Title :
Improved angular resolution of beamspace MUSIC for finding directions of coherent sources
Author :
Phaisal-atsawasenee, Navapol ; Suleesathira, Raungrong
Author_Institution :
Dept. of Electron. & Telecommun. Eng., King Mongkut´´s Univ. of Technol., Bangkok
Abstract :
Beamspace MUSIC (multiple signal classification) of forward-backward spatial smoothing are used to estimate the directions of coherent arrivals. Coherence are often encountered in sonar, radar, or mobile communications. Such combination can be degraded when the source signals become coherent or strongly correlated. In this paper, we improve angular resolution of beamspace MUSIC by using the forward-backward averaging of a combined signal eigenvectors. The sample covariance matrix computed from the forward-backward spatial smoothing is exploited for an eigen-decomposition. The decorrelation performance of the proposed method is compared to the several methods based on MUSIC and on beamspace MUSIC, in terms of directions of arrival (DOA) estimations, MSEs versus (1) correlation, (2) noise variance and (3) SNRs, probability of resolution to separate closely spaced DOAs
Keywords :
coherence; direction-of-arrival estimation; mobile communication; radar signal processing; radio direction-finding; signal classification; sonar signal processing; beamspace multiple signal classification; direction finding; directions of arrival estimations; forward-backward spatial smoothing; mobile communications; radar communications; sonar communications; Covariance matrix; Degradation; Direction of arrival estimation; Mobile communication; Multiple signal classification; Radar; Signal resolution; Smoothing methods; Sonar; Spatial resolution;
Conference_Titel :
Systems and Control in Aerospace and Astronautics, 2006. ISSCAA 2006. 1st International Symposium on
Conference_Location :
Harbin
Print_ISBN :
0-7803-9395-3
DOI :
10.1109/ISSCAA.2006.1627701
