Low-resolution Phase Shifters Research Articles

Joint beamforming with low‐resolution PSs for millimetre‐wave communications

An iterative joint beamforming algorithm taking the low-resolution phase shifters (PSs) into account is proposed for millimetre-wave communications. Furthermore, performance degradation incurred by the low-resolution PSs is analysed. Simulation results show that the proposed algorithm can achieve comparable performance with the existing alternatives in terms of the array gains and convergence rates but with limited hardware cost. Thus, the proposed scheme can be an acceptable tradeoff between the performance and hardware complexity.

Partial adaptive nulling on a monopulse phased array antenna system

A partial phase-only nulling (PPON) algorithm has been developed and evaluated on a 496-element monopulse phased array antenna system which employs five-bit phase shifters. Using this PPON algorithm allows nulls in the far-field pattern to be steered to the desired directions for a phased array equipped with low-resolution phase shifters to perform simultaneous nulling in the sum and two difference patterns in the environment of multiple jammers. Simulated and experimental patterns are illustrated.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>