Abstract:
본 발명은 위성 항법 기만 신호 처리 기술에 관한 것으로서, 더 상세하게는 위성항법 수신기를 기만하는 인위적인 교란신호를 다중 기준국 기반에서 검출하고 최종적으로 기만신호원의 위치를 추정하여 이를 제거하는데 사용할 수 있는 방법 및 장치에 대한 것이다. 본 발명에 따르면, 위성항법 수신기의 항법해 추정 단계에서 기만신호를 검출하게 되면 기만 시나리오에 상관없이 기만신호의 검출이 용이하다.
Abstract:
The present invention relates to an interference signal detection apparatus and an interference signal detection method of a global navigation satellite system. The interference signal detection apparatus of a global navigation satellite system comprises following components. An adaptive filter unit uses a notch filter to remove a frequency component of an interference signal except for a global positioning system (GPS) signal from the received signal and uses a recursive least square algorithm to search for a frequency of the interference signal. A detecting unit detects whether the interference signal exists in a signal received at the adaptive filter unit by using detection parameters which are derived during the process of the recursive least square algorithm applied to the adaptive filter unit. And a signal selecting unit uses an output signal which passed through the adaptive filter unit, when the interference signal is detected in the received signal, to obtain a GPS navigation solution of the global navigation satellite system, and uses an output signal which did not pass through the adaptive filter unit, when the interference signal is not detected in the received signal, to obtain the GPS navigation solution of the global navigation satellite system. Therefore, according to the present invention, degradation of detection performance of the interference signal is minimized, even when the interference signal is weak or characteristics of the interference signal change quickly.