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Retransmitting method and equipment used in feature wave-beam shaping transmitting MIMO system

A characteristic beam and beam technology, applied in the field of data retransmission performance, can solve the problem of no diversity gain

Inactive Publication Date: 2007-02-07
PANASONIC CORP
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  • Abstract
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AI Technical Summary

Problems solved by technology

If we still use the original beam w to send when retransmitting the data block, what we get through retransmission is only the gain on the signal-to-noise ratio (SNR), but no diversity gain

Method used

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  • Retransmitting method and equipment used in feature wave-beam shaping transmitting MIMO system
  • Retransmitting method and equipment used in feature wave-beam shaping transmitting MIMO system
  • Retransmitting method and equipment used in feature wave-beam shaping transmitting MIMO system

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Embodiment Construction

[0041] The specific implementation manner of the present invention will be described below in conjunction with the accompanying drawings.

[0042] image 3 Shown is a schematic diagram of a MIMO system adopting the technology of the present invention.

[0043] Among them, the sending end and the receiving end use n respectively T and n R The antenna transmits and receives signals. At the sending end, the data 101 to be sent is respectively processed by the cyclic redundancy check (CRC) encoding device 102 and the channel coding and modulation device 103, and then enters the beamforming process of the beamforming device 104, and then from n T Send out on a transmitting antenna 105. At the receiving end, first by n R Each receiving antenna 106 receives all the spatial signals, and then the channel estimation device 109 performs channel estimation according to the pilot signal in the received signal or by using other methods. Next, the MIMO detection and combining device 10...

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Abstract

The invention relates to a retransmission method used in characteristic wave beam shape sending multi-input multi-output communication system, which comprises: following steps: the receiver, based on the signal channel stat character, forms a character wave beam group with several character wave beams to feedback them to the sender; the sender, based on feedback character wave beam group, selects character wave beam via following methods as sending wave beam that when sending non-retransmission data, using best character wave beam as fixed sending wave beam; when sending retransmission data, in different transmission cycles, selecting the character wave beam different from the best one as the sending wave beam; and the sender, based on selected sending wave beam, forms relative data into wave beam to be sent by the antenna.

Description

technical field [0001] The present invention relates to an automatic retransmission technology in a multi-antenna wireless communication system, in particular to a retransmission method and device used in a multi-input multi-output communication system with characteristic beamforming, which can improve the data transmission rate in a related MIMO system retransmission performance. Background technique [0002] Increasingly high information transmission rate is one of the main problems faced by future wireless communication systems. In order to achieve this goal on limited spectrum resources, multi-antenna technology (MIMO, Multiple Input Multiple Output) has become one of the indispensable means used in future wireless communications. In the MIMO system, the transmitting end uses multiple antennas to transmit signals, and the receiving end uses multiple antennas to receive spatial signals. Studies have shown that compared with traditional single-antenna transmission method...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/16H04L1/08H04L1/06
Inventor 佘小明李继峰
Owner PANASONIC CORP
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