检索结果-内蒙古大学图书馆

A new approach for two-way relaying networks: improving performance by successive interference cancellation, digital network coding and opportunistic relay selection

引用

WIRELESS networkS 2020年第2期26卷 1315-1329页

作者： Son, Pham Ngoc Duy, Tran Trung Ho Chi Minh City Univ Technol & Educ Ho Chi Minh City Vietnam Posts & Telecommun Inst Technol Dept Telecommun Ho Chi Minh City Vietnam

In this paper, we propose a new approach based on combination of successive interference cancellation (SIC), digital network coding (DNC), and opportunistic relay selection in a two-way cooperative scheme in which two source nodes send simultaneously their packets to each other with a help of multiple relaying nodes, called as SIC-DNC protocol. In the proposed SIC-DNC protocol, the cooperative relays use the SIC technique to decode sequentially the packets from received sum signals, and then encode these packets by the DNC technique. These relays operate in the half-duplex mode, and suffer interference signals from imperfect SIC operations. A best relay is selected by the opportunistic relay selection based on taking maximization of signal-to-interference-plus-noise ratios from a successful decoding relay set to two source nodes in the last time slot. Exact and asymptotic closed-form outage probability expressions are obtained to evaluate the proposed SIC-DNC protocol, and then are verified by performing the Monte Carlo simulations. Our results show performance improvement of the proposed SIC-DNC protocol because of increase of the number of the cooperative relays, decrease of the residual interference signal powers, and respect to optimal relay locations and optimal power allocation coefficients of the near source. In addition, insightful comparisons with a conventional two-way decode-and-forward scheme are provided to prove highlight performances in asymmetric two-way cooperative schemes whereas the proposed SIC-DNC protocol owns better spectrum utilization efficiency. Finally, the simulation results are harvested to valid the exact and asymptotic analysis values.

关键词： Two-way relaying scheme Successive interference cancellation digital network coding Opportunistic relay selection Non-orthogonal multiple access

来源：评论

学校读者我要写书评

暂无评论

Opportunistic relaying with analogue and digital network coding for two-way parallel relay network

引用

IET COMMUNICATIONS 2014年第12期8卷 2200-2206页

作者： Dai, Mingjun Wang, Hui Lin, Xiaohui Zhang, Shengli Chen, Bin Shenzhen Univ Coll Informat Engn Shenzhen Key Lab Adv Commun & Informat Proc Shenzhen Peoples R China Xidian Univ State Key Lab Integrated Serv Networks Xian Peoples R China

A pair of terminals exchanging information via a layer of parallel relay nodes under slow fading is considered. Two protocols are proposed based on the combination of opportunistic relaying (OR) with analogue network coding (ANC), named ORANC, or with digital network coding (DNC), named ORDNC, respectively. Two schemes/versions of ORDNC, including 2-phase ORDNC (2P-ORDNC) and 3-phase ORDNC (3P-ORDNC) are proposed. Their outage performances are investigated. ORANC and 2P-ORDNC are proved to achieve optimal diversity-multiplexing tradeoff (DMT), whereas 3P-ORDNC is proved to be suboptimal. However, from diversity viewpoint only, all the above schemes are proven to achieve full diversity order. Simulation results verify the analysis, and show that 3P-ORDNC and ORANC shows advantage at low-and high-data rate regions, respectively.

关键词： network coding relay networks (telecommunication) diversity reception protocols opportunistic relaying analogue network coding digital network coding ORANC two-way parallel relay network parallel relay nodes slow fading 2-phase ORDNC 3-phase ORDNC optimal diversity-multiplexing tradeoff optimal DMT full diversity order

来源：评论

学校读者我要写书评

暂无评论

Two-Way SWIPT Relaying networks with Nonlinear Power Splitting, digital network coding and Selection Combining

引用

WIRELESS PERSONAL COMMUNICATIONS 2023年第4期133卷 2445-2465页

作者： Dao, Thu-Thuy Thi Son, Pham Ngoc Ind Univ Ho Chi Minh City Fac Elect Technol 12 Nguyen Bao Ho Chi Minh City 700000 Vietnam Ho Chi Minh City Univ Technol & Educ Fac Elect & Elect Engn 01 Vo Ngan Ho Chi Minh City 700000 Vietnam

