Finite data performance analysis of MVDR beamformer with spatial smoothing

Author

Raghunath, K. ; Reddy, V.

Author_Institution

Dept. of Electr. Commun. Eng., Indian Inst. of Sci., Bangalore, India

fYear

1990

fDate

10-12 Oct. 1990

Firstpage

367

Lastpage

371

Abstract

Analyzes the finite-data performance of MVDR beamformer with spatial smoothing, using first order perturbation theory. In particular, the authors develop expressions for the mean values of the power gain in any direction of interest, the output power and the norm of the weight-error vector, as a function of the number of snapshots and the number of smoothing steps. They simplify these expressions for a single interference case without smoothing to show explicitly how the SNR, spacing of the interference from the desired signal and the correlation between them influence the beamformer performance. Simulations are used to verify the usefulness of the theoretical expressions and the results show an excellent agreement with predicted results.<>

Keywords

perturbation techniques; signal processing; MVDR beamformer; SNR; array processing; finite data performance analysis; first order perturbation theory; interference; mean values; minimum variance distortionless response beamformer; output power; power gain; spatial smoothing; weight-error vector norm; Covariance matrix; Distortion; Interference; Performance analysis; Power engineering and energy; Power generation; Predictive models; Radar; Smoothing methods; Sonar;

fLanguage

English

Publisher

ieee

Conference_Titel

Spectrum Estimation and Modeling, 1990., Fifth ASSP Workshop on

Conference_Location

Rochester, NY, USA

Type

conf

DOI

10.1109/SPECT.1990.205525

Filename

205525