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Journal articles on the topic 'Decode-and-forward Cooperative Relaying'

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Author: Grafiati

Published: 6 September 2023

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1

Sheng, Zhengguo, Bong Jun Ko, and Kin K. Leung. "Power Efficient Decode-and-Forward Cooperative Relaying." IEEE Wireless Communications Letters 1, no. 5 (October 2012): 444–47. http://dx.doi.org/10.1109/wcl.2012.062512.120301.

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2

Lee, Jong-Ho, Illsoo Sohn, Sungju Song, and Yong-Hwa Kim. "Cooperative Decode-and-Forward Relaying for Secure Multicasting." ETRI Journal 38, no. 5 (October 1, 2016): 934–40. http://dx.doi.org/10.4218/etrij.16.0115.1029.

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3

Savazzi, Stefano, and Umberto Spagnolini. "Cooperative Fading Regions for Decode and Forward Relaying." IEEE Transactions on Information Theory 54, no. 11 (November 2008): 4908–24. http://dx.doi.org/10.1109/tit.2008.929911.

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4

Song, Xin, MingLei Zhang, WenMIn Liu, and ShengBao Wang. "Threshold-based hybrid relay selection and power allocation scheme." Journal of Communications Technology, Electronics and Computer Science 8 (November 7, 2016): 16. http://dx.doi.org/10.22385/jctecs.v8i0.126.

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Abstract—To minimize total transmit power in a system while guaranteeing the outage probability at the same time in a cooperative system, we propose and analyse two threshold-based hybrid relay selection and power allocation schemes for a three-node cooperative relaying system. They are designated as: the hybrid amplify-direct-forward relaying (HADF) and incremental hybrid decode-direct-forward relaying (IHDDF) schemes. In the HADF scheme, a specific outage probability threshold is derived to determine that the system chooses to optimize power allocation of its source and relay in amplify-and-forward (AF) mode or optimize the power of its source in direct-transmit (DT) mode without a relay. In IHDDF, according to the outage probability threshold, the system chooses to optimize its power in turn with incremental decode-and-forward opportunistic relaying (IDFO) mode or DT mode. Closed-form expressions of the total transmit power of the proposed HADF and IHDDF schemes are derived. The proposed schemes have low computational complexity and system cost. Theoretical analysis and simulation results show that the HADF scheme outperforms the AF and DT schemes, and the total transmission power of the IHDDF scheme is reduced significantly compared with the IDFO and DT schemes. Compared with the HADF scheme, the IHDDF scheme has a better total transmit power in special channel condition.Keywords—power allocation, three-node cooperative relaying system, amplify-and-forward, incremental decode-and-forward opportunistic relaying.

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5

Yang Han, A. Pandharipande, and See Ting. "Cooperative decode-and-forward relaying for secondary spectrum access." IEEE Transactions on Wireless Communications 8, no. 10 (October 2009): 4945–50. http://dx.doi.org/10.1109/twc.2009.081484.

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6

Lee, Sangkook, Weifeng Su, Stella Batalama, and John D. Matyjas. "Cooperative Decode-and-Forward ARQ Relaying: Performance Analysis and Power Optimization." IEEE Transactions on Wireless Communications 9, no. 8 (August 2010): 2632–42. http://dx.doi.org/10.1109/twc.2010.062310.091554.

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7

Al-Mistarihi, Mamoun F., Rami Mohaisen, and Khalid A. Darabkh. "Performance evaluation of decode and forward cooperative diversity systems over nakagami-m fading channels with non-identical interferers." International Journal of Electrical and Computer Engineering (IJECE) 10, no. 5 (October 1, 2020): 5316. http://dx.doi.org/10.11591/ijece.v10i5.pp5316-5328.

