Asymptotically Decoupled Angle-Frequency Estimation with Sensor Arrays
Paper i proceeding, 1999
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.
Chalmers, Signaler och system, Signalbehandling och medicinsk teknik, Signalbehandling
Proc. 33rd Asilomar Conference on Signals, Systems, and Computers, Pacific Grove, CA, USA