Journal of Applied Sciences ›› 2013, Vol. 31 ›› Issue (2): 123-129.doi: 10.3969/j.issn.0255-8297.2013.02.003

• Communication Engineering • Previous Articles     Next Articles

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

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

  1. 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

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

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