MIMO雷达正交混沌调频波形集设计

Design of Orthogonal Waveforms Set for MIMO Radar Based on Chaos Frequency Modulation

正交波形设计是实现MIMO雷达的关键技术之一,目前正交波形设计方法主要多采用统计优化算法,如模拟退火、遗传算法等,此类方法主要缺点是算法耗时长、效率低,且所设计的波形集性能随着波形个数的增加而下降,针对此问题,提出一种基于混沌调频的MIMO雷达正交波形集设计方法,采用混沌调频信号作为MIMO雷达的发射波形,利用混沌序列良好的统计特性,无需寻优处理即可得到性能优越的正交波形集,且理论上可以得到任意数目的波形而不损失波形集性能,因此,该方法在算法效率和波形多样性方面具有优势,计算机仿真实验验证了设计方法的有效性。

The design of orthogonal wavefonn was one of key technology to realize MIMO radar. Presently, some statisti- cal optimization arithmetic, such as SA （Simulated Annealing） and GA （Genetic Algorithms） ,was often used to design or- thogonal waveforms for MIMO radar. The common flaws of before-mentioned methods were low efficiency and the perform- ance of waveform set should descend along with the increase of the waveform number. So a new method based on chaos fre- quency modulation signal was proposed to design orthogonal waveform set for MIMO radar. Because of the well statistic char- acteristic, the good orthogonal waveform set is gotten without using optimization arithmetic. Moreover, the waveform number would not affect the performance of waveform set. So the proposed method has advantage at arithmetic efficiency and wave- form diversity. The simulations indicated the validity of the method.