Modified MUSIC in the presence of random phase errors

Abstract

The high resolution direction-finding technique Multiple Signal Classification (MUSIC) provides excellent direction-of-arrival (DOA) performance under ideal conditions. Its performance, however, is significantly degraded under conditions of element phase errors. Robust constraints that have previously been developed to protect signal-to-noise performance of a desired signal in phase perturbed adaptive beamformers can be used in a modified form of MUSIC to protect performance against phase errors. Such phase perturbations can be caused by channel phase errors, array element placement errors, and frequency errors. Simulation results are presented with random element placement errors.<>