摘要
针对现代雷达面临的恶劣战场环境,提出了基于GPS反射信号处理的空中目标探测方法。介绍了一种基于分组信号FFT处理的多普勒补偿算法,抑制了目标多普勒频移对GPS信号自相关性能的破坏。对FFT处理后信号进行不同的多普勒模糊度修正,然后对修正结果脉压后取大,消除了多普勒测量模糊,实现了对目标速度的准确测量。仿真表明:在多普勒完全补偿的情况下,该方法可获得40Hz的多普勒测量精度和良好的信号处理增益,扩展了多普勒测量范围和精度,能够实现空中目标探测。
A method for aerial target detection based on GPS reflected signal processing is introduced to accommodate the bad war envi ronment of present Radar. An algorithm for Doppler compensation is presented based on FFT processing with divided GPS reflected signal, which prohibits the destruction to GPS autocorrelation performance caused by Doppler of target. The Doppler ambiguity is corrected and the target speed is measured precisely by choosing the max value of the compressed signal. The simulation results show that the method extends the measurement range and precision with 40Hz Doppler resolution and perfect processing gain, which can realize the aerial target detection.
出处
《舰船电子工程》
2012年第4期48-50,共3页
Ship Electronic Engineering
关键词
GPS
反射信号
目标探测
多普勒补偿
GPS, reflected signal, target detection, Doppler compensation
