高速串行系统码间干扰及等效电压噪声  

Inter-symbol interference and equivalent voltage noise of high-speed serial system

作　　者：许雪梅[1] 倪兰[1] 张键洋[1] 刘丽娟[1] 邓联文[1] 曹粲[1] 杜作娟[1] 

机构地区：[1]中南大学物理与电子学院,湖南长沙410083

出　　处：《浙江大学学报（工学版）》2014年第1期118-123,160,共7页Journal of Zhejiang University：Engineering Science

基　　金：国家自然科学基金资助项目(60771028)

摘　　要：为了研究码间干扰(ISI)对高速串行系统的影响以及不同均衡方式消除码间干扰的性能,在分析码间干扰产生机制的基础上,建立基于传输线的等效电路模型,计算码间干扰的概率密度函数,给出码间干扰的等效电压噪声解析式.根据码间干扰概率分布估算等效电压噪声,与基于矩阵分解的估算结果进行对比,验证了等效电压噪声的有效性.建立高速串行通信系统的抖动模型,采用等效电压噪声的抖动衡量方法,对比了采用不同均衡方式消除码间干扰的效果,给出新的均衡性能评价指标,讨论了等效电压噪声指标与传统指标的关系及适用范围.The mechanism of inter-symbol interference （ISI） formation was analyzed in order to analyze the impact of ISI on the high-speed serial systems and performance of different ways of equalization to elimi- nate ISI. An equivalent circuit model without loss was built according to the transmission line theory and calculation of the probability density function for ISI. An analytic formula of ISI was proposed in the form of equivalent voltage noise. The estimate based on the probability distribution was proved validity com- pared with the estimate based on the matrix decomposition. By constructing the jitter model of a high- speed serial communication system, the equivalent voltage noise of the system inter-symbol interference in a certain period of time was calculated for different equalization. The effect of mitigating ISI in different e- qualization manner was compared and a new evaluation indicator for equalization performance was provid- ed. The relationship between the equivalent voltage noise and traditional indicators was discussed, as well as the scope of application.

关 键 词：码间干扰(ISI) 高速串行通信系统 抖动 等效电压噪声 

分 类 号：TN98[电子电信—信息与通信工程]