Patent ID: 6339399
Filing Date: 2002-01-15
Classification: H01Q

Abstract:
A method for calibrating an antenna array that transmits communication traffic signals during beamforming in a mobile radio communication system, said antenna array comprising a number of transmitting antenna sections each comprising transmitting components that might distort the phase and the amplitude of signals that are to be transmitted, said method comprising the steps of:a) generating a single calibration signal; b) injecting said calibration signal into each transmitting antenna section, one at a time; c) collecting a resulting calibration signal from each transmitting antenna section after having passed the transmitting components in each transmitting antenna section, one at a time; d) generating correction factors for each transmitting antenna section; and e) adjusting said transmitting antenna sections with said correction factors, wherein said steps are performed during a limited amount of time on a traffic channel in use.