The State Key Laboratory of Astronautics Dynamics

Fengcheng, China

The State Key Laboratory of Astronautics Dynamics

Fengcheng, China

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Zhang S.,PLA Air Force Aviation University | Ma L.,PLA Air Force Aviation University | Tang H.,PLA Air Force Aviation University | Zhang H.,The State Key Laboratory of Astronautics Dynamics | And 2 more authors.
Beijing Hangkong Hangtian Daxue Xuebao/Journal of Beijing University of Aeronautics and Astronautics | Year: 2015

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. ©, 2015, Beijing University of Aeronautics and Astronautics (BUAA). All right reserved.

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