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Bit Error Rate for physical-layer network coding With M-QAM-OFDM Signals

IEEE WIRELESS COMMUNICATIONS LETTERS 2025年第1期14卷 153-157页

作者： Doost, Ehsan Atefat Saghezchi, Firooz B. Navarro, Antonio Rodriguez, Jonathan Univ Aveiro Inst Telecomunicacoes Campus Univ Santiago P-3810193 Aveiro Portugal Rhein Westfal TH Aachen Fac Elect Engn & Informat Technol D-52074 Aachen Germany Univ Aveiro Dept Elect Telecommun & Informat P-3810193 Aveiro Portugal Univ South Wales Fac Comp Engn & Sci Pontypridd CF37 1DL Wales

In this letter, we derive the closed-form analytical expressions for the exact Bit Error Rate (BER) of physical layer network coding (PNC) systems considering M-ary Quadrature Amplitude Modulation (M-QAM) schemes in O... 详细信息

关键词： Relays Symbols Bit error rate AWGN channels Noise Binary phase shift keying network coding Signal to noise ratio OFDM Precoding physical-layer network coding two-way relay channel M-QAM bit error rate

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physical-layer network coding: Tutorial, survey, and beyond

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physical COMMUNICATION 2013年 6卷 4-42页

作者： Liew, Soung Chang Zhang, Shengli Lu, Lu Chinese Univ Hong Kong Dept Informat Engn Hong Kong Hong Kong Peoples R China Shenzhen Univ Dept Commun Engn Shenzhen Guangdong Peoples R China

The concept of physical-layer network coding (PNC) was proposed in 2006 for application in wireless networks. Since then it has developed into a subfield of network coding with wide implications. The basic idea of PNC is to exploit the mixing of signals that occurs naturally when electromagnetic (EM) waves are superimposed on one another. In particular, at a receiver, the simultaneous transmissions by several transmitters result in the reception of a weighted sum of the signals. This weighted sum is a form of network coding operation by itself. Alternatively, the received signal could be transformed and mapped to other forms of network coding. Exploiting these facts turns out to have profound and fundamental ramifications. Subsequent works by various researchers have led to many new results in the domains of (1) wireless communication, (2) information theory, and (3) wireless networking. The purpose of this paper is fourfold. First, we give a brief tutorial on the basic concept of PNC. Second, we survey and discuss recent key results in the three aforementioned areas. Third, we examine a critical issue in PNC: synchronization. It has been a common belief that PNC requires tight synchronization. Recent results suggest, however, that PNC may actually benefit from asynchrony. Fourth, we propose that PNC is not just for wireless networks;it can also be useful in optical networks. We provide an example showing that the throughput of a passive optical network (PON) could potentially be raised by 100% with PNC. (C) 2012 Elsevier B.V. All rights reserved.

关键词： physical-layer network coding network coding Two-way relay channel Wireless networks

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physical-layer network coding Based Throughput-Optimal Transmission for Bidirectional Traffic

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IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY 2018年第4期67卷 3130-3144页

作者： Noh, Wonjong Lim, Sung Hoon Kim, Tae-Suk Samsung Elect Co Ltd Suwon 16677 South Korea Korea Inst Ocean Sci & Technol Busan 49111 South Korea Pai Chai Univ Dept Business Adm Daejeon 35345 South Korea

In this study, we develop a physical-layer network coding based throughput-optimal transmission scheduling policy, which we call network coding aware maximum differential backlog (NCMDB), and demonstrate its throughput optimality. As the proposed policy requires an NP-hard network-wide centralized algorithm to determine the optimal transmission schedule, we propose a distributed NCMDB based on link prioritization (D-NCMDB) as a lower bound approach. We further propose a bidirectionality-aware route establishment scheme for the best application of the NCMDB and D-NCMDB policies. Simulations confirm that compared to the signal-to-interference-based interference avoidance transmission approach and random maximal physical-layer network coding approach, the proposed D-NCMDB scheme offers 48% and 27% increased throughput, 78% and 63% reduced access delay, and 80% and 20% enlarged stability, respectively. The proposed distributed transmission scheduling scheme can be employed in future communication networks in which both the number of nodes and the amount of interference increase exponentially.

