发布时间：2015-01-24 来源：人大经济论坛

通信工程专业论文 以下为一级目录,详细目录及内容请与本站联系 目 录 引言 ……………………………………………………………………………1 1 数字通信概述………………………………………………………………2 ２　系统总体电路设计 ………………………………………………………4 3 FPGA设计方法及相关概念 ………………………………………………15 4 系统软件的总体设计 ……………………………………………………21 5 系统各模块的详细设计 …………………………………………………22 ６ 结论………………………………………………………………………27 谢辞……………………………………………………………………………27 参考文献………………………………………………………………………28 附录……………………………………………………………………………29 摘 要 多路语音呼叫系统的设计利用了数字通信的知识，包括了时分复用和AMI编译码等等。其实现方法就是主机利用FPGA控制PCM编译码芯片TP3067进行采样语音数据，并把4路64Kbps复用成256Kbps的数据流后编码成为AMI码进行传输，而端机用FPGA对接收到的信号进行译码、分接恢复成语音信号输出。 本文首先介绍了数字通信的基本概况，接着详细介绍了系统硬件的设计过程。同时，又介绍了FPGA的设计流程及方法，并详细介绍用这种设计方法进行设计复接器、分接器、AMI编译码器、PCM编译码芯片控制器等模块。并且遵循了标准的设计流程，在MaxplusII上完成了全部功能的仿真测试。 关键词： 时分复用；复接；分接；FPGA；AMI编译码；PCM Abstract The design of multiplex speech calling system is using the knowledge of digital communications that include time divide multiplex and AMI encoding and decoding etc.Host using the FPGA to control the chip TP3067 of PCM encoding and decoding to sampling the speech,then it accomplished that four branches of 64Kbps into one data flow of 256Kbps and accomplished that AMI encoding.The slave receive the code and using FPGA to decoding and demultiplex the data flow,then comeback the data flow to speech and put it to input. At first,this paper introduce the general situation of digital communications.Then show the design process of the system hardware minutely.and show the method and design flow of FPGA ,then introduce using this method to design multiplexer,demultiplexer,AMI encoder and decoder,controller of PCM encoding and decoding chip module etc. lastly,follow the standard design flow carry on gate circuit grade of overall test． Key words : time divide multiplex;multiplex;demultiplex;FPGA;AMI encoding and decoding;PCM