Modulo conversion method for estimating the direction of arrival
U. M. S. Murthy, Ranjan K. Mallik, K. R. Sundaram · IEEE Transactions on Aerospace and Electronic Systems · 2000
A modulo conversion method for resolving phase ambiguity and consequently estimating the direction of arrival (DOA) of an electromagnetic wave incident on a multielement interferometer with nonuniform spacings is presented. The technique involves a step-by-step reduction of the number of ambiguities in the measured phase difference of the longest interelement spacing. A major advantage of this method is that even the shortest interelement spacing can be larger than half-wavelength.