Asynchronous Signal Quality Monitoring and Equalizing Module of High-Speed Wired Communication System
Date Issued
2015
Date
2015
Author(s)
Chien, Yu-Ta
Abstract
In high-speed wired digital communication systems, transmission environment may be affected by various factors, so we need adaptive equalizing technique and signal performance monitoring unit to compensate those negative effects and detect the signal quality immediately. Because of the high clock rate of modern wired digital communication system, clock and data recovery circuit (CDR) is needed to monitor the signal performance synchronously, which is usually expensive in multi-channel system. Instead, using an asynchronous clock to monitor the signal quality doesn’t rely on high-speed CDR, and can be applied in different channels to achieve bit-rate transparency. In this thesis, we use asynchronous sampling to build an asynchronous histogram to monitor the signal quality and estimate the important parameters related to signal quality to adaptively adjust a continuous time linear equalizer (CTLE), which can compensate degraded signal in various transmission environments to enhance the receiving signal quality. In addition, we use digital signal processing algorithms to reconstruct eye diagram from adaptively compensated signal, and using machine vision algorithms to automatically extract eye shape information from the reconstructed eye diagram as an index of system performance.
Subjects
High-speed digital communication
optical communication
signal performance monitoring
adaptive equalizer
asynchronous histogram
asynchronous eye diagram
machine vision
Type
thesis
File(s)![Thumbnail Image]()
Loading...
Name
ntu-104-R01943149-1.pdf
Size
23.32 KB
Format
Adobe PDF
Checksum
(MD5):3355996ad914b072cedd0fe57dd717c9