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The deficiencies of regular cooperative relaying schemes were the main reason behind the development of Incremental Relaying (IR). Fixed relaying is one of the regular cooperative relaying schemes and it relies on using the relay node to help in transmitting the signal of the source towards the destination despite the channel’s condition. However, adaptive relaying methods allocate the channel resources efficiently; thus, such methods have drawn the attention of researchers in recent years. In this study, we analyze a two-hop Decode-and-Forward (DF) IR system’s performance via Nakagami-m fading channels with the existence of the several L distinguishable interferers placed close to the destination which diminishes the overall performance of the system due to the co-channel interference. Tight formulas for the Bit Error Rate (BER) and the Outage Probability (OP) are drawn. The assumptions are consolidated by numerical calculations.

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8

Liu, Hongwu, Zhiguo Ding, Kyeong Jin Kim, Kyung Sup Kwak, and H. Vincent Poor. "Decode-and-Forward Relaying for Cooperative NOMA Systems With Direct Links." IEEE Transactions on Wireless Communications 17, no. 12 (December 2018): 8077–93. http://dx.doi.org/10.1109/twc.2018.2873999.

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9

Ahmad, Ishtiaq, Khoa D. Nguyen, Nick Letzepis, and Andre Pollok. "On the Hopping Loss in MIMO Decode-and-Forward Cooperative Relaying." IEEE Transactions on Communications 66, no. 1 (January 2018): 54–63. http://dx.doi.org/10.1109/tcomm.2017.2756042.

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10

Zhao, Dawei, Honglin Zhao, Min Jia, and Wei Xiang. "Smart Relaying for Selection Combining Based Decode-and-Forward Cooperative Networks." IEEE Communications Letters 18, no. 1 (January 2014): 74–77. http://dx.doi.org/10.1109/lcomm.2013.112513.132216.

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11

Feteiha, Mohamed, and Hossam S. Hassanein. "Decode-and-Forward cooperative vehicular relaying for LTE-A MIMO-downlink." Vehicular Communications 3 (January 2016): 12–20. http://dx.doi.org/10.1016/j.vehcom.2015.11.002.

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12

CAO, Jianfei, Zhangdui ZHONG, and Bo AI. "Cooperative Gain and Cooperative Region Aided Relay Selection for Decode-and-Forward Relaying Protocols." IEICE Transactions on Communications E96.B, no. 1 (2013): 190–200. http://dx.doi.org/10.1587/transcom.e96.b.190.

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13

Lee, Jong-Ho. "Cooperative Relaying Protocol for Improving Physical Layer Security in Wireless Decode-and-Forward Relaying Networks." Wireless Personal Communications 83, no. 4 (April 17, 2015): 3033–44. http://dx.doi.org/10.1007/s11277-015-2580-2.

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14

Gao, He, Jun Li, Fu Qiang Zhou, Rong Zou, and Yi Cui. "Outage Probability Analysis and Adaptive Power Allocation for ISDF MIMO Cooperation Systems." Applied Mechanics and Materials 58-60 (June 2011): 2296–302. http://dx.doi.org/10.4028/www.scientific.net/amm.58-60.2296.

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The outage probability performance is analyzed for the optimization of incremental selection decode-amplify-forward (ISDF) multi-node MIMO cooperative communication systems. Firstly, the system model for the proposed multi-node MIMO cooperative protocol. Then, the incremental selection decode-amplify-forward and optimal relay selection strategy (routing) based on the opportunistic relaying scheme is proposed. The mutual information and outage probability between source and destination nodes for the proposed scheme are formulated with the relays have the capability of maximum ratio combining (MRC) receiving and beam-forming transmitting capabilities. Finally, adaptive strategy is proposed for adaptive optimal power allocation (APA). Theoretical analysis and simulation results show that the proposed APA outperforms traditional equal power allocation (EPA) in outage performance.

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15

Tran Tin, Phu, Phan Van-Duc, Tan N. Nguyen, and Le Anh Vu. "Performance Analysis in the Decode-and-Forward Full-Duplex Relaying Network with SWIPT." Scientific World Journal 2021 (April 16, 2021): 1–8. http://dx.doi.org/10.1155/2021/5548802.

