Direction of arrival tracking below the ambiguity threshold

We present an algorithm for direction-of-arrival tracking that allows operation below the ambiguity threshold of the direction nding system. Using multiple target tracking techniques, the algorithm turns the most likely directions-of-arrival of each measurement into multiple potential tracks and then selects the true track as that with the maximum cumulative likelihood. The improvement o ered by the algorithm, namely the extension of the ambiguity-free domain, is demonstrated by simulated experiments.