检索结果-内蒙古大学图书馆

2011年无线通信与信号处理国际会议(WCSP 2011)

作者： Youyun XU Hua TIAN Wenwen LIANG Kui XU Institute of Communications Engineering PLA University of Science and TechnologyNanjing 210007 Chi Institute of Communications Engineering PLA University of Science and Technology Nanjing 210007 Ch

physical-layer network coding (PNC) has shown its power for improving the throughput effectively of the bi-directional relay system. Most of the existing PNC schemes are carried out under the assumption of perfect synchronization. In this paper, we provide some new insights into the joint design of Low-Density Parity-Check (LDPC)-coded and PNC for asynchronous bi-directional relay system with BPSK signaling. In particular, a novel LDPC and PNC joint design method is proposed for mitigating the performance degradation caused by the different timing offsets between relay and two source nodes. Simulation results show that the proposed joint design of LDPC and PNC scheme outperforms traditional method for bi-directional relay system in the presence of insufficient timing synchronization.

关键词： physical-layer network coding LDPC Bi-directional Relaying Timing Offset

来源：评论

学校读者我要写书评

暂无评论

Collision Resolution in Multiple Access networks with physical-layer network coding and Distributed Fountain coding

Collision Resolution in Multiple Access Networks with Physic...

引用

IEEE International Conference on Acoustics, Speech and Signal Processing

作者： G. Cocco C. Ibars D. Gunduz O. del Rio Herrero Centre Tecnologic de Telecomunicacions de Catalunya — CTTCParc Mediterrani de la Tecnologia Av. Carl Friedrich Gauss 7 08860 Castelldefels — Spain European Space Agency / ESTECNoordwijk — The Netherlands

ISBN: (纸本)9781457705380

We propose two new protocols based on physical layer network coding for collision resolution in multiple access networks. When a collision occurs the receiver decodes the sum of the collided packets and after a number of transmissions, equal to or slightly higher than the number of original packets, it can recover all of them. One of the proposed protocols based on fountain codes can resolve collisions by sending out just one acknowledgement (ACK), thus being particulary suited to networks with large round trip delays such as satellite networks. We carry out a comparison of the average delay achieved by the proposed schemes with other access techniques, and show how the performance can be improved with little coordination at the receiver.

关键词： physical-layer network coding fountain codes multiple access collision resolution satellite communications collision resolution physical layer fountain multiple access hierarchical network network coding Receivers Collisions access network SATELLITE networkS mean delay network

来源：评论

学校读者我要写书评

暂无评论

A MINIMUM POWER CONSUMPTION SCHEME FOR TWO-WAY RELAY WITH physical-layer network coding

A MINIMUM POWER CONSUMPTION SCHEME FOR TWO-WAY RELAY WITH PH...

引用

2010 2nd IEEE International Conference on network Infrasturcture & Digital Content(2010年第二届IEEE网络基础设施与数字内容国际会议 IC-NIDC 2010)

作者： Mingfeng Zhao Yajian Zhou Yixian Yang Dongxiao Ren School of Computer Science & Engineering University of Electronic Science and Technology of ChinaC School of Computer Science & Engineering University of Electronic Science and Technology of China

In this paper, we discuss physical-layer network coding (PLNC) in the two-way decode-forward (DF) relay to obtain total minimum power consumption (MPC) for the entire transmission process. The MPC and power allocation scheme for each node are obtained under a predetermined constraint of outage probability threshold in a Rayleigh fading channel environment. Numerical experimental results confirm that the proposed MPC scheme achieves much lower power consumption ratio than the existing schemes without PLNC on the condition of the same system outage guarantee.

关键词： physical-layer network coding Outage probability Minimum Power Consumption Power Consumption Ratio

来源：评论

学校读者我要写书评

暂无评论

An Optimal Power Allocation for Two-Way Relay Channel using physical-layer network coding 6th

An Optimal Power Allocation for Two-Way Relay Channel using ...