This paper studies nonlinear energy harvesting of decode-and-forward relay in a two-way cooperation system with simultaneous wireless information and power transfer (SWIPT). The radio signals in the system are transmitted through relaying and direct links in three timeslots over Rayleigh fading channels. The selection combining method is used to select better signal from two links, thereby improving the quality of received signals at destination. Besides, power splitting and digital network coding techniques are employed at the relay to harvest energy, decode received signals and re-encode transmitted signal. The exact closed-form analytical and approximate expressions of the outage probability are derived and validated via Monte Carlo simulations. We also investigate the outage probability as a function of the main parameters as the transmit power of the source, the saturation threshold power, the power allocation coefficient, the energy conversion efficiency, the time allocation ratio of the signal phase and the location of the relay to see their influence on the system. The results show that the proposed system can achieve smaller outage probabilities compared to the case does not have the direct link. And for each specific set of system parameters, we can find an optimal power allocation coefficient value so that the system has the smallest outage probability.

关键词： Two-way relay network Nonlinear energy harvesting digital network coding Selection combining

来源：评论

学校读者我要写书评

暂无评论

Analysis of digital network coding in Dual Hop networks

Analysis of Digital Network Coding in Dual Hop Networks

引用

2nd IEEE International Conference on Communications and Signal Processing (ICCSP)

作者： Mangayarkarasi, P. Jayanthi, E. Jayashri, S. Adhiparasakthi Engn Coll Dept Elect & Commun Engn Melmaruvathur India

ISBN: (纸本)9781467348669;9781467348652

In this paper, the information packets from the two end nodes are transmitted to the intermediate relay node with the help of store and forward routing solution to increase the network capacity in two-way relay network is analyzed with the concept of digital network coding. For this relay system, we investigate the outage probability and Ergodic capacity in Rician and Nakagami-m fading environment. It is observed from the simulation results that by increasing the K values for various m values, the outage probability is minimized and maximum Ergodic capacity is achieved.

关键词： Two-way Relay network digital network coding outage probability Ergodic capacity

来源：评论

学校读者我要写书评

暂无评论

BER Performance of Three-Phase digital network coding Employing TAS/OFDM in the Presence of Imperfect Channel State Information 23

BER Performance of Three-Phase Digital Network Coding Employ...

引用

23nd Signal Processing and Communications Applications Conference (SIU)

作者： Coskun, Ahmet Faruk Kucur, Oguz TUBITAK BILGEM TR-41470 Gebze Turkey Gebze Tekn Univ Elekt Muhendisligi Bolumu TR-41470 Gebze Turkey

ISBN: (纸本)9781467373869

This paper examines the average error performance of a three-phase digital network coding scheme that employs single antenna selection for orthogonal frequency-division multiplexed signal transmission in frequency-selective Rayleigh fading channels. The average error performance of the scheme with a single-antenna relay is observed for convolutional-coded M-ary symbols in the presence of channel estimation errors. An improved antenna selection criterion providing enhanced performance gains is proposed and demonstrated.

关键词： Orthogonal frequency-division multiplexing digital network coding antenna selection channel estimation errors

来源：评论

学校读者我要写书评

暂无评论

Relay Selection Based Space-Time coding for Two-Way Wireless Relay networks Using digital network coding

Relay Selection Based Space-Time Coding for Two-Way Wireless...

引用

ISWCS 2013;The Tenth International Symposium on Wireless Communication Systems

作者： Samer Alabed Marius Pesavento Anja Klein Darmstadt University of Technology

In this paper, we propose a novel decode-and-forward dual-relay selection technique based on Alamouti space time coding for twoway wireless relay networks (TWRNs). The two- and the threephase TWRN protocol are used in the first and second version of the proposed technique, respectively, to exchange the information symbols of the communicating terminals. In order not to waste any power for transmitting information symbols known at any terminal and hence to improve the achievable coding gain, the proposed technique uses the concept of digital network coding in which the transmitted symbols of both terminals are combined at the relays into a symbol of the same constellation. To further improve the reliability of the communication and offer additional coding gain, Alamouti space time coding is incorporated in our technique. Simulation results show a substantially improved bit error rate (BER) performance of the proposed techniques as compared to the the state-of-the art techniques.

关键词： Two-way wireless relay networks Relay selection Distributed space-time coding Cooperative diversity digital network coding

来源：评论

学校读者我要写书评

暂无评论

Analysis of digital network coding in Dual Hop networks

Analysis of Digital Network Coding in Dual Hop Networks

引用

International Conference on Communication and Signal Processing

作者： P. Mangayarkarasi E. Jayanthi S. Jayashri the Department of Electronics and Communication Engineering Adhiparasakthi Engineering College Melmaruvathur. Principal Adhiparasakthi Engineering College Melmaruvathur.

