| An energy-efficiency approach for bidirectional amplified-and-forward relaying with asymmetric traffic in OFDM systems | |
Jia, Nianlong1; Feng, Wenjiang1; Zhong, Yuanchang1; Kang, Hong2
| |
| 2014 | |
| 发表期刊 | KSII Transactions on Internet and Information Systems
 |
| ISSN | 1976-7277 |
| 卷号 | 8期号:11页码:4087-4102 |
| 摘要 | Two-way relaying is an effective way of improving system spectral efficiency by making use of physical layer network coding. However, energy efficiency in OFDM-based bidirectional relaying with asymmetric traffic requirement has not been investigated. In this study, we focused on subcarrier transmission mode selection, bit loading, and power allocation in a multicarrier single amplified-and-forward relay system. In this scheme, each subcarrier can operate in two transmission modes: one-way relaying and two-way relaying. The problem is formulated as a mixed integer programming problem. We adopt a structural approximation optimization method that first decouples the original problem into two suboptimal problems with fixed subcarrier subsets and then finds the optimal subcarrier assignment subsets. Although the suboptimal problems are nonconvex, the results obtained for a single-tone system are used to transform them to convex problems. To find the optimal subcarrier assignment subsets, an iterative algorithm based on subcarrier ranking and matching is developed. Simulation results show that the proposed method can improve system performance compared with conventional methods. Some interesting insights are also obtained via simulation. © 2014 KSII. |
| 关键词 | Integer programming Iterative methods Network coding Network layers Orthogonal frequency division multiplexing Structural optimization Amplify-and-forward Approximation optimization Bi-directional Relaying Mixed integer programming Physical layer network coding (PNC) Sub-carrier assignment Transmission mode selections Two-way relay |
| DOI | 10.3837/tiis.2014.11.024 |
| 收录类别 | EI ; SCIE |
| 语种 | 英语 |
| WOS研究方向 | Computer Science ; Telecommunications |
| WOS类目 | Computer Science, Information Systems ; Telecommunications |
| WOS记录号 | WOS:000348047900025 |
| 出版者 | Korean Society for Internet Information |
| EI入藏号 | 20145000310329 |
| EI分类号 | 525.2 Energy Conservation ; 716.1 Information Theory and Signal Processing ; 723 Computer Software, Data Handling and Applications ; 921.5 Optimization Techniques ; 921.6 Numerical Methods |
| 原始文献类型 | Journal article (JA) |
| 出版地 | GANGNAM-GU |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | https://ir.cqcet.edu.cn/handle/39TD4454/2915 |
| 专题 | 人工智能与大数据学院 |
| 作者单位 | 1.College of Communication Engineering, Chongqing University, Chongqing; 400044, China; 2.Chongqing College of Electronic Engineering, Chongqing; 401331, China |
| 推荐引用方式 GB/T 7714 | Jia, Nianlong,Feng, Wenjiang,Zhong, Yuanchang,et al. An energy-efficiency approach for bidirectional amplified-and-forward relaying with asymmetric traffic in OFDM systems[J]. KSII Transactions on Internet and Information Systems,2014,8(11):4087-4102. |
| APA | Jia, Nianlong,Feng, Wenjiang,Zhong, Yuanchang,&Kang, Hong.(2014).An energy-efficiency approach for bidirectional amplified-and-forward relaying with asymmetric traffic in OFDM systems.KSII Transactions on Internet and Information Systems,8(11),4087-4102. |
| MLA | Jia, Nianlong,et al."An energy-efficiency approach for bidirectional amplified-and-forward relaying with asymmetric traffic in OFDM systems".KSII Transactions on Internet and Information Systems 8.11(2014):4087-4102. |
| 条目包含的文件 | 下载所有文件 | |||||
| 文件名称/大小 | 文献类型 | 版本类型 | 开放类型 | 使用许可 | ||
| Jia-2014-An energy-e（931KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | 浏览 下载 | |
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。
修改评论