Modified Capon Beamformer for Coherent Interference

摘要

In this paper, we propose a modified Capon beamformer to give improved performance in coherent jamming environments. First, we briefly discuss the interference rejection and signal cancellation properties of the Capon beamformer in the presence of correlated interference, with a view to motivating the need to decorrelate the desired source signal from the interferences. We then introduce subarray covariance averaging techniques for decorrelating the impinging sources, and present an optimal weighting scheme that ensures perfect decorrelation of the sources for any given number of subarrays. Computer simulations are included to support our analysis.