干扰条件下MIMO雷达收发联合方向图优化设计

针对干扰条件下MIMO雷达面临的信号截获以及干扰源快速移动等问题，对雷达收发方向图进行优化设计。在发射端利用最小积分旁瓣准则对发射波束矩阵进行优化，将发射信号能量集中到目标空域，降低旁瓣并在干扰方向形成发射零陷；在接收端利用广义对角加载方法优化接收方向图，在提高信号接收稳健性的同时展宽零陷。通过对MIMO雷达收发方向图进行联合优化设计，解决了信号被截获及快速移动的有源干扰等问题，从收发两端共同提高雷达整体性能。通过实验仿真对比分析，验证了所提方法的可行性和有效性。

Joint Transmit and Receive Beampattern Design for MIMO Radar under Jamming

For the problem of signal interception and fast moving jammers in MIMO radar application, this paper designs a new transmit beampattern through optimizing the transmit beamforming matrix based on the minimization of integrated-sidelobe. This new transmit beampattern can not only focus the transmit energy on the desired spatial sector but decrease the level of sidelobe as well as form a nulling at the jammers direction with the prior knowledge. At the receiving, a new robust beamforming method based on non-uniform generalized diagonal loading is proposed, which can strengthen the robustness of receiving beamformer against different errors and broaden the nulling adaptively. Through the optimization of joint transmit and receive beampattern for MIMO radar, the interception of signal and fast moving jamming are addressed, which improve the performance of MIMO radar from both transmitting and receiving. Simulation results and comparisons with existing methods demonstrate the feasibility and effectiveness of the proposed methods.