Cyclostationarity based DOA estimation for wideband sources with a conjugate minimum-redundancy linear array

• Published in: Proceedings. (ICASSP '05). IEEE International Conference on Acoustics, Speech, and Signal Processing, 2005 Vol. 4; pp. iv/925 - iv/928 Vol. 4
• Main Authors: Huiqin Yan, Fan, H.H.
• Format: Conference Proceeding
• Language: English
• Published: IEEE 2005
• Subjects: Delay effects; Direction of arrival estimation; Frequency; Interference; Linear antenna arrays; Multiple signal classification; Narrowband; Signal detection; Smoothing methods; Wideband
• ISBN: 9780780388741; 0780388747
• ISSN: 1520-6149; 2379-190X
• DOI: 10.1109/ICASSP.2005.1416161

Cyclostationarity based direction of arrival (DOA) estimation is of interest due to its immunity to interference and noise. Recently the use of cyclic methods with a conjugate minimum-redundancy linear array (MRLA) and an appropriate matrix augmentation technique was exploited by Gelli and Izzo (1997) to improve the performance of cyclic MUSIC for narrowband signals. In this paper, we propose a cyclostationarity based wideband signal DOA estimation method with a conjugate MRLA. Exploiting the similarity of our problem to DOA estimation for coherent signals, we propose to utilize the forward/backward spatial smoothing (FBSS) technique in our method instead of using the matrix augmentation technique. It is shown that our new method, in addition to generalizing the previous method to wideband signals, is able to detect more signals with improved performance to the previous method.