引用

2016 Sixth International Conference on Instrumentation and Measurement,Computer,Communication and Control (IMCCC2016)(第六届仪器测量、计算机通信与控制国际会议)

作者： Wenchao Yang Gang Wang Hailong Wang Xifeng Chen Zetao Yan Communication Research Center Harbin Institute of Technology HIT Harbin China Shenzhen Academy of Aerospace Technology Shenzhen China

ISBN: (纸本)9781509011964

physical-layer network coding (PNC) is the expanding of network coding (NC) in wireless *** has enhanced throughput,spectrum efficiency and robustness of wireless communication system to a large *** paper considers four kinds of asymmetric two-way relay channel model based on physical-layer network coding,and analyzes their corresponding outage probability performance respectively,showing the downlink channel has more influence on the communication performance compared with the uplink ***,based on two different principles of minimizing outage probability and maximizing sum-rate,we derive power allocation strategies and their closed-form expressions,*** results show that these schemes are superior to uniform power *** targeting the outage probability,the allocation strategy is a segmented function,which is judged by channel fading,the simulation results coincide with the theoretical ***,compared with hypothesis testing strategy,our allocation strategy has obvious advantages to adapt to the change of channel *** terms of the sum-rate,in comparison with uniform power allocation,about 2~3 dB power gain can be obtained.

关键词： physical-layer network coding two-way relay channel power allocation outage probability sum-rate

来源：评论

学校读者我要写书评

暂无评论

physical layer network coding Based on Integer Forcing Precoded Compute and Forward

引用

FUTURE INTERNET 2013年第3期5卷 439-459页

作者： Gupta, Smrati Vazquez-Castro, M. A. Autonomous Univ Barcelona Dept Telecommun & Syst Engn E-08193 Barcelona Spain

In this paper, we address the implementation of physical layer network coding (PNC) based on compute and forward (CF) in relay networks. It is known that the maximum achievable rates in CF-based transmission is limited due to the channel approximations at the relay. In this work, we propose the integer forcing precoder (IFP), which bypasses this maximum rate achievability limitation. Our precoder requires channel state information (CSI) at the transmitter, but only that of the channel between the transmitter and the relay, which is a feasible assumption. The overall contributions of this paper are three-fold. Firstly, we propose an implementation of CF using IFP and prove that this implementation achieves higher rates as compared to traditional relaying schemes. Further, the probability of error from the proposed scheme is shown to have up to 2 dB of gain over the existent lattice network coding-based implementation of CF. Secondly, we analyze the two phases of transmission in the CF scheme, thereby characterizing the end-to-end behavior of the CF and not only one-phase behavior, as in previous proposals. Finally, we develop decoders for both the relay and the destination. We use a generalization of Bezout's theorem to justify the construction of these decoders. Further, we make an analytical derivation of the end-to-end probability of error for cubic lattices using the proposed scheme.

关键词： compute and forward lattices relaying probability of error precoding physical-layer network coding signal-to-noise ratio

来源：评论

学校读者我要写书评

暂无评论

MIMO physical layer network coding Scheme in Two-Way Relay networks

MIMO Physical Layer Network Coding Scheme in Two-Way Relay N...

引用

International Conference on Mechatronics Engineering and Computing Technology (ICMECT)

作者： Xiao, Ke Jiang, Haiying Lu, Yuanyao North China Univ Technol Beijing 100144 Peoples R China

ISBN: (纸本)9783038351153

To enhance the ber performance of pseudo physical-layer network coding (ppnc) scheme, a new scheme called pseudo physical-layer soft network coding (ppsnc) scheme is proposed, ppsnc adopts soft information not hard decision information, and its ber performance is better than ppnc. Meanwhile ppsnc has no synchronization problem compared with physical-layer network coding (pnc) scheme. At the same time, we also discuss the performance of ppsnc in mimo environment. The simulation results show that mimo-ppsnc outperforms the other schemes.

关键词： physical-layer network coding mimo two-way relay channel pseudo physical-layer network coding

来源：评论

学校读者我要写书评

暂无评论

Max-Link Relay Selection with physical layer network coding in Two-Way Relay networks 10

Max-Link Relay Selection with Physical Layer Network Coding ...

引用

10th International Symposium onTelecommunications (IST)

作者： Mahdavi, Ala Jamshidi, Ali Keshavarz-Haddad, Alireza Shiraz Univ Sch Elect & Comp Engn Shiraz Iran

ISBN: (纸本)9781728180120

Buffer-aided relaying can considerably increase the reliability of wireless networks. In this paper, we propose a max-link relay selection method with physical layer network coding for wireless two-way relay systems. We derive closed form expression for outage probability both in unlimited and limited buffer size scenarios. Also, we introduce the novel term of relative diversity gain to compare relative advantage of buffer-aided relaying to conventional relaying. Numerical results show that the proposed method achieves better outage performance even with buffer size as small as 2, and reaches diversity gain two times of the number of relays for large buffer sizes.

