Analysis of Signal Cancellation Due To Multipath in Optimum Beamformers for Moving Arrays
Paulraj, A.
Reddy, V.
Kailath, T.
Dept. of Electrical Engineering, Stanford University, Stanford, CA, USA;
This paper appears in: Oceanic Engineering, IEEE Journal of
Publication Date: Jan 1987
Volume: 12,
Issue: 1
On page(s): 163- 172
ISSN: 0364-9059
Current Version Published: 2003-01-06
Abstract
In this paper, we study the effect of array motion on signal cancellation and interference rejection in optimum beamformers in the presence of multipath with partially or fully correlated sources. First, we show how array motion causes signal decorrelation with a rate that depends on the spacing and directions of the sources. Next, we briefly discuss the signal cancellation and interference rejection behavior of the optimum beamformer in the presence of a correlated interference to motivate the need to decorrelate the desired source from the interference. We then propose an optimally weighted covariance averaging technique to ensure perfect decorrelation of the sources for any given displacement. Computer plots and simulation results are included to support our analysis.
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