基于软件无线电平台的中频信号处理系统设计

Design of IF Signal Processing System Based on Software Radio Platform

摘要:

软件无线电是关于使用固定硬件平台,通过加载各种应用软件,实现通信物理层的一部分或全部功能的设计思想的定义,具有选用不同种类的软件可实现不同的功能的特性。根据软件无线电技术的要求,设计了基于“ADC+FPGA+DAC”的处理模式,通过通信接口将结果发送给主机,将模拟信号转化成数字信号供主机进行处理,与传统的信号处理模式相比,该模式具有体积小,功耗低,可配置和可编程的优点,应用前景广泛,同时该模式还具有多种额外功能,如产生中频信号(IF),进行数字下变频,实现同步解调等功能,扩展与上位机通信的主机接口。

Abstract:

Software radio is a definition of the design idea of using a fixed hardware platform to implement some or all of the functions of the communication physical layer by loading various application software, and has the characteristics of selecting different types of software to implement different functions. According to the requirements of software radio technology, this paper designs a processing mode based on "ADC+FPGA+DAC", sends the result to the host through the communication interface, and converts the analog signal into digital signal for processing by the host, which is compared with the traditional signal processing mode. Compared with this model, it has the advantages of small size, low power consumption, configurability and programmable, and has a wide application prospect. At the same time, this mode also has a variety of additional functions, such as generating an intermediate frequency signal (IF), digital down conversion, and synchronous solution. The tuning function expands the host interface that communicates with the host computer.