An FIR filter as pre-emphasis has been used to counteract intersymbol interference (ISI) in high-speed backplane data transmission. A MATLAB program has been developed for optimisation of the FIR filter under LMS criterion. Both a symbol-spaced FIR (SSF) filter and fractionally spaced FIR (FSF) filter are comparatively studied. The determination of tap number and preference of FSF to SSF are discussed.

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Journal Electronics Letters
Li, M., Wang, S., Tao, Y., & Kwasniewski, T. (2004). FIR filter optimisation as pre-emphasis of high-speed backplane data transmission. Electronics Letters, 40(14), 912–913. doi:10.1049/el:20040567