Title :
On the design and realization of a class of tunable 2-D digital filters
Author :
Nie, Xiaoning ; Unbehauen, Rolf ; Anhaupl, B.
Author_Institution :
Lehrstuhl fuer Allgemeine und Theoretische Elektrotechnik, Erlangen-Nurnberg Univ., Erlangen, Germany
Abstract :
The extended McClellan transformation has been applied to transform a 1-D zero-phase FIR (finite impulse response) filter into a 2-D tunable zero-phase IIR (infinite impulse response) filter. By tuning a few parameters, one can obtain a class of 2-D filters with various band edge contours of nearly elliptic or nearly circular symmetry. This class of filters has been realized as a cascade of an anti-causal IIR filter and a causal all-pass filter. This realization shows two advantages: the quantization noise due to the finite word length is relatively low and scaling of the 2-D structure is no longer necessary
Keywords :
all-pass filters; filtering and prediction theory; tuning; two-dimensional digital filters; 1D FIR filter; 2D filters; anticausal filter; causal all-pass filter; circular symmetry; digital filters; elliptic symmetry; extended McClellan transformation; finite word length; infinite impulse response; quantization noise; tunable filters; zero-phase; Band pass filters; Chebyshev approximation; Digital filters; Finite impulse response filter; Frequency response; IIR filters; Polynomials; Prototypes; Quantization; Transfer functions;
Conference_Titel :
Circuits and Systems, 1991., IEEE International Sympoisum on
Print_ISBN :
0-7803-0050-5
DOI :
10.1109/ISCAS.1991.176371
