A channel calibration method and calibration device

Abstract

The embodiment of the application discloses a channel correction method and device, and aims to avoid the situation that channel correction cannot be performed since cells do not include any correction channel if channels of a radio frequency unit are allocated to different cells in the prior art. The method in the embodiment of the application comprises the following steps: transmitting a first correction sequence to a correction uplink channel of a second cell through a service downlink channel of a first cell; transmitting a second correction sequence received from the correction uplink channel of the second cell to a first BBU (Building Baseband Unit); transmitting a third correction sequence to a service uplink channel of the first cell through a correction downlink channel of the second cell, and turning the third sequence into a fourth sequence by means of time varying through the service downlink channel of the first cell; and transmitting a fourth correction sequence to the first BBU.

Description

technical field [0001] The present application relates to the technical field of communications, and in particular to a channel calibration method and calibration device. Background technique [0002] With the development of communication technology, a distributed base station composed of an indoor baseband unit (building baseband unit, BBU) and a radio remote unit (radio remote unit, RRU) has been widely used, and the distributed base station can allow the radio frequency of the base station It is separated from the baseband module on the physical layer. In a multi-channel RRU, the frequency response inconsistency caused by a series of device phase and gain differences, aging, amplitude / phase characteristic distortion, filter delay, etc. will cause time-varying errors of the channel. In this way, there will be a large difference between the real channel and the ideal channel, which will affect the overall performance of the system. Therefore, it is necessary to implement ...

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present application provides a channel correction method and a correction device, which are used to solve the problem in the prior art that if the channels of the radio frequency unit are allocated to different cells, there will be cells that do not contain correction channels, resulting in the inability to perform channel correction Case

In the embodiment of this application, when a calibration channel is deployed in a radio frequency unit, but there is no calibration channel in the established first cell, the first cell can use the calibration channel of the second cell in the same radio frequency unit for calibration, solving the problem In the prior art, if the channel of the radio frequency unit is allocated to different cells, there will be a situation where the cell does not contain a calibration channel, resulting in the inability to perform channel calibration

Images