Frequency Domain Adaptive Decoupling in Multiple Output Array Processors.

This research is concerned with reducing the deleterious effects of undesired signals which are received through the side lobes of an array in a multiple output array processor. Two forms of beam decoupling systems are suggested. The first is a non-iterative form which in general, requires a matrix inversion of a power spectral density matrix and the second more useful form is an adaptive algorithm that avoids the direct matrix inversion and the attendent computational requirements of this inversion. This iterative algorithm operates in the frequency domain and in real time to reduce the mean square coupling between fixed adjacent performed beams. A discrete frequency domain approach is used to avoid time-delay networks which would be needed in a time domain decoupling system. In addition, a frequency domain system offers frequency selectivity in that, at each discrete frequency beam decoupling can be effected.