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Data retransmission method and device for multi antenna system

A multi-antenna system and data retransmission technology, applied in the direction of using the return channel for error prevention/detection, preventing/detecting errors through diversity reception, etc., can solve data performance loss, poor data transmission quality, and no reliability of data transmission and other issues to achieve the effect of achieving reliability and improving quality

Inactive Publication Date: 2007-08-29
HUAWEI TECH CO LTD
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Problems solved by technology

[0012] However, in the above prior art, due to the interference between the two groups of antennas, the data detected at the receiving end suffers from performance loss, so the data transmission quality of the prior art is poor, and the reliability of data transmission has not been fully realized. sex

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  • Data retransmission method and device for multi antenna system
  • Data retransmission method and device for multi antenna system
  • Data retransmission method and device for multi antenna system

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Embodiment Construction

[0041] In order to make the purpose, technical solution and advantages of the present invention clearer, the following examples are given to further describe the present invention in detail.

[0042] First introduce some linear algebra knowledge involved in the present invention.

[0043] A system of linear equations in linear algebra is represented as:

[0044] Ax=b (1)

[0045] Where A is a matrix, x and b are column vectors respectively, where x is the unknown quantity to be solved. Suppose this equation has a solution. The condition number of matrix A is the ratio of the largest non-zero singular value to the smallest non-zero singular value, namely cond = λ max λ min . The condition number of A The size is a measure of the influence of the error of the elements in A and b on the solution of the equation system, that is, the larger the c...

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Abstract

The data retransmission method of multiple antennae system includes following steps: (1) receiving end checks the received data to determine whether data are received correctly or not; if not, then informing the sending end to retransmit; (2) sending end carries out linear transformation for data needed to retransmit, and carrying out weighting process for the linear transformed data, then sending the weighted data through multiple antennae. The linear transformation reduces condition number of channel so as to raise quality of data transmission. The invention realizes reliability of data transmission in multiple antennae system.

Description

technical field [0001] The invention relates to a wireless communication system, especially a data retransmission method and device for a multi-antenna system. Background technique [0002] With the development of wireless communication, users have put forward higher and higher requirements for the transmission rate and service quality of wireless communication. However, due to the lack of wireless spectrum resources, the further development of wireless communication is limited. ) technology has received great attention because it can increase the spectral efficiency of wireless communication systems and improve the reliability of wireless communication systems, and has been applied to practical communication systems, such as IEEE 802.16e, IEEE 802.20 and other systems, the current 3GPP The wireless communication system based on Orthogonal Frequency Division Multiplexing (OFDM) and MIMO is also being studied, that is, the long-term evolution of the 3G system. [0003] In th...

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Application Information

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IPC IPC(8): H04L1/18H04L1/06
Inventor 刘江华赵慧龙航郑侃王文博
Owner HUAWEI TECH CO LTD
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