Arithmetic unit for DFT and/or IDFT computation

Details Arithmetic unit for DFT and/or IDFT computation Arithmetic unit for DFT and/or IDFT computation

1976-04-20

1978-03-21

Malzahn, David H.

Boots, shoes, and leggings

324 77B, G06F 1534

Patent

active

040806618

ABSTRACT:
An arithmetic unit for performing the operation of multiplying input data by successive powers of a constant and accumulating the products represented by ##EQU1## WHERE .alpha. IS A CONSTANT, IS DISCLOSED. The arithmetic unit includes a recursive path which does not necessitate a multiplier, and operations which really necessitate multiplication are carried out only when the input data have substantially entered this recursive path thereby substantially reducing the number of multiplications required. The arithmetic unit has particular application in performing DFT (Discrete Fourier Transform) or IDFT (Inverse Discrete Fourtier Transform).

REFERENCES:
patent: 3683162 (1972-08-01), Jacob et al.
patent: 3803390 (1974-04-01), Schappman
patent: 3961167 (1976-06-01), Mills

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