快衰落瑞利信道下分布式线性卷积空时码的分集增益

刘毅; 马莹; 刘轩

doi:10.11999/JEIT180343

快衰落瑞利信道下分布式线性卷积空时码的分集增益

doi: 10.11999/JEIT180343

刘毅^{1, 2, ,},
马莹¹,
刘轩¹

1.
西安电子科技大学综合业务通讯网理论及关键技术国家重点实验室西安 710071
2.
中国电子科技集团公司数据链技术重点实验室西安 710068

基金项目: 国家自然科学基金(61671341)，数据链技术重点实验室开放基金(CLDL-20182412)，国家111计划基金(B08038)

详细信息

作者简介:
刘毅：男，1978年生，教授，研究方向为宽带无线通信技术、空时编码与协作通信技术、通信对抗

马莹：女，1993年生，硕士生，研究方向为宽带无线通信技术、协作通信与非正交多址技术

刘轩：男，1991年生，硕士生，研究方向为宽带无线通信技术、协作通信与空时编码技术

通讯作者:
刘毅　yliu@xidian.edu.cn

中图分类号: TN929.5
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出版历程
- 收稿日期: 2018-04-13
- 修回日期: 2018-09-21
- 网络出版日期: 2018-10-19
- 刊出日期: 2019-01-01

Diversity Gain of Distributed Linear Convolutive Space-time Code on Fast Fading Rayleigh Channels

Yi LIU^{1, 2
, ,},
Ying MA¹,
Xuan LIU¹

1.
State Key Laboratory of Integrated Service Network, Xidian University, Xi’an 710071, China
2.
Key Laboratory of Data Link, China Electronics Technology Group Corporation, Xi’an 710068, China

Funds: The National Natural Science Foundation of China (61671341), The Foundation of Key Laboratory of Data Link (CLDL-20182412), The National Foundation of 111 Project (B08038)

摘要

摘要:
在无线中继网络中，中继节点间的随机传输延迟将导致显著的性能下降。因此，针对慢衰落瑞利信道提出可容忍随机时延的分布式线性卷积空时码(DLC-STC)，但该类空时码在快衰落信道下的分集性能尚未明确。该文从理论上证明了DLC-STC在快衰落瑞利信道下的分集增益。分析表明，DLC-STC虽然最初是在慢衰落信道下被提出的，但它在快衰落瑞利信道下通过利用最大似然(ML)接收机，仍可获得满异步协作分集增益，仿真结果验证了该理论分析，仿真结果同时表明：在快衰落瑞利信道下，DLC-STC采用MMSE-DFE接收机能够获得与ML接收机相同的分集增益。
- 快衰落瑞利信道 /
- 分布式线性卷积空时码 /
- 分集增益
Abstract:
In wireless relay networks, random transmission delays among relay nodes will lead to substantial performance degradation, for which delay-tolerant Distributed Linear Convolutive Space-Time Code (DLC-STC) is proposed. However, its diversity gain on fast fading Rayleigh channels is not clear. This paper analyzes the diversity gain of the DLC-STC on fast fading Rayleigh channels. It is shown that the DLC-STC can achieve full asynchronous cooperative diversity order with Maximum Likelihood (ML) receivers on fast fading Rayleigh channels, although it is originally proposed for slow fading channels. The numerical results verify the theoretical analysis and show that MMSE-DFE receivers, can collect the same diversity order as ML receivers on fast fading Rayleigh channels.
- Fast fading Rayleigh channels /
- Distributed-Linear-Convolutive Space-Time-Code (DLC-STC) /
- Diversity gain

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图 1 无线中继网络示意图

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图 2 快衰落瑞利信道上2中继协作网络的误比特率性能

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图 3 快衰落瑞利信道上3中继协作网络的误比特率性能

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