I. Introduction
In recent, the important developing trends in wireless communications are wide band, multi model, multi function, intelligence and radio and network integration. Open-style architecture is applied in the scheme of designation to realize the bus-based, programmable, intelligent and modularized SDR, which has the characteristics of universal, scalability, maintainability, adaptability and portability. And, the basis of their realization is SDR of multi-rate signal processing system.