High speed FFT processor

Details High speed FFT processor High speed FFT processor

1977-11-07

1979-02-06

Smith, Jerry

Boots, shoes, and leggings

G06F 1534

Patent

active

041387309

ABSTRACT:
An FDM/TDM transmultiplexer uses sampling rate multiplication to increase the sampling rate for time division multiplexed (TDM) to frequency division multiplexed (FDM) conversion and decrease the sampling rate for FDM to TDM conversion. The rate multiplication filters are realized digitally in order to exploit the computational advantage of Fast Fourier Transform (FFT) algorithm, and channel filtering is implemented by a single time-shared sixth-order elliptic digital recursive filter. A novel FFT processor and recursive filter are disclosed which may be used in the system.

REFERENCES:
patent: 3871577 (1975-03-01), Avellar et al.
patent: 3881100 (1975-04-01), Works et al.
patent: 3965342 (1976-06-01), Constant
patent: 4027257 (1977-05-01), Perreault

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