一种基于阵列天线的伪卫星远近效应抑制技术

摘要

This paper proposes a new near-far effect mitigation method based on array signal to resolve the near-far problem in pseudolites. It can adjust the power intensity of the pseudolite by constraining the beam direction to make it accord with the real navigational signal. Meanwhile, this method achieves maximum interference signal filtering, thus the navigation receiver can work properly under the concurrence of pseudolites, strong interferences and navigation signals. The effectiveness of the proposed method is proved through simulations and performance analysis.%针对伪卫星远近效应问题，提出了一种基于阵列信号处理技术的伪卫星远近效应抑制方法，利用波束形成技术，通过优化伪卫星的波束方向，对伪卫星信号进行抑制，使其功率强度与导航信号保持一致。该方法在抑制伪卫星远近效应的同时，实现最大限度的滤除干扰信号，使得导航接收机即使在伪卫星信号、强干扰信号和导航信号同时存在的环境下，依然能够正常工作。实际的计算机仿真和分析，表明了该方法的有效性。