Method of performing real input fast fourier transforms simultan

Details Method of performing real input fast fourier transforms simultan Method of performing real input fast fourier transforms simultan

1983-12-27

1986-09-16

Malzahn, David H.

Boots, shoes, and leggings

G06F 15332

Patent

active

046126260

ABSTRACT:
Simultaneous FFT's are calculated for two real input sequences utilizing a two channel recursive FFT structure. The method of operating such a structure disclosed includes the log.sub.2 N stages (for an N-point transform) known in the prior art plus a final unscrambling stage. A method of arranging the outputs of the log.sub.2 N-th stage for use as inputs to the unscrambling stage is disclosed which results in substantially unscrambled FFT outputs for the two sequences without the need for extra unscrambling hardware.

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