Title :
On the frequency-domain properties of Savitzky-Golay filters
Author :
Schafer, Ronald W.
Author_Institution :
Hewlett-Packard Labs., Palo Alto, CA, USA
Abstract :
This paper is concerned with the frequency-domain properties of the so called Savitzky-Golay lowpass filters, which are based on the principle of local least-squares fitting of a polynomial. A summary of the important frequency-domain properties is given along with an empirically-derived formula for 3 dB cutoff frequency as a function of polynomial order N and impulse response half-length M.
Keywords :
frequency-domain analysis; least squares approximations; low-pass filters; polynomial approximation; Savitzky-Golay filters; frequency-domain properties; impulse response; lowpass filters; polynomial least square fitting; Approximation methods; Cutoff frequency; Frequency domain analysis; Frequency response; Polynomials; Smoothing methods; Savitzky-Golay filter; least-squares polynomial approximation; smoothing;
Conference_Titel :
Digital Signal Processing Workshop and IEEE Signal Processing Education Workshop (DSP/SPE), 2011 IEEE
Conference_Location :
Sedona, AZ
Print_ISBN :
978-1-61284-226-4
DOI :
10.1109/DSP-SPE.2011.5739186
