摘要
现代电子对抗中,信道化接收机作为一种主流的高截获概率的雷达侦察接收机。针对雷达侦察线性调频宽带脉冲信号特点,提出了一种基于分数阶域的奇偶交替融合信道化接收的方法。首先介绍了分数域奇偶信道化的相关原理,利用了分数阶域奇型和偶型滤波器之间的互补关系,提出了工程实现的高效结构,给出了接收机系统的流程图方案,然后分析了宽带线性调频信号经过分数域奇偶信道化后的输出信号样式。最后,通过MATLAB仿真及各参数的性能比较分析,验证了该方法对非平稳信号具有很好的能量聚焦性,避免了信号在滤波器组过渡带时出现的跨信道问题,提高了输出信号的信噪比,为雷达信号的监测分析提供了有效的技术途径。
In modern electronic countermeasures,channelized receiver is a mainstream radar reconnaissance receiver with high probability of interception.This paper focuses on the characteristics of LFM wideband pulse signal in radar reconnaissance,a channel based on fractional order domain is proposed.Firstly,the principle of fractional parity channelization is introduced.The complementary relationship between odd type and even filter in fractional order domain is used.The efficient structure of the project is proposed.The flow chart scheme of receiver system is given.Then the output signal style of wideband LFM signal after fractional parity channelization is analyzed.Finally,through MATLAB simulation and performance comparison of each parameter,it is verified that the method has good energy focusing on non-stationary signals,avoids cross-channel problems of signal in the transition band of filter bank,improves the signal-to-noise ratio of output signal,and provides an effective technical way for the monitoring and analysis of the reda signal.
作者
蔡凡
CAI Fan(School of Electronics and Electronic Engineering, Minnan University of Science and Technology,Quanzhou, Fujian 362700, China)
出处
《闽江学院学报》
2021年第2期59-66,共8页
Journal of Minjiang University
基金
闽南理工学院理工学院科研课题重点项目(20KJX013)
福建省中青年教师教育科研项目(JAT190887)。
关键词
线性调频
分数阶域
奇偶信道化
输出信号
能量聚焦
LFM
fractional order domain
odd-even channelization
output signal
energy focusing
