Communication device, baseband unit and communication method

Abstract

Embodiments of the present invention provide a communications device, a baseband unit, and a communication method. The device includes: a baseband unit, an intermediate frequency / radio frequency (IF / RF) unit, and dual-columns cross polarization antennas, where the baseband unit is configured to: determine compensation coefficients respectively corresponding to 4 transmit channels; determine a cable compensation phase according to an uplink sounding signal received from a UE; generate 4 channels of baseband signals according to m channels of signals which are in a one-to-one correspondence with m logical ports; and correct the 4 channels of baseband signals according to the compensation coefficients respectively corresponding to the 4 transmit channels and the cable compensation phase, and send the 4 channels of corrected baseband signals to the IF / RF unit; and the IF / RF unit is configured to send the 4 channels of corrected baseband signals to the UE through the 4 transmit channels and the dual-columns cross polarization antennas. In the embodiments of the present invention, a cable compensation phase is determined according to an uplink sounding signal from a UE, and 4 channels of baseband signals are corrected according to compensation coefficients of 4 transmit channels and the cable compensation phase, so that phases of various channels of transmit signals can be controlled accurately.

Description

technical field [0001] The present invention relates to the field of communication, and in particular, to a communication device, a baseband unit and a communication method. Background technique [0002] In a long term evolution (Long Term Evolution, LTE) system, a base station with dual columns of cross-polarized antennas generally includes a baseband unit and an intermediate radio frequency unit. The middle radio frequency unit can be connected to the dual-column cross-polarized antenna through a feeder cable (Cable). The baseband unit can generate a baseband signal, and then send it to the mid-radio frequency unit, and the mid-radio frequency unit can convert the baseband signal into a radio frequency signal, and then send it to a user equipment (User Equipment, UE) through a dual column cross-polarized antenna. However, since there are differences between the transmission channels inside the middle radio frequency unit and the feeder cables connected between the middle ...

AI Technical Summary

Problems solved by technology

[0003] Embodiments of the present invention provide a communication device, a baseband unit, and a communication method to solve the problem that the phase of each transmission signal cannot be accurately controlled

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