DIRECTION FINDING OF MULTIPLE WIDE-BAND EMITTERS USING STATE-SPACE MODELING

Estimating the angles-of-arrival of wide-band emitters is an important problem in array processing. This paper introduces a novel method whi ch is applicable if the sensor array consists of doublets and if the w ide-band signals can be accurately modeled as the output of a linear t ime-invariant system driven by white noise. The novelty in our approac h lies in the use of state-space descriptions for the sensor outputs. We present two algorithms. The first is a simple nonrecursive algorith m. The second is a recursive algorithm with reduced computational comp lexity. Due to its regular parallel structure this algorithm is well s uited for parallel implementation, e.g. in real-time applications requ iring high throughput.