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ROBUST ADAPTIVE BEAMFORMING WITH ENHANCED NOISE SUPPRESSION

  • US 20080232607A1
  • Filed: 03/22/2007
  • Published: 09/25/2008
  • Est. Priority Date: 03/22/2007
  • Status: Active Grant
First Claim
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1. A computer-implemented process for improving the signal to noise ratio of one or more signals from sensors of a sensor array, comprising:

  • inputting signals of sensors of a sensor array in the frequency domain defined by frequency bins and a time frame index;

    computing a beamformer output as function of the input signals divided into k frequency bins and the time frame index;

    estimating a desired signal by taking the product of the beamformer output and the probability that the beamformer output contains the desired signal at a given target angle region;

    using the estimated desired signal as a reference signal and subtracting components that are correlated to the estimated desired signal from the input signals to obtain interference signals;

    subtracting the interference signals from the beamformer output to produce an output signal with an increased signal to noise ratio.

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