指导教师签名： 2011 年 12 月 15 日
系主任（或责任教师）签名： 2011 年 12 月 15 日
目录
摘要 ..................................................................................................................................................3
Abstract ............................................................................................................................................4
1 Matlab 简介.................................................................................................................................5
2 设计项目分析............................................................................................................................6
2.1 数字通信系统模型.......................................................................................................6
2.2 数字基带系统................................................................................................................6
2.3 AWGN 信道....................................................................................................................7
2.4 循环码..............................................................................................................................8
2.5 误码率和信噪比 .........................................................................................................13
3.matlab 建模设计 ......................................................................................................................14
3.1 信源模块 .......................................................................................................................14
3.2 循环码编码...................................................................................................................15
3.3 awgn 信道加噪 .............................................................................................................16
