Performance Analysis of SNR-Based Incremental Hybrid Decode-Amplify-Forward Cooperative Relaying Protocol

Performance Analysis of SNR-Based Incremental Hybrid Decode-Amplify-Forward Cooperative Relaying Protocol
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基于信噪比的增量式混合解码-放大-转发协作中继协议的性能分析

DOI:
10.1109/tcomm.2015.2427166
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发表时间:
2015-04
影响因子:
8.3
通讯作者:
Yuan, Dongfeng
Yuan, Dongfeng
中科院分区:
计算机科学2区
文献类型:
--
作者:
Bai, Zhiquan;Jia, Jianlan;Wang, Cheng-Xiang;Yuan, Dongfeng

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本文提出并分析了一种适用于三节点协同中继系统的新型中继方案——增量式混合解码-放大-转发中继(IHDAF),该方案中中继根据源、中继和目的地之间的信道质量选择保持静默或以解码-转发(DF)或放大-转发(AF)方式发送消息。推导了IHDAF协议的中断概率和误码率的封闭表达式。确定中继端和目的端两个重要信噪比阈值之间的最优关系,以决定是否需要合作以及是否实现合作模式。此外,还研究了功率分配方案、信噪比阈值和中继位置对IHDAF协议中断概率和误码率的影响。理论分析和仿真结果表明,IHDAF中继方案优于增量选择性DF (ISDF)、增量选择性DF (IDF)和协同STBC中继方案,特别是当中继离目的地较近时。
In this paper, we propose and analyze a new relaying scheme for the three-node cooperative relaying system, named as incremental hybrid decode-amplify-forward relaying (IHDAF), where the relay may choose to keep silent or transmit message in decode-and-forward (DF) or amplify-and-forward (AF) mode based on the qualities of the channels among the source, relay, and destination. Closed-form expressions of the outage probability and bit error rate (BER) of the proposed IHDAF protocol are derived. The optimal relationship of the two important signal-to-noise ratio (SNR) thresholds at the relay and destination to decide whether cooperation is necessary and the cooperative mode has been achieved. Moreover, the effects of the power allocation schemes, SNR thresholds, and relay locations on the outage probability and BER of the IHDAF protocol are studied. Theoretical analysis and simulation results show that the IHDAF relaying scheme outperforms the incremental-selective DF (ISDF), incremental DF (IDF), and cooperative STBC schemes, especially when the relay is close to the destination.
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