A new criterion for adaptive beamsumming
R. DeLap, Alfred O. Hero · 1992
A new criterion for adaptive beamsumming is introduced which explicitly accounts for mean and RMS signal amplitudes yet is relatively simple to implement. The adaptation criterion is expressed as a convex combination of squared-mean array-gain and mean-squared array-gain at the output of the beamsummer. Theoretical and practical motivation for the criterion is given. Simulations are provided which indicate that, relative to the classical beamsummer, the new method gives adaptive weights which have better convergence properties, allow better multiple signal resolution, and produce lower signal angle-of-arrival estimator variance.>