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为了有效利用MIMO体制雷达的波形分集能力,需要对雷达发射波形进行正交性设计,从工程实现的角度出发,针对MIMO雷达发射信号的正交性要求,利用序列二次规划方法设计正交相位编码信号波形。通过仿真分析,重点研究了信号数量、码长对波形正交性能的影响以及波形与雷达发射方向图之间的关系,验证了该方法的有效性和优异性,并与经典的遗传算法进行了仿真比较,最后依托波形产生系统完成了波形的工程实现,并且成功应用到了雷达系统中。结果表明,采用该方法能够获得较低的自相关旁瓣峰值和互相关峰值,设计出符合雷达系统要求的正交波形。
In order to effectively utilize the waveform diversity ability of the MIMO system radar, the orthogonality of the radar emission waveform needs to be designed. From the point of view of engineering implementation, in view of the orthogonality requirements of the MIMO radar transmitting signal, the quadratic quadratic programming method is used to design the quadrature phase Coded signal waveforms. The simulation analysis focuses on the influence of signal quantity and code length on the orthogonality of the waveform and the relationship between the waveform and the radar emission pattern. The validity and the superiority of the proposed method are verified. Compared with the classical genetic algorithm Simulation and comparison, the final relying on the waveform generation system to complete the waveform of the project, and successfully applied to the radar system. The results show that this method can obtain the lower peak value of auto-correlation sidelobe and the cross-correlation peak, and design an orthogonal waveform which meets the requirements of radar system.