Finite-Resolution and Energy-Efficient Digital Beamforming Design for 5G/6G Millimeter-wave Networks

Project: Research

Project Details


Recent studies have shown that low-resolution analog-to-digital-converters and digital-to-analog-converters (ADCs and DACs) can make fully-digital beamforming more energy efficient than its analog or hybrid beamforming counterpart over wide-band millimeter-wave (mmWave) channels. Inspired by this, we aim to propose a computationally efficient fully-digital beamformer relying on low-resolution ADCs/DACs for multi-user mmWave communication networks. The existing contributions are mainly focused on the analysis of finite-resolution fully-digital beamformers designed for mmWave systems. Although some beamforming solutions have been designed for infinite-resolution ADCs for a single-user scenario, it is challenging to extend their proposed design to finite- resolution ADC based multi-user scenarios. This is because employing finite-resolution ADC either makes the non-convex problem further complex or it transforms a convex problem to a non-convex problem, depending upon the structure of beamforming design. Our goal is to tackle this challenging beamforming design problem by developing computationally efficient steep ascent algorithm, which will have the radical benefit of relying on a closed-form solution at each iteration. Our results will compare the energy efficiency of the proposed finite-resolution digital beamforming design with that of the conventional hybrid beamforming or infinite-resolution digital beamforming solutions.
Effective start/end date15/03/221/01/23


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