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Maximum likelihood estimation for array processing in colored noise

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2 Author(s)
Nagesha, V. ; Dragon Syst. Inc., Newton, MA, USA ; Kay, S.

Direction of arrival estimation of multiple sources, using a uniform linear array, in noise with unknown covariance is considered. The noise is modeled as a spatial autoregressive process with unknown parameters. Both stochastic and deterministic signal models are considered. For the random signal case, an approximate maximum likelihood estimator of the signal and noise parameters is derived. It requires numerical maximization of a compressed likelihood function over the unknown arrival angles. Analytical expressions for the MLEs of the signal covariance and the AR parameters are given. Similar results for the case of deterministic signals are also presented

Published in:

Signal Processing, IEEE Transactions on  (Volume:44 ,  Issue: 2 )

Date of Publication:

Feb 1996

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