Title :
Pruning the decimation-in-time FFT algorithm with frequency shift
Author :
Nagai, Keinosuke
Author_Institution :
University of Tsukuba, Ibaraki, Japan
fDate :
8/1/1986 12:00:00 AM
Abstract :
Fourier transformed components within desired narrow-band can be efficiently calculated by the pruned version of the decimation-in-time FFT algorithm. A new pruning method is proposed here which invloves frequency shift. The shifting simplifies the pruning algorithm because its flowgraph has a repetitive pattern of butterflies between adjacent stages.
Keywords :
Acoustic measurements; Delay effects; Discrete Fourier transforms; Frequency; Least squares approximation; Quantization; Sampling methods; Signal processing algorithms; Temperature; Time measurement;
Journal_Title :
Acoustics, Speech and Signal Processing, IEEE Transactions on
DOI :
10.1109/TASSP.1986.1164900
