Orthogonally aliased fourier transforms for the analysis of sparsely populated frequency spectra
- 1 January 1977
- journal article
- Published by Institution of Engineering and Technology (IET) in Proceedings of the Institution of Electrical Engineers
- Vol. 124 (6) , 508-510
- https://doi.org/10.1049/piee.1977.0100
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
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