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Data transmission method for wireless communication system

A data transmission method and a technology of a wireless communication system, applied in diversity/multi-antenna systems, multi-frequency code systems, etc., can solve problems such as reverse MIMO, etc., and increase the probability of correctly demodulating data signals and channel resource overhead Small, great performance

Inactive Publication Date: 2008-01-02
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0034] The existing technology only provides that in the case of forward MIMO (that is, the base station uses multiple antennas to transmit and the terminal uses multiple antennas to receive), the terminal feeds back precoding information to the base station, and specifies which encoding method the base station uses to send downlink data to the terminal, but It does not consider the situation of reverse MIMO (that is, the terminal uses multiple antennas to transmit, and the base station uses multiple antennas to receive), how the base station feeds back precoding information to the terminal, and specifies which encoding method the terminal uses to send uplink data to the base station

Method used

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  • Data transmission method for wireless communication system
  • Data transmission method for wireless communication system
  • Data transmission method for wireless communication system

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Comparison scheme
Effect test

Embodiment 1

[0082] Embodiment 1: The base station feeds back the reverse channel quality information to the user terminal, and the user terminal uses a precoding method corresponding to the reverse channel quality to modulate the uplink data signal to be sent and send it to the base station.

[0083] Referring to FIG. 4, it is a schematic diagram of a MIMO reverse data transmission process in Embodiment 1 of the present invention, and its specific steps include:

[0084] 1. The base station estimates the channel quality of the reverse link with the user terminal.

[0085] The base station estimates the quality of the reverse link channel (such as frequency selective channel) at this time according to the pilot technology or other techniques (such as sending training sequences for channel estimation). The reverse link channel quality can be described by feedback channel matrix parameters or eigenvalues, eigenvectors, and the like.

[0086] 2. The base station sends a reverse resource assi...

Embodiment 2

[0100] Embodiment 2: The base station feeds back the precoding mode information to the user terminal, and the user terminal uses the precoding mode to modulate the uplink data signal to be sent and send it to the base station.

[0101]Referring to FIG. 5 , it is a schematic diagram of a MIMO reverse data transmission process according to Embodiment 2 of the present invention.

[0102] 1. The base station estimates the channel quality of the reverse link with the user terminal.

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Abstract

The invention discloses two data transmission methods of wireless communication system, used in multi-in multi-out system which sends data via a plurality of antennas, wherein the first method comprises that network evaluates the reverse chain channel quality with a terminal, and reversely sends a resource distribution message to the terminal, the terminal confirms the pre-code method relative to the channel quality, and uses the pre-code method to modulate data to be sent to network, the second method comprises that network evaluates the reverse chain channel quality of terminal, appoints a relative pre-code method for terminal, and sends the code method to the terminal, the terminal uses the pre-code method to modulate data to be sent to network. The invention can improve possibility of data demodulation at network, with low signal resource consumption and better property.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to a data transmission method applied in a multiple-input multiple-output wireless communication system in which a terminal sends data through multiple antennas. Background technique [0002] The traditional communication system is a single-input single-output (Single-Input Single-Output, SISO) system, that is, the transmitting end on the network side and the receiving end on the user side use a transmitting antenna and a receiving antenna respectively, and the signal passes through the transmitting end and the receiving end. Antenna transmit and receive. [0003] At present, the Multiple-Input Multiple-Output (MIMO) technology in the field of wireless communication refers to the use of multiple transmitting antennas and receiving antennas at the transmitting end and the receiving end respectively, and the signal is transmitted through multiple antennas at the transmitt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/02H04L27/26
Inventor 高全中汪璇
Owner HUAWEI TECH CO LTD
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