• 研究论文 • 上一篇    



  1. (1. 中国电子科技集团公司第38研究所, 安徽 合肥 230031;2. 中国科学技术大学 快电子实验室, 安徽 合肥 230026)
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2007-10-20 发布日期:2007-10-25

Research on evaluating DDJ performance in the serial interconnect channel

TANG Shi-yue1;YANG Jun-feng2

  1. (1. No.38 Research Institute of China Electronic Technology Corporation, Hefei 230031, China;2. University of Science and Technology of China, HeFei 230026, China)
  • Received:1900-01-01 Revised:1900-01-01 Online:2007-10-20 Published:2007-10-25

摘要: 由信道响应函数建立方程,求过判决门限时刻的解得到信道中数据依赖型抖动(DDJ)的数学计算公式.根据递推方法找到DDJ单调递增,或单调递减的码流,从而得到DDJ的极大值和极小值.相对于发送大量随机码流遍历搜索DDJ极值的方法,能直接找到极值时刻对应码流,计算量少.对二阶系统的理论计算和仿真结果表明,只需要计算20位以内的码流就能达到随机码流仿真105次的精度.该方法同样适用于分析数据抖动的其他复杂成分.

关键词: 数据依赖型抖动, 码间干扰, 眼图

Abstract: From the impulse response of a digital serial communication channel, this paper gets the mathematic expression for the data dependence jitter(DDJ) crossing unique threshold. An induction method is found to search for the special codes which makes DDJ unilaterally increase or decrease and calculate the extremum of DDJ. In contrast with the method using a lot of random codes to search for the peak-peak value of DDJ, this method can calculate this value directly with less computation complexity. The analytical result and simulated result are compared according to a second order system and this method need only compute no more than 20 codes to reach the precision of simulating 105 random codes. This method also can be used to analyze the other jitter components.

Key words: data dependence jitter(DDJ), inter-symbol interference (ISI), eye diagram


  • TP274+.2