NASA NTRS · 19940010171
A rational interpolation method to compute frequency response
Abstract
A rational interpolation method for approximating a frequency response is presented. The method is based on a product formulation of finite differences, thereby avoiding the numerical problems incurred by near-equal-valued subtraction. Also, resonant pole and zero cancellation schemes are developed that increase the accuracy and efficiency of the interpolation method. Selection techniques of interpolation points are also discussed.
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Kenney, Charles, Stubberud, Stephen, Laub, Alan J.. 1993-02-15. A rational interpolation method to compute frequency response. https://ntrs.nasa.gov/citations/19940010171
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