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.

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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.