System and method for signal processing using an improved convolution technique
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United States of America Patent
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Sep 23, 2003
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app pub date -
May 23, 2000
filing date -
May 23, 2000
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Abstract
A system (100) for signal processing using one or more filters includes a controller (102) that partitions an impulse response of a filter into a plurality of impulse response blocks and calculates a Discrete Fourier Transform (DFT) of each impulse response block using a Fast Fourier Transform (FFT) algorithm. A processor (104) that is coupled to the controller (102) receives an input sample block including samples of a signal to be processed and receives the DFT of each impulse response block from the controller (102). The processor (104) calculates a DFT of the input sample block using an FFT algorithm, performs a spectral multiplication of the DFT of the input sample block with the DFT of each impulse response block, overlap-adds the blocks resulting from each spectral multiplication to create an output spectral block, performs an inverse FFT on the output spectral block to create an output sample block, and communicates the output sample block.
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