Method for measuring reference direction of dual-polarization intelligent antenna business beam

Abstract

The invention provides a method for measuring a reference direction of a dual-polarization intelligent antenna business beam, which comprises the following steps that: N test points with the geographic position of a dual-polarization intelligent antenna array to be measured as the circle center and a certain distance as the radius and uniformly distributed on a circle are selected to test the geographic position information of the circle center and the N test points; a sweeper is respectively and externally connected with a receiving antenna which is the same with one polarization direction of the dual-polarization intelligent antenna, measures at a point to be tested, and the beam amplitude directional patterns of an intelligent antenna system to be measured in different polarization forms are respectively obtained; the obtained two directional patterns are synthesized to obtain a new directional pattern; and a midline between two half-power points of a main beam on the new directional pattern corresponds to the reference direction of the business beam. The method overcomes the defects of the prior art that the reference direction is determined according to the eye measurement and the experience of an engineer, and provides favorable conditions for accurately measuring the position of a mobile terminal and the direction of arrival of the business beam of the mobile terminal in the external field testing of the dual-polarization intelligent antenna.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to a method for judging the reference direction of a service beam by a dual-polarized 4-column 8-channel smart antenna used in a Time Division Synchronous Code Division Multiple Access (TD-SCDMA) system under field test conditions. Background technique [0002] Smart antenna is a key physical layer technology used in TD-SCDMA system. It adopts space division multiple access (SDMA) technology to distinguish signals of the same frequency or same slot and same code channel by using the difference in signal transmission direction. To maximize the use of limited channel resources. The core of the smart antenna is the beamforming algorithm and the digital signal processor. The weight of the antenna array is generated in real time through the adaptive algorithm, and the beamforming network is used to dynamically adjust the service beam so that the main beam is aligned with the useful si...

AI Technical Summary

Problems solved by technology

However, since the smart antenna must be calibrated before it works, the unpredictability of the environment, climate and other factors will cause the amplitude and phase of the array element to change after calibration, and the reference direction of the service beam obtained by visual inspection will be There is a deviation from the reference direction of the actual business beam

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