关键词： Bidirectional path establishment distributed scheduling physical-layer network coding throughput-optimal transmission control

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physical-layer network coding Based Decoding Scheme for Random Access

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IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY 2019年第4期68卷 3550-3564页

作者： Sun, Zhuo Yang, Lei Yuan, Jinhong Ng, Derrick Wing Kwan Univ New South Wales Sch Elect Engn & Telecommun Sydney NSW 2052 Australia

In this paper, we propose an enhanced low-complexity binary physical-layer network coding (PNC) based decoding scheme for random access systems with binary phase-shift keying modulation to improve the system throughput. In the proposed scheme, the linear combinations of collided users' messages in each time slot are first obtained by exploiting a low-complexity PNC decoding scheme. Based on the decoded linear combinations within a MAC frame, we then propose an enhanced message-level successive interference cancellation algorithm to recover more users' messages. We propose an analytical framework for the PNC-based decoding scheme and derive a tight approximation of the system throughput for the proposed scheme. Subsequently, the number of repeated transmissions of a message, i.e., the number of replicas transmitted by each user, is optimized to further improve the system throughput and energy efficiency. Interestingly, the optimization results show that the optimal number of replicas for maximizing the energy efficiency is a constant for all offered loads. On the other hand, the optimal number of replicas that maximizes the system throughput decreases as the offered load increases. Numerical results show that the derived analytical results closely match with the simulation results. Furthermore, the proposed scheme achieves a considerable throughput improvement, compared to the CRDSA++ scheme.

关键词： Multiple access machine-type communication physical-layer network coding

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physical-layer network coding Scheme over Asymmetric Rayleigh Fading Two-Way Relay Channels

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MOBILE networkS & APPLICATIONS 2018年第1期23卷 80-85页

作者： Li, Bo Ding, Xuesong Yang, Hongjuan Liu, Gongliang Peng, Xiyuan Harbin Inst Technol Weihai Sch Informat & Elect Engn Weihai 264200 Peoples R China Harbin Inst Technol Sch Elect Engn & Automat Harbin 150001 Heilongjiang Peoples R China

To improve the bit error rate (BER) performance of physical-layer network coding (PNC) in asymmetric two-way relay channels (TWRC), in this paper, we study a new PNC scheme named bi-quadrature physical-layer network coding (BQ-PNC) for Rayleigh flat fading TWRC. In BQ-PNC scheme, the two users employ quadrature carriers and the relay node use quadrature combining rather than XOR which is very common in other PNC schemes. We give the BER analysis of BQ-PNC and simulate the performance. Theoretical and simulation results show that the proposed scheme can significantly enhanced the BER performance, either in symmetric or asymmetric cases. Especially for uplink asymmetric TWRC, BQ-PNC can provide more than 4 dB gain compared with PNC scheme.

关键词： Two-way relay channels physical-layer network coding Asymmetric channels Bit error rate performance

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physical-layer network coding in Shallow Sea Underwater Acoustic Channels 6th

Physical-Layer Network Coding in Shallow Sea Underwater Acou...

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6th International Conference on Communications, Signal Processing, and Systems (ICCSPS)

作者： Li, Bo Ding, Xuesong Yang, Hongjuan Liu, Gongliang Peng, Xiyuan Harbin Inst Technol Weihai Weihai Peoples R China Sci & Technol Commun Networks Key Lab Shijiazhuang Hebei Peoples R China Harbin Inst Technol Harbin Heilongjiang Peoples R China

ISBN: (纸本)9789811065712;9789811065705

To improve the limited-bandwidth in shallow underwater acoustic communication, we propose to apply the physical-layer network coding (PNC) to this communication system. This paper analyzes the model of shallow underwater acoustic channel - "Ray Model" and uses the adaptive equalization technique to eliminate the inter-symbol interference (ISI). Besides, we also study the principle of PNC and research the demodulation and mapping scheme in relay node. Finally, we combine the channel model and PNC technique in two-way relay communication (TWRC) system. The performance simulation of PNC is compared with the traditional multi-hop scheme and network coding (NC) scheme. The result shows that PNC scheme can improve the throughput of system but do not increase the bit error rate (BER) in the shallow underwater acoustic communication. It provides a new research direction for shallow underwater acoustic communication, and also expands a new field for PNC applications.

关键词： Underwater acoustic channel Multi-path model physical-layer network coding Bit error rate Throughput

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physical-layer network coding and Information Combining for the Multiple-access Relay network 59

Physical-layer Network Coding and Information Combining for ...

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59th Annual IEEE Global Communications Conference (IEEE GLOBECOM) / Conference on network coding and Applications (NetCod)

作者： Yang, Lei Yang, Tao Xie, Yixuan Yuan, Jinhong An, Jianping Univ New South Wales Sch Elect Engn & Telecommun Sydney NSW Australia Univ Technol Sydney Global Big Data Technol Ctr Sydney NSW Australia Beijing Inst Technol Sch Informat & Elect Beijing Peoples R China

ISBN: (纸本)9781509013289

We propose a new linear physical-layer network coding and information combining scheme for the K-user fading multiple-access relay network (MARN), which consists of K users, one relay and one destination. The relay and the destination are connected via a rate-constraint backhaul link. In the proposed scheme, the K users transmit signals simultaneously. The relay and the destination receive the superimposed signals distorted by fading and noise. The relay reconstructs L linear combinations of the K users' messages, referred to as L network coded (NC) messages, and forwards them to the destination. The destination then attempts to recover all K users' messages by combining its received signals and the NC messages obtained from the relay. We develop an explicit expression on the selection of the coefficients of the NC messages at the relay that minimizes the end-to-end error probability at a high signal to noise ratio regime. Numerical results demonstrate that our proposed scheme outperforms the benchmark scheme significantly in an MARN.

