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MIMO base station system, method and device for correcting time-delay deviation among channels

A technology of time delay deviation and base station system, applied in the field of communication, can solve the problems of segmental test complexity, increase the complexity of time delay deviation correction between channels, etc., and achieve the effect of reducing complexity and realizing delay compensation

Active Publication Date: 2011-09-14
HUAWEI TECH CO LTD
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Problems solved by technology

[0004] The inventors have found that there are at least the following problems in this implementation: it is necessary to separately test the transmission delay, intermediate frequency processing delay and radio frequency processing delay of each channel from the IDU to the ODU. Complexity of Time Delay Offset Correction

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  • MIMO base station system, method and device for correcting time-delay deviation among channels

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Embodiment Construction

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0027] A distributed base station system applying MIMO technology (hereinafter referred to as MIMO base station system) consists of outdoor units, indoor units and antennas. One indoor unit can support multiple outdoor units, and each outdoor unit corresponds to an antenna. In order to correct the delay deviation between channels in the MIMO base station system, the method provided by the embodiment of the present invention is as follows figure 1 As shown, it specifi...

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Abstract

The invention relates to a method for correcting time-delay deviation among channels in an MIMO base station system, comprising the following steps: obtaining reference synchronous time of each outdoor unit relative to other outdoor units according to a synchronous sequence received and transmitted by each outdoor unit; determining the transmission time-delay compensation parameter and reception time-delay compensation parameter of a channels corresponding to each outdoor unit according to the reference synchronous time of each outdoor unit relative to other outdoor units; and correcting the time-delay deviation among channels corresponding to each outdoor unit according to the transmission time-delay compensation parameter and the reception time-delay compensation parameter. The embodiment of the invention also provides an MIMO base station system, and a device for correcting time-delay deviation among channels. The invention can realize time-delay compensation for transmitting all channels, requires no segmenting measurement and reduces the complexity for correcting time-delay deviation among channels according to the transmission time-delay compensation parameter and the reception time-delay compensation parameter obtained by the outdoor unit relative to other outdoor units.

Description

technical field [0001] Embodiments of the present invention relate to the field of communication technologies, and in particular to a MIMO base station system, a method and a device for correcting time delay deviation between channels. Background technique [0002] In a distributed base station system applying MIMO (Multiple-Input Multiple-Output) technology, each antenna corresponds to an intermediate radio frequency link, and the outdoor unit of the distributed base station is responsible for processing the intermediate radio frequency link. The link formed between the indoor unit-outdoor unit-antenna of the distributed base station constitutes a channel, and the indoor unit is used for baseband signal processing, which can be an IDU (Indoor Unit, indoor unit) in microwave communication equipment, or an BBU (Building Base band Unite, indoor baseband processing unit); the outdoor unit is used for transmitting and receiving radio frequency signals, and performs frequency con...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W56/00H04W88/08
Inventor 宁科
Owner HUAWEI TECH CO LTD
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