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
The aim of this paper is to achieve the radio frequency stealth(RFS) during the course of tracking by controlling the radiation energy and the interval of a radar. Firstly, we build the model of probability of interce...The aim of this paper is to achieve the radio frequency stealth(RFS) during the course of tracking by controlling the radiation energy and the interval of a radar. Firstly, we build the model of probability of interception with the once radiation during the course of tracking. Secondly, we establish the model of the cumulative probability of interception to describe the effect of RFS throughout the tracking process and obtain two solutions that are minimizing the probability of interception and the radiation times to reduce the cumulative probability of interception. Thirdly, we propose a self-adapting radiation energy control method(SARE)to minimize the probability of interception. Fourthly, we propose a self-adapting radiation interval control method(SARI) to minimize radiation times. Fifthly, combining SARE with SARI, we propose a SARE-SARI control method(SAEI) during the course of tracking.Finally, we compare SAEI with two others by simulation, and the results show the effect of RFS of SAEI is better than the other two,but we have to make a trade-off between the ability of RFS and the effect of tracking.展开更多
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
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.
基金supported by the National Natural Science Foundation of China(61472441)
文摘The aim of this paper is to achieve the radio frequency stealth(RFS) during the course of tracking by controlling the radiation energy and the interval of a radar. Firstly, we build the model of probability of interception with the once radiation during the course of tracking. Secondly, we establish the model of the cumulative probability of interception to describe the effect of RFS throughout the tracking process and obtain two solutions that are minimizing the probability of interception and the radiation times to reduce the cumulative probability of interception. Thirdly, we propose a self-adapting radiation energy control method(SARE)to minimize the probability of interception. Fourthly, we propose a self-adapting radiation interval control method(SARI) to minimize radiation times. Fifthly, combining SARE with SARI, we propose a SARE-SARI control method(SAEI) during the course of tracking.Finally, we compare SAEI with two others by simulation, and the results show the effect of RFS of SAEI is better than the other two,but we have to make a trade-off between the ability of RFS and the effect of tracking.
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。
