Broad-band, beam-space, signal-subspace source localization

A general reconfigurable real-time preprocessing structure is proposed and discussed for broadband signal-subspace spatial-spectral estimators. This reduced-dimension beam-space (RDBS) focusing preprocessor focuses broadband sources and effectively reduces the observation dimension before a source localization computation. The preprocessing structure is considered for use in estimating the locations of broadband sources from array data using both H. Wang and M. Kaveh's (1985) coherent-signal-subspace method and K.M. Buckley and L.J. Griffiths' (1986) broadband signal subspace spatial spectrum (BASS-ALE) estimation technique. An example of RDBS used with BASS-ALE to simulate a linear equispaced broadband array of 16 omnidirectional elements is included.<<ETX>>