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A map based estimator for inverse complex covariance matricies

M.L. Nordenvaad ; Lennart Svensson (Institutionen för signaler och system, Signalbehandling)
2012 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2012. Kyoto, 25 - 30 March 2012 (1520-6149). p. 3369-3372. (2012)
[Konferensbidrag, refereegranskat]

A novel approach to estimate (inverse) complex covariance matrices is proposed. By considering the class of unitary invariant estimators, the main challenge lies in estimating the underlying eigenvalues from sampled versions. By exploiting that the distribution of the sample eigenvalues can be derived in closed form, a Maximum A Posteriori (MAP) based scheme is then derived. The performance of the derived estimator is simulated and results indicate that the proposed scheme shows performance similar to one of the best estimators known to date. The main advantage lies in that the proposed solution only requires numerical optimization over a P-dimensional space where P is the size of the covariance matrix.

Nyckelord: Closed form, Complex covariance, Eigenvalues, Maximum a posteriori, Numerical optimizations, Sample eigenvalues



Denna post skapades 2012-11-14. Senast ändrad 2016-07-21.
CPL Pubid: 166043

 

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Institutioner (Chalmers)

Institutionen för signaler och system, Signalbehandling

Ämnesområden

Signalbehandling

Chalmers infrastruktur