Estimation of spectral parameters of correlated signals in wavefields
Signal Processing
Fundamentals of statistical signal processing: estimation theory
Fundamentals of statistical signal processing: estimation theory
DOA Estimation using fast EM and SAGE Algorithms
Signal Processing - Image and Video Coding beyond Standards
Maximum-likelihood direction-of-arrival estimation in the presenceof unknown nonuniform noise
IEEE Transactions on Signal Processing
Detection and localization in colored noise via generalized leastsquares
IEEE Transactions on Signal Processing
Mean likelihood frequency estimation
IEEE Transactions on Signal Processing
IEEE Transactions on Signal Processing
Maximum likelihood estimation for array processing in colored noise
IEEE Transactions on Signal Processing
Direction finding using noise covariance modeling
IEEE Transactions on Signal Processing
A fast high-resolution method for bearing estimation in shallow ocean
Multidimensional Systems and Signal Processing
An Empirical Study of Collaborative Acoustic Source Localization
Journal of Signal Processing Systems
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We investigate the maximum likelihood (ML) direction-of-arrival (DOA) estimation of multiple wideband sources in the presence of unknown nonuniform sensor noise. New closed-form expression for the direction estimation Cramér-Rao-Bound (CRB) has been derived. The performance of the conventional wideband uniform ML estimator under nonuniform noise has been studied. In order to mitigate the performance degradation caused by the nonuniformity of the noise, a new deterministic wide-band nonuniform ML DOA estimator is derived and two associated processing algorithms are proposed. The first algorithm is based on an iterative procedure which stepwise concentrates the log-likelihood function with respect to the DOAs and the noise nuisance parameters, while the second is a noniterative algorithm that maximizes the derived approximately concentrated log-likelihood function. The performance of the proposed algorithms is tested through extensive computer simulations. Simulation results show the stepwise-concentrated ML algorithm (SC-ML) requires only a few iterations to converge and both the SC-ML and the approximately-concentrated ML algorithm (AC-ML) attain a solution close to the derived CRB at high signal-to-noise ratio.