Multi-antenna testing system calibration method and device

Abstract

The invention discloses a multi-antenna testing system calibration method and device. A calibration opening of an RRU (Radio Remote Unit) of a base station which is arranged in a multi-antenna testing system is connected with a radio frequency cable, wherein the radio frequency cable is arranged in the multi-antenna testing system and used for connecting with terminal UE (User Equipment) to be calibrated. The multi-antenna testing system calibration method comprises obtaining the downstream channel parameter change information of a calibration sequence signal after the calibration sequence signal is transferred to the calibration opening from every downstream radio frequency channel and obtaining the upstream channel parameter change information of the calibration sequence signal after the calibration sequence signal is transferred to every upstream radio frequency channel from the calibration opening, wherein the downstream channel parameter change information and the upstream channel parameter change information comprise the phase and the time delay respectively and the calibration sequence signal is a ZC sequence; performing calibration on every downstream radio frequency channel based on the downstream channel parameter change information; performing calibration on every upstream radio frequency channel based on the upstream channel parameter change information. According to the multi-antenna testing system calibration method and device, the calibration steps are simplified, a connection cable does not need to be changed to achieve the calibration on the channels, and the calibration accuracy is improved.

Description

technical field [0001] The embodiments of the present application relate to the technical field of communications, and in particular to a method for calibrating a multi-antenna test system. The embodiment of the present application also relates to a calibration device. Background technique [0002] The multi-antenna test system configuration in the mobile communication laboratory consists of base stations, core networks, and wireless channel emulators (such as figure 1 As shown, taking C8 as an example, C8 is composed of 8-input and 8-output channel simulator), terminals, and connecting devices such as radio frequency cables, attenuators, and circulators. [0003] The instrument used in the prior art is a vector network analyzer, whose function is to measure the amplitude and phase of various parameters of the two-port network, which belongs to the general instrument in the radio frequency field, and has two interfaces Port1 and Port2. [0004] At present, the calibration ...

AI Technical Summary

Problems solved by technology

[0019] However, when performing calibration in the prior art, the following problems are faced: due to the repeated replacement of the connection of the radio frequency cable, the defect of low calibration efficiency due to multiple operations is caused. In addition, the calibration requires manual adjustment and observation while adjusting; and the accuracy of human judgment results is low. ;The cable is disconnected during the calibration process, and then connected back to the system after calibration, this process will cause changes in the degree of connection tightness, and will also increase the system error

Images