This paper describes a class of partially adaptive arrays withadaptive processing applied to the outputs of steered subarrays. Theproblem is to detect a signal or estimate its direction of arrival inthe presence of jam- mers. The advantage of applying adaptiveprocessing to subarrays is that it requires much less CPU time thanthe corresponding fully adaptive processing. The subarray processingequations for the two kinds of problem are described. In this paper,we compare partially adaptive processing performance with fullyadaptive pro- cessing performance in the case of the followingantenna and signal sources: -array with regularly spaced sensors;-between 20 and 100 elements; -between 3 and 20 subarrays; -a singlejammer; -desired signal form the antenna zenith.
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