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Hybrid Automatic-Repeat-reQuest Systems for Cooperative Wireless Communications

Hoang Anh Ngo, Lajos Hanzo
2014 IEEE Communications Surveys and Tutorials  
-DF relaying: In contrast to the AF relaying, in DF relaying the pilot symbols only cope with a single channel (SR channel or RD channel).  ...  optimization, where the normalized distance of d sr = 0.70 was used for AF, and d sr = 0.10 for DF relaying.  ... 
doi:10.1109/surv.2013.071913.00073 fatcat:ct2gqy36i5fuzbnnarvk3j6jiq

Coding and system design for quantize-map-and-forward relaying

Vinayak Nagpal, I-hsiang Wang, Milos Jorgovanovic, David Tse, Borivoje Nikolic
2013 IEEE Journal on Selected Areas in Communications  
In this paper we develop a low-complexity coding scheme and system design framework for the half duplex relay channel based on the Quantize-Map-and-Forward (QMF) relay- ing scheme.  ...  We propose the use of binary LDPC codes for encoding at the source and LDGM codes for mapping at the relay.  ...  In DF and CF, the relay maps its estimate to a random codeword before forwarding, whereas in AF it forwards an uncoded signal.  ... 
doi:10.1109/jsac.2013.130807 fatcat:mzqtkypg4vfb5mgw7hqr6elb44

Coding and system design for quantize-map-and-forward relaying

Vinayak Nagpal, I-hsiang Wang, Milos Jorgovanovic, David Tse, Borivoje Nikolic
2013 IEEE Journal on Selected Areas in Communications  
In this paper we develop a low-complexity coding scheme and system design framework for the half duplex relay channel based on the Quantize-Map-and-Forward (QMF) relaying scheme.  ...  We propose the use of binary LDPC codes for encoding at the source and LDGM codes for mapping at the relay.  ...  In DF and CF, the relay maps its estimate to a random codeword before forwarding, whereas in AF it forwards an uncoded signal.  ... 
doi:10.1109/jsac.2013.6658244 fatcat:ccvihnlnfrcodkohwmosn2hhiu

Multiple-Antenna Cooperative Wireless Systems: A Diversity–Multiplexing Tradeoff Perspective

M. Yuksel, E. Erkip
2007 IEEE Transactions on Information Theory  
CF continues to perform optimally.  ...  We find that CF is DMT optimal for half-duplex relaying as well, and is the first protocol known to achieve the half-duplex relay DMT. We next study the multiple-access relay channel (MARC) DMT.  ...  Nicholas Laneman, and the anonymous reviewers for their help in the organization of the paper.  ... 
doi:10.1109/tit.2007.904972 fatcat:7kyt7kudjvat3jgy22fu2gcssa

Relay Aided Intelligent Reconfigurable Surfaces: Achieving the Potential Without So Many Antennas [article]

Xiaoyan Ying, Umut Demirhan, Ahmed Alkhateeb
2020 arXiv   pre-print
Further, thanks to dividing the IRS reflection process over two surfaces, the position and orientation of these surfaces can be optimized to extend the wireless communication coverage and enhance the system  ...  This paper proposes a novel relay-aided intelligent reconfigurable surface (IRS) architecture for future wireless communication systems.  ...  AF/DF relays.  ... 
arXiv:2006.06644v1 fatcat:cihhrhmoqzdgddnajhvarlxgkq

Multi-Antenna Cooperative Wireless Systems: A Diversity-Multiplexing Tradeoff Perspective [article]

Melda Yuksel, Elza Erkip
2007 arXiv   pre-print
CF continues to perform optimally.  ...  We find that CF is DMT optimal for half-duplex relaying as well, and is the first protocol known to achieve the half-duplex relay DMT. We next study the multiple-access relay channel (MARC) DMT.  ...  ACKNOWLEDGMENT The authors would like to thank Dr. Gerhard Kramer, whose comments improved the results, and the guest editor Dr. J.  ... 
arXiv:cs/0609122v2 fatcat:q6nuflju4jgllnanpm6jikmkdm

PLC Networks with In-Band Full-Duplex Relays

Francisco J. Canete, Gautham Prasad, Lutz Lampe
2020 2020 IEEE International Symposium on Power Line Communications and its Applications (ISPLC)  
To estimate such performance, we focus on orthogonal frequency division multiplexing (OFDM) systems, which are standard in PLC.  ...  We present analyses and numerical results to demonstrate the superior operating performance of IBFD-based relay-aided networks over the legacy half-duplex ones, and contrast the extent of performance enhancement  ...  , i.e., C T = min[C 1 , C 2 ], (21) a result that applies for all the three considered configurations of FD1-DF, FD2-DF, and FD3-DF. 4) IBFD-AF: Finally, the capacity for IBFD-AF is analogous to the HD-AF  ... 
doi:10.1109/isplc48789.2020.9115410 dblp:conf/isplc/CanetePL20 fatcat:orbppgfwrzevlm2g4hslbp6clq

Research Issues, Challenges, and Opportunities of Wireless Power Transfer-Aided Full-Duplex Relay Systems

Zhongxiang Wei, Xu Zhu, Sumei Sun, Yufei Jiang, Ahmed Al-Tahmeesschi, Mingzhu Yue
2018 IEEE Access  
Existing time-splitting or power-splitting structure based-WPT-aided FD relay systems can only realize FD operation in one of the time slots or only forward part of the received signal to the destination  ...  Specific classifications and performance metrics of WPT-aided FD relay systems are summarized. Some future research is also envisaged for WPT-aided FD systems.  ...  An AF relay amplifies the received signal from the source and forwards the mixed signal, including the desired signal, noise and self-interference, to the destination.  ... 
doi:10.1109/access.2017.2779607 fatcat:xnmbtc6h2fggthqrtn62kilssa

