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AN ADAPTIVE BEAMFORMER BASED ON ADAPTIVE COVARIANCE ESTIMATOR

By L. T. Ong

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Abstract:
Based on the Minimum Variance Distortionless Response-Sample Matrix Inversion (MVDR-SMI) method, we propose a novel Adaptive Covariance Estimator (MVDR-ACE) beamformer for adaptation to multiple interference environments. The MVDR-ACE beamformer iteratively determines a minimum number of data samples required while maintaining its average signal-to-interference-noise to be within 3dB from the performance of a theoretical optimum MVDR beamformer and meeting an instantaneous interference cancellation requirement. Finally, based on numerical simulations, we analyze and validate the performance of the MVDR-ACE beamformer. We also compare its performance to the conventional MVDR-SMI beamformer that uses a fixed data sample in its covariance estimator.

Citation:
L. T. Ong, "An Adaptive Beamformer Based on Adaptive Covariance Estimator," Progress In Electromagnetics Research M, Vol. 36, 149-160, 2014.
doi:10.2528/PIERM14032409

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