Patent ID: 7203462
Filing Date: 2007-04-10
Classification: H01Q,H04B,H04W

Abstract:
1. A radio base station apparatus provided with an array antenna having a plurality of antenna elements, for calibrating a phase difference among the array antenna elements, comprising: a probe signal adding unit which divides one probe signal into a plurality of divided probe signals and adds the divided probe signals to each of receive signals received by said plurality of antenna elements; a probe data extracting unit which extracts probe data from said receive signals added with the probe signal; a phase calibration calculation unit which calculates correlation phase calibration values required for calibrating a phase of each receive signal based on the probe data extracted by said probe data extracting unit; and a phase calibration unit for calibrating a phase difference among the array antenna elements by calibrating said phase of the each receive signal based on the correlating phase calibration from said phase values calibration calculation unit.