摘要
天线阵抗干扰是现代卫星导航接收机抗干扰的重要手段。传统的天线阵波束形成类算法能够在抑制干扰的同时提升抗干扰后输出信噪比,但是在信号捕获阶段,由于缺少先验信息的支持,该类算法无法在信号方向形成增益。因此,提出了一种盲多波束形成的天线阵抗干扰算法,通过形成多个波束覆盖天线阵上半球面,可在无先验信息的条件下对卫星信号形成增益,从而提升信号捕获阶段信噪比,使得接收机在干扰环境中具备更强的信号捕获能力。仿真结果表明:与传统的天线阵抗干扰算法相比,提出的算法能够在有效抑制干扰的同时显著提升接收机信号捕获成功率。
Antenna array anti-jamming is an important means of anti-jamming in modern GNSS(Global Navigation Satellite System) receiver. The traditional antenna array beamforming algorithm can increase the signal-to-noise ratio(SNR) while suppressing interference. However, at the acquisition stage, due to the lack of prior information, such algorithms cannot form beam in the GNSS signal direction. An anti-jamming algorithm for antenna array with blind multi-beamforming is proposed. By forming multiple beams to cover the upper hemisphere of the antenna array, GNSS signals can be enhanced without prior information, thus increasing SNR at the acquisition stage and the acquisition performance of receivers in the interference environment. Simulation results show that compared with the traditional antenna array anti-jamming algorithm, the proposed algorithm can effectively suppress the interference at the acquisition stage and significantly improve the receiver signal acquisition success rate at the same time.
作者
唐庆辉
戴鑫志
张辉
TANG Qing-hui;DAI Xin-zhi;ZHANG Hui(32022 Troop,Wuhan 430000,China;Beijing Satellite Navigation Center,Beijing 100081,China)
出处
《导航定位与授时》
2020年第2期132-138,共7页
Navigation Positioning and Timing
基金
国家自然科学基金(41604016)。
关键词
卫星导航
波束形成
天线阵
抗干扰
捕获
Satellite navigation
Beamforming
Antenna array
Anti-jamming
Acquisition
