关于optisystem中的变量解析
Reference bit rate 打勾了证明是考虑bit rate。
Bit Rate 、sequence length 、 Number of samples per bit
这三个参数是用来计算
Time window 、 Sample rate(采样率) 、 Number of samples（采样数目）
Time window = sequence length ➗ bit rate
Number of sample = sequence length ✖ Number of samples per bit
Sample rate = Number of samples ➗ The window