학술논문
Design of 2D IIR digital filters with approximately flat group delay characteristic
Document Type
Conference
Author
Source
5th International Conference on Telecommunications in Modern Satellite, Cable and Broadcasting Service. TELSIKS 2001. Proceedings of Papers (Cat. No.01EX517) Telecommunications in modern satellite, cable and broadcasting service Telecommunications in Modern Satellite, Cable and Broadcasting Service, 2001. TELSIKS 2001. 5th International Conference on. 2:807-810 vol.2 2001
Subject
Language
Abstract
The procedure for designing two-dimensional recursive digital filters with controllable amplitude characteristic and flat group delay characteristic is presented. It is necessary first to make a maximally flat group delay one-dimensional IIR filter with the proposed amplitude characteristic. A stable two-dimensional IIR transfer function is obtained using a digital spectral transformation. The way of obtaining the parameters for the digital spectral transformation is also given. This method does not need nonlinear optimization techniques. The obtained two-dimensional filter is guaranteed to be stable, the error between the specified passband contour is very small and the amplitude and group delay characteristic of the one-dimensional prototype are well preserved by the two-dimensional filter.