摘要
具有高主副瓣比的雷达信号可以降低无源探测系统的截获概率,从而具有一定的射频隐身特性。利用窗函数反求法设计了非线性调频信号,并利用组合窗法优化非线性调频信号,分析信号的自相关主副瓣比和主瓣宽度。由于多输入多输出雷达具备较好的射频隐身能力,基于单一窗和组合窗设计了正交频分非线性调频信号,给出了不同类型、不同组合系数时信号的自相关主副瓣比、主瓣宽度及互相关峰值电平。研究表明,正交频分非线性调频信号具备较强的射频隐身能力,有较广泛的应用前景。
To reduce the intercepted probability of radar signals by passive detection system of the enemy, it is important to research radar signals with good radio frequency （RF） Stealth performance. The nonlinear frequency modulation （NLFM） signal is designed based on the windows reverse seeking method and optimized by combination widows. The ratio of mainlobe peak to sidelobe peak （RMS） and mainlobe width are discussed of different windows. Because of the good RF stealth performance of multiple input multiple output （MIMO） ra dar, orthogonal frequency division NLFM （OFD-NLFM） signals are designed based on a simple window and combination windows. The correlation RMS, mainlobe width and cross correlation peak level of different combi- nation coefficients are given. Research shows that in the circumstance of orthogonality of every signal, the OFDNLFM signal has higher RMS and has good RF stealth performance in modern battlefield.
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2017年第10期2209-2214,共6页
Systems Engineering and Electronics
基金
装备预研基金资助课题
关键词
射频隐身
非线性调频
组合窗
正交频分非线性调频
主副瓣比
radio frequency （RF） stealth
nonlinear frequency modulation （NLFM）
combination window
orthogonal frequency division nonlinear frequency modulation （OFD-NLFM）
ratio of mainlobe peak to sidelobe peak （RMS）
