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Data transmission method and terminal

A data transmission method and terminal technology, applied in the field of communication, can solve problems such as the inability to make full use of multi-antenna space diversity and the like

Active Publication Date: 2009-10-28
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, simply applying HARQ to a MIMO system in a single-antenna application mode, that is, simple retransmission, cannot make full use of the advantages of multi-antenna space diversity, so it has the potential to further improve system performance

Method used

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  • Data transmission method and terminal
  • Data transmission method and terminal
  • Data transmission method and terminal

Examples

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Embodiment Construction

[0025] The gist of the present invention is to propose a data transmission that enhances its catch-up combining HARQ performance for the A matrix when the number of transmitting antennas is 2 in MIMO transmission in 8021.16e, and the A matrix and B matrix when the number of transmitting antennas is 4 method.

[0026] Among them, when the number of transmitting antennas is 2, the transmission A matrix retransmission method is:

[0027]

[0028] Among them, when the number of transmitting antennas is 4, the transmission A matrix retransmission method is:

[0029]

[0030] Among them, when the number of transmitting antennas is 4, the transmitting B matrix retransmission matrix is:

[0031]

[0032] The HARQ combining method used in the data transmission method according to the embodiment of the present invention is as follows:

[0033] STC decoding is performed on the initial transmission packet to obtain S ~ ...

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Abstract

The invention discloses a data transmission method which comprises the following steps: a base station sends a first data matrix S to a terminal; the terminal carries out space-time coding and decoding for the first data matrix to generate a first decoding result *, and sends a first retransmission request to the base station when the first decoding result does not pass check; the base station responds to the first retransmission request and sends a second data matrix S to the terminal; the terminal carries out space-time coding and decoding for the second data matrix to generate a second decoding result * and carries out combined space-time coding and decoding for the first data matrix and the second data matrix to generate a first combined decoding result *1 and a second combined decoding result *1; and the terminal combines the first decoding result, the second decoding result, the first combined decoding result and the second combined decoding result to generate a first synthesized result. With the invention, a higher signal-to-noise gain can be obtained under the condition of a slow fading channel or a quasistatic channel. The invention also discloses the terminal.

Description

technical field [0001] The present invention relates to the field of communication, and more specifically relates to a data transmission method and a terminal. Background technique [0002] Hybrid Automatic Repeat Request (HARQ) technology is a transmission error control mechanism jointly used by Automatic Repeat Request (ARQ) technology and Forward Error Correction (FEC) technology . The HARQ technology can not only utilize redundant coding gain, but also obtain retransmission combining gain. Applying the HARQ technology to a multiple input multiple output (Multi Input Multi Output, MIMO for short) system has greater potential to improve system reliability and transmission throughput. However, simply applying HARQ to a MIMO system in a single-antenna application mode, that is, simple retransmission, cannot make full use of the advantages of multi-antenna space diversity, so it has the potential to further improve system performance. [0003] In the 802.16e standard, the ...

Claims

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Application Information

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IPC IPC(8): H04L1/18H04L1/16H04L1/00
Inventor 王军虎
Owner ZTE CORP
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