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Method for improving transport efficiency of multi-carrier communication system and multi-carrier communication system

A multi-carrier communication and sub-carrier technology, applied in the field of communication

Active Publication Date: 2011-05-11
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] It can be seen from the existing technology that it selects the interleaving mode according to the number of times data is retransmitted, and does not consider the influence of channel information on interleaving

Method used

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  • Method for improving transport efficiency of multi-carrier communication system and multi-carrier communication system
  • Method for improving transport efficiency of multi-carrier communication system and multi-carrier communication system
  • Method for improving transport efficiency of multi-carrier communication system and multi-carrier communication system

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Embodiment Construction

[0035] The channel is assumed to be slowly fading and may have occasional bursts of interference. The receiver can obtain channel information. The present invention considers using the receiver to select a modulation symbol suitable for this retransmission according to the obtained channel information that affects the bit error performance of the multi-carrier communication system, and / or the interleaving mode used for at least one transmission of the current data before this transmission The interleaving mode is selected, and the selected interleaving mode is fed back to the transmitter; the transmitter uses the interleaving mode selected by the receiver to perform interleaving processing on the modulation symbols retransmitted this time.

[0036] The first embodiment provided by the present invention is a method for improving the transmission efficiency of a multi-carrier communication system, the main idea of ​​which is: . Its specific implementation process is as follows ...

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Abstract

The invention discloses a method for improving the transmission efficiency of a multi-carrier communication system, which is characterized in that when a decoded result of the current data has an error, a receiver calculates mutual information sum of a sending symbo according to at least one used interleaving mode or predefined interleaving mode before the channel information and / or the current data and chooses the interleaving mode which enables the mutual information sum maximum as the interleaving mode used in the retransmission of the current data, and sends the interleaving mode and NACK feedback information to a sender; the sender determines whether the current data needs retransmission based on the NACK feedback information and uses the interleaving mode to interleave the retransmission data before the data retransmission. It is obvious that during the interleaving process to the signals, the invention considers the influence of the signal channel, thereby choosing a better interleaving mode. When the interleaving mode is used for dealing with modulation symbols, the probability of the transmission data to be successfully decoded can be improved, and the times of retransmission of data is reduced and the handling capacity of the system is improved.

Description

technical field [0001] The invention relates to the communication field, in particular to a hybrid automatic retransmission technology. SNR (Signal-to-noise ratio, signal-to-noise ratio) of wireless communication system Background technique [0002] Since the bit error performance of a wireless communication system determines the probability of successful decoding of transmitted data, people pay more and more attention to how to obtain a higher bit error performance. At present, some manufacturers propose some technologies to improve the bit error performance of the wireless communication system, such as chase combining (chase combining) technology, that is, I HARQ (Hybrid Automatic Request, hybrid automatic retransmission) technology. This technology stipulates that the error packet can be retransmitted by the sending end, and at the receiving end, the retransmitted error packet is combined with the error packet received last time, and then the combined data is decoded. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/18H04B7/005H04L27/26
Inventor 吕林军王锐刘坚能
Owner HUAWEI TECH CO LTD
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