Indoor distributed antenna system and multiple input multiple output method

Abstract

The invention provides an indoor distributed antenna system and a multiple input multiple output method, wherein the system comprises a radio frequency signal processing module and a circularly polarized radiation module, wherein the circularly polarized radiation module comprises a first radiation caliber and a second radiation caliber which are the same, are perpendicular to each other, and are respectively connected with the radiation frequency signal processing module; the radiation frequency signal processing module is used for generating a first radio frequency signal and a second radio frequency signal and sending the first radio frequency signal and the second radio frequency signal to the circularly polarized radiation module; the first radio frequency signal and the second radio frequency signal are equal in both amplitude and frequency and are different from each other in phase by 90 degrees; the first radiation caliber receives the first radio frequency signal and sends a first radiation signal; and the second radiation caliber receives the second radio frequency signal and sends a second radiation signal. The indoor distribution antenna system and the multiple input multiple output method provided by the invention can be used for realizing the uniform spatial coverage area of two paths of radiation signals, and realizing an excellent diversity effect.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of communications, and in particular, to an indoor distributed antenna system and a multiple-input multiple-output method. Background technique [0002] With the development of mobile communication technology, Multiple-Input Multiple-Output (MIMO) technology has been applied in various mobile communication systems to improve system capacity, such as: Long Term Evolution (LTE ) system and Wideband Code Division Multiple Access (WCDMA) system, etc. [0003] Since the proportion of indoor communication services is increasing, it is very necessary to apply MIMO in indoor mobile communication systems. At present, the indoor distributed antenna system using MIMO mainly sends two orthogonal radiation signals after receiving two equal-amplitude and equal-frequency radio frequency signals through the vertically polarized radiation module and the horizontally polarized radiation module in the du...

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Problems solved by technology

[0004] However, due to the limitations of dual-polarized antenna technology and structural technology, the coverage of the two radiation signals sent by the horizontally polarized radiation module and the vertically polarized radiation module is inconsistent, some of which overlap, and some do not overlap, resulting in mobile terminals in the During the movement process, only one radiated signal can be received under the signal coverage of the non-overlapping part, the diversity effect is poor, and the MIMO application effect is not good

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