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.