Desensitizing Halfband Interpolation Filters

Speaker: Professor Alan WillsonElectrical Engineering Department
University of California, Los Angeles, CaliforniaABSTRACTA very common component in digital circuitry for communications systems is the halfband filter. Halfband filters are often used in cooperation with up-samplers and down-samplers when a sampling-rate change is required. While techniques for designing these filters are well known, an entirely new design method has just been discovered wherein these filters can be made to possess a significant desensitivity to the filter's tap coefficient values. Such desensitivity can be exploited to yield halfband filters with reduced hardware requirements, which leads to circuits having lower power consumption, higher operating speeds, and smaller IC area. This talk will give a brief introduction to the concept of halfband filters and the applications of halfband filters. It will then explain the rationale and the method for the desensitizing of the filters and, finally, will illustrate through design examples and further explanation how the desensitivity improves upon the conventional designs.BIOGRAPHYDr. Alan N. Willson, Jr. is a Distinguished Professor of Electrical Engineering at UCLA. He served as Assistant Dean for Graduate Studies in the UCLA School of Engineering and Applied Science from 1977 through 1981, and served as Associate Dean of Engineering from 1987 through 2001. He has been engaged in research concerning computer-aided circuit analysis and design, the stability of distributed circuits, properties of nonlinear networks, theory of active circuits, digital signal processing, analog circuit fault diagnosis, and integrated circuits for signal processing. He is editor of Nonlinear Networks: Theory and Analysis (New York: IEEE Press, 1974). In 1991, he founded Pentomics, Inc. Dr. Willson served as editor of the IEEE Transactions on Circuits and Systems from 1977 to 1979 and as President of the IEEE Circuits and Systems (CAS) Society in 1984. He was the recipient of the 1978 and 1994 Guillemin-Cauer Awards of the IEEE CAS Society, the 1982 George Westinghouse Award of the American Society for Engineering Education, the 1982 Distinguished Faculty Award of the UCLA Engineering Alumni Association, the 1984 Myril B. Reed Best Paper Award of the Midwest Symposium on CAS, the 1985 and 1994 W. R. G. Baker Awards of the IEEE, the 2000 Technical Achievement Award and the 2003 Mac Van Valkenburg Award of the IEEE CAS Society. In 2007 he and his recent Ph.D. student, Guichang Zhong, were winners of the 44th DAC/ISSCC Student Design Contest.HOST: Professor Sanjit K. Mitra

Location: Hughes Aircraft Electrical Engineering Center (EEB) - 248

Audiences: Everyone Is Invited

Contact: Talyia Veal