Suboptimal real-time frequency/incident-angle estimator for multiple radar pulses

A method is presented that provides numerical estimates of properly paired frequency and incident angles for an arbitrary number of sinusoidal radar pulses incident on a linear array. The key element of the method is a two-stage suboptimal technique that estimates the angle of arrival of a pulse by using the output of two antenna elements and a previously calculated value of paired frequency. A method of extending the two-element method to multiple elements, by using a noise protected modification of the Chinese remainder theorem (CRT) is also advanced. Owing to its simplicity, the algorithm is appropriate to real-time processing