Title :
Orthogonally aliased fourier transforms for the analysis of sparsely populated frequency spectra
Author_Institution :
Government Communications Headquarters, Cheltenham, UK
fDate :
6/1/1977 12:00:00 AM
Abstract :
A trick permits the use of several aliased fast Fourier transforms (f.f.t.) in place of a single unambiguous f.f.t. If the proportion of active spectral lines, or directions of arrival, is well under 1%, their location, but not the amplitude, can then be computed with a dramatically reduced workload.
Keywords :
fast Fourier transforms; spectral analysis; FFT; sparsely populated frequency spectra; spectral analysis;
Journal_Title :
Electrical Engineers, Proceedings of the Institution of
DOI :
10.1049/piee.1977.0100
