Aj. Weiss et B. Friedlander, ANALYSIS OF A SIGNAL ESTIMATION ALGORITHM FOR DIVERSELY POLARIZED ARRAYS, IEEE transactions on signal processing, 41(8), 1993, pp. 2628-2638
We consider the problem of separating and estimating the waveforms of
superimposed signals received by a diversely polarized array. Signal e
stimation is accomplished by a two step procedure: 1) The direction of
arrivals and polarization parameters of all the signals are estimated
using an eigenstructure-based technique. 2) The estimated signal is o
btained as a linear combination of the array outputs, with weights whi
ch are computed from the estimated direction/polarization parameters.
The objective of this paper is to analyze the quality of the estimated
signal in terms of the output signal-to-interference ratio (SIR) and
output signal-to-noise ratio (SNR). Closed form expressions are derive
d for the output SIR and SNR of a general diversely polarized array. B
y evaluating these expressions for selected test cases it is shown tha
t polarization sensitive arrays can provide significantly higher outpu
t SIR and SNR than uniformly polarized arrays. The performance improve
ment is especially significant for closely spaced sources with suffici
ently different polarization characteristics.