Modified Realization Technique for Digital Filters Derived from Analog Counterparts
✍ Scribed by S. Erfani; M. Ahmadi; V. Ramachandran
- Publisher
- Elsevier Science
- Year
- 1986
- Tongue
- English
- Weight
- 628 KB
- Volume
- 322
- Category
- Article
- ISSN
- 0016-0032
No coin nor oath required. For personal study only.
✦ Synopsis
A simple realization scheme for one-dimensional and two-dimensional recursive digital filters derived from analog reference transfer functions is presented. The method is based on proper predistortion of the analog transfer function to obtain a new Hurwitz polynomial. Analog-to-digital transformations, such as the bilinear transformation, are then applied to the resulting predistorted reference transfer function to obtain the discrete version of the system. It is shown that a proper choice of the predistorting function will yield digital realizations which are free of the delay-free loops and in most cases are near minimal. To illustrate the simplicity and eficiency of the technique, examples of 1-D and 2-D cases are worked out. The proposed scheme can readily be extended to include the multi-dimensional case.
I. Zntroductiorz