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This paper investigates the decode-and-forward (DF) full-duplex (FD) cooperative relaying system with SWIPT. Specifically, the relay node can harvest energy from the source’s RF signal, and then the harvested energy is used for transferring information to the destination. Besides, we consider both direct and two-hop relaying links to transmit data from the source to the destination. In the performance analysis, we derive the exact expressions for outage probability (OP) by applying the receiver’s selection combining (SC) technique. Then, the Monte Carlo simulation is performed to verify the correctness of the mathematical analysis. Finally, the simulations show that the mathematic expressions match simulation results, which authenticates the mathematical analysis.

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16

Sharma, Shubha, A. S. Madhukumar, and Swaminathan R. "Switching-Based Cooperative Decode-and-Forward Relaying for Hybrid FSO/RF Networks." Journal of Optical Communications and Networking 11, no. 6 (May 7, 2019): 267. http://dx.doi.org/10.1364/jocn.11.000267.

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17

Khormuji, Majid Nasiri, and Erik G. Larsson. "Cooperative transmission based on decode-and-forward relaying with partial repetition coding." IEEE Transactions on Wireless Communications 8, no. 4 (April 2009): 1716–25. http://dx.doi.org/10.1109/twc.2009.070674.

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18

Selvaraj, M. D., and Ranjan K. Mallik. "Scaled Selection Combining Based Cooperative Diversity System With Decode and Forward Relaying." IEEE Transactions on Vehicular Technology 59, no. 9 (November 2010): 4388–99. http://dx.doi.org/10.1109/tvt.2010.2065819.

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19

Boujemâa, Hatem. "Static hybrid amplify and forward (AF) and decode and forward (DF) relaying for cooperative systems." Physical Communication 4, no. 3 (September 2011): 196–205. http://dx.doi.org/10.1016/j.phycom.2011.05.001.

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20

Xu, Lingwei, Hao Zhang, and T. Aaron Gulliver. "Performance Analysis of SNR-Based HDAF M2M Cooperative Networks." Journal of Electrical and Computer Engineering 2015 (2015): 1–7. http://dx.doi.org/10.1155/2015/841937.

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The lower bound on outage probability (OP) of mobile-to-mobile (M2M) cooperative networks overN-Nakagami fading channels is derived for SNR-based hybrid decode-amplify-forward (HDAF) relaying. The OP performance under different conditions is evaluated through numerical simulation to verify the accuracy of the analysis. These results show that the fading coefficient, number of cascaded components, relative geometric gain, and power-allocation are important parameters that influence this performance.

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21

Ai, Yun, and Michael Cheffena. "On Multi-Hop Decode-and-Forward Cooperative Relaying for Industrial Wireless Sensor Networks." Sensors 17, no. 4 (March 28, 2017): 695. http://dx.doi.org/10.3390/s17040695.

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22

Dziri, Ali, Michel Terre, and Nidal Nasser. "Performance Analysis of Decode and Forward Cooperative Relaying over the Generalized-K Channel." Wireless Engineering and Technology 04, no. 02 (2013): 92–100. http://dx.doi.org/10.4236/wet.2013.42014.

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23

Yu, Hyungseok, In-Ho Lee, and Gordon L. Stuber. "Outage Probability of Decode-and-Forward Cooperative Relaying Systems with Co-Channel Interference." IEEE Transactions on Wireless Communications 11, no. 1 (January 2012): 266–74. http://dx.doi.org/10.1109/twc.2011.111211.110250.

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24

Fareed, Muhammad Mehboob, Murat Uysal, and Theodoros A. Tsiftsis. "Error-Rate Performance Analysis of Cooperative OFDMA System With Decode-and-Forward Relaying." IEEE Transactions on Vehicular Technology 63, no. 5 (June 2014): 2216–23. http://dx.doi.org/10.1109/tvt.2013.2290780.

