Capacity-Driven Low-Interference Fast Beam Synthesis for Next Generation Base Stations

TL;DR

This paper introduces a hybrid beamforming technique for real-time MIMO array control that optimizes capacity and minimizes interference efficiently, suitable for next-generation base stations.

Contribution

It presents a non-iterative synthesis method for MIMO beamforming that balances capacity, interference, and computational efficiency in real-time scenarios.

Findings

Effective in various propagation scenarios

Reduces computational complexity

Maintains high capacity and low interference

Abstract

The problem of the real-time multiple-input multiple-output (MIMO) array control when requirements on capacity performance, out-of-cell interference, and computational efficiency are simultaneously enforced is addressed by means of an innovative hybrid beamforming technique. The synthesis of the excitations of the MIMO system is first re-formulated as that of matching an ideal "hybrid" pattern fitting capacity or low-interference constraints along the angular coordinates. Then, a non-iterative processing scheme is derived for each MIMO beam where numerically-efficient synthesis techniques are profitably combined. Representative results, from an extensive numerical validation, are discussed to show, also comparatively, the advantages and the current limitations of the proposed synthesis method when dealing with different propagation scenarios, number of transmitters/receivers, and noise levels.