DocumentCode :
1825761
Title :
Asymptotically decoupled angle-frequency estimation with sensor arrays
Author :
Athley, Fredrik
Author_Institution :
Dept. of Signals & Syst., Chalmers Univ. of Technol., Goteborg, Sweden
Volume :
2
fYear :
1999
fDate :
24-27 Oct. 1999
Firstpage :
1098
Abstract :
This paper investigates the problem of jointly estimating the directions of arrival (DOA) and Doppler frequencies of multiple targets with a pulsed Doppler radar employing an array antenna. This is an application of 2-D frequency estimation. It is shown how the original 2-D estimation problem can be reduced into two 1-D problems. The asymptotic 2-D Cramer-Rao bound (CRB) is derived and compared to the 1-D CRB. It is shown that the DOA bounds are equal for large number of antenna elements. A 1-D/1-D estimator is then presented that achieves the 2-D CRB when the number of temporal snapshots is large. This decoupling of the 2-D problem into sequential 1-D problems leads to a substantial reduction in computational cost without loss of estimation accuracy.
Keywords :
Doppler radar; antenna arrays; array signal processing; direction-of-arrival estimation; frequency estimation; radar antennas; radar signal processing; 1-D problems; 2-D frequency estimation; DOA; Doppler frequencies; array antenna; asymptotic 2-D Cramer-Rao bound; asymptotically decoupled angle-frequency estimation; computational cost; directions of arrival; multiple targets; pulsed Doppler radar; sensor arrays; temporal snapshots; Antenna arrays; Computational efficiency; Direction of arrival estimation; Directive antennas; Doppler radar; Frequency estimation; Maximum likelihood estimation; Radar antennas; Radar cross section; Sensor arrays;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Signals, Systems, and Computers, 1999. Conference Record of the Thirty-Third Asilomar Conference on
Conference_Location :
Pacific Grove, CA, USA
ISSN :
1058-6393
Print_ISBN :
0-7803-5700-0
Type :
conf
DOI :
10.1109/ACSSC.1999.831879
Filename :
831879
Link To Document :
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