APPARATUS AND METHOD FOR MEASURING CROSS-CORRELATION COEFFICIENT BETWEEN SIGNALS

摘要

Timing jitter sequences Deltaϕ[n] and Deltaϕ[n] of respective clock signals under measurement xj(t) and xk(t) are obtained, and a covariance sigmatj,tk=(1/N)Sigmai=1Deltaϕ[i].Deltaϕ[i] is obtained. In addition, root-mean-square values sigmatj and sigmatk of the respective Deltaϕ[n] and Deltaϕ[n] are obtained, and a cross-correlation coefficient rho=sigmatj,tk/( sigma tj. sigmatk) between the xj(t) and xk(t) is calculated.