This dissertation analyses the system of the ideal software radio and the processing ability of digital signal processors, provides the realization of software radio system in recent years, that is, based on the commonly used hardware platform, software programmable and configurable, if digital system, and declares the popular digital technologies in software radio which can be used in this if digital system 本文在分析了理想软件无线电系统和当前数字信号处理器的运算能力后,提出了现阶段可实现的软件无线电系统,即建立在标准化模块化的通用硬件平台上的软件可编程可再配置软件无线电中频数字化系统,并对这个系统上可实现的软件无线电通用数字技术作了介绍。