Performance comparison of robust array algorithms in delay estimation

Impulsive interference mitigation capabilities of robust array algorithms are considered in delay estimation of a direct sequence spread spectrum (DS/SS) system. The simulations are done in the environment where the direction of arrival (DOA) of individual impulses is either random or fixed. It is shown that the minimum variance distortionless response (MVDR) beamforming algorithm without any interference suppression algorithm is sufficient if impulses are arriving from a fixed DOA. In the random DOA case the performance of the MVDR beamformer algorithm alone is very poor and impulse suppression methods are needed. The paper compares four different impulse suppression methods. It is shown that the best algorithm allow over 60% of snapshots to be corrupted.