无人机导航信号的增强及干扰抑制技术

中国矿业大学信息与控制工程学院,江苏徐州 221116

导航制导与控制; 无人机; 多天线导航接收机; 快变干扰; 稳健波束形成

UAV navigation signal enhancement and jamming mitigation
SUN Yanjing, CHEN Gongxiao, ZHANG Liang, and LI Song

School of Information and Control Engineering, China University of Mining and Technology, Xuzhou 221116, Jiangsu Province, P.R.China

navigation guidance and control; unmanned aerial vehicle(UAV); multi-antenna navigation receiver; fast-moving jamming; robust beamforming

DOI: 10.3724/SP.J.1249.2019.05482

备注

自适应波束形成技术的多天线卫星导航接收机易受高动态干扰影响,导致导航信号接收性能下降,无法为无人机提供可靠的位置信息.提出一种基于最小离差准则的稳健波束形成设计方法,最小离差准则波束形成通过联合信号的各阶统计特征实现对导航信号的接收增强,同时结合最小干扰功率准则展宽波束零陷抑制高动态干扰.稳健最小离差波束形成设计方法可通过求解带有二次约束的优化问题实现.为降低运算复杂度,将二次约束替换为线性约束,并开发快速算法将运算复杂度由标准内点法的O(N3)降至O(NM2). 通过计算机仿真,从波束形成器输出波束图、输出信干噪比、算法收敛速度等方面验证了方法的有效性.

Multi-antenna satellite navigation receivers based on adaptive beamforming technology are susceptible to high dynamic interference, which results in the degradation of the reception performance of navigation signals and can not provide reliable location information for UAVs. In this paper, a robust beamforming design method based on minimum deviation criterion is proposed. By combining the statistical characteristics of each order of the signal, the minimum deviation criterion beamforming can enhance the reception of navigation signals, and at the same time, combining the minimum interference power criterion, widen the beam nulling to suppress high dynamic interference. Robust minimum deviation beamforming design method can be realized by solving optimization problems with quadratic constraints. In order to reduce the computational complexity, quadratic constraints are replaced by linear constraints. A fast algorithm is developed to reduce the computational complexity from O(N3)of standard interior point method to O(NM2). The effectiveness of the method is verified in terms of the output beam pattern from beamforming, the output signal-to-interference-noise ratio and the convergence speed of algorithm by computer simulation.

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