基于AD9650的高速大动态范围数据采集系统设计

摘要

在高杂波环境下工作的雷达系统要求大的瞬时动态范围，才能实现对弱目标信号的录取，迫切需要设计实现高动态范围的高速数据采集系统。研究了ADC芯片选型、时钟设计和前端电路设计对数据采集系统动态范围的影响，基于AD9650设计实现了一个16 b，65 MSPS的高速数据采集系统，用于实现对高杂波环境下雷达回波信号的采集。%Radar systems working in high clutter requires large instantaneous dynamic range to realize the capture of weak targets signals. As a result,a large dynamic range high-speed data acquisition system is desperately needed. The impact of selec-tion of ADC chips,design of the front-end circuit and the clock circuit on the dynamic range of the data acquisition system is studied. And a 16-bit,65MSPS high-speed data acquisition system based on AD9650 is designed for the radar echo signals ac-quisition in high clutter environment.