光纤通信中8B/10B编码器的设计与实现  

Implementation and Design of 8B/10B Encoder for Fiber Communication

作　　者：秦蒙[1,2] 王辉[2] 秋云海[2] 郭海涛[3] 

机构地区：[1]东北电力大学信息工程学院,吉林吉林132012 [2]中国科学院深圳先进技术研究院神经工程研究中心,广东深圳518055 [3]东北电力大学电气工程学院,吉林吉林132012

出　　处：《电视技术》2014年第1期50-54,共5页Video Engineering

基　　金：深圳市杰出青年资助项目(JC201005270293A)

摘　　要：为了满足光纤通信系统中对线路编码的特殊要求,在深入分析现有8B/10B编码原理的基础上,提出了一种新的将同步块分组法与查找表法相结合的8B/10B编码方案。此方案的优势在于能在同一时钟下同步完成3B/4B编码和5B/6B编码,进而通过Disparity和Running Disparity这两个参数来控制编码后的4 bit数据和6 bit数据,使之结合为10 bit并行数据,最后通过串化器转化为高速的串行数据进行输出。整体设计方案用VHDL硬件语言实现了算法的描述,并在QuartusⅡ软件平台上实现了整个编码器的电路综合和波形仿真,结果表明该方案具有占用资源少、编码速度快、实时性好、可靠性高等优点,并且充分满足光纤通信中对高速数据传输的要求。In order to meet the special requirements of line encoding in optical fiber communication system, a new 8B/10B encoding scheme, based on the existing 8B/10B coding principle, combining synchronization block grouping method with look-up table method is proposed. This encoding scheme has the advantage of completing 3B/4B encoding and 5B/6B encoding synchronously under the same clock, and then controls the encoded 4 bit and 6 bit data united as 10 bit parallel data through the two parameters Disparity and Running Disparity, finally changes the 10 bit parallel data into a high-speed serial data via the serializer. The algorithm of overall design is described with VHDL, and the circuit integrated and waveform simulation of the entire en- coder are realized on the Quartus lI software platform. The results show that this encoding scheme has the advantages of requiring fewer chip resources, high coding speed, excellent real-time ability, and high reliability. It totally meets the requirements of high-speed data transmission in optical fiber com- munication.

关 键 词：光纤通信 8B 10B编码器 不均等性 极性偏差 

分 类 号：TN929.1[电子电信—通信与信息系统]