北京航空航天大学学报 ›› 2015, Vol. 41 ›› Issue (9): 1666-1672.doi: 10.13700/j.bh.1001-5965.2014.0645

• 论文 • 上一篇    下一篇

基于QC-LDPC码联合分层译码混合转发协作系统

张嵩1, 马林华1, 唐红1, 张海威2, 胡星1, 田雨3   

  1. 1. 空军工程大学 航空航天工程学院, 西安 710038;
    2. 宇航动力学国家重点实验室, 西安 71004;
    3. 中国人民解放军95876部队, 张掖 734100
  • 收稿日期:2014-10-17 出版日期:2015-09-20 发布日期:2015-09-29
  • 通讯作者: 马林华(1965—),男,陕西汉中人,教授,land_max@126.com,主要研究方向为信道编码、协作通信技术、移动自组织网络. E-mail:land_max@126.com
  • 作者简介:张嵩(1987—),男,山东荣成人,博士研究生,zhangsong1949@163.com
  • 基金资助:
    综合业务网理论及关键技术国家重点实验室(西安电子科技大学)开放研究课题(ISNI15-13)

Hybrid-and-forward cooperative system based on joint layered decoding of QC-LDPC codes

ZHANG Song1, MA Linhua1, TANG Hong1, ZHANG Haiwei2, HU Xing1, TIAN Yu3   

  1. 1. School of Aeronautics and Astronautics Engineering, Air Force Engineering University, Xi'an 710038, China;
    2. The State Key Laboratory of Astronautics Dynamics, Xi'an 71004;
    3. Unit 95876 of the People's Liberation Army, Zhangye 734100, China
  • Received:2014-10-17 Online:2015-09-20 Published:2015-09-29

摘要: 为了提高中继协作系统的整体性能,设计了基于QC-LDPC(Quasi-Cycle Low-Density Parity-Check)码联合分层译码的混合转发协作系统,给出了用于源节点和中继节点编码的QC-LDPC系统码的构造方法,并提出了适用于该协作系统的联合分层译码新算法. 根据传统译码转发和编码协作的特点,采用了中继混合转发协作策略,无论中继是否译码成功,中继节点都发送一定形式的冗余信息给目的节点,从而提高协作系统的编码增益和分集增益.仿真结果表明:所提出的混合转发协作系统可以充分发挥中继的分集和编码优势;与非协作系统相比,可以显著提高中继协作系统译码性能.

关键词: 中继协作系统, QC-LDPC码, 联合分层译码, 编码协作, 混合转发

Abstract: A hybrid-and-forward cooperative system based on the joint layered decoding of quasi-cycle low-density parity-check (QC-LDPC) codes was designed to improve the overall performance of the relay cooperative system. The construction method of the QC-LDPC systematic codes used between source node and relay node was presented and a new joint layered decoding algorithm for the cooperative system was proposed. According to the characteristics of traditional decode-and-forward and coded cooperation, a relay hybrid-and-forward cooperative strategy was adopted. Regardless of the decoding results of the relay, the relay node sent some redundant information to the destination node, so as to improve the coding gain and diversity gain of the cooperative system. Simulation results show that the designed hybrid-and-forward cooperative system can sufficiently play the advantages of diversity and coding brought by relay. Compared to non-cooperative system, the proposed hybrid-and-forward cooperative system can improve the decoding performance of the relay cooperative system.

Key words: relay cooperative system, quasi-cycle low-density parity-check (QC-LDPC) codes, joint layered decoding, coded cooperation, hybrid-and-forward

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