https://www.cnblogs.com/LastKnight/p/10958021.html

离散时间傅里叶变换（DTFT）的性质及证明 – Seth的博客 – CSDN博客
https://blog.csdn.net/a493823882/article/details/78461614

https://blog.csdn.net/u010592995/article/details/86674123

https://www.zhihu.com/question/27352096

1. http://blog.sina.com.cn/s/blog_aec06aac01013m5g.html  理解SerDes 之一

2. https://www.xilinx.com/publications/events/designcon/2017/112gbps-serial-transmission-over-copperpam4-vs-pam8-slides.pdf   112G SerDes

bandwidth-profiles-for-ethernet-services.pdf,

https://www.cnblogs.com/foonsun/p/5687978.html

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