BLMS算法在GNSS天线抗干扰中的应用

首先,简要介绍了国内外卫星导航抗干扰研究现状,结合BLMS(Block Least Mean Square)算法在GNSS抗干扰方面的应用,给出了其硬件实现的方框图和信号流程图,并对实现中存在的问题进行了分析;其次给出了一种实验室条件下模拟干扰环境,进行抗干扰算法研究的方法,即用信号发生器模拟干扰源和卫星信号,使其通过由功分器和合路器搭建的模拟阵列信号单元模拟干扰环境;最后,用单频干扰和扫频宽带干扰测试算法的抗干扰性能,并用Matlab编写的基带处理程序对算法的输出进行码相关,测量输出信号信干噪比(SINR)变化,以检验其有效性.数据表明,该算法具有良好的抑制干扰能力,为GNSS抗干扰研究提供了参考.

BLMS Algorithm Application in GNSS Anti-jamming Antenna Array

A brief introduction to current GNSS anti-jamming research situation at home and abroad is given. In combination with the application of BLMS (Block Least Mean Square) in GNSS anti-jamming, the BLMS Algorithm''s block diagram and its signal flow chart are given to show how to realize it in hardware, and some problems are analyzed in its realizing process. An in-lab anti-jamming researching method is introduced, that is, using signal generators to simulate the jamming and the satellite navigation signal, and using power divider and synthesizer to simulate the array. Finally, monochromatic jamming and swept jamming are used to test the Algorithm''s anti-jamming capability, and its validity is checked by a matlab C/A code correlating program. According to the experimental data, the jamming can be mitigated at large scale when it is suppressive. This offers a valuable reference for GNSS anti-jamming research.