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Multi-antenna system and data transmission method thereof

A data transmission method and a technology of a multi-antenna system, applied in the field of transmission technology of a multi-input multi-output system, can solve problems such as large channel influence and reduced precoding performance, and achieve the effect of solving performance degradation

Active Publication Date: 2008-12-17
HUAWEI TECH CO LTD
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AI Technical Summary

Problems solved by technology

It can be seen that when the system bandwidth is relatively small, CDD has a greater impact on the channel within the feedback bandwidth, which will reduce the performance of precoding

Method used

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  • Multi-antenna system and data transmission method thereof
  • Multi-antenna system and data transmission method thereof
  • Multi-antenna system and data transmission method thereof

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Embodiment Construction

[0055] In order to make the purpose, technical solution and advantages of the present invention clearer, the following will further describe the implementation of the present invention in detail in conjunction with the accompanying drawings.

[0056] The first embodiment of the present invention relates to a data transmission method of a multi-antenna system, the system includes M antennas for transmission, where M≥2. The specific process is as Figure 7 shown.

[0057] In step 710, the p channels of frequency domain data symbols to be sent x 1 ( n ) x 2 ( n ) . . ...

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Abstract

The invention relates to a wireless communication system, which discloses a multi-antenna system and a data transmitting method. In the invention, the plural phase sequence in the MIMO precoding system of CDD is improved, to cause the phase shift in the whole system bandwidth equal to CDD, meanwhile the variable step of the plural phase sequence is set to be equal to the corresponding sub-carrier of the precoding feedback bandwidth, thereby keeping higher precoding performance when the feedback bandwidth is greater relative to the whole frequency band ratio. The virtual cycle time delay can be changed along the time, thereby obtaining the diversity effect on the time. When the channel frequency has small selectivity, the virtual cycle time delay makes the minimum to obtain the dispatching gain.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to the transmission technology of a Multiple Input Multiple Output (Multiple Input Multiple Output, "MIMO" for short) system. Background technique [0002] With the development of wireless mobile communications, two main technologies have been proposed in recent years: multi-carrier Orthogonal Frequency Division Multiplexing (Orthogonal Frequency Division Multiplexing, "OFDM") technology and MIMO technology. Because OFDM technology can well overcome the multipath characteristics of wireless channels and have higher spectral efficiency than single carrier, and MIMO technology can increase the spectral efficiency and reliability of wireless communication systems; The mutual combination of these two technologies becomes the key technology in the mobile communication system. [0003] The two technologies are briefly introduced below. [0004] The block diagram of the tran...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/06H04L1/06H04L27/26
CPCH04B7/0671
Inventor 马蒂尔斯·文斯特姆陈莉娜蒋培刚
Owner HUAWEI TECH CO LTD
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