A Fast GPS Signal Acquisition Method for High Speed Vehicles Using INS Velocity and Multiple Correlators

INS 속도와 다중 상관기를 이용한 고속 항체용 GPS 수신기의 빠른 신호 획득 기법

This paper proposes a fast acquisition method using INS velocity and multiple correlators for high speed vehicles. In order to reduce acquisition time in GPS receiver, the method utilizes inertial velocity information and multiple correlators. Search range of the Doppler frequency is reduced by using INS velocity and the number of cells at one search can be increased by using multiple correlators. By using both multiple correlators and the INS velocity in the acquisition, search space can be greatly reduced. Experimental results show that the method gives faster signal acquisition performance than the conventional method.