems with one-bit ADCs, addressing the unique phase alignment challenges.

Findings

Proposed codebook improves beamforming performance with one-bit ADCs.

Phase quantization is crucial for signal alignment in low-resolution systems.

Initial results demonstrate potential gains in limited feedback scenarios.

Abstract

Communication systems with low-resolution analog-to-digital-converters (ADCs) can exploit channel state information at the transmitter (CSIT) and receiver. This paper presents initial results on codebook design and performance analysis for limited feedback systems with one-bit ADCs. Different from the high-resolution case, the absolute phase at the receiver is important to align the phase of the received signals when the received signal is sliced by one-bit ADCs. A new codebook design for the beamforming case is proposed that separately quantizes the channel direction and the residual phase.