采用数字喷泉码和旋转星座图的多跳中继传输机制

doi:10.3969/j.issn.0255-8297.2013.02.003

应用科学学报 ›› 2013, Vol. 31 ›› Issue (2): 123-129.doi: 10.3969/j.issn.0255-8297.2013.02.003

采用数字喷泉码和旋转星座图的多跳中继传输机制

雷维嘉，刘慧锋，谢显中

重庆邮电大学移动通信技术重庆市重点实验室，重庆400065

收稿日期:2011-12-04 修回日期:2012-05-14 出版日期:2013-03-25 发布日期:2012-05-14
通信作者: 雷维嘉，博士，教授，研究方向：无线通信传输技术，E-mail：leiwj@cqupt.edu.cn
作者简介:雷维嘉，博士，教授，研究方向：无线通信传输技术，E-mail：leiwj@cqupt.edu.cn
基金资助:
国家自然科学基金(No.61271259)；重庆市自然科学基金(No.CTSC2011jjA40006)；重庆市教委科学技术研究项目基金(No.KJ120501, No. KJ120502, No. KJ110530)；重庆邮电大学博士启动基金(No. A2011-03)；重庆市科委重点实验室专项经费资助

Multi-hop Relay Transmission Scheme Using Digital Fountain Code and Rotated Constellation

LEI Wei-jia, LIU Hui-feng, XIE Xian-zhong

Chongqing Key Laboratory of Mobile Communications Technology,
Chongqing University of Posts and Telecommunications, Chongqing 400065, China

Received:2011-12-04 Revised:2012-05-14 Online:2013-03-25 Published:2012-05-14

摘要/Abstract

摘要： 利用数字喷泉编码可有效提高多跳中继传输的效率. 提出一种基于数字喷泉码的中继多跳传输机制，从两方面改善中继转发性能：每两个中继组成中继对，采用旋转星座调制技术获得信号空间分集增益，但不降低信道的频谱效率；根据改进的合并算法对中继转发的喷泉编码数据包进行线性组合，获得数据包分集效果，提高信道利用率，缩短传输时间. 仿真结果显示，实现数据包分集和信号空间分集后，多跳中继传输效率显著提高，传输时间有所缩短.

关键词: 多跳, 中继传输, 数字喷泉码, 旋转星座, 数据包分集

Abstract: In multi-hop relay transmission, digital fountain codes can greatly improve transmission efficiency. A multi-hop relay transmission scheme based on fountain codes is proposed, which improves data relay performance in two ways: 1) Two relay nodes form a relay pair, and by using rotated constellation modulation,
signal space diversity gain is obtained without sacrificing bandwidth efficiency. 2) An improved encoded packets linear combination algorithm is used to rebuild the encoded packets by the relay to realize packet diversity. Simulation results show that transmission efficiency of the multi-hop relay transmission is improved considerably, and transmission time reduced.

Key words: multi-hop, relay transmission, digital fountain code, rotated constellations, packet diversity

中图分类号:

TN925

雷维嘉，刘慧锋，谢显中. 采用数字喷泉码和旋转星座图的多跳中继传输机制[J]. 应用科学学报, 2013, 31(2): 123-129.

LEI Wei-jia, LIU Hui-feng, XIE Xian-zhong. Multi-hop Relay Transmission Scheme Using Digital Fountain Code and Rotated Constellation[J]. Journal of Applied Sciences, 2013, 31(2): 123-129.

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采用数字喷泉码和旋转星座图的多跳中继传输机制

Multi-hop Relay Transmission Scheme Using Digital Fountain Code and Rotated Constellation

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