Quiescent pattern control in adaptive antenna processing at sub-array level

This paper deals with the optimization of adaptive techniques operating with partially overlapped sub-arrays. A new adaptive scheme is introduced, that properly cancels jamming signals when present, but gives exactly the desired quiescent pattern in the absence of jammers. The proposed scheme is shown to work properly in both cases of linear and planar arrays for both sum and delta patterns; moreover, the performance analysis shows that the pattern control capability is achieved at the expense of little detection losses when compared to the performance of the optimum filter.