一种宽频段软件无线电平台的设计与实现

Design and Implementation of a Wide-band Software Defined Radio

针对现代战术通信中背负式或手持电台体积小、功耗小和对不同频段信号兼容性好的应用需求,结合零中频采样和射频直接采样技术,设计了一种可覆盖较宽通信频段的软件无线电平台。通过将模数和数模转换模块与数字信号处理模块集成在一块印制板上,大大减小了该平台的体积。通过平台软件架构的设计,保证不同通信波形体制的实现。最后,通过调频(Frequency Modulation,FM)和正交相移键控(Quadrature Phase Shift Keying,QPSK)波形测试验证了该平台整个频段信号通信性能良好。该平台具有通信频道宽、结构简单、可靠性高等优点,满足小型化、低功耗和对不同频段信号具有高兼容性的使用需求。

In modern tactical communication,manpack or handset radio has the requirements of small size,low power consumption and good compatibility of different frequency band signals.Here,a software defined radio(SDR)platform that can cover a wide frequency band is designed by combining the technology of zero intermediate frequency(IF)sampling and radio frequency(RF)direct sampling.To reduce the platform's size,the analog-digital convertors(ADCs),digital-analog convertors(DACs)and digital signal-processing module are integrated on a single printed circuit board(PCB).Through the software architecture design of the platform,waveforms appropriate for various communication system can be realized.Finally,the good communication performance of the signal in the whole frequency band is validated by the frequency modulation(FM)and quadrature phase shift keying(QPSK)waveform tests to this platform.With the advantages of wide frequency band,simple structure and high reliability,the platform can meet the requirements of miniaturization,low power consumption and high compatibility of signals in different frequency bands.