软件无线电的体系结构和关键技术

软件无线电是近年来出现的一种无线通信新体制 ,它将宽带 A/D/A变换靠近天线 ,尽可能早地将模拟信号数字化。采用数字信号处理 (DSP)技术 ,在可编程的通用硬件平台上 ,建立一种灵活的无线电系统。理想的软件无线电是一个多频段、多模式、开放的体系结构 ,其无线通信功能由软件的运行来实现 ,它能够兼容现有的多种通信模式 ,解决多工作方式的互通问题。关键技术有 :天线和宽带射频转换器 ,宽带 A/D/A变换 ,高速 DSP处理器 ,高性能的互连结构以及软件协议等

The Architecture and Key Techniques of Software Radio

Software radio applied in recent years is a new kind of system of wireless communication. It is a great revolution in the modern telecommunication field. It makes broadband A/D/A converter closer to the antenna, and makes the analog to digital conversion as soon as possible. By adopting the digital signal processing technique, a kind of flexible radio system is established on the programmable universal hardware platform. The perfect software radio is a multiband, multimode, and opening system architecture. Its functions are realized by the software running. It can be compatible with many communication modes, solve the intercommunication problems of multimode communications. The key techniques of software radio include antenna and broadband radio frequency, broadband A/D/A converter, high speed DSP, high capability interconnection structure and software protocol. The paper also introduces the development trend and application prospect of software radio.