无线电工程

针对天基MIMO脉冲雷达探测体制的发射波形设计问题，考虑到天基雷达的发射波形等相关参数极易被敌方侦察设备侦收到，提出了一种新的抗干扰天基TDM-MIMO雷达波形设计方法。结合雷达系统的信号处理流程，建立了基于复合模糊函数的波形设计参数化模型，以表征雷达探测性能的发射信号集复合模糊函数和表征抗欺骗干扰的正交性来优化设计雷达波形，在保证了雷达探测性能的前提下，兼顾了抗干扰性能。该优化波形同时具有一定范围的多普勒不敏感的特性。天基TDM-MIMO雷达系统各发射阵元依次发射或跳变发射正交波形，所有接收阵元接收回波信号，回波信号经过信号处理流程之后实现了目标的检测。仿真试验验证了优化波形的有效性和可行性，适用于天基TDM-MIMO雷达探测高速空间目标的实际工程应用。

In space-based TDM-MIMO radar systems, the transmit waveforms or the related parameters of signals are very easy to be intercepted by reconnaissance equipment.A method of anti-jamming space-based TDM-MIMO radar waveform design is proposed to solve the problem.Combined with the signal processing flow of space-based TDM-MIMO radar system, a parametric model of waveform design based on composite ambiguity function is established.To ensure both the detection performance and anti-jamming performance, the composite ambiguity function and the orthogonality of the waveforms are considered as the optimization criteria in the proposed waveform design method.And the waveforms are insensitive to Doppler in a certain velocity range.Each transmitter array element transmits one of the optimization waveform in a certain order in turn, the receiver array elements receive the echo signal, and target detection is realized after the echo signal goes through the signal processing flow.The simulation results show that the proposed method is effective and feasible.It is suitable for the engineering application of space-based TDM-MIMO radar system in high-speed space target detection.