基于匹配模板的二相编码信号识别方法

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,传统的基于参数提取的雷达信号识别方法将会失效。针对这一问题,提出了基于匹配模板的雷达信号识别方法,阐述了该方法中匹配模板的创建、匹配算法的实现和匹配输出性能参数提取与分析三个关键步骤,以二相编码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方法的可行性。在信号受到噪声污染的情况下,该方法对二相编码信号的识别信噪比可以达到-6 dB。

Recognition Method of Binary Phase-coded Signal Based on Matching Template

After radar adopts the low probability of interception （LPI） technology,especially under the condition of low signal noise ratio （SNR）, the traditional radar signal recognition methods based on parameter abstraction will lose their effect. In allusion to this problem, this paper puts forward the radar signal recognition method based on matching template, expounds three pivotal processes of this method such as the establishment of matching template, the realization of matching algorithm, the abstraction and analysis of matching output performance parameters, taking the binary phase-coded signal as an example to establish the corresponding matching recognition rule, validates the rule＇s validity and the method＇s feasibility through the simulation test. In the condition that the signals are polluted by noises, the SNR that the binary phase-coded signal recognized by the method can reach --6 dB.