检索结果-内蒙古大学图书馆

9th International Symposium on Communication Systems, networks & Digital Signal Processing (CSNDSP)

作者： Abu-Almaalie, Z. Ghassemlooy, Z. Le-Minh, H. Aslam, N. Northumbria Univ Fac Engn & Environm Opt Commun Res Grp Newcastle Upon Tyne NE1 8ST Tyne & Wear England Northumbria Univ Fac Engn & Environm Computat Intelligence Res Grp Newcastle Upon Tyne NE1 8ST Tyne & Wear England

ISBN: (纸本)9781479925810

physical layer network coding (PNC) technique has been adopted in recent works for increasing the system throughput in a two way relay channel (TWRC) where two users exchange their information via an intermediate node. In this paper, we investigate the effectiveness of increasing numbers of users for PNC technique where multiple pairs of users swap their information simultaneously through a single relay node for TWRC. This scheme uses interleave division multiple access (IDMA) for multiuser detection at the receiver. Moreover, a common chip level interleaver is shared for each pair of users instead of using a distinct chip level interleaver as in traditional IDMA. In addition, channel coding is integrated with the newly proposed scheme to achieve more reliable communications. The performance of the proposed system is investigated for the TWRC in terms of the bit error rate (BER).

关键词： physical layer network coding Interleave division multiple access Convolutional code network coding Repetition code

来源：评论

学校读者我要写书评

暂无评论

Femtocell as a Relay with Application of physical layer network coding

Femtocell as a Relay with Application of Physical Layer Netw...

引用

IEEE 11th Consumer Communications and networking Conference (CCNC)

作者： Oduola, Wasiu Opeyemi Qian, Lijun Li, Xiangfang Prairie View A&M Univ Dept Elect & Comp Engn Prairie View TX 77446 USA

ISBN: (纸本)9781479923557

This study takes advantage of the ability of physical-layer network coding (PNC) to embrace electromagnetic interference, improve spectral efficiency and achieve throughput optimality in a femtocell operated as a relay. Specifically, we make a case for a femtocell operating as a relay and utilizing PNC to eliminate the interference that exists between macrocells user equipments (MUEs) and femtocells home users equipments (HUEs) in an Opened Subscriber Group (OSG) co-channel deployment. With PNC implemented at the HNB relay, it becomes possible for the relay to take advantage of the information signals transmitted from both the HUE and MUE rather than treating the MUE's signals as interference. To guarantee the Service Quality (QoS) of femtocell users, we develop the closed-form expressions of the cummulative distributions function (CDF) of the received signal-to-noise ratios (SNR) and the outage probability of the HUE analytically. Simulation results match the analytical results and it is demonstrated that PNC is suitable for a relay operated femtocell network.

关键词： Femtocell physical layer network coding Outage Probability Cellular Systems Uplink

来源：评论

学校读者我要写书评

暂无评论

Practical Full Duplex physical layer network coding 79

Practical Full Duplex Physical Layer Network Coding

引用

IEEE 79th Vehicular Technology Conference (VTC-Spring)

作者： Tedik, Semiha Kurt, Gunes Karabulut Istanbul Tech Univ Dept Elect & Telecommun Engn TR-80626 Istanbul Turkey

ISBN: (纸本)9781479944828

We propose a practical network code for the wireless two-way relay channel where all nodes communicate in full duplex (FD) mode. The physical layer network coding (PNC) operation is applied with the FD operating nodes, reducing the transmission time to a single time slot, hence doubling the spectral efficiency when compared to classical PNC systems. In our system, binary phase shift keying modulated signals are transmitted over Rayleigh fading channels. We derive the theoretical error rates at the relay and end nodes according to the maximum likelihood detection rule, in case of non-ideal self-interference cancellation. Theoretical results are also verified via simulations.

关键词： Full duplex transmission physical layer network coding self-interference

来源：评论

学校读者我要写书评

暂无评论

physical layer network coding for the K-User Multiple Access Relay Channel

引用

IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS 2013年第6期12卷 3107-3119页

作者： Muralidharan, Vijayvaradharaj T. Rajan, B. Sundar Indian Inst Sci Dept Elect Commun Engn Bangalore 560012 Karnataka India

We propose a physical layer network coding (PNC) scheme for the K-user wireless Multiple Access Relay Channel, in which K source nodes want to transmit messages to a destination node D with the help of a relay node R. The proposed scheme involves (i) Phase 1 during which the source nodes alone transmit and (ii) Phase 2 during which the source nodes and the relay node transmit. At the end of Phase 1, the relay node decodes the messages of the source nodes and during Phase 2 transmits a many-to-one function of the decoded messages. To counter the error propagation from the relay node, we propose a novel decoder which takes into account the possibility of error events at R. It is shown that if certain parameters are chosen properly and if the network coding map used at R forms a Latin Hypercube, the proposed decoder offers the maximum diversity order of two. Also, it is shown that for a proper choice of the parameters, the proposed decoder admits fast decoding, with the same decoding complexity order as that of the reference scheme based on Complex Field network coding (CFNC). Simulation results indicate that the proposed PNC scheme offers a large gain over the CFNC scheme.

