Performance analysis of signal estimation using polarization sensitive arrays

The authors consider the problem of separating and estimating the waveforms of superimposed signals received by a diversely polarized array. This is accomplished by first estimating the signal directions and polarizations, and then computing the weights of the corresponding linear combiner. Closed form expressions are derived for the output Signal-to-Interference Ratio and Signal-to-Noise Ratio of a general diversely polarized array. It is shown that polarization sensitive arrays can provide significantly higher output SIR and SNR than uniformly polarized arrays