FAST ORTHOGONAL SEARCH FOR ARRAY-PROCESSING AND SPECTRUM ESTIMATION

An efficient, general purpose modelling algorithm known as fast orthog onal search (FOS) is applied to the problem of estimating the angles o f arrival of multiple plane waves incident on an array of sensors and to the related problem of estimating the temporal frequencies of narro w-band signals in noise. An iterative version of the algorithm (IFOS), which approaches a minimum in the mean squared error between observed and modelled data, is introduced. A modification to the array steerin g vector model which is beneficial when the incident signals are coher ent is described. FOS and IFOS are compared with MUSIC and root MUSIC in computer simulations.