Title :
Sine wave responses of median type filters
Author :
Neejärvi, Jukka ; Heinonen, Pekka ; Neuvo, Yrjo
Author_Institution :
Dept. of Electr. Eng., Tampere Univ. Technol., Finland
Abstract :
The authors analyze the amplitude and phase responses of median type filters using sinusoidal input signals. The filter types studied are the standard median (SM) filters and FIR (finite impulse response) median hybrid (FMH) filters. The overall behavior of the sine wave response of the FMH filter is like that of a low-pass filter characterized roughly by the responses of the linear filters. The FMH filters were shown to provide a significantly better stopband attenuation than the SM filters. The results obtained by varying the input signal phase clearly indicate that, especially for the SM filters, an average response is not a sufficient characterization of the filters.<>
Keywords :
digital filters; filtering and prediction theory; FIR median hybrid filters; amplitude response; digital filters; finite impulse response; median type filters; nonlinear filtering; phase responses; sine wave response; sinusoidal input signals; standard median filters; stopband attenuation; Digital filters; Filtering; Finite impulse response filter; Frequency; Noise level; Noise reduction; Nonlinear filters; Samarium; Sampling methods; Signal analysis;
Conference_Titel :
Circuits and Systems, 1988., IEEE International Symposium on
Conference_Location :
Espoo, Finland
DOI :
10.1109/ISCAS.1988.15215