关键词： Diversity gain Latin Hypercubes multiple access relay channel physical layer network coding

来源：评论

学校读者我要写书评

暂无评论

Practical Full Duplex physical layer network coding

Practical Full Duplex Physical Layer Network Coding

引用

IEEE Vehicular Technology Conference

作者： Semiha Tedik Gunes Karabulut Kurt Department of Electronics and Telecommunications Engineering Istanbul Technical University

ISBN: (纸本)9781479944811

关键词： Full duplex transmission physical layer network coding Self-interference

来源：评论

学校读者我要写书评

暂无评论

HePNC: Design of physical layer network coding with Heterogeneous Modulations

HePNC: Design of Physical Layer Network Coding with Heteroge...

引用

IEEE Global Communications Conference

作者： Haoyuan Zhang Lei Zheng Lin Cai Dept. of E&CE University of Victoria

ISBN: (纸本)9781479935130

physical layer network coding (PNC) has been proposed for the two-way-relay scenario. The existing PNC solutions typically use the same modulation for the source nodes' signals which may not be desirable for practical situations when the amount of data exchanged between the two source nodes are un-equal and their links to the relay node are heterogeneous. In this paper, physical layer network coding with heterogeneous modulations (HePNC) has been proposed to further improve the spectrum and energy efficiency considering the above mentioned heterogeneity. Similar to the existing PNC, HePNC also includes two stages: the multiple access (MA) stage for two source nodes to transmit data to the relay and the broadcast (BC) stage for the relay to broadcast data to both source nodes. The main difference is that at the MA stage, HePNC can select heterogeneous modulation methods according to the channel conditions and the ratio of data to be exchanged. We present two sample designs of HePNC, including QPSK-BPSK and 8PSK-BPSK, and obtain the mapping rules for the relay's de-noising and forwarding based on the neighbor clustering algorithm. In addition, we discuss the end-to-end bit-error-rate, energy efficiency and optimal relay location selection when HePNC is used. Extensive simulations demonstrated that the proposed HePNC can substantially enhance the end-to-end throughput and the energy efficiency compared to the homogeneous PNC, and thus it is a promising technology for future green communication systems.

关键词： error statistics network coding quadrature phase shift keying relay networks (telecommunication) 8PSK-BPSK HePNC QPSK-BPSK broadcast stage end-to-end bit-error-rate energy efficiency green communication system heterogeneous modulation method heterogeneous modulations multiple access stage neighbor clustering algorithm optimal relay location selection physical layer network coding Binary phase shift keying Bit error rate Communication systems Relays Throughput

来源：评论

学校读者我要写书评

暂无评论

Beamforming for Secure Two-Way Relay networks with physical layer network coding

Beamforming for Secure Two-Way Relay Networks with Physical ...

引用

IEEE Global Communications Conference

作者： Cong Zhang Hui Gao Tiejun Lv Yueming Lu Xin Su Key Laboratory of Trustworthy Distributed Computing and Service Ministry of Education School of Information and Communication Engineering Beijing University of Posts and Telecommunications Tsinghua National Laboratory for Information Science and Technology Tsinghua University

ISBN: (纸本)9781479935130

We investigate the secrecy beamforming in two-way relay channels (TWRC) with physical layer network coding (PNC). The multi-antenna relay broadcasts the superimposed signal of two user messages with secrecy beamforming after receiving the signals transmitted by the two legitimate users. We first propose a lower bound of the secrecy sum rate to quantify the secrecy performance of the TWRC with PNC. Because the maximization of the lower bound is non-convex under total power constraint, we propose a joint beamforming and power allocation scheme, in which the problem is successively approximated by several convex semidefinite programs. In order to reduce the complexity, we further propose an suboptimal scheme with closed-form solution. Numerical results indicate that the proposed schemes with PNC achieve much better secrecy sum-rate performance than the traditional AF schemes.

