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Asymptotically Decoupled Angle-Frequency Estimation with Sensor Arrays

Fredrik Athley (Institutionen för signaler och system, Signalbehandling)
Proc. 33rd Asilomar Conference on Signals, Systems, and Computers, Pacific Grove, CA, USA (1999)
[Konferensbidrag, refereegranskat]

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.



Denna post skapades 2006-08-25. Senast ändrad 2013-06-17.
CPL Pubid: 16029

 

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Institutioner (Chalmers)

Institutionen för signaler och system, Signalbehandling

Ämnesområden

Information Technology

Chalmers infrastruktur