Minimizing crosstalk noise in vias or pins by optimizing signal assignment in a high-speed differential bus

Vias in packages and boards, land-grid-array pins, and connector pins introduce significant crosstalk in high-speed differential buses. There are many possible differential signal assignments in those areas that have very different electrical performance. This paper proposes and demonstrates an efficient method to find a large number of possible assignments and assess them to obtain an optimal assignment with the best performance.