synthesizing optimal filters for crosstalk-cancellation for high-speed buses
We present practical algorithms for the synthesis of crosstalk cancelling equalizing filters. We examine designs optimized for the traditional l2 metric and introduce an approach based on the l? metric. We compare the two approaches for realistic buses with tight wire spacings. We show bandwidth improvements of up to a factor of 2 using crosstalk cancellation when compared with no filtering or independent pre-emphasis for each wire. Using l? optimization, we achieve roughly 50\% better performance than the l2 methods. We are aware of only one other published description of crosstalk cancellation for high-performance buses [9]. We believe that our work is the first to show the advantages of l? optimization and to consider crosstalk cancellation for more than just nearest neighbours for high-speed buses.
crosstalk buses equalizing filters optimal synthesis