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HARQ (Hybrid Automatic Repeat Request) method based on maximum distance separable codes

A Maximum Distance, Coding Technology

Active Publication Date: 2015-12-16
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the above-mentioned HARQ method still cannot perform correct decoding and restore the original information when the channel state is very poor, and propose a HARQ method and device based on maximum distance separable coding

Method used

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  • HARQ (Hybrid Automatic Repeat Request) method based on maximum distance separable codes
  • HARQ (Hybrid Automatic Repeat Request) method based on maximum distance separable codes
  • HARQ (Hybrid Automatic Repeat Request) method based on maximum distance separable codes

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Embodiment

[0044] How to apply a kind of HARQ method based on maximum distance separable coding of the present invention to improve error correction ability below in conjunction with the transmission of specific files, such as figure 1 As shown, adopting the HARQ based on the SPC code includes the following steps:

[0045] Step 1. Divide the file to be transmitted into multiple data packets, and perform an XOR operation on each data packet to obtain a verification packet.

[0046] In the HARQ system, if the received data packet passes the inspection and finds an error, it will be retransmitted, and there is a maximum number of retransmissions. If all data packets have been retransmitted for the maximum number of times, but the data packets still cannot be decoded correctly, a check packet needs to be transmitted, and the check packet and the data packet are combined for common decoding.

[0047] The process of obtaining the inspection package can be shown in the following example. Divide...

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Abstract

The invention relates to a HARQ (Hybrid Automatic Repeat Request) method based on maximum distance separable codes and belongs to the technical field of communication. The coding performing of the HARQ method is improved by adopting a coding mode with maximum distance separable code characteristics, such as SPC (Single Parity Check) codes, so that the coding performance is improved, the correction capability is further is increased, correct decoding and original information retrieval can be achieved when a channel state is poor, that is to say, a check packet is combined to correctly decode wrongly-transmitted data packets. Compared with the traditional HARQ method, the method performs normal transmission and has the same complexity as the prior art when the channel state is good, and transmits the check packet to assist decoding when the channel state is poor, so that the error correction capability is improved, and the block error rate performance is improved.

Description

technical field [0001] The present invention relates to a hybrid automatic repeat request (HARQ) method based on maximum distance separable coding in wireless communication, in particular to a method based on the characteristics of maximum distance separable coding to improve under poor channel conditions, thereby A HARQ method capable of improving error correction capability belongs to the technical field of communication. Background technique [0002] In the research process of the communication system, how to improve the data transmission rate and the quality of service are two crucial research focuses. Error control technology is to control the errors that occur in the transmission process through coding, remove or correct them, and improve the reliability of transmission. The purpose is to increase the data transmission rate as high as possible without reducing the quality of service. Forward Error Correction (ForwardErrorCorrection, FEC) and automatic retransmission (...

Claims

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Application Information

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IPC IPC(8): H04L1/18H04L1/00
CPCH04L1/004H04L1/1812
Inventor 费泽松上官成林贾岱于含笑
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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