一种新的LPI信号的测向方法  

A Novel Direction Finding of LPI Signals

作　　者：刘亚[1] 薛磊[1] 刘小秋[1] 

机构地区：[1]解放军电子工程学院,合肥230037

出　　处：《电子信息对抗技术》2006年第6期7-10,19,共5页Electronic Information Warfare Technology

摘　　要：低截获概率(LPI)信号的测向是现代电子战的一大难题。时域滤波互功率谱密度(TD-FCSD)的相位部分包含了双通道信号的时差信息,利用其线性相位分量可进行测向。首先对TDFCSD测向法进行了分析,并加以改进,提出了一种新的LPI信号的测向方法———平均时域滤波互功率谱密度(ATDFCSD)测向法,然后对影响测向误差的因素进行了分析,最后仿真实验证明了新方法所带来的性能改善。Direction finding of low probability intercept （LPI） signals is the difficult problem in modem EW system. The direction can be estimated by utilizing the time difference of arrival （TDOA） from a two-channel digital receiver which is bided in the phase of the time domain filtered cross spectral density （TDFCSD）. This method is improved and a novel direction finding of LPI signals based on average time domain filtered cross spectral density （ATDFCSD） is proposed. The influence factor of the error is analyzed and simulations prove that the new method has high performance.

关 键 词：测向 低截获概率 ATDFCSD 

分 类 号：TN971.3[电子电信—信号与信息处理] TN911.72[电子电信—信息与通信工程]