基于FSK-PSK复合调制的正交波形设计  

Orthogonal Waveform Design Based on FSK-PSK Composite Modulation

作　　者：杜盈 张劲东[1] 蒋宜林 尹明月 DU Ying;ZHANG Jindong;JIANG Yilin;YIN Mingyue(School of Electronic and Information Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 211100,China)

机构地区：[1]南京航空航天大学电子信息工程学院,江苏南京211100

出　　处：《雷达科学与技术》2022年第5期539-548,共10页Radar Science and Technology

基　　金：国家自然科学基金(No.62171220);航空科学基金(No.20172052015,20182007001);上海航天基金(No.SAST2018-077)。

摘　　要：干扰机通过复制和转发部分目标信号产生欺骗干扰,导致雷达跟踪到的是虚假目标而无法锁定真实目标。为对抗欺骗干扰,设计了脉内相位编码(Phase Shift Keying,PSK)、脉间跳频编码(Frequency Shift Keying,FSK)的FSK-PSK正交波形,用0-1离散变量表示跳频和相位进行0-1整数规划,构造增广拉格朗日函数,采用拟牛顿法求解,同时优化跳频和相位。仿真结果表明,FSK-PSK复合调制信号相对于简单的PSK信号具有更好的抗干扰性能,本文设计的FSK-PSK复合调制信号具有良好的正交性,保证各子脉冲的自相关函数具有低副瓣的同时,子脉冲之间的互相关水平也得到抑制。Jammers generate deceptive jamming by partially copying and retransmitting target signals,which leads to the radar tracking false targets and unable to lock the real targets.For combatting deceptive jamming,FSK-PSK orthogonal waveforms with intra-pulse phase shift keying(PSK)encoding and inter-pulse frequency shift keying(FSK)encoding are designed.The 0-1 discrete variables are used to represent the frequency hopping and phase to perform 0-1 integer programming,the augmented Lagrange function is constructed,and the problem is solved by the quasi-Newton method,therefore frequency hopping and phase can be optimized simultaneously.The simulation results show that the FSK-PSK composite modulated signal has better anti-jamming performance compared with the simple PSK signal.The FSK-PSK composite modulated signal designed in this paper has good orthogonality,which ensures that the autocorrelation function of each sub-pulse has low sidelobe,and the cross-correlation level between sub-pulses is also suppressed.

关 键 词：欺骗干扰 FSK-PSK复合调制 正交波形 0-1整数规划 拟牛顿法 

分 类 号：TN911.7[电子电信—通信与信息系统]