FIR filter pre-emphasis has been used to counteract inter-symbol interference (ISI) in high-speed backplane data transmission. In this paper, backplane channel characteristics are first analyzed. It is found that channel group delay distortion is also a major ISI contributor in addition to amplitude attenuation. A MATLAB program is then described for optimization of FIR filter under LMS criterion. Both symbol-spaced FIR (SSF) and fractionally spaced FIR (FSF) are comparatively studied at different data rates. The determination of tap number and preference of FSF to SSF are discussed.

Backplane, FIR filter, ISI, LMS, Pre-emphasis
2004 International Conference on Communications, Circuits and Systems
Department of Electronics

Li, M. (Miao), Kwasniewski, T, Wang, S. (Shoujun), & Tao, Y. (Yuming). (2004). FIR filter optimization as pre-emphasis of high-speed backplane data transmission. Presented at the 2004 International Conference on Communications, Circuits and Systems.