Title :
Time-frequency DOA estimate algorithm based on SPWVD
Author_Institution :
Dept. of ELectron. & Commun. Eng., Harbin Inst. of Technol., China
Abstract :
In studies on DOA estimate based on time-frequency analysis, for the case of multi-signal sources, eliminating cross interference terms is an important problem. It is the key to improve DOA estimate performance. WVD is the most commonly used time-frequency analysis tool, but it has a very big bug that it will generate cross interference terms in case of multi-signal sources. So PWVD is used to suppress cross terms in many cases. However, the effect of PWVD suppressing cross terms doesn´t be so ideal and the estimated results are not so reliable. This paper employ SPWVD which effectively suppress cross terms by using smoothing for two times in both time domain and frequency domain, consequently it improves the accuracy of DOA estimate much more greatly. Simulation results demonstrate in the background of multi sources the performance of DOA estimate algorithm based on SPWVD improves compared with that based on PWVD.
Keywords :
direction-of-arrival estimation; interference suppression; signal processing; signal sources; smoothing methods; time-frequency analysis; DOA; PWVD suppression; SPWVD; directional-of-arrival estimation; multisignal sources; pseudo Winger-Ville distribution; smoothing method; time-frequency analysis; Additive noise; Direction of arrival estimation; Frequency domain analysis; Frequency estimation; Interference; Maximum likelihood estimation; Multiple signal classification; Signal generators; Signal resolution; Time frequency analysis; DOA estimate; SPWVD; cross term suppression; time-frequency analysis;
Conference_Titel :
Microwave, Antenna, Propagation and EMC Technologies for Wireless Communications, 2005. MAPE 2005. IEEE International Symposium on
Print_ISBN :
0-7803-9128-4
DOI :
10.1109/MAPE.2005.1618151
