Title :
Coherent wideband DOA estimation of multiple FM signals using spatial time-frequency distributions
Author :
Gershman, Alex B. ; Amin, Moeness G.
Author_Institution :
Dept. of Electr. & Comput. Eng., McMaster Univ., Hamilton, Ont., Canada
Abstract :
The previously developed concept of narrowband spatial time-frequency distributions (STFDs) is extended to the wideband case. A new STFD-based root-MUSIC estimator is proposed. This estimator exploits a short-window spatial pseudo Wigner-Ville distribution (SPWVD) to enable application of the subspace-based approach. To combine all relevant SPWVD points, the proposed technique employs an extended coherent signal-subspace (CSS) principle involving coherent averaging over a pre-selected set of time-frequency points rather than the conventional frequency-only averaging procedure
Keywords :
Wigner distribution; array signal processing; direction-of-arrival estimation; frequency modulation; signal classification; time-frequency analysis; DOA estimation; STFD-based root-MUSIC estimator; coherent averaging; coherent signal-subspace; coherent wideband DOA estimation; direction of arrival estimation; multiple FM signals; sensor arrays; signal model; simulation results; spatial pseudo Wigner-Ville distribution; spatial time-frequency distributions; subspace-based approach; Cascading style sheets; Chirp; Direction of arrival estimation; Frequency estimation; Iterative algorithms; Narrowband; Sensor arrays; Signal processing; Time frequency analysis; Wideband;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 2000. ICASSP '00. Proceedings. 2000 IEEE International Conference on
Conference_Location :
Istanbul
Print_ISBN :
0-7803-6293-4
DOI :
10.1109/ICASSP.2000.861184
