摘要
雷达采用低截获概率(LPI)技术之后,特别是在低信噪比条件下,传统的雷达信号识别方法将暴露出对弱信号无能为力、识别率低等缺陷。针对这些问题,设计了基于匹配模板的雷达信号快速识别系统,介绍了系统设计的基本思路,提出了敏感参数这一概念,保证了正确识别率。以线性调频信号为例制定了相应的匹配识别准则,通过仿真实验验证了该准则的有效性和该系统的可行性。在信号受到噪声污染的情况下,该系统对线性调频信号的识别信噪比可以达到-6dB。
When a radar adopts low probability of interception(LPI) technology,especially under the condition of low SNR,traditional radar signal recognition method will be emerged some flaws such as unable to recognize faint radar signals,lower recognition rate and so on.In allusion to these problems,the system that recognized radar signals speedly based on matching template is designed,and the basic process of the system is introduced.The concept of sensitive parameter that could guarantee the probability of a correct identification is put forward.The Linear Frequency Modulation(LFM) signals is used as example to establish them corresponding matching recognition rule.Then computer emulation validate the rule's validity and the system's feasibility.In this circumstances that the signals are polluted by noise,the recognition SNR of LFM signals can reach-6dB.
出处
《航天电子对抗》
2010年第6期31-34,共4页
Aerospace Electronic Warfare
基金
安徽省电子制约技术重点实验室基金(200713002005E)
