Not confined to a certain point,such as waveform,this paper systematically studies the low-intercept radio frequency(RF)stealth design of synthetic aperture radar(SAR)from the system level.The study is carried out fro...Not confined to a certain point,such as waveform,this paper systematically studies the low-intercept radio frequency(RF)stealth design of synthetic aperture radar(SAR)from the system level.The study is carried out from two levels.In the first level,the maximum low-intercept range equation of the conventional SAR system is deduced firstly,and then the maximum low-intercept range equation of the multiple-input multiple-output SAR system is deduced.In the second level,the waveform design and imaging method of the low-intercept RF SAR system are given and verified by simulation.Finally,the main technical characteristics of the lowintercept RF stealth SAR system are given to guide the design of low-intercept RF stealth SAR system.展开更多
随着雷达和通信系统对频谱资源需求日益增长,加之现代战争对雷达生存能力提出的严峻挑战,研究了频谱共存下基于正交频分复用-线性调频波形(Orthogonal Frequency Division Multiplexing-Linear Frequency Modulation,OFDM-LFM)的机载组...随着雷达和通信系统对频谱资源需求日益增长,加之现代战争对雷达生存能力提出的严峻挑战,研究了频谱共存下基于正交频分复用-线性调频波形(Orthogonal Frequency Division Multiplexing-Linear Frequency Modulation,OFDM-LFM)的机载组网雷达射频隐身波形优化算法。采用信干噪比(Signal to Interference Plus Noise Ratio,SINR)作为机载组网雷达探测性能表征指标。以满足雷达探测性能以及不干扰通信频谱为约束条件,以最小化机载组网雷达总辐射能量为优化目标,构建频谱共存下机载组网雷达射频隐身波形优化模型。在此基础上,针对上述非线性、凸优化模型,采用序列二次规划(Sequential Quadratic Programming,SQP)算法进行求解。构建基于OFDM-LFM的射频隐身波形多径回波模型,分析所设计射频隐身波形的探测性能和抗多径效应性能。仿真结果表明,所提算法能够有效降低机载组网雷达的总辐射能量,进而提升射频隐身性能;此外,基于OFDM-LFM的射频隐身波形具有良好的探测性能和抗多径效应性能。展开更多
基金supported by the National Key R&D Program of China(2017YFC1405600)the Fundamental Research Funds for the Central Universities(JB180213)
文摘Not confined to a certain point,such as waveform,this paper systematically studies the low-intercept radio frequency(RF)stealth design of synthetic aperture radar(SAR)from the system level.The study is carried out from two levels.In the first level,the maximum low-intercept range equation of the conventional SAR system is deduced firstly,and then the maximum low-intercept range equation of the multiple-input multiple-output SAR system is deduced.In the second level,the waveform design and imaging method of the low-intercept RF SAR system are given and verified by simulation.Finally,the main technical characteristics of the lowintercept RF stealth SAR system are given to guide the design of low-intercept RF stealth SAR system.
文摘随着雷达和通信系统对频谱资源需求日益增长,加之现代战争对雷达生存能力提出的严峻挑战,研究了频谱共存下基于正交频分复用-线性调频波形(Orthogonal Frequency Division Multiplexing-Linear Frequency Modulation,OFDM-LFM)的机载组网雷达射频隐身波形优化算法。采用信干噪比(Signal to Interference Plus Noise Ratio,SINR)作为机载组网雷达探测性能表征指标。以满足雷达探测性能以及不干扰通信频谱为约束条件,以最小化机载组网雷达总辐射能量为优化目标,构建频谱共存下机载组网雷达射频隐身波形优化模型。在此基础上,针对上述非线性、凸优化模型,采用序列二次规划(Sequential Quadratic Programming,SQP)算法进行求解。构建基于OFDM-LFM的射频隐身波形多径回波模型,分析所设计射频隐身波形的探测性能和抗多径效应性能。仿真结果表明,所提算法能够有效降低机载组网雷达的总辐射能量,进而提升射频隐身性能;此外,基于OFDM-LFM的射频隐身波形具有良好的探测性能和抗多径效应性能。
