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The Scientist and Engineer's
Guide to Digital Signal Processing
by Steven W. Smith
California Technical Publishing
ISBN 0-9660176-3-3 (1997)
Chapter 16. Windowed-Sinc Filters
- Strategy of the Windowed-Sinc
- Designing the Filter
- Examples of Windowed-Sinc Filters
- Pushing it to the Limit
- Summary of the key concepts
Windowed-sinc filters are used to separate one band of frequencies from another. They
are very stable, produce few surprises, and can be pushed to incredible performance
levels. These exceptional frequency domain characteristics are obtained at the expense
of poor performance in the time domain, including excessive ripple and overshoot in the
step response. When carried out by standard convolution, windowed-sinc filters are easy
to program, but slow to execute. Chapter 18 shows how the FFT can be used to
dramatically improve the computational speed of these filters.
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