SNDR with the PCIe Gen6 Standard

Signal to Noise and Distortion Ratio (SNDR) is calculated using the measured P-max, Sigma-e (σ_e), and Sigma-n (σ_n) values in the following equation:

With the PCIe Gen6 standard, SNDR is calculated using both even and odd pulse fit vectors as shown in the following equation:

Where P_E(k) and P_O(k) are (subsampled versions of) the even and odd pulse fit vectors. In other words, the numerator here, divided by 2, is a replacement for P_max², or an "Effective" P_max².

See Also

• Determining Sigma-n According to the PCIe Gen6 Standard