基于FM信号的无源雷达数据采集系统设计  

Design of the data acquisition system for the passive radar based on FM signal

作　　者：万红[1] 李申堂[1] 王志刚[1] 

机构地区：[1]解放军信息工程大学

出　　处：《系统工程与电子技术》2006年第2期175-176,180,共3页Systems Engineering and Electronics

基　　金：攀登工程项目(BP200406029);河南省骨干教师基金资助课题

摘　　要：基于FM信号的无源雷达目标回波信号信杂比低,频带窄,只有开发大动态范围的接收机才有可能接收到微弱的目标散射信号。在分析接收系统数据采集方案和不同采样速率对数据采集有效位影响的基础上,采用中频过采样技术采集数据,提出选用PCI-9820采集卡的数据采集方案,其动态范围大于75 dB。应用该数据采集方案已成功检测到空中飞行目标。对低信杂比下雷达回波信号检测有一定的参考价值。The target echo of passive radar based on FM signal has the characteristics of low SCR and narrow band. Only the receiver with large dynamic range can receive the weak echo signal. The data acquisition design for the receiver is discussed and the influence of different sampling rates on the significant digit of ADC is analyzed. The IF oversampling technique and PCI-9820 acquisition card are adopted. The dynamic range of the receiver is larger than 75 dB. A flying target is detected with the propoed scheme and it is helpful for detecting a weak radar echo signal.

关 键 词：无源雷达 数据采集 信噪比 

分 类 号：TN957.52[电子电信—信号与信息处理]