雷达接收信号循环平稳特性控制研究

Research on cyclostationary characteristic control of radar receiving signal

摘要:

由于幅度调制信号循环频率是载频处循环频率的两倍,采用传统方法存在时延问题,导致控制能力较差,提出了雷达接收信号循环平稳特性控制技术。根据雷达信号接收原理,构建非线性规划数学模型,即获取总时延。根据总时延设立约束条件,保证每一个相位和饱和度都具有独立属性,方便频率调整。利用遗传算法保证幅度信号循环频率与载频处循环频率大小一致,改善时延问题。由实验结果可知,该方法最大控制强度可达到99%,能够有效控制信号的循环平稳特性。

Abstract:

Because the cycle frequency of amplitude modulation signal is two times the cyclic frequency of carrier frequency, the traditional method has time delay problem, which leads to poor control ability, and puts forward the cyclostationary characteristic control technology of radar receiving signal. According to the principle of radar signal reception, a mathematical model of nonlinear programming is constructed, that is to obtain the total time delay. The constraint conditions are set up according to the total time delay to ensure that each phase and saturation have independent properties, and the frequency adjustment is convenient. The genetic algorithm is used to ensure that the amplitude signal cycle frequency is consistent with the frequency of the carrier frequency, and the delay problem is improved. The experimental results show that the maximum control strength of the method can reach 99%, and it can effectively control the cyclostationary characteristics of the signal.