Title :
Maximum likelihood estimation for angles of arrival of coherent signals using a coherency profile
Author_Institution :
Sch. of Inf. & Commun. Eng., Dongyang Univ., Youngju Kyungbook, South Korea
fDate :
9/1/2000 12:00:00 AM
Abstract :
This article addresses an ML estimation problem by introducing a coherency profile, which means the sizes of the coherent signal groups. We present the Cramer-Rao (CR) bounds for the estimation. An algorithm for implementing it is proposed based on the alternating maximization. Simulation results show that the performance improvement of the estimator over the conventional ML is significant, even with a small number of samples in low SNR
Keywords :
array signal processing; direction-of-arrival estimation; maximum likelihood estimation; optimisation; Cramer-Rao bounds; ML estimation; MLE; algorithm; alternating maximization; angles of arrival estimation; array signal processing; coherency profile; coherent signal groups; linear array; low SNR; maximum likelihood estimation; performance improvement; simulation results; Chromium; Computational modeling; Maximum likelihood estimation; Multidimensional systems; Multiple signal classification; Sensor arrays; Signal processing; Signal resolution; Smoothing methods; Spatial resolution;
Journal_Title :
Signal Processing, IEEE Transactions on
