| 基于LFM-PC复合调制信号的正交波形设计 |
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| 引用本文： | 李晨,张劲东,陶庆,黄佳.基于LFM-PC复合调制信号的正交波形设计[J].信号处理,2021,37(3):366-373. |
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| 作者姓名： | 李晨 张劲东 陶庆 黄佳 |
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| 作者单位： | 南京航空航天大学电子信息工程学院 |
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| 基金项目： | 航空科学基金项目（2017052015，20182007001） |
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| 摘 要： | 相位编码(Phase Coded,PC)信号运用在高速运动平台和高速目标探测中存在多普勒敏感问题,制约了其在宽多普勒容限正交波形中的应用.本文研究了一种基于线性调频(Linear Frequency Modulation,LFM)信号和PC信号复合调制的宽多普勒容限信号形式—LFM-PC信号,推导出了其脉间信号的模糊函...
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| 关 键 词： | 复合调制信号 模糊函数 多普勒容限 波形优化设计 交替方向乘子法 |
| 收稿时间： | 2020-08-06 |
Orthogonal Waveform Design Based on LFM-PC Hybrid Modulation Signal |
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| Institution: | College of Electronic and Information Engineering, Nanjing University of Aeronautics and Astronautics |
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| Abstract: | The use of Phase Coded (PC) signal in high-speed motion platforms and high-speed target detection has Doppler sensitivity problem, which restricts its application in wide Doppler tolerance orthogonal waveform. This paper studies a wide Doppler tolerance signal form based on hybrid modulation of Linear Frequency Modulation (LFM) signal and PC signal—LFM-PC signal, and deduces the discrete expression of the ambiguity function of its interpulse signal. Within the Doppler tolerance, an optimal design model is established by minimizing the sum of the side lobes of the normalized auto ambiguity function and the cross-ambiguity function, and a low-complexity signal optimization method based on the Alternating Direction Method of Multipliers (ADMM) is proposed. The simulation results show that the optimized LFM-PC signal based on ADMM has better waveform diversity gain and waveform isolation within the Doppler tolerance, and the optimized algorithm has the characteristics of fast convergence speed and low computational complexity. |
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