Decoupled estimation of DOA and coherence loss for multiple sources in uncertain propagation environments
J. Ringelstein, L. Schmitt, J.F. Bhome · 2002
The problem of direction of arrival (DOA) estimation of multiple sources is addressed considering possible coherence loss along the impinging wavefronts. The loss results from wave propagation through a fluctuating medium and leads to a decreasing signal correlation from sensor to sensor. Two new algorithms are proposed that are significantly less computationally complex than the well known covariance matching (CM) approach. Furthermore a polynomial approximation of the coherence loss parameters is introduced, which pen-nits a decoupling of the DOA estimation from the estimation of all other parameters. The proposed algorithms and theoretical results are verified by numerical examples.