汉明码译码快速性与纠错特点与应用.doc

浙 江 理 工 大 学 信 息 电 子 学 院 毕业论文(设计)诚信声明 我谨在此保证：本人所写的毕业论文(设计)，凡引用他人的研究成果均已在参考文献或注释中列出。论文(设计)主体均由本人独立完成，没有抄袭、剽窃他人已经发表或未发表的研究成果行为。如出现以上违反知识产权的情况，本人愿意承担相应的责任。 声明人(签名)： 年 月 日  摘 要 数字信号在传输过程中，由于受到干扰的影响，码元波形可能会被变坏。接收端收到后可能发生错误判决。由乘性干扰引起的码间串扰，可以采用均衡的办法纠正，而加性干扰的影响可以采用差错控制的措施来解决。应运差错控制的需要，已成为信道传输过程中抗干扰的有效手段，其中较为成熟的编码方法如汉明码、奇偶校验码、循环冗余码等编码技术，被广泛应用于计算机、电子通信、控制等各个领域。 汉明码是线性分组码，它能纠正一个错码和检测两个错码，在原编码的基础上附加一部分代码，使其满足纠错码的条件，由于线性码的编码和译码容易实现，且编码效率较高，所以至今仍是应用最广泛的一类码。 本文提出一种采用汉明码的伴随式译码方法。在介绍原理的基础上，通过对（15 ，11）C语言编写，并使用VC++6.0软件进行仿真验证，使其在虚拟信道中输入一系列码组，实现对错误码字的纠正并显示出该码组在编译码时的伴随式、差错图案、发码和收码、及纠正后的码字等。进而说明汉明码译码的快速性，并进而分析它的纠错特点及其在电子、通信等领域上的应用。并实现了在proteus上绘制编码电路与译码电路，实现硬件仿真。 关键词：汉明码，（15，11）汉明码，编码，伴随式译码，纠错应用 ABSTRACT In the process of the digital signal transmission, due to the impact of interference, the symbol wave will be deteriorated. The receiver may receive an error judgement. If the intersymbol interference is caused by multiplicative, it can be corrected by the balance measures, and the impact of additive crosstalk can use the error control measures to solve. As the demand of the error control and the rapid development of error control coding technology, it became an effective means of anti-jamming in Channel transmission process. There are many encoding methods, such as Hamming code, parity bits, cyclical redundancy coding and so on, which are widelyused in computers, electronic communications, control and other fields. Hamming code is a kind of linear block code, it can correct one wrong code and find two wrong code, as the basis of the original encode, it adds some codes to meet the conditions for error-correcting codes. As the coding and decode of linear code is not difficult to realise, and the efficiency of coding is rather high, so till now it is still one of the most commun code. In the article, I get out one mean of syndrome decoding, it is implementated on the base of C language hamming encoding and decoding. On the basis of the principle, by designing