Adaptive interference and multipath rejection in linear direction-finding arrays

This paper investigates the use of a new technique due to Shan and Kailath [1] to reject multipath impinging on linear sensor arrays. The new technique uses switched subarrays to decorrelate the multipath arrival from the signal of interest. After this preprocessing, adaptive arrays can reject the multipath as well as other uncorrelated interferers. Using phase interferometry as an example, it is found that the new technique is most effective when the subarrays can be spatially switched over a distance chosen to fully decorrelate the multipath from the desired signal.