| 无线多中继系统中判决门限辅助的快速Z转发协作 |
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| 引用本文： | 包建荣,林昀轩,刘超,姜斌,朱芳,何剑海.无线多中继系统中判决门限辅助的快速Z转发协作[J].电子与信息学报,2021,43(5):1315-1322. |
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| 作者姓名： | 包建荣 林昀轩 刘超 姜斌 朱芳 何剑海 |
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| 作者单位： | 1.杭州电子科技大学通信工程学院 杭州 3100182.宁波职业技术学院电子信息工程学院 宁波 315800 |
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| 基金项目： | 浙江省公益技术研究计划(LGG18F010011, LGG19F010004)，浙江省属高校基本科研业务费专项资金 (GK209907299001-003)，国家自然科学基金(U1809201)，浙江省自然科学基金(LY20F010010) |
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| 摘 要： | 针对Z向转发(ZF)协作所有中继节点均参与协作转发导致的能耗利用不合理问题， 该文提出了一种适用于多中继场景下的门限辅助判决快速Z转发(DT-FZF)协作。当中继节点处接收信号对数似然比(LLR)的绝对值小于门限时，中继节点不参与协作转发；否则中继节点协作转发经截断后的对数似然比(LLR)。放大转发(AF)、译码转发(DF)、分段转发(PF)和ZF协作可看作DT-FZF协作的特殊情况。在三中继系统，误比特率(BER)为10–3时，相比ZF协作，所提协作可获得约0.8 dB的性能增益。
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| 关 键 词： | 多中继网络 协作通信 快速Z向转发 判决门限 |
| 收稿时间： | 2020-03-20 |
Decision Threshold-aided Fast Z-Forward in Wireless Multirelay Communications |
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| Jianrong BAO,Yunxuan LIN,Chao LIU,Bin JIANG,Fang ZHU,Jianhai HE.Decision Threshold-aided Fast Z-Forward in Wireless Multirelay Communications[J].Journal of Electronics & Information Technology,2021,43(5):1315-1322. |
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| Authors: | Jianrong BAO Yunxuan LIN Chao LIU Bin JIANG Fang ZHU Jianhai HE |
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| Affiliation: | 1.School of Telecommunication Engineering, Hangzhou Dianzi University, Hangzhou 310018, China2.School of Electronic Information Engineering, Ningbo Polytechnic, Ningbo 315800, China |
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| Abstract: | In consideration of improper power allocation and insufficient relay selection in the current Z-Forward (ZF) scheme, an efficient Decision Threshold-aided Fast Z-Forward (DT-FZF) scheme is proposed to improve power and transmission efficiency. When the absolute value of the Log-Likelihood Ratio (LLR) of a source-relay reception is less than the decision threshold, the relay remains quiet. Otherwise, it directly sends the truncated LLR to the destination. In addition, the proposed DT-FZF scheme incorporates the Amplify-Forward(AF), Decode-Forward(DF), Piecewise-Forward(PF) and ZF schemes, all of which can be the special case of the proposed scheme. At a Bit Error Rate (BER) is of 10–3, the DT-FZF scheme outperforms the ZF scheme by approximately 0.8 dB in a three-relay system. |
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