基于数字波束形成技术的北斗抗干扰终端研究

Research on Beidou Anti-jamming Terminal Based on Digital BeamForming Technology

随着电子对抗环境日益复杂,卫星导航及通信领域的抗干扰技术已从传统的功率倒置自适应调零技术转为数字波束形成(Digital Beam Forming, DBF)技术。针对功率倒置算法不能提高卫星信号增益的问题,对数字波束形成技术进行了研究;针对空时多线性约束波束形成算法的硬件资源问题,对基于空频抗干扰算法的数字波束形成技术进行了研究。基于目前导航装备中常见的七阵元终端,将数字波束形成算法与功率倒置算法进行了仿真对比,开展了抗单干扰和五干扰仿真分析及满天星暗室实际测试。通过仿真分析及实际测试,同等干扰条件下,采用基于空频抗干扰算法的数字波束形成技术具有更高的输出信干噪比,以及更强的抗干扰能力。相关研究结果可以支撑北斗抗干扰终端的研发。

With the increasingly complex electronic countermeasure environment,the anti-jamming technology in the field of satellite navigation and communication has changed from the traditional power-inversion adaptive nulling adjustment technology to Digital Beam Forming(DBF)technology.To solve the problem that the power-inversion algorithm cannot improve the satellite signal gain,the digital beam forming technology is studied.To solve the hardware resource problem of space-time multilinearly constrained beam forming algorithm,the digital beam forming technology based on space frequency anti-jamming algorithm is studied.Based on the common seven-element terminals in the current navigation equipment,the digital beamforming algorithm and the power-inversion algorithm are simulated and compared,and the simulation analysis of anti-single interference and five interference is carried out,as well as the actual test of the sky-full-of-stars anechoic chamber.Through simulation analysis and actual test,under the same interference conditions,digital beamforming technology based on space frequency anti-jamming algorithm has higher output signal to interference noise ratio and stronger anti-jamming capability.Relevant research results can support the research and the development of Beidou anti-jamming terminal.