串行传输中数据恢复算法的研究与仿真

摘要

A serial data recover algorithm based on over-sampling is advanced to implement serial communication inside a sensor network measurement system.After analysis of composition of clock data recovery, phase detection and data discrimination are researched, and influences of frequency difference on them and corresponding solution are demonstrated in detail, then theoretcal proof on performance parameters of this serial transfer technology is given.Modeling and algorithm tests using SystemC class through serial interface engine are prompted.Theoretical analysis and tests showed that serial data stream can be recovered within clock disparity of 3％.%为实现传感器网络测试系统内部的串行通信,提出一种基于过采样技术的串行数据恢复算法.在分析时钟数据恢复的基础上,论证收发时钟频差对相位检测与数据判别的影响,给出解决方法,并对该串行互连技术的性能参数进行探讨.以串行接口引擎为对象,采用SystemC类库对数据恢复算法进行建模和模型测试.理论与测试结果表明,时钟频差在3%内该算法可实现对串行数据流的恢复.