摘要
集中式MIMO雷达支持不同阵元发射正交或非正交波形,实现波束在空间能量分布设计,从而获得良好的检测和杂波抑制性能。当存在相干干扰时,通常采用最大化最差角度的信杂噪比来设计波形;当目标角度不确定时,该问题呈现非凸属性,导致难以获得最优解。利用非负三角多项式的半正定表示引理,将上述问题转化为半正定凸优化问题求解,并针对算法维数过大容易失效的问题,引入杂波矩阵秩近似方法进行了优化。与已有鲁棒波形设计算法相比,该鲁棒波形在仿真条件下具有更好的检测性能。
As the different array elements can transmit orthogonal or non-orthogonal waveform,which can design the beam energy distribution in space,the co-located MIMO radar can achieve better detection and clutter suppression performance.In the presence of coherent interference,the maximization of the signal to clutter plus noise ratio(SCNR)in the worst angle,is usually applied to design the waveform.However,with uncertain-azimuth targets,the above problem presents a non-convex property,resulting in the failure of solving the optimal solution.In this paper,we apply the semi-positive definite representation lemma of non-negative trigonometric polynomials,which can transform the original problem into a semi-positive definite optimization convex problem.Simulation results show that,compared with the existing robust waveform design algorithms,the proposed robust waveform has better detection performance.
作者
王虹旋
高静
张云雷
WANG Hong-xuan;GAO Jing;ZHANG Yun-lei(Unit 91550 of PLA,DaLian 116000;Unit 96946 of PLA,BeiJing 100000;Naval University of Engineering,Wuhan 430033,China)
出处
《指挥控制与仿真》
2021年第3期69-73,共5页
Command Control & Simulation
