摘要
线性调频信号是典型的宽带LPI信号。典型场景下,电子战侦察接收机截获的线性调频信号信噪比非常低,直接影响常规干涉仪对线性调频信号的精确测向。基于分数阶傅里叶变换在时频域对LFM信号的能量聚焦特性,利用分数阶域变换实现对低信噪比LFM信号相位差的精确测量,提出一种干涉仪对低信噪比线性调频信号精确测向的技术方法。
The Linear Frequency Modulation(LFM)signal is a typical LPI signal.Intercepted LFM signal of surveillance receiver has a low SNR which affects the accuracy of interferometer direction finding.With the energy aggregation properties of FRFT to the LFM signal in time-fre-quency domain,an accurate measurement of the phase of low SNR LFM signal is achieved in FR-FT domain.
作者
何杰
HE Jie(Southwest China Research Institute of Electronic Equipment,Chengdu 610036,China)
出处
《电子信息对抗技术》
北大核心
2022年第2期44-48,91,共6页
Electronic Information Warfare Technology
