超宽带雷达具有很高的带宽,因此其具有很高的距离分辨率,同时具有很强的抗干扰能力。数字采集系统作为超宽带雷达系统中的关键组成部分,需要很高的采样率才能完成对超宽带信号的采集。本文以高性能FPGA+超高采样率ADC的结构进行高速数字采集系统的设计,实现两通道、8位、9.4 Gsps信号采样,系统的ENOB优于5.4位,SFDR优于50 dB,性能满足设计需求,具有一定的工程应用价值。
Abstract
UWB radar has high range resolution and strong anti-jamming capability because UWB radar has a large bandwidth.As a key component of UWB radar system,digital acquisition system requires a high sampling rate to acquire UWB signals.In the paper,a high-speed digital acquisition system is designed with the structure of high-performance FPGA and ultra-high sampling rate ADC to achieve two-channel 8 bits 9.4 Gsps signal sampling.The ENOB of the system is better than 5.4 bits,and the SFDR is better than 50 dB.The performance meets the design requirements and has good engineering application value.
关键词
高速数字采集 /
FPGA /
ADC12DJ5200RF /
超宽带
Key words
high-speed digital acquisition /
FPGA /
ADC12DJ5200RF /
UWB
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