AD9857的改善因子测试系统的设计与实现  

Design and Implement of an Improvement Factor Test System Based on AD9857

作　　者：展文豪[1] 李志强[1] 尹园威[1] 

机构地区：[1]军械工程学院光学与电子工程系,河北石家庄050003

出　　处：《计算机测量与控制》2012年第3期614-616,620,共4页Computer Measurement &Control

基　　金：国防预研基金(513270203)

摘　　要：介绍了一种能够自身产生改善因子测试所需的目标信号和杂波信号的改善因子测试系统;该系统采用高速数字信号处理芯片来模拟产生视频信号,然后由数字上变频器AD9857变频至中频后送入被测接收机进行MTI处理;同时,系统采用虚拟仪器技术设计了控制软面板,从而能够方便快速地对测试信号参数进行控制;最后利用该系统对某型情报雷达的MTI改善因子进行了测量,在雷达工作频率为220MHz,目标速度为20m/s时,测得改善因子约为55dB,非常接近于厂家提供的参考值。An improvement factor test system is described in this article, which could generate the desired target signals and clutter signals by itself. This system uses high--speed digital signal processing chips to generate the video signals, and then the signals are converted to median frequency by AD9857 before the MTI processing. Meanwhile, it also designs the control panel by virtual instrument technology, which makes the control of the parameters of test signals convenient. Finally, an improvement factor test was carried out by the test system. When the operating frequency of the radar was 220MHz and target velocity was 20m/s, the obtained result was about 55dB, which was very close to the reference value provided by the manufacturer.

关 键 词：改善因子 数字上变频 AD9857 虚拟仪器 

分 类 号：TP302[自动化与计算机技术—计算机系统结构]