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Stationary phase approximation for performing Fourier Transforms

version (2.8 KB) by Adam Wyatt
Performs a Fourier Transform of a function using the stationary phase approximation


Updated 01 Aug 2008

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This function allows one to calculate the Fourier transform of a chirped function evaluated at specific points using the stationary phase approximation.

Imagine a pulse with a large time-bandwidth produce: this would require a large amount of data points in order to evaluate the Fourier transform. Lets imagine that you only needed to know the FT at specific points, or over a limited range, then clearly a DFT (FFT) would result in unwanted calculations and may not be possible due to memory constraints. Proper use of this function can result in a dramatic reduction in calculation time and memory requirements.

Cite As

Adam Wyatt (2020). Stationary phase approximation for performing Fourier Transforms (, MATLAB Central File Exchange. Retrieved .

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MATLAB Release Compatibility
Created with R2008a
Compatible with any release
Platform Compatibility
Windows macOS Linux