基于AD9957的多波形雷达信号产生器

Multi-waveform Radar Signal Generator Based on AD9957

介绍一种以数字正交上变频芯片AD9957为核心器件,通过现场可编程门阵列(FPGA)对其进行配置的多波形雷达信号产生器。该信号产生器通过计算机RS 232串口对AD9957的工作参数进行设置,从而实时产生不同时宽和带宽的线性调频、非线性调频信号和相位编码等信号。该系统的软件由Matlab和QuartusⅡ共同开发,不仅用户界面友好,而且便于维护和复杂功能的扩充,具有较强的可移植性。实验结果表明,该系统完全达到了设计要求,性能优良。

A multi-waveform radar signal generator is introduced, which uses AD9957 as the core device and is based on RS 232 serial port, FPGA and DDS technology. The generator can generate different bandwidth signals such as linear frequency modulation signal （LFM）, nonlinear frequency modulation signal（NLFM）, and phase encoding signal in real-time. The system software is developed on the platform of Matlab and Quartus Ⅱ. The user interface is friendly, the system is facile to maintain and expand the complex function. The experimental results show that the system can meet the design requirements.