光纤通信系统5b6b码译码的设计与仿真 毕业论文.docVIP

光纤通信系统5B6B码译码的设计与仿真 中文摘要 在电力系统通信中，数字光纤通信由于其本身的优点得到越来越广泛的应用。在数字光纤通信系统中，从电端机传输过来的电信号均要结合数字光纤通信传输的特点经过线路码型的转换。通过线路码型的转变平衡数字码流中的“0”和“1”码字，从而避免码流中出现长“0”或者长“1”的现象。在数字光纤通信系统中比较常用的线路码型就是mBnB码型，mBnB线路码型的最大优点是最大相同码元连码数少、定时信息丰富、且有简单成熟的误码监测与码组同步的方法。 5B6B码编码是将自己编写的数据按照一定的规律，编成6B码流后输出；而译码则是将传输到接收机的6B码流，翻译成5B码流后输出。5B6B码译码的过程是编码的逆过程，本文主要涉及到的是译码的过程，译码部分由序列产生模块、缓冲模块以及译码模块构成。这篇论文重要介绍了光纤通信系统的优缺点，组成以及发展趋势；常见的线路码型；Quartus2软件的介绍；5B6B码的译码原理和设计，最后对程序以及电路译码的仿真，最终得到正确的结果。 关键词：5B6B码译码；FPGA；VHDL 语言；Quartus2 软件；波形仿真 5B6B Code Decoding of Optical Fiber Communication System Design and Simulation ABSTRACT In power system communication, digital optical fiber communication because of its advantages to get itself more and more widely used. In the digital optical fiber communication system, from the electric machine transmission to come over to the electrical signals to combine the characteristics of the digital optical fiber communication transmission via the line type conversion. Through balance the digital stream line type 0 and 1 in the code word, thus avoiding stream in 0 or 1 long. Are frequently used in the digital optical fiber communication system in the line type is mBnB type, the biggest advantage of this type is the same biggest mBnB line element even less yards, timing, abundant information, simple and mature method of error monitoring and synchronization code group. 5B6B code coding is to write your own data, according to certain rules into after 6B stream output; The decoding is 6B stream will be transmitted to the receiver, after translated into 5B stream output. 5B6B code decoding is the process of the inverse process of coding, this paper mainly involves is the process of decoding, decoding part produced by sequence module and buffer module and decoding module. This paper the advantages and disadvantages of important optical fiber communication system are introduced, the composition and development trend; Common line type; The introduction