Interference monitoring and suppression method and system for GNSS (Global Navigation Satellite System) signal, receiver and medium

Abstract

The invention provides a GNSS signal interference monitoring and suppression method and system, a receiver and a medium, and particularly relates to the technical field of satellite navigation communication, and the scheme comprises the steps: obtaining an intermediate frequency signal based on a received GNSS signal; based on the differential cumulative power spectrum of the intermediate frequency signal, performing interference detection on the intermediate frequency signal, identifying the type of the interference signal according to the characteristic parameter of the interference signal, setting the notch frequency, and performing filtering processing on the intermediate frequency signal to obtain a target signal and a filtered signal; and evaluating the filtered signal according to the energy of the signal, and when the filtered signal is evaluated to be invalid, identifying the characteristic parameters of the interference signal again, and adjusting the notch frequency to perform filtering processing until the evaluation is valid. According to the scheme, the interference signals in the environment can be dynamically detected and identified, and the notch frequency can be adjusted, so that the interference signals are effectively detected and adaptively suppressed, and the anti-interference performance of the single-antenna GNSS receiver to various interference environments is improved. 本发明提供的GNSS信号的干扰监测与抑制方法、系统、接收机和介质，具体涉及卫星导航通信技术领域，方案包括：基于接收到的GNSS信号，获得中频信号；基于中频信号的差分累积功率谱，对中频信号进行干扰检测，并根据干扰信号的特征参数辨识干扰信号的类型以及设置陷波频率，对中频信号进行滤波处理，获得目标信号和滤除信号；根据信号的能量对滤除信号进行评估，并在评估滤除信号无效时，重新进行干扰信号的特征参数的辨识，调整陷波频率进行滤波处理，直至评估有效。本方案能够对环境中的干扰信号进行动态检测、辨识以及对陷波频率的调整，以保障干扰信号被有效检测和自适应抑制，从而提高单天线GNSS接收机对各种干扰环境的抗干扰性能。