扩频电台的网络控制和信道编译码技术研究

【作者】 庄志华；

【导师】 王炅； 黄文良；

【作者基本信息】 南京理工大学 ， 机械电子工程， 2003， 硕士

【摘要】 本文旨在为远程控制提供解决方案，并为可靠通信建立实验系统。主要内容包括远程网络控制、信道编译码和扩频电台系统设计三个方面。1)网络控制是基于嵌入式设备RCM2200，通过对它编程，实现了串口与以太网口之间数据的透明传输，并对登录用户实施用户验证。通过IE或TELNET访问RCM2200，可以更改其IP配置，主动发起和断开网络连接；在VC++6.0环境下开发了基于windows平台的SOCKET程序，实现了计算机与RCM2200的互连，并能通过计算机远程控制RCM2200串口上的串行设备。2)深入研究了卷积码的编译码算法，通过仿真比较了不同编码约束度、信噪比及软硬判决情况下的误码率；编写了卷积编码和维特比译码的实现程序。3)基于MATLAB，对扩频通信技术有关概念进行了仿真分析，并简要讨论了点对点扩频电台的系统设计和接口技术。更多还原

【Abstract】 This paper is to provide a solution for Remote Network Control(RNC) and establish an experimental system for reliable communication. It covers RNC, channel codes and the system design of a spread spectrum radio device. 1) RNC is based on RCM2200 moudule. By programming the RCM2200, user can change RCM2200’s configuration with a great convenience by means of IE or telnet. Actively launching or closing the network connection is realized and authentication is employed to keep out the unauthorized users. A Windows-based VC++6.0 program is written, which enables computer to directly communicate with RCM2200 moudule and control the peripheral device attached to the RCM2200 serial port . 2) Convolutional Codes and Viterbi Algorithm is studied. The BERs(Bit-Error Rate ) resulting from MATLAB simulation (at different constraint length, Eb/No and decision type ) are presented to show the performance of convolutional codes. A program is developed to simulate convolutional encoder and Viterbi decoder. 3) Based on MATLAB, the primary concepts of the spread spectrum are simulated. The system design and interface technology of a spread spectrum radio device is simply discussed.更多还原