Estimating the angles-of-arrival of wide-band emitters is an important problem in array processing. This paper introduces a novel method which is applicable if the sensor array consists of doublets and if the wide-band signals can be accurately modeled as the output of a linear time-invariant system driven by white noise. The novelty in our approach lies in the use of state-space descriptions for the sensor outputs. We present two algorithms. The first is a simple nonrecursive algorithm. The second is a recursive algorithm with reduced computational complexity. Due to its regular parallel structure this algorithm is well suited for parallel implementation, e.g. in real-time applications requiring high throughput.