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Adaptive retransmit method and equipment in multi-antenna communication system

A communication system, multi-antenna technology, applied in multiplex communication, transmission system, digital transmission system and other directions, can solve the problems of incorrect reception, difficulty in application, and excessive feedback overhead of the system

Inactive Publication Date: 2006-09-13
PANASONIC CORP
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Problems solved by technology

(2) The received data contains retransmitted data subflows, that is, the same data subflows have been received before, but failed to receive correctly
However, this method is difficult to apply in many cases, especially when the channel characteristics are relatively poor
This is because during retransmission, the receiver needs to feed back to the sender the position information of the information bits that need to be retransmitted in the original substream. At this time, due to the large number of retransmitted bits, it will bring too much to the system. feedback overhead

Method used

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  • Adaptive retransmit method and equipment in multi-antenna communication system
  • Adaptive retransmit method and equipment in multi-antenna communication system
  • Adaptive retransmit method and equipment in multi-antenna communication system

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Embodiment Construction

[0031] Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

[0032] figure 2 is a schematic diagram showing the structure of a MIMO system according to an embodiment of the present invention.

[0033] exist figure 2 , the sender and the receiver respectively use n T and n R The antenna transmits and receives signals. At the sending end, the data 101 to be sent is first transformed into n by the demultiplexing module 102 T data sub-streams, and each data sub-stream corresponds to a transmitting antenna 105. Each data substream to be sent is sequentially subjected to CRC encoding by the CRC encoding module 103 and channel encoded and modulated by the channel encoding and modulation module 104 before being sent.

[0034] At the receiving end, first by n R Each receiving antenna 106 receives all the spatial signals, and then the channel estimation module 110 performs channel estimation according to the pilot ...

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Abstract

This invention discloses an adaptive re-transmission method in a multi-antenna communication system at the receiving end including: testing if there are error codes needed to be re-transmitted in the received sub-flows, computing the ratio of equivalent signals and the interference noise of the being re-transmitted sub-flows after MIMO test, comparing the ratio with a pre-set threshold value, if the ratio is smaller than the pre-set threshold, then all the sub-flows to be re-transmitted are re-transmitted, if the ratio is greater than the preset threshold value, then the sub-flows necessary to be re-transmitted should be processed by increment redundant re-transmission.

Description

technical field [0001] The present invention relates to an automatic retransmission technology in a multi-antenna wireless communication system, and more particularly, to an adaptive retransmission method and device in a multi-antenna communication system. 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, multiple antenna technology (MIMO) 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 to traditional single-antenna transmission methods, MIMO technology can significantly increase channel capacity, thereby increasing information transmission rates. [0003] figure 1 Shown is a schematic dia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/18H04L1/06H04J99/00
CPCH04L1/1819H04L1/06
Inventor 佘小明李继峰
Owner PANASONIC CORP
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