Minimum Variance Distortionless Response Beamformer in Beamforming Algorithms
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The article discusses the implementation of beamforming algorithms using the Minimum Variance Distortionless Response (MVDR) beamformer, which minimizes output power while maintaining distortionless response in the desired direction. This can be achieved through MATLAB's phased.MVDRBeamformer function or custom implementation using sample matrix inversion. Additionally, the comparison between conventional delay-and-sum beamforming and MVDR beamforming is visually demonstrated by plotting both waveform patterns in the same figure, allowing for direct observation of MVDR's superior interference suppression capabilities and narrower mainlobe characteristics. The implementation typically involves calculating array weights using R^(-1)*a/(a'*R^(-1)*a) where R is the covariance matrix and a is the steering vector.
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