On the resolution capacity of wideband sensor arrays

Summary form only given. The superresolution estimation of bearings of wideband sources using fewer sensors than sources was addressed. The fundamental limits on the maximum number of wideband sources uniquely resolvable by a passive sensor array, called the resolution capacity of the array, were studied. The source signals are assumed to be uncorrelated zero-mean, second-order stationary, and ergodic wideband random processes occupying a common bandwidth. The array is assumed to be uniform and linear, and L≫1 Nyquist-rate samples of its output are assumed to be collected into a snapshot supervector. N≫1 such snapshots are assumed to be available