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25

Boujemâa, H. "Bit error probability of cooperative MC-CDMA systems using decode and forward relaying." Transactions on Emerging Telecommunications Technologies 23, no. 1 (October 17, 2011): 25–35. http://dx.doi.org/10.1002/ett.1505.

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26

Wen, Shuhuan, Baozhu Hu, Ahmad B. Rad, Xinbin Li, Huibin Lu, and Jianhua Zhang. "Robust Nash Dynamic Game Strategy for User Cooperation Energy Efficiency in Wireless Cellular Networks." Mathematical Problems in Engineering 2012 (2012): 1–10. http://dx.doi.org/10.1155/2012/636159.

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Recently, there is an emerging trend of addressing “energy efficiency” aspect of wireless communications. It has been shown that cooperating users relay each other's information to improve data rates. The energy is limited in the wireless cellular network, but the mobile users refuse to relay. This paper presents an approach that encourages user cooperation in order to improve the energy efficiency. The game theory is an efficient method to solve such conflicts. We present a cellular framework in which two mobile users, who desire to communicate with a common base station, may cooperate via decode-and-forward relaying. In the case of imperfect information assumption, cooperative Nash dynamic game is used between the two users' cooperation to tackle the decision making problems: whether to cooperate and how to cooperate in wireless networks. The scheme based on “cooperative game theory” can achieve general pareto-optimal performance for cooperative games, and thus, maximize the entire system payoff while maintaining fairness.

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27

Gong, Xianli, Xinwei Yue, and Feng Liu. "Performance Analysis of Cooperative NOMA Networks with Imperfect CSI over Nakagami-m Fading Channels." Sensors 20, no. 2 (January 11, 2020): 424. http://dx.doi.org/10.3390/s20020424.

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In this paper, we investigate a downlink cooperative non-orthogonal multiple access (NOMA) network with decode-and-forward relaying, where two scenarios of user relaying with direct link and user relaying without direct link are discussed in detail. More particularly, the performance of cooperative NOMA system under the assumption of imperfect channel state information (ipCSI) is studied over Nakagami-m fading channels. To evaluate the outage performance of the above discussed two scenarios, the closed-form expressions of outage probability for a pair of users are derived carefully. The diversity orders of users are achieved in the high signal-to-noise region. An error floor appears in the outage probability owing to the existence of channel estimation errors under ipCSI conditions. Simulation results verify the validity of our analysis and show that: (1) NOMA is superior to conventional orthogonal multiple access; (2) The best user relaying location for cooperative NOMA networks should be near to the base station; and (3) The outage performance of distant user with direct link significantly outperforms distant user without direct link by comparing the two scenarios.

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28

Wang, Dawei, Pinyi Ren, Qinghe Du, Li Sun, and Yichen Wang. "Downlink and Uplink Cooperative Transmission for Primary Secrecy Based Cognitive Radio Sensor Networks." International Journal of Distributed Sensor Networks 2015 (2015): 1–14. http://dx.doi.org/10.1155/2015/152851.

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Aiming at allocating more licensed spectrum to wireless sensor nodes (SNs) under the constraint of the information security requirement of the primary system, in this paper, we propose a cooperative relaying and jamming secure transmission (CRJS) scheme in which SNs will relay primary message and jam primary eavesdrop concurrently with SN’s downlink and uplink information transmission in cognitive radio sensor networks (CRSNs). In our proposed CRJS scheme, SNs take advantages of physical layer secure technologies to protect the primary transmission and acquire some interference-free licensed spectrum as a reward. In addition, both decode-and-forward (DF) and amplify-and-forward (AF) relaying protocols are investigated in our proposed CRJS scheme. Our object is to maximize the transmission rate of SNs by optimal allocating of the relaying power, jamming power, and downlink and uplink transmit power under the target secure transmission rate requirement of the primary system. Moreover, two suboptimal algorithms are proposed to deal with these optimization problems. Furthermore, we analyze the transmission rate of SNs and allocate the relaying power, jamming power, and downlink and uplink transmit power for the asymptotic scenarios. Simulation results demonstrate the performance superiority of our developed strategy over conventional jamming scheme in terms of the transmission rate of WSN.

