Method and device for correcting radio-frequency channel

Abstract

The embodiment of the invention discloses a method for correcting a radio-frequency channel. The method comprises the following steps that: a BBU obtains a channel estimation value of a first radio-frequency channel according to a digital correction signal fed back by an antenna unit, and determines an initial correction compensation coefficient of the first radio-frequency channel according to the channel estimation value; the BBU corrects the initial correction compensation coefficient of the first radio-frequency channel according to the time delay value and the sampling time of the first radio-frequency channel, such that a first correction compensation coefficient is obtained; the BBU performs alignment correction of the first correction compensation coefficient according to the correction compensation coefficient of a reference radio-frequency channel, such that a second correction compensation coefficient is obtained; and a transmitted signal mapped to the antenna unit is corrected according to the second correction compensation coefficient. The embodiment of the invention further discloses a device for correcting the radio-frequency channel. By means of the invention, various radio-frequency channels can be corrected; and the reciprocity of uplink and downlink channels can be ensured.

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 wireless access system (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 array gain or multiple 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 inconsiste...

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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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