一种中频数字化接收机的设计与实现

为了解决无线电台多种体制并存、协同能力差、硬件结构复杂等问题,提出了一种基于软件无线电理论的中频数字化接收机的设计方案.说明了系统功能,并对其中的高速A/D变换器、数字下变频单元、通用数字信号处理器、输出单元等各主要功能模块进行了详细地设计.向这个通用硬件平台加载相应的软件即可完成特定的通信功能,通过对软件的升级可以对这个系统不断升级,整个系统功能软件化具有高度灵活的可扩展空间.

Design and Implementation of an IF Digital Receiver

In order to solve the problems such as the coexistence of different structures in the radio station,the poor coordination ability and the complicated hardware structure,the paper presents a design plan based on the IF digital receiver of software radio theory and describes the functions of the system.The high rate A/D converter,the programmable down converter,the general-purpose digital signal processor and the output cell are also discussed in detail.A special function will be implanted by downloading the corresponding software into the hardware platform and the system can be constantly upgraded by continually upgrading the software.The whole system function is highly flexible and expandable.