基于分段拟合的非线性组合调制雷达信号设计

发布时间：2018-05-06 09:20

本文选题：组合调制 + 驻留相位原理　；参考：《计算机应用》2017年03期

【摘要】：线性调频与伪随机码组合调制的雷达信号可增加信号复杂度,在降低信号被截获概率方面有突出优势,但该组合具有线性调频高旁瓣,且无法克服加窗处理后主瓣宽度增大的缺点。利用驻留相位产生的非线性调频信号能够抑制旁瓣的特点,提出分段拟合的非线性调频与巴克码调制相结合的方法,将其各自的优点加以结合,不仅可以减小距离与速度模糊度,而且可以抑制旁瓣。对该组合信号的显函数模型仿真曲线和模糊函数图进行分析,仿真结果表明,该方法不仅可以降低距离与速度模糊度、降低信号被低截获概率,而且产生了比传统非线性调频更低的旁瓣,说明了该方法用于雷达信号的可行性与优越性。
[Abstract]:The radar signal modulated by the combination of linear frequency modulation and pseudorandom code can increase the complexity of the signal and has a prominent advantage in reducing the probability of interception of the signal, but the combination has a high sidelobe of linear frequency modulation. And it can not overcome the disadvantage of increasing the width of the main lobe after windowing. Based on the characteristics of sidelobe suppression, a piecewise fitting method of nonlinear frequency modulation and Barker code modulation is proposed, and their respective advantages are combined. It can not only reduce the ambiguity of distance and velocity, but also suppress the sidelobe. The simulation curve and fuzzy function diagram of the explicit function model of the combined signal are analyzed. The simulation results show that this method can not only reduce the ambiguity of distance and speed, but also reduce the low probability of signal interception. Moreover, the sidelobe is lower than the traditional nonlinear frequency modulation, which shows the feasibility and superiority of this method in radar signal.
【作者单位】：新型传感器与智能控制教育部重点实验室(太原理工大学);太原理工大学物理与光电工程学院;
【基金】：国家自然科学基金资助项目(61575137,61377089) 山西省自然科学基金资助项目(2013011019-6) 山西省教育厅科技创新项目(2014112) 山西省科学技术发展计划(工业)项目(20140321003-02) 太原市万柏林区科技项目(20140306)~~
【分类号】：TN957.51

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