针对雷达射频隐身波形设计中的复杂调制问题,本文提出脉间复合调频与脉内多相码调相的复合策略。在脉间采用非线性的调频特征调制Costas信号各恒定频率,并在脉内采用多相位编码方式调制信号的相位特征,进而得到IPNC-PC信号。采用脉间复...针对雷达射频隐身波形设计中的复杂调制问题,本文提出脉间复合调频与脉内多相码调相的复合策略。在脉间采用非线性的调频特征调制Costas信号各恒定频率,并在脉内采用多相位编码方式调制信号的相位特征,进而得到IPNC-PC信号。采用脉间复合调频增加了信号的时频复杂度,脉内多相码调相增加了信号的相位随机性。仿真结果表明:IPNC-PC信号具备近似“图钉型”的模糊图,自相关旁瓣电平达到-41dB、主瓣宽度变窄率最高达到39%、功率谱峰值低于-10 d B。IPNC-PC信号具有低截获性,射频隐身性能良好,在现代电子战中有良好的应用前景。展开更多
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
文摘针对雷达射频隐身波形设计中的复杂调制问题,本文提出脉间复合调频与脉内多相码调相的复合策略。在脉间采用非线性的调频特征调制Costas信号各恒定频率,并在脉内采用多相位编码方式调制信号的相位特征,进而得到IPNC-PC信号。采用脉间复合调频增加了信号的时频复杂度,脉内多相码调相增加了信号的相位随机性。仿真结果表明:IPNC-PC信号具备近似“图钉型”的模糊图,自相关旁瓣电平达到-41dB、主瓣宽度变窄率最高达到39%、功率谱峰值低于-10 d B。IPNC-PC信号具有低截获性,射频隐身性能良好,在现代电子战中有良好的应用前景。
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.