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29

Amjad, Tariq Muhamad, and Elsheikh Mohamed Ahmed Elsheikh. "Positioning of a Wireless Relay Node for Useful Cooperative Communication." Indonesian Journal of Electrical Engineering and Computer Science 10, no. 3 (June 1, 2018): 959. http://dx.doi.org/10.11591/ijeecs.v10.i3.pp959-965.

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<span>Given the exorbitant amount of data transmitted and the increasing demand for data connectivity in the 21st century, it has become imperative to search for pro-active and sustainable solutions to the effectively alleviate the overwhelming burden imposed on wireless networks. In this study a Decode and Forward cooperative relay channel is analyzed, with the employment of Maximal Ratio Combining at the destination node as the method of offering diversity combining. The system framework used is based on a three-node relay channel with a source node, relay node and a destination node. A model for the wireless communications channel is formulated in order for simulation to be carried out to investigate the impact on performance of relaying on a node placed at the edge of cell. Firstly, an AWGN channel is used before the effect of Rayleigh fading is taken into consideration. Result shows that performance of cooperative relaying performance is always superior or similar to conventional relaying. Additionally, relaying is beneficial when the relay is placed closer to the receiver. </span>

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30

Patil, Rajendrakumar. "On Throughput Performance of Decode and Forward Cooperative Relaying With Packet Combining and ARQ." International journal of Computer Networks & Communications 4, no. 3 (May 31, 2012): 57–68. http://dx.doi.org/10.5121/ijcnc.2012.4304.

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31

Cao, Ning, Yuchang Ye, and Minghe Mao. "The Effect of Misdetection Probability on the Performance of Cooperative-Relaying-Based Cognitive Radio Systems." Mobile Information Systems 2016 (2016): 1–10. http://dx.doi.org/10.1155/2016/1051632.

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Cognitive radio (CR) is a promising solution to address the more and more congested radio spectrum. Cooperative relaying can provide a better transmission performance for the secondary user (SU), while the performance of the primary user (PU, also named licensed user) should be preferentially protected especially when there is misdetection probability. In this paper, in order to keep the PU away from outage caused by the interference from the SU under a certain signal-to-noise ratio (SNR), the maximum SNR for the SU can be derived by using the rate decaying factor (RDF). Then, based on the maximum channel gain and the maximum SNR, the outage probability is analyzed using decode-and-forward (DF) relaying and amplify-and-forward (AF) relaying schemes. Numerical results show that the outage probability decreases when the power allocation factor increases for DF strategy, while the outage probability has error floor when the power allocation factor increases for AF strategy. And the relaying scheme based on the maximum channel gain outperforms that based on the maximum SNR when the power allocation factor and detection probability are small, while the relaying scheme based on the maximum SNR outperforms that based on the maximum channel gain when the power allocation factor is large. What is more, AF relaying has better outage performance in the practical implementation.

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32

Xu, Lingwei, Hao Zhang, and Jingjing Wang. "Joint TAS and Power Allocation for SDF Relaying M2M Cooperative Networks." Mathematical Problems in Engineering 2016 (2016): 1–6. http://dx.doi.org/10.1155/2016/9187438.

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The outage probability (OP) performance of multiple-relay-based selective decode-and-forward (SDF) relaying mobile-to-mobile (M2M) networks with transmit antenna selection (TAS) overN-Nakagami fading channels is investigated. The exact closed-form expressions for OP of the optimal and suboptimal TAS schemes are derived. The power allocation problem is formulated for performance optimization. Then, the OP performance under different conditions is evaluated through numerical simulations to verify the analysis. The simulation results showed that optimal TAS scheme has a better OP performance than suboptimal TAS scheme. Further, the power allocation parameter has an important influence on the OP performance.

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33

Wