Partitioned fast convolution in the time and frequency domain

Details Partitioned fast convolution in the time and frequency domain Partitioned fast convolution in the time and frequency domain

H - Electricity

04

B

H04B 3/20 (2006.01) H03H 17/02 (2006.01) H03M 13/23 (2006.01) H04B 3/23 (2006.01) H04M 9/08 (2006.01)

Patent

CA 2593183

The present invention relates to a method for processing a digital input signal by a Finite Impulse Response, FIR, filtering means, comprising partitioning the digital input signal at least partly in the time domain to obtain at least two partitions of the digital input signal; partitioning the FIR filtering means in the time domain to obtain at least two partitions of the FIR filtering means; Fourier transforming each of the at least two partitions of the digital input signal to obtain Fourier transformed signal partitions; Fourier transforming each of the at least two partitions of the FIR filtering means to obtain Fourier transformed filter partitions; performing a convolution of the Fourier transformed signal partitions and the corresponding Fourier transformed filter partitions to obtain spectral partitions; combining the spectral partitions to obtain a total spectrum; and inverse Fourier transforming the total spectrum to obtain a digital output signal.

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