基于AD9244和PCI9054的虚拟无线电接收子系统

虚拟无线电是软件无线电技术一种新的发展趋势,基本思路是利用计算机取代传统软件无线电系统中的DSP芯片,一般采用直接中频采样技术,将采样结果通过PCI总线送入主机内存,由用户软件做后续的信号处理.本文讨论了欠采样技术在中频信号接收系统中的应用,由此提出了一种虚拟无线电接收子系统实现的硬件设计方案,然后对系统中重要芯片的性能进行了介绍,并对系统的控制过程进行了详细说明,最后简要介绍了一些注意事项.

A Visual Radio Receiving Subsystem Based on AD9244 and PCI9054

Virtual radio is an evolution of the software radio technology.Different from the traditional method,virtual radio uses general computer to replace DSP chip in the software radio system.The technology of direct subsampling is adopted,and the sampling data is then put into the memory of a computer through PCI Bus.The later work of signal process is made by the user software.In this paper,the application of undersampling technology in the signal receiving system is discussed and a sort of digital Intermediate Frequency(IF) receiver based on virsual radio is introduced.The paper also presents the characters of the basic units and the management of this system in detail.Something must be paid attention is presented at last.