Cooperative 3D Beamforming for Small-Cell and Cell-Free 6G Systems

TL;DR

This paper introduces a cooperative 3D beamforming technique for 6G systems that enhances spectral efficiency and reduces interference by joint antenna pre-coding in both cell-based and cell-free architectures.

Contribution

It proposes a novel cooperative 3D beamforming method utilizing joint zero forcing pre-coding for improved 3D spatial resource reuse in 6G wireless systems.

Findings

Improved Volumetric Spectral Efficiency (VSE) with the proposed scheme.

Enhanced spectral efficiency (SE) demonstrated through simulations.

Reduced Bit Error Rate (BER) in various deployment scenarios.

Abstract

Three dimensional (3D) resource reuse is an important design requirement for the prospective 6G wireless communication systems. Hence, we propose a cooperative 3D beamformer for use in 3D space. Explicitly, we harness multiple base station antennas for joint zero forcing transmit pre-coding for beaming the transmit signals in specific 3D directions. The technique advocated is judiciously configured for use in both cell-based and cell-free wireless architectures. We evaluated the performance of the proposed scheme using the novel metric of Volumetric Spectral Efficiency (VSE). We also characterized the performance of the scheme in terms of its spectral efficiency (SE) and Bit Error Rate (BER) through extensive simulation studies.