| 基于叠加编码的时间压缩转发中继协议 |
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| 引用本文： | 石苏龙,杨龙祥,朱洪波.基于叠加编码的时间压缩转发中继协议[J].南京邮电大学学报(自然科学版),2014,34(5):34-40. |
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| 作者姓名： | 石苏龙 杨龙祥 朱洪波 |
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| 作者单位： | 南京邮电大学江苏省无线通信重点实验室,江苏南京,210003 |
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| 基金项目： | 国家重点基础研究发展计划(973计划)，国家自然科学基金，江苏省自然科学基金重点研究专项，江苏省高校研究生科研创新计划 |
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| 摘 要： | 传统重复编码解码转发中继具有简单、易实现的特点,在无线通信中得到了广泛的研究.重复编码的采用使得中继接收和转发必须占用同等的信道资源,这在中继信道各链路质量存在差异的情况下会导致系统频谱效率低下.为此,文中提出了一种基于叠加编码的中继协议,利用叠加编码在信息速率调节方面的灵活性,既保证重复编码的使用,又允许对中继转发时间进行适当压缩,进而均衡各链路负载.理论分析及仿真表明,在信源及中继至信宿的组合链路较好的情形下,基于叠加编码的中继协议实现了更高的频率利用率.
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| 关 键 词： | 中继 解码转发 重复编码 叠加编码 频率利用率 |
Time Compress and Forward Relaying Protocol Based on Superposition Coding |
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| SHI Su-long,YANG Long-xiang,ZHU Hong-bo.Time Compress and Forward Relaying Protocol Based on Superposition Coding[J].Journal of Nanjing University of Posts and Telecommunications,2014,34(5):34-40. |
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| Authors: | SHI Su-long YANG Long-xiang ZHU Hong-bo |
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| Institution: | ( Jiangsu Key Lab of Wireless Communications, Nanjing University of Posts and Telecommunications, Nanjing 210003, China) |
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| Abstract: | Despite the simplicity of conventional repetition coding decode and forward relaying, it is easy to be applied in existing communication systems. Above coding has inherent limitation in channel resource allocation due to repetition coding can rise to inefficient spectrum utilization when the source to relay, and the combined source and relay to destination links are of disparity qualities. A new repetition coding rela- ying scheme is proposed by using the flexibility of superposition coding in rate control. It can use the repetition coding and compress the forwarding time. Then, the load in links is balanced. The analysis and the numerical results demonstrate that, in the case of source link and relay to destination link in good state, the proposed relaying protocol gives high spectral efficiency. |
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| Keywords: | relay decode-and-forward repetition coding superposition coding spectral efficiency |
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