Derive crosstalk limit from ICR

The evolution of high speed serial interconnect standards exhibits the need of shifting to other more comprehensive crosstalk metrics than the conventional simple NEXT/FEXT. Among the new substitutes ICR, ICN, and COM, ICR is widely adopted in recent industry standards (802.3ap, OIF-CEI-3.1, SAS 3.0, etc.) for its ease to apply and intuitive representation of channel performance. For the time being, the conventional crosstalk metrics is still a useful evaluating measure for many situations. This paper explores the methodology of deriving conventional crosstalk limit from the ICR specification of 10GBASE-KR and has some interesting findings on the derived crosstalk requirement.