Method and equipment for reporting antenna calibration information and determining antenna calibration factor

Abstract

The invention discloses a method and equipment for reporting antenna calibration information and determining an antenna calibration factor. The method comprises the steps of: when the antenna calibration information is reported, estimating a downlink equivalent baseband channel from multiple antennae of a base station to user equipment by the user equipment; and after an amplitude response and a delay value, to be reported, are determined according to the equivalent baseband channel, reporting the amplitude response and the delay value to the base station. In the determination of the antenna calibration factor, the base station determines the amplitude response and the delay value according to an uplink signal sent by the user equipment on a time frequency resource appointed by the base station, and the base station calculates the antenna calibration factor according to the amplitude response and the delay value, reported by the user equipment, as well as the amplitude response and the delay value, determined by the uplink signal. The technical scheme provided by the invention has decreased sensitive degree to channel estimation errors and channel Doppler spread.

Description

technical field [0001] The invention relates to wireless communication technology, in particular to a method and equipment for reporting antenna calibration information and determining antenna calibration factors. Background technique [0002] A MIMO (Multiple-Input Multiple-Output, Multiple-Input Multiple-Output) system refers to a system in which multiple antennas are installed at both the transmitting end and the receiving end. The MIMO system adds space domain processing on the basis of traditional time-frequency processing, and can further obtain array processing gain and diversity gain. In a MIMO system, if the transmitter can know the channel information in a certain way, the transmitted signal can be optimized according to the channel characteristics, so as to improve the receiving quality and reduce the complexity requirement of the receiver. Linear precoding / beamforming technology is one of the optimization methods, which is an effective means to combat fading cha...

AI Technical Summary

Problems solved by technology

[0043] The technical problem solved by the present invention is to provide a method for reporting antenna calibration information and user equipment, a method for determining antenna calibration factors and a base station to solve the problem of antenna calibration when the reciprocity of the uplink and downlink channels is not established

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