On the Use of Windows for Harmonic Analysis with the Discrete Fourier Transform

Abstract

This paper makes available a concise review of data windows and their affect on die detection of harmonic signals in the presence of broad-band noise, and in die presence of nearby strong harmonic interference. We also call attention to a number of common errors in the application of windows when used with the fast Fourier transform. This paper includes a comprehensive catalog of data windows along with their significant performance parameters from which the different windows can be compared. Finally, an example demonstrates the use and value of windows to resolve closely spaced harmonic signals characterized by large differences in amplitude. Copyright © 1978 by The Institute of Electrical and Electronics Engineers, Inc.