Jointly Optimal Channel and Power Assignment for Dual-Hop Multi-Channel Multi-User Relaying

Mahdi Hajiaghayi, Min Dong, Ben Liang
2012 IEEE Journal on Selected Areas in Communications  
The joint optimization problem naturally leads to a mixed-integer program.  ...  We consider the problem of jointly optimizing channel pairing, channel-user assignment, and power allocation, to maximize the weighted sum-rate, in a single-relay cooperative system with multiple channels  ...  Relaying Strategy We initially focus on DF relaying but will later show how the proposed method can be applied to other relaying schemes, such as AF and CF.  ... 
doi:10.1109/jsac.2012.121026 fatcat:qivdq2ippjba5gikxhbrebapv4

Relay-Assisted Technology in Optical Wireless Communications: A Survey

Wenwen Liu, Jupeng Ding, Jiong Zheng, Xifeng Chen, Chih-Lin I
2020 IEEE Access  
Two common types of relaying systems are AF and DF.  ...  eavesdropping devices; the dual-hop of secrecy performance mixed RF-UOWC system [192] is examined, they adopt AF relay scheme with fixed gain or variable gain and a dual-hop DF mixed RF/UOWC system  ... 
doi:10.1109/access.2020.3031288 fatcat:btvricldhncjfitqtyls4c5by4

Sum MSE Minimization for Downlink Multi-Relay Multi-User MIMO Network

2014 KSII Transactions on Internet and Information Systems  
(BS) transmitter, relay precoders and user receivers to minimize sum mean square error (SMSE) for multi-relay multi-user (MRMU) networks.  ...  The numerical results verify that the proposed methods provide comparable performance to that of a full relay cooperation bound (FRCB) method while outperforming the simple amplify-and-forward (SAF) and  ...  Amplify-and-forward (AF) and decode-and-forward (DF) are conventional relaying protocols [2] , which are also known as non-regenerative and regenerative relaying, respectively.  ... 
doi:10.3837/tiis.2014.08.009 fatcat:gklyhgocuvbgfez6xnrdsumdea

Cooperative network coding in relay-based IMT-advanced systems

Mugen Peng, Changqing Yang, Zhongyuan Zhao, Wenbo Wang, Hsiao-Hwa Chen
2012 IEEE Communications Magazine  
NETWORK CODED TWO-WAY COOPERATIVE RELAY In a two-way relay scenario, the transmitter and receiver have the same functions, and a relay works on a DF or AF model.  ...  To enhance user experience, cooperative relaying protocols such as AF and DF can be utilized, and it was shown that it outperforms conventional non-cooperative protocols.  ...  He served as the general chair, TPC chair, and symposium chair for many international conferences. He has served or serves as an Editor or/and Guest Editor for numerous technical journals.  ... 
doi:10.1109/mcom.2012.6178837 fatcat:pxnsgfdstrenne3m37nlj6osra

Multi-Pair Two-Way Massive MIMO Relaying with Zero Forcing: Energy Efficiency and Power Scaling Laws

Jun Qian, Christos Masouros, Michail Matthaiou
2019 IEEE Transactions on Communications  
It can be observed that when transmit powers are small resulting in lower SINRs, the performance of DF relaying can outperform that of AF relaying and an optimal τ * p can be obtained to maximize the sum  ...  Since in our following simulations, we consider a more general power configuration, where SINRs are not small enough for DF relaying to outperform AF relaying; therefore, we only focus on the performance  ...  Lemma 2: Assume that h i ∼ CN 0, σ 2 i I M and h j ∼ CN 0, σ 2 j I M are mutually independent when i j, i, j = 1, ..., K.  ... 
doi:10.1109/tcomm.2019.2959329 fatcat:yg33dphfabg25irnaiz5bp7f2q

Distributed minimum euclidean distance based precoding for wireless sensor network

Viet-Hoa Nguyen, Olivier Berder, Charlotte Langlais, Baptiste Vrigneau
2015 2015 International Conference on Computing, Networking and Communications (ICNC)  
In this context, two kinds of relaying, amplify and forward or decode and forward protocols, are investigated.  ...  This protocol is based on the deployment of a virtual 2 × 2 max-dmin precoding over one source, one forwarding relay, both equipped with one antenna and a destination involving 2 antennas.  ...  ACKNOWLEDGMENT This work has received a French state support granted to the CominLabs excellence laboratory and managed by the National Research Agency in the "Investing for the Future" program under reference  ... 
doi:10.1109/iccnc.2015.7069469 dblp:conf/iccnc/NguyenBLV15 fatcat:yeew2wk3fvfutnl7bqle2lpct4

QUILT: A Decode/Quantize-Interleave-Transmit approach to cooperative relaying

Siddhartha Brahma, Melissa Duarte, Ayan Sengupta, I-Hsiang Wang, Christina Fragouli, Suhas Diggavi
2014 IEEE INFOCOM 2014 - IEEE Conference on Computer Communications  
This paper proposes and evaluates QUILT, a system for physical-layer relaying that seamlessly adapts to the underlying network configuration to achieve competitive or better performance as compared to  ...  QUILT combines on-demand, opportunistic use of Decode-Forward (DF) or Quantize-Map-Forward (QMF) followed by interleaving at the relay, with hybrid decoding at the destination that extracts information  ...  Thus QUILT synthesizes on-demand relaying and opportunistic selection of DF or QMF to achieve a consistently good performance across variable configurations.  ... 
doi:10.1109/infocom.2014.6848197 dblp:conf/infocom/BrahmaDSWFD14 fatcat:tki3ao6j5zb75i3hy6m3oo723e
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