摘要
针对低截获概率雷达信号的截获与识别,归纳出一类具有线性调频特性的低截获概率雷达信号,包括线性调频信号、多相编码信号(Frank、P1、P2、P3和P4码信号)和对称三角线性调频连续波信号。分析了线性调频信号、多相编码信号和对称三角线性调频连续波信号的分数阶频谱分布特征,选出该类雷达信号调制识别的一组特征向量。设计了一种基于分数阶傅里叶变换的雷达侦察系统,并且,针对该类LPI雷达信号,提出一种基于分数阶傅里叶变换的雷达信号调制识别算法。最后,利用仿真实验方法对该雷达侦察系统进行了仿真验证,结果表明该雷达侦察系统在低信噪比条件下对这类具有线性调频特性的低截获概率雷达信号仍具有较好的截获与识别效果。
For the intercept and recognition of low probability of intercept radar signals, a kind of low probability of intercept radar signals with linear frequency modulated property were summed up, including linear frequency modulated signal, polyphase codes signals（Frank, P1, P2, P3 and P4 codes signals） and symmetrical triangular linear frequency modulated continuous wave signal. First, their time-frequency distribution characteristics and the fractional spectrum characteristics were analyzed, and a group of their characteristic vectors were chosen. Second, a radar reconnaissance system was designed based on fractional Fourier transform, and a method was proposed for the modulation and recognition of the kind of low probability of intercept radar signals. Finally, the radar reconnaissance system was simulated, and simulation results indicate that the radar reconnaissance system can get better intercept and recognition effect on the low Signal-to-Noise（SNR） condition.
出处
《系统仿真学报》
CAS
CSCD
北大核心
2014年第5期1084-1089,共6页
Journal of System Simulation
基金
国家自然科学基金(71073172
61174156
61273189)
关键词
低截获概率
线性调频
分数阶傅里叶变换
侦察系统
仿真
low probability of intercept
linear frequency modulated
fractional Fourier Transform
reconnaissance system
simulation
作者简介
徐会法（1981-），男，博士后，研究方向为电子信息战理论及应用、战争模拟。
