摘要
设计了一种基于混沌相位谱调制的MIMO雷达低旁瓣正交波形。首先对信号频谱的相位谱分量进行混沌调制,同时保持其幅度谱分量恒定;然后通过逆傅里叶变换将信号从频谱转换到时域波形。仿真结果表明:所设计的信号具有随机波形,能够提高MIMO雷达的抗干扰能力;非常低的自相关函数旁瓣,可以防止微弱目标被周围强散射目标掩盖;图钉型的模糊函数,有利于高分辨率成像;良好的正交性性能,可有效降低MIMO雷达系统中不同通道间的相互干扰。
A kind of low-sidelobe orthogonal waveform based on chaotic phase spectrum modulation is designed for MIMO radar. Firstly the phase spectrum component of frequency spectrum is modulated by chaotic sequence,meanwhile the amplitude spectrum component constant is kept,and then the frequency spectrum of radar signal is transformed to its waveform by inverse Fourier transformation. It is demonstrated with the simulation that the designed signals have some advateges,just like its random waveform,which can increase the ECCM capability of MIMO radar; its very low sidelobe of auto-correlation function,which can avoid the weak target being covered by surrounding strong targets; its thumbtack ambiguity function,which is good for high resolution imaging; its excellent orhogonality,which can decrease the mutual interference among channels of MIMO radar.
出处
《电子信息对抗技术》
2017年第6期42-47,共6页
Electronic Information Warfare Technology
关键词
MIMO雷达
混沌相位谱调制
低旁瓣
图钉型模糊函数
正交性
:MIMO radar
chaotic phase spectrum modulation
low sidelobe
thumbtack ambigu-ity function
orthogonality