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基于DSP的无线MODEM的基带部分的实现

The Implementation of Baseband Part of Wireless Modem Based on DSP

【作者】 冯磊

【导师】 樊昌信;

【作者基本信息】 西安电子科技大学 , 通信与信息系统, 2002, 硕士

【摘要】 随着无线局域网应用的扩展,无线MODEM技术也得到了越来越多的发展。本文提出了一种利用TI公司的TMS320C5402芯片作为中央控制器,在Intersile公司的PRISM2无线局域网套片的基础上开发无线MODEM的方案。文中讨论了硬件调试平台的设计和为实现点对点数据通信所需的控制协议。在介绍了IEEE802.11协议的物理层用到的直序扩频技术和补码键控技术后,对系统的时分双工工作机制的建立与维护进行了详细的分析。提出了一种利用数据帧结合TMS320C5402芯片特性进行时钟同步维护的方法。最后,在介绍了差错控制编码的原理后讨论了如何实现卷积码的编解码算法。

【Abstract】 With the more and more use of Wireless LAN, the technique of Wireless MODEM has been developed. In this paper, a scheme of Wireless MODEM based on TMS320C5402 chip and PRISM2 chips is introduced. The design of hardware platform and the protocol of the Point-to-Point system are discussed. The theory of Direct sequence and CCK is described. The mechanism of TDM is established. Then, a method to maintain the synchronization of the TDM is proposed. In this method, data frames and characteristic of TMS320C5402 chip are used. The implementation of the Convolutional Code is also discussed in this paper. Finally, the flow chart of the algorithms of the system is described.

【关键词】 无线MODEM控制协议时分双工卷积码
【Key words】 Wireless MODEMTDMConvolutional CodeProtocol
  • 【分类号】TN915.05
  • 【下载频次】162
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