关键词： Relay Selection physical-layer network coding outage probability buffer-aided relaying diversity analysis two-way relay

来源：评论

学校读者我要写书评

暂无评论

physical layer Implementation of network coding in Two-Way Relay networks

Physical Layer Implementation of Network Coding in Two-Way R...

引用

IEEE International Conference on Communications (ICC)

作者： Yang, Hongjuan Meng, Weixiao Li, Bo Wang, Gang Harbin Inst Technol Commun Res Ctr Harbin 150001 Peoples R China

ISBN: (纸本)9781457720536

network coding, which works in the network layer, is an effective technology to improve the throughput of two-way relay networks. In this paper, we compare the existing network coding schemes: traditional network coding (NC) scheme, physical-layer network coding (PNC) scheme and soft network coding (SNC) scheme, and propose a new physical layer scheme which can be seen as the implementation of network coding in two-way relay networks. Relay nodes combine the received signals from two source nodes before demodulation and channel decoding. The computational complexity and BER performance of the proposed scheme are analyzed compared with the previous schemes. Theoretical analysis show that the proposed scheme can save 50% computational cost of demodulation and channel decoding processes compared with NC scheme, meanwhile increase the power efficiency of the relay nodes in two-way relay networks significantly. Future works with the proposed scheme are also discussed.

关键词： physical layer implementation network coding two-way relay networks physical-layer network coding soft network coding

来源：评论

学校读者我要写书评

暂无评论

The Design of Protograph LDPC Codes for Channel-Coded physical-layer network coding

The Design of Protograph LDPC Codes for Channel-Coded Physic...

引用

IEEE Annual International Symposium on Personal, Indoor, and Mobile Radio Communications

作者： Pingping Chen Kaixiong Su Yi Fang Lingjun Kong School of Physics and Information Engineering Fuzhou University School of Information Engineering Guangdong University of Technology School of Computer Science and Technology Nanjing University of Posts & Communication

ISBN: (纸本)9781509032556

For two-way relay channel-coded physical network coding (CPNC) systems with sufficiently low code rate, the separate complete decoding (SCD) scheme outperforms the joint channel-physical network coding (JCNC) scheme. Hence, this paper addresses the design of protograph LDPC codes to approach the SCD-based CPNC capacity. In fact, due to virtual erasures induced by CPNC transmission, the conventional protograph that approaches point to point (P2P) AWGN capacity may not perform well in SCD-based CPNC channel in terms of error rates. We then use the finite-length EXIT chart to calculate iterative decoding threshold of a joint code graph formed by two codes in the SCD. Furthermore, we investigate the serial separate complete decoding (S-SCD) and parallel separate decoding (PSCD). Simulation results show that with the S-SCD, the proposed protograph codes have within 0.9 dB of their capacity limits for rates from 1/3 to 3/5.

关键词： physical-layer network coding Separate complete decoding Protograph code

来源：评论

学校读者我要写书评

暂无评论

A physical-layer network coding Aware Distributed Scheduling Policy

A Physical-Layer Network Coding Aware Distributed Scheduling...

引用

International Wireless Communications and Mobile Computing Conference

作者： Raphael Naves Gentian Jakllari Hicham Khalifé Vania Conan André-Luc Beylot Thales Communications & Security IRIT-INPT/ENSEEIHT

ISBN: (纸本)9781509043736

physical-layer network coding (PLNC) was first introduced as a solution to increase the throughput in simple bidirectional communication schemes. Unlike most wireless communication techniques which try to avoid collisions, PLNC allows two simultaneous transmissions to a common receiver. In this work, we propose a MAC layer distributed and realistic scheduling policy targeting PLNC based networks. In order to easily operate in large ad-hoc networks, our solution is completely decentralized and runs in constant time. By basing the transmission priority of every node on the queue sizes of its local neighbors and PLNC opportunities, our solution ensures high throughput when compared to classical interferencefree scheduling. Both our theoretical analysis corroborated by our simulation results highlight that the proposed algorithm outperforms existing scheduling policies with throughput gains of around 35%.

关键词： physical-layer network coding scheduling multi-hop networks

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：