Phase coordinated multistage digital filter

Details Phase coordinated multistage digital filter Phase coordinated multistage digital filter

1987-04-03

1989-05-30

Malzahn, David H.

Boots, shoes, and leggings

3647241, G06F 1531

Patent

active

048357235

ABSTRACT:
In a cascaded system of finite-duration impulse response filters, the transfer function of each filter relating its output data sequence to its input data sequence is selected such that elements of its output data sequence are in phase with the first element of its input data sequence. Operation of each filter other than the first cascaded filter is suppressed until it receives from the preceding filter, the first output data sequence element which is in phase with the first element of the input data sequence of the preceding stage, thereby ensuring that the first element of the output data sequence of the first filter is in phase with the first element of the input sequence to the first filter.

REFERENCES:
patent: 3988607 (1976-10-01), Eggermont et al.
patent: 4020332 (1977-04-01), Crochiere et al.
patent: 4701874 (1987-10-01), Akai et al.
Crochiere et al., "Optimum FIR Digital Filter Implementations for Decimation, Interpolation, and Narrow-Band Filtering" IEEE Trans. on Acoustics, Speech, and Signal Processing vol. ASSP-23, No. 5 Oct. 1975 pp. 444-456 364/724.

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