多种模式收发信机的软件无线电设计研究

Research on SDR design of multi-mode transceiver

软件无线电具有灵活性、标准化、模块化的特点,针对目前无线通信系统所存在的难兼容、难升级、开发周期长等问题,提出了一种新的基于软件无线电(software defined radio,SDR)多模式收发信机结构,采用了能提高运算和存储效率的多速率信号处理和多相滤波技术,同时在多相滤波设计结构中运用精简的FFT蝶形算法以降低系统整体的运算复杂度。仿真结果表明,采用提出的基于软件无线电的系统结构能够一定程度上,特别是在低信噪比条件下,降低误码率性能。

One novel multi-mode transceiver structure based on software defined radio（SDR） has been put forward in this paper. Multi-rate signal processing and polyphase filtering technique are both applied in the design of the transceiver. Sim- plified FFT butterfly algorithm has been adopted in the polyphase filter design as well. The conclusions are drawn that BER performance can be improved to some extent by adopting the system based on SDR proposed in this paper. Especially, it has obvious advantages at low SNR.