Title :
Allpass and lattice bilinear digital ladder filters
Author :
Harnefors, Lennart ; Signell, Svante ; Mossberg, Kåre
Author_Institution :
Dept. of Electr. Eng, Malardalen Univ., Vasteras, Sweden
Abstract :
A new design method for allpass bilinear digital ladder filters is presented. The method can be used for design of lattice filters; odd order lowpass filters as well as filters that can be obtained from these by frequency transformations. The resulting structure has a canonical number of multipliers and delays. The filter coefficients are obtained from the coefficients of the desired pole polynomial using simple recursion formulas. A design example for a fifth order elliptic lowpass filter is given, and the filter is analyzed and compared to a lattice wave digital realization
Keywords :
all-pass filters; delays; digital filters; elliptic filters; ladder filters; lattice filters; low-pass filters; multiplying circuits; nonlinear filters; allpass filters; bilinear digital ladder filters; canonical number; delays; fifth order elliptic filter; filter coefficients; lattice filters; multipliers; odd order lowpass filters; pole polynomial; recursion formulas; Band pass filters; Concurrent computing; Delay; Design methodology; Digital filters; Frequency; Lattices; Passive filters; Prototypes; Quantization;
Conference_Titel :
Circuits and Systems, 1996. ISCAS '96., Connecting the World., 1996 IEEE International Symposium on
Conference_Location :
Atlanta, GA
Print_ISBN :
0-7803-3073-0
DOI :
10.1109/ISCAS.1996.541729