ISBN: (纸本)9781467348652

关键词： Two-way Relay network digital network coding outage probability Ergodic capacity

来源：评论

学校读者我要写书评

暂无评论

Throughput and stability of digital and analog network coding for wireless networks with single and multiple relays 08

Throughput and stability of digital and analog network codin...

引用

Proceedings of the 4th Annual International Conference on Wireless Internet

作者： Yalin Evren Sagduyu Dongning Guo Randall Berry Northwestern University Evanston IL

ISBN: (纸本)9789639799363

We evaluate the throughput and stability properties of digital and analog network coding for wireless terminals exchanging broadcast traffic with the assistance of relay nodes. For stochastically varying traffic, the stable operation is compared under the different schemes of plain routing, and digital and analog network coding, at the packet and the signal levels, respectively. For each network coding scheme, the queue dynamics are specified for the terminal and relay nodes, and the maximum throughput region is optimized over all transmission schedules. We then give generalizations of the well-known back-pressure policy for each scheme, which accounts for the coupling of the queues due to network coding and is throughput optimal, i.e., it stabilizes the network whenever this is possible. Our initial analysis focuses on a network with a single relay node. We then discuss extensions of this to arbitrary terminal-relay configurations in a general multihop network. A general framework is established to construct the maximum throughput region and throughput optimal scheduling is jointly designed with network coding for relay networks with general channel rates. For any achievable rates in the maximum throughput region the dynamic scheduling and coding ensure that the average queue lengths at the terminal and relay nodes are asymptotically bounded.

关键词： digital network coding analog network coding throughput optimal control stable throughput region queue stability

来源：评论

学校读者我要写书评

暂无评论

Improved Bi-Directional Three-Phase Single-Relay Selection Technique for Cooperative Wireless Communications

引用

Computers, Materials & Continua 2022年第1期70卷 999-1015页

作者： Samer Alabed Issam Maaz Mohammad Al-Rabayah College of Engineering and Technology American University of the Middle EastKuwait

Single-relay selection techniques based on themax-min criterion can achieve the highest bit error rate(BER)performance with full diversity gain as compared to the state-of-the-art single-relay selection ***,in this work,we propose a modified max-min criterion by considering the differences among the close value channels of all relays while selecting the best relay *** proposed criterion not only enjoys full diversity gain but also offers a significant improvement in the achievable coding gain as compared to the conventional ***,in this article,an improved bi-directional three-phase single-relay selection technique using the decodeand-forward protocol for wireless cooperative communication networks that enhances the overall network performance in terms of BER is proposed and its performance is proved analytically and through Monte-Carlo *** specifically,the proposed criterion is first used to select the best *** that the selected relay-node forwards the information symbols of the communicating terminals after performing a digital network coding to minimize power *** our simulations,we show that our proposed technique outperforms the best-known single relay selection ***,we prove that the BER results obtained from our conducted simulations perfectly match those obtained from the theoretical analysis.

关键词： Performance analysis cooperative diversity schemes digital network coding relay selection schemes

来源：评论

学校读者我要写书评

暂无评论

Exact Outage Probability of Two-Way Decode-and-Forward Scheme with Opportunistic Relay Selection Under Physical Layer Security

引用

WIRELESS PERSONAL COMMUNICATIONS 2014年第4期77卷 2889-2917页

作者： Pham Ngoc Son Kong, Hyung Yun Univ Ulsan Dept Elect Engn Ulsan 680749 South Korea Univ Ulsan Sch Elect Engn Ulsan 680749 South Korea

The combination of cooperative communication and physical layer security is an effective approach to overcome the disadvantages of the fading environment as well as to increase the security capacity of the wireless network. In this paper, we propose a two-way decode-and-forward scheme with a relay selection method. In the proposed protocol, two source nodes communicate with each other with the help of intermediate relays under the eavesdropping of another wireless node, called the eavesdropper node. The best relay, which is chosen by the max-min strategy, uses digital network coding to enhance secure communication and spectrum use efficiency. The system performance is analyzed and evaluated in terms of the exact closed-form outage probability over Rayleigh fading channels. The Monte-Carlo simulation results are presented to verify the theoretical analysis. Finally, the proposed protocol is compared with the two-way protocol, which does not use digital network coding.

关键词： Two-way scheme Physical layer security Decode-and-forward digital network coding Opportunistic relay selection Outage probability

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：