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A new multicarrier chaotic phase coded stepped-frequency pulse train radar signal and its characteristic analysis

机译：一种新的多载波混沌相位编码步进频率脉冲序列雷达信号及其特性分析

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Waveform design plays an important role in radar system design. Multicarrier phase coded (MCPC) radar signal has a lot of advantages, such as flexible parameters designing and good spectral efficiency. In this study, we introduce chaotic sequences with weak structure characteristic and MCPC into stepped-frequency signal so as to design two different types of multicarrier chaotic phase coded stepped-frequency pulse train signals and discuss the ambiguity function, autocorrelation and low probability of intercept (LPI) performance of the two signals. Simulation results show that the designed signals have a thumbtack ambiguity function and a lower periodic autocorrelation side lobe which reduce the defect of range-Doppler coupling of stepped-frequency signal significantly. Besides that, the designed signals also have excellent LPI performance and the feature of waveform diversity due to their many merits, such as flexible structure, large number of parameters and complex modulation mode.
机译：波形设计在雷达系统设计中起着重要作用。多载波相位编码（MCPC）雷达信号具有许多优点，例如灵活的参数设计和良好的频谱效率。在这项研究中，我们将结构特征较弱的混沌序列和MCPC引入步进频率信号中，以设计两种不同类型的多载波混沌相位编码步进频率脉冲序列信号，并讨论歧义函数，自相关和低截获概率（ LPI）这两个信号的性能。仿真结果表明，所设计的信号具有图钉歧义函数和较低的周期性自相关旁瓣，从而大大降低了步进频率信号的距离-多普勒耦合的缺陷。除此之外，由于设计信号灵活，结构灵活，参数众多，调制方式复杂等优点，具有良好的LPI性能和波形分集的特点。

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