Wave-number-frequency adaptive beamforming
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United States of America Patent
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Mar 3, 1998
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app pub date -
Aug 26, 1996
filing date -
Aug 26, 1996
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Abstract
Wave-number-frequency adaptive beamforming using a reduced rank k-.omega. matrix method. A spatial Fourier transform of the narrowband receiver outputs for the sensors in a linear array is taken to enter the wave number space and generate M independent spatial wave number beams w. The spatial FFT outputs are used to form the entries in a matrix of eigenvectors, wherein the k-th eigenvector represents a set of spatial convolution coefficients. The spatial wave number beams are weighted in an adaptation process by the spatial convolution coefficients to form a beam steered in the direction of a k-th signal source.
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