关键词： array signal processing network coding optimisation relay networks (telecommunication) TWRC convex semidefinite programs joint beamforming and multiantenna relay broadcasts physical layer network coding power allocation scheme secrecy beamforming suboptimal scheme two-way relay channels two-way relay networks Approximation methods Array signal processing Optimization Protocols Relays Resource management Vectors

来源：评论

学校读者我要写书评

暂无评论

On the Use of Cooperative physical layer network coding for Energy Efficient Routing

引用

IEEE TRANSACTIONS ON COMMUNICATIONS 2013年第4期61卷 1498-1509页

作者： Akhtar, Auon Muhammad Nakhai, Mohammad Reza Aghvami, A. Hamid Kings Coll London Inst Telecommun London England

In this paper, we focus on energy efficient routing in wireless ad hoc networks. We exploit modulo combining of continuous-time signals arriving at a receiving node from a number of synchronized transmitting nodes and introduce a cooperative physical layer network coding (CPLNC) scheme. To demonstrate the effectiveness of the proposed scheme in reducing energy consumption, we propose two routing algorithms that utilize CPLNC as a basic building block. Through analysis, we show that with sufficiently long packets, the proposed algorithms can achieve energy saving gains of up to 37% and 62% with respect to the conventional shortest-path routing algorithm in regular line and grid networks, respectively, using less number of hops. We incorporate CPLNC into two major energy efficient routing algorithms and derive threshold distances that enable the current node to intelligently decide whether it should use CPLNC or point to point transmission to the next hop. Simulation results confirm that the proposed and the modified algorithms based on CPLNC outperform their conventional counterparts in terms of achieving significant energy saving gains in networks of randomly distributed nodes.

关键词： Cooperative transmission energy efficiency physical layer network coding Rayleigh fading routing wireless ad hoc networks

来源：评论

学校读者我要写书评

暂无评论

Performance Analysis of Adaptive physical layer network coding for Wireless Two-Way Relaying

引用

IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS 2013年第3期12卷 1328-1339页

作者： Muralidharan, Vijayvaradharaj T. Rajan, B. Sundar Indian Inst Sci Dept Elect Commun Engn Bangalore 560012 Karnataka India

The performance analysis of adaptive physical layer network-coded two-way relaying scenario is presented which employs two phases: Multiple access (MA) phase and Broadcast (BC) phase. The deep channel fade conditions which occur at the relay referred as the singular fade states fall in the following two classes: (i) removable and (ii) non-removable singular fade states. With every singular fade state, we associate an error probability that the relay transmits a wrong network-coded symbol during the BC phase. It is shown that adaptive network coding provides a coding gain over fixed network coding, by making the error probabilities associated with the removable singular fade states contributing to the average Symbol Error Rate (SER) fall as SNR-2 instead of SNR-1. A high SNR upper-bound on the average end-to-end SER for the adaptive network coding scheme is derived, for a Rician fading scenario, which is found to be tight through simulations. Specifically, it is shown that for the adaptive network coding scheme, the probability that the relay node transmits a wrong network-coded symbol is upper-bounded by twice the average SER of a point-to-point fading channel, at high SNR. Also, it is shown that in a Rician fading scenario, it suffices to remove the effect of only those singular fade states which contribute dominantly to the average SER.

关键词： Denoise-and-forward physical layer network coding wireless two-way relaying

来源：评论

学校读者我要写书评

暂无评论

Joint Relay Selection and Power Allocation for Two-Way Relaying with physical layer network coding

引用

IEEE COMMUNICATIONS LETTERS 2013年第2期17卷 301-304页

作者： Thinh Phu Do Wang, Jin Soo Song, Iickho Kim, Yun Hee Kyung Hee Univ Dept Elect & Radio Engn Yongin South Korea Korea Adv Inst Sci & Technol Dept Elect Engn Taejon 305701 South Korea

We consider a two-way relay (TWR) network with multiple relays, where the relays adopt physical layer network coding based on decode-and-forward. A joint relay selection and power allocation (RS-PA) scheme is proposed to improve the symbol error probability (SEP) of the TWR network using BPSK modulation under the total power constraint. For the proposed scheme and the benchmark scheme performing RS without PA, the average SEP of the TWR network is derived analytically and confirmed with simulation results. It is shown that the proposed scheme provides an asymptotic SNR gain of about 1.76 dB over the benchmark scheme at the same diversity order.

关键词： physical layer network coding power allocation relay selection symbol error probability two-way relay

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：