The hybrid waveform of linear frequency modulation and binary phase shift keying (LFM-BPSK) can take advantages of the LFM and BPSK signals, and reduce the defects of them. However, with the development of interception technology for the LFM-BPSK signal, the application of the signal is limited. In this paper, to improve the anti-interception performance of the hybrid waveform, a new waveform of LFM-BPSK with the varying chirp rate (denoted as VCR-LFM-BPSK) is designed. In this design, based on the working principle of the interception frame for the LFM-BPSK signal, different chirp rates are introduced in different sub-pulses to prevent the signal from being intercepted by the frame. Then, to further improve the anti-interception performance of the VCR-LFM-BPSK signal, the chirp rates are optimized by minimizing the interception capability of the interceptor. Moreover, based on the VCR-LFM-BPSK signal with the optimized chirp rates, the binary phases are designed via a multi-objective Pareto optimization to improve the capabilities of auto-correlation and spectrum. Simulation results demonstrate that the designed VCR-LFM-BPSK signal outperforms the traditional LFM-BPSK signal in countering the advanced interception technologies.

中文翻译：

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VCR-LFM-BPSK信号设计，可应对先进的拦截技术

线性调频和二进制相移键控（LFM-BPSK）的混合波形可以利用LFM和BPSK信号的优势，并减少它们的缺陷。但是，随着LFM-BPSK信号拦截技术的发展，信号的应用受到了限制。为了提高混合波形的抗干扰性能，设计了一种新的线性调频率的LFM-BPSK波形（称为VCR-LFM-BPSK）。在此设计中，基于LFM-BPSK信号的截取帧的工作原理，在不同的子脉冲中引入了不同的线性调频率，以防止信号被帧截取。然后，为了进一步提高VCR-LFM-BPSK信号的抗拦截性能，通过最小化拦截器的拦截能力来优化线性调频率。此外，基于具有优化线性调频率的VCR-LFM-BPSK信号，通过多目标帕累托优化设计二进制相位，以提高自相关和频谱的能力。仿真结果表明，设计的VCR-LFM-BPSK信号在对抗先进拦截技术方面优于传统的LFM-BPSK信号。