FIELD: technology for digital processing of signal, possible use in systems for digital processing of signal.
SUBSTANCE: the frequency filter contains controlling block, memory matrix, memory of filter coefficients, data commutation block, output data generation block, table search block for cyclic multipliers and at least one high speed arithmetic device. In the filtration method, in frequency area overlapping and preservation is performed of each data segment of time area, which is subject to filtration, in high speed arithmetic device in different time moments Fourier transformations are performed, filtration operations in frequency area and reverse Fourier transformations for each overlapping data segment in time area, preserved in memory matrix, preservation of data segments of time zone, which have been processed by filtration operations, in memory block of memory matrix, each data segment of time area is read into series, each read data segment of time area is overlapped in reverse manner to create completely filtered output data of the time area.
EFFECT: improved filtration, reduced time of delay in the filter.
2 cl, 8 dwg
