[IEEE Proceedings 7th International Conference on Signal Processing, 2004. Proceedings. ICSP '04. 2004. - Beijing, China (Aug. 31 - Sept. 4, 2004)] Proceedings 7th International Conference on Signal Processing, 2004. Proceedings. ICSP '04. 2004. - Doa estimation of wideband sources using a constant-q subband coherent mvdr method