Sensitivity and performance analysis of coherent signal-subspace processing for multiple wideband sources

This paper presents some of the statistical properties of a new signal-subspace approach to the estimation of the angles-of-arrival (AOA) of several wideband plane waves received in noise. This approach is denoted as the Coherent Signal-Subspace Method (CSM). The statistics that are presented include the bias and variance of the AOA estimates as well as a statistical measure of the similarity between the true and estimated coherent signal-subspaces.