节点文献

多体制接收机解调电路设计

【作者】 卢菊

【导师】 许建中;

【作者基本信息】 南京理工大学 , 信号与信息处理, 2004, 硕士

【摘要】 传统无线电接收机硬件依赖性强、信号适应能力差,软件无线电技术的出现导致了接收机技术的革新。其基本思想是在同一硬件平台上,安装不同的软件,灵活的实现各种通信功能。鉴于目前器件水平的限制,采用宽带中频数字化技术,使用专用芯片构成灵活的多功能多制式接收机。 本文主要讨论了多体制接收机解调电路的实现方法。从阐述软件无线电理论的基础入手,对多速率数字信号处理技术、高速数据采集以及数字信号的正交分解和解调技术进行了分析,基于它的多功能、开放性的特点,着重讨论了多体制接收机中AM、FM、DOPSK信号的数字解调算法,叙述了实现时应注意的问题。最后用硬件电路验证了所提出的方案并展望了多体制接收机的发展前景。

【Abstract】 Conventional receiver depends on hardware much more. The emergence of software radio results in receiver’s renovation. By means of the software radios, any communication function will be performed in the same hardware platform. Due to the limitation of device level, it is impossible to sample RF signal, using special chip to built in the flexible multi-mode and multi-function receivers.This paper first expatiates on the theory of the software radio, discussing the multi-rate digital signal processing, high-speed data acquisitions, digital product detector and digital signal demodulation. We place emphasis on demodulating algorithms of AM, FM, DQPSK in a multi-function receiver. Finally, the circuits are realized with hardware, in order to prove the discussed schemes.

  • 【分类号】TN851
  • 【下载频次】290
节点文献中: 

本文链接的文献网络图示:

本文的引文网络