本科生毕业论文（设计）
专业代码：
作者姓名：
学 号：
单 位：
指导教师：
年 月 日
摘要
在数字通信系统中，通常采用差错控制编码来提高系统的可靠性。自P．Elias首次提出卷积码编码以来，这一编码技术至今仍显示出强大的生命力。目前，卷积码已广泛应用在无线通信标准中，如GSM，CDMA2000和IS-95等无线通信标准中。 本文简单介绍了纠错码的基本原理，论述了卷积码编译码原理和算法，并通过matlab仿真对卷积码性能进行研究，重点比较分析了不同码率、不同约束长度、不同回溯长度以及不同译码判决方式对Viterbi译码性能的影响，并得出相关结论。
关键词：卷积码，Viterbi，Matlab，误码率，数字通信系统
卷积编码
Abstract
In digital communication systems, error control coding is usually used to improve system reliability. Since P.Elias put forward the convolutional coding the first time, the coding is sti
ll showing strong vitality.,has become widely used in satellite communications, wireless communications and many other communication systemsas a kind of channel coding method. such as GSM, CDMA2000 and has been a wireless communication standards of IS-95.
This article introduces the basic principles of error-correcting codes, mainly reasearch the principle of the convolutional code encoding and decoding and the algorithms.Through the matlab simulation, we study the performance of convolutional code, especilly the performance of the viterbi decoding with different bit rates, different Constraint length ,different traceback depthe and different decision types,compare and make conclusions.
Keywords: convolutional codes, Viterbi, Matlab, bit error rate, the digital communication system
豫公网安备41160202000603
站长QQ:729038198
关于我们
投诉建议