Data transmission method and device

A data transmission method and data technology, applied in the field of communication, can solve problems such as inability to select an antenna, reduce system performance, etc., and achieve the effect of improving performance

Inactive Publication Date: 2011-05-18
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, in related technologies, when the data transmission mode of the transmitter is adaptively switched according to the scene, the appropriate antenna cannot be selected according to the current data transmission mode, thereby reducing the performance of the system

Method used

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Embodiment 1

[0043] In this embodiment, the sending end selects the antenna for sending data and sends data to the receiving end according to the following steps for each receiving end:

[0044] Step 1, the mode acquisition module 10 selects the multi-antenna data transmission mode as space diversity according to the channel state information;

[0045] Specifically, it may be to calculate the spectral efficiency of each multi-antenna data transmission mode, and select the multi-data transmission mode with the largest spectral efficiency as the current data transmission mode, wherein, in this embodiment, the spectral efficiency of the space diversity is the largest, and the space diversity Mode is the current data sending mode.

[0046] Step 2, the antenna selection module 20 selects M antennas with the largest mutual spacing in space according to the results obtained by the mode acquisition module 10, and the difference in the number of M antennas in each polarization direction is not grea...

Embodiment 2

[0054] In this embodiment, the sending end selects the antenna for sending data and sends data to the receiving end according to the following steps for each receiving end:

[0055] Step 1, the mode acquisition module 10 selects the data transmission mode of the multi-antenna as spatial multiplexing according to the channel state information;

[0056] For example, the mode acquisition module 10 may calculate the spectrum efficiency of each multi-antenna data transmission mode, and select the multi-antenna data transmission mode with the largest spectrum efficiency as the current data transmission mode. Wherein, in this embodiment, the spectral efficiency of spatial multiplexing is the largest, and the spatial multiplexing mode is selected as the current data transmission mode.

[0057] Step 2, the antenna selection module 20 selects the M antennas that are farthest from each other in space according to the results of the mode acquisition module, and the difference in the numbe...

Embodiment 3

[0065] In this embodiment, the sending end selects the antenna for sending data and sends data to the receiving end according to the following steps for each receiving end:

[0066] Step 1, the mode acquisition module 10 selects the current data transmission mode as cyclic delay diversity according to the channel state information;

[0067] For example, the mode acquisition module 10 can calculate the spectral efficiency of each multi-antenna data transmission mode, and select the multi-antenna data transmission mode with the largest spectral efficiency as the current data transmission mode. In this embodiment, the spectral efficiency of cyclic delay diversity Maximum, select the cyclic delay diversity mode as the current data transmission mode;

[0068] Step 2, the antenna selection module 20 selects the M antennas that are farthest from each other in space according to the results of the mode acquisition module, and the difference in the number of the M antennas in each pola...

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Abstract

The invention discloses a data transmission method and device. The data transmission method comprises the following steps: in a decision cycle of a data transmission mode, a transmitting end acquires a current data transmission mode; the transmitting end selects a group of antennae thereof according to the current data transmission mode; the transmitting end transmits data according to the current data transmission mode through the antennae. By the invention, spatial correlation requirement of a multi-antenna data transmission mode can be adapted effectively and the performance of a system can be improved.

Description

technical field [0001] The present invention relates to the communication field, in particular, to a data sending method and device. Background technique [0002] The multi-antenna technology can increase the coverage of the system, improve the stability of the link, and increase the traffic of the system without significantly increasing the cost of the wireless communication system. Data transmission modes of multi-antenna technology include beamforming, cyclic delay diversity, and their combination with space diversity and space multiplexing. [0003] Among them, spatial diversity (Spatial Diversity, SD) can improve the stability of the link, and its sending end such as figure 1 As shown, the transmitting end is equipped with a total of M physical antennas, corresponding to M equivalent channels, and the information source is channel-coded and modulated and then space-diversity coded to form M data streams, which are then transmitted through the corresponding M physical a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/06
CPCH04B7/0689H04B7/0671H04B7/0691
Inventor 肖华华鲁照华朱登魁刘锟
Owner ZTE CORP
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