Calibration method and device for a radio frequency channel

Abstract

Disclosed is a radio-frequency channel correction method, comprising: acquiring, by a BBU, a channel estimation value of a first radio-frequency channel according to a digital correction signal fed back by an antenna unit, and determining an initial correction and compensation coefficient of the first radio-frequency channel according to the channel estimation value; correcting, by the BBU, the initial correction and compensation coefficient of the first radio-frequency channel according to a time delay value and a sampling time of the first radio-frequency channel so as to obtain a first correction and compensation coefficient; and performing, by the BBU, alignment correction on the first correction and compensation coefficient according to a correction and compensation coefficient of a reference radio-frequency channel so as to obtain a second correction and compensation coefficient, and calibrating a transmitting signal mapped to the antenna unit according to the second correction and compensation coefficient. Also disclosed is a radio-frequency channel correction device. The present invention has the advantages of being capable of correcting various radio-frequency channels and guaranteeing the reciprocity of an uplink and a downlink channel.

Description

technical field [0001] The present invention relates to the technical field of communications, in particular to a radio frequency channel calibration method and device. Background technique [0002] In the Frequency Division Duplex (FDD) Long Term Evolution (LTE) system, when the angle expansion of the base station side is small, the reciprocity of the uplink and downlink channels is used to improve the weight accuracy and obtain the array gain or multi-user multiplexing gain. In the FDD scenario, the reciprocity of the uplink and downlink radio frequency channels must be guaranteed, that is, the response of each radio frequency channel during signal reception is consistent, and the response of each radio frequency channel during signal transmission is consistent. When the response of each radio frequency channel in signal reception is inconsistent or the response of each radio frequency channel in signal transmission is inconsistent, it is necessary to correct the receivin...

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Problems solved by technology

[0003] In the prior art, there is no correction scheme for RF channels in the FDD scenario. In the FDD scenario, if the responses of the RF channels during signal reception are inconsistent, or the responses of the RF channels during signal transmission are inconsistent, the reciprocity of the uplink and downlink channels cannot be guaranteed. sex

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