关键词： physical-layer network coding multiple-access relay information combining compute-and-forward

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physical-layer network coding Aided Two-Way Relay for Transmitted-Reference UWB networks

Physical-Layer Network Coding Aided Two-Way Relay for Transm...

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54th Annual IEEE Global Telecommunications Conference (GLOBECOM)

作者： Gao, Hui Su, Xin Lv, Tiejun Wang, Taotao Wang, Zicheng BUPT Sch Informat & Commun Engn Beijing 100876 Peoples R China TNList Beijing 100084 Peoples R China

ISBN: (纸本)9781424492688

A physical-layer network coding (PNC) aided two-way relay scheme is proposed for Transmitted-Reference (TR) UWB networks. In particular, a novel noncoherent UWB-PNC detector is investigated for the TR-UWB networks. Inheriting the simplicity of the TR-UWB receiver, the proposed PNC detector is based on the autocorrelation receiver (AcR) with simple structure, which effectively suppresses the multi-user interference and harvests the multipath energy. Equipped with the proposed TR UWB-PNC detector, the relay node first detects the bitwise XORed symbol directly from the overlapped information bearing waveforms transmitted from the source nodes, then broadcasts the estimate of the XORed symbol to achieve efficient two-way relay. Simulation results show that, compared with the non-relay, one-way relay and two-way relay with time division multiple access (TDMA) and network coded broadcasting (NCBC), the proposed PNC aided two-way scheme significantly improves both the energy and spectral efficiencies of the TR-UWB networks.

关键词： Detectors Interference Multiuser detection Peer to peer computing Relays Synchronization TR-UWB receiver Time division multiple access autocorrelation receiver bitwise XORed symbol interference (signal) multi-user interference multipath energy network coded broadcasting network coding noncoherent UWB-PNC detector overlapped information physical-layer network coding radio receivers relay node time division multiple access time division multiple access transmitted-reference UWB networks two-way relay scheme ultra wideband communication

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physical-layer network coding: A High Performance PHY-layer Decoder

Physical-layer Network Coding: A High Performance PHY-layer ...

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IEEE International Conference on Communications (ICC)

作者： Ullah, Shakeel Salamat Liew, Soung Chang Lu, Lu You, Lizhao Chinese Univ Hong Kong Dept Informat Engn Hong Kong Hong Kong Peoples R China Chinese Univ Hong Kong Inst Network Coding Hong Kong Hong Kong Peoples R China

ISBN: (纸本)9781479966646

physical-layer network coding (PNC) can potentially boost the throughput of a two-way relay network by 100% compared with conventional packet forwarding schemes. However, the complexity of PNC channel decoders can be considerably higher than the complexity of channel decoders for point-to-point communication systems. Although many PNC channel decoders proposed to date have good decoding performance, they may not be feasibly implemented in practical systems due to their high computation complexities. This paper presents a reduced-complexity decoder (RCD), a PNC decoder with adjustable decoding complexity that is amenable to real-time implementation. We experimentally evaluate the performance-complexity trade-off of RCD. Our experimental results show that RCD can achieve substantial throughput gain over state-of-the-art decoders proposed for real-time PNC systems.

关键词： physical-layer network coding two-way relay channel convolutional codes reduced-complexity decoder USRP GNU Radio

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physical-layer network coding in Wireless Multi Access Relay Channel

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International Conference on Applied Informatics and Communication (ICAIC 2011)

作者： Yu, Hanghong Zhang, Jun Beihang Univ Dept Elect Informat Engn Beijing Peoples R China

ISBN: (纸本)9783642232251

network coding recognized as an efficient solution on improving network throughput is a hot spot in the area of wireless network. However, interference affects quality of communication seriously, which is a harmful factor in wireless fading environment. One protocol named physical-layer network coding not only increase network throughput but also takes advantage of interference between signals. How to separate the mixed signal resulting from the broadcast nature of wireless channel is an area with little discussion. This paper firstly proposes a PNC decoding solution for mixed signal separation in Multi Access Relay Channel(MARC) model. Then we use our estimation result about the channel coefficients to give a discussion on the capacity theorem of MARC model using PNC. In conclusion, the simulation result tells that the proposed method ARD PNC performs well in PNC with higher bandwidth utility and lower error rate. At the same time, the capacity using PNC is also improved comparing to traditional direct transmission.

关键词： physical-layer network coding Wireless Fading Channel Capacity Theorem Multi Access Relay Channel

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