Simultaneous sector processing via ROOT-MUSIC for large sensor arrays

A viable means of implementing eigenstructure methods in very large array scenarios is to decompose the full angular spectrum into sub-bands via spatial filtering and to subsequently apply beamspace MUSIC to each sub-band. Despite the non-Vandermonde structure of the beamspace manifold vector, a computationally efficient scheme for implementing ROOT-MUSIC in beamspace is developed. The use of classical tapering schemes such as the Hanning and Hamming windows is incorporated as an option in beamspace ROOT-MUSIC for the purpose of combating the pejorative effects of strong out-of-band sources.<>