Patent ID: 8766847
Filing Date: 2014-07-01
Classification: G01S,H04W

Abstract:
1. An apparatus attached to a base station for acquiring information about a base station antenna of the base station, the apparatus comprising: at least two satellite positioning antennas, configured to receive satellite signals sent by a satellite in a satellite positioning system, wherein a baseline formed by a connecting line between two of the at least two satellite positioning antennas and a normal of the base station antenna have an included angle; and a processor, configured to obtain carrier phase information, carrier wavelength information and satellite ephemeris information of the satellite signals by parsing the satellite signals, to obtain two wave paths from the satellite to the two of the at least two satellite positioning antennas according to the carrier phase information and the carrier wavelength information; to obtain a wave path difference between the two wave paths; to obtain coordinates of the satellite in a World Geodetic System (WGS) according to the satellite ephemeris information; to obtain coordinates of the baseline in the WGS according to the two wave paths, the wave path difference and the coordinates of the satellite in the WGS; to convert the coordinates of the baseline in the WGS to coordinates in a local level system (LLS); to obtain a pitch angle of the baseline according to the coordinates of the baseline in the LLS; and to obtain a downtilt of the base station antenna according to the pitch angle of the baseline and the included angle.