Title :
Efficient DOA estimation method employing unitary improved polynomial rooting
Author :
Lin, E. ; Bai, Lin ; Kam, Moshe
Author_Institution :
Data Fusion Lab., Drexel Univ., Philadelphia, PA, USA
Abstract :
High resolution direction-of-arrival (DOA) estimation is one of the most challenging problems in array signal processing. In this paper, a variation of the improved polynomial rooting (IPR) method is proposed for DOA estimation of multiple targets by a sensor array. The variation, unitary IPR (UIPR), transforms the complex-valued covariance matrix of the sensor signals to a real-valued matrix using unitary transformations. Then the IPR method is applied to determine the DOA of the targets. Simulation results indicate the potential improvement provided by our approach compared with MUSIC, Root-MUSIC, ESPRIT, and IPR.
Keywords :
array signal processing; covariance matrices; direction-of-arrival estimation; polynomial matrices; signal resolution; array signal processing; covariance matrix; direction-of-arrival estimation; high resolution DOA estimation; multiple targets; real-valued matrix; sensor array; unitary improved polynomial rooting; unitary transformations; Covariance matrix; Direction of arrival estimation; Frequency estimation; Intellectual property; Intelligent sensors; Laboratories; Multiple signal classification; Polynomials; Sensor arrays; Signal resolution;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 2004. Proceedings. (ICASSP '04). IEEE International Conference on
Print_ISBN :
0-7803-8484-9
DOI :
10.1109/ICASSP.2004.1326243
