Abstract: Disclosed is a method for acquiring a signal of a satellite by a receiver, including pre-storing weighting factors of satellites, which include possibility indexes of satellite signal acquisition with respect to positions and times of the receiver, receiving a request for acquisition of the satellite and initializing operational status information and search history information of the satellites, searching for the satellites in sequence according to the weighting factors, resetting the operational status information and search history information of the satellites based on whether signals of the satellites are detected, updating the weighting factor of a satellite having a signal that has been detected, and selecting the satellite having the signal that has been detected in consideration of the updated weighting factor, and acquiring the signal from the selected satellite.

Abstract: A mobile terminal having a hybrid navigation system and a method for determining a location thereof. A satellite navigation system receiver receives satellite data from a satellite. An inertial navigation system measuring device measures inertial data of the mobile terminal. A computing device receives the satellite data from the satellite navigation system receiver and the inertial data from the inertial navigation system measuring device, estimates a location of the mobile terminal using the inertial data, computes a state vector having location information obtained by correcting the estimated location using the satellite data and a state vector correlation error matrix having error information of the state vector, and determines the location of the mobile terminal using the state vector. The computing device uses a state vector correlation error matrix computed in a previous step when computing a state vector correlation error matrix in a current step.

Abstract: Disclosed is a method for acquiring a signal of a satellite by a receiver, including pre-storing weighting factors of satellites, which include possibility indexes of satellite signal acquisition with respect to positions and times of the receiver, receiving a request for acquisition of the satellite and initializing operational status information and search history information of the satellites, searching for the satellites in sequence according to the weighting factors, resetting the operational status information and search history information of the satellites based on whether signals of the satellites are detected, updating the weighting factor of a satellite having a signal that has been detected, and selecting the satellite having the signal that has been detected in consideration of the updated weighting factor, and acquiring the signal from the selected satellite.