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Tri-Channel IF Simulated Signal Source Based on AD9957
Author(s): YU Chang-jun, GONG Mian
Pages: 301-
304,311
Year: 2009
Issue:
4
Journal: Radar Science and Technology
Keyword: 中频模拟信号源; 直接数字频率合成; PCI总线; 动态链接库;
Abstract: 介绍了一种以AD9957为核心器件的、基于PCI总线、现场可编程门阵列(FPGA)和直接数字频率合成(DDS)技术的雷达中频模拟信号源,该信号源能实时地高精度模拟3个通道的具有复杂运动轨迹的目标及多种杂波,信号持续输出时间达200s.该系统的所有硬件都集中安装在一个工控机中,该系统的软件结合VC和Matlab共同开发,不仅用户界面友好,而且易于实现,还特别便于维护和复杂功能的扩充.仿真结果表明,该系统能够正确模拟目标的运动轨迹.最后给出了实际系统PD模式下回波信号频谱的测试结果.
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