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

Abstract

Three dimensional (3D) resource reuse is an important design requirement for the prospective sixth generation (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 precoding 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 evaluate the performance of the proposed scheme using the 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.

6G: Technology Evolution in Future Wireless Networks

“…The architecture integrates the interdependent relationship between the low-layer-based cell-free network and the high-layer-based cellular network. In [92], a cooperative 3D beamformer in 3D space has been formulated. Multiple BS antennas are incorporated for the combined utilization of zero forcing pre-coding technique to attain the beam for the transmitting signal in a particular 3D direction.…”