Cramer--Rao bound of spatio-temporal linear pre-processing in parameter estimation from sensor array
Signal Processing - Special issue on independent components analysis and beyond
EURASIP Journal on Advances in Signal Processing
Localization of narrow-band sources in unknown spatially correlated noise
EURASIP Journal on Advances in Signal Processing
| Hi-index | 35.68 |
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