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Minimum Variance Distortionless Response Beamformer Software

capon or mvdr beamformer

MVDR beamformer maintains a distortionless mainlobe response toward the desired signal

VOCAL’s Minimum Variance Distortionless Response (MVDR) Beamformer software, also known as the Capon Beamformer, is used for speech enhancement applications, including noise reduction and speech dereverberation.  The MVDR beamformer software package includes a beamforming algorithm to dynamically steer a beam at the source location.  A source localization algorithm is also available to provide the beamformer with the source location coordinates.

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Our MVDR beamformer software may be licensed as a standalone algorithm or library with custom solutions available. Contact us to discuss your beamforming application requirements.

MVDR Beamformer

The Minimum Variance Distortionless Response (MVDR) beamformer minimizes the array output power and maintains a distortionless mainlobe response toward the desired signal. The weighting vector of the MVDR beamformer is determined by:

wMVDR = argw min(wHRxw), subject to wHa(ϴ0) = 1 [2]


  • Rx is the covariance matrix of the received signal vector x(k),
  • wHa(ϴ0) = 1 is the distortionless constraint applied to the signal of interest, and
  • a is a steering vector at direction ϴ.

More Information


[1] J. Li, J. Chen, and P. Stoica, ”Robust Adaptive Beamformer”, hoboken, New Jersey, John Wiley & Sons, 2006.

[2] Y. Liu, and Q. Wan, ”A Robust Beamformer Based On Weighted Sparse Constraint”, Progress in Electromagnetics Research Letters, Vol. 16, 53-60, 2010.

VOCAL Technologies, Ltd.
520 Lee Entrance, Suite 202
Amherst New York 14228
Phone: +1-716-688-4675
Fax: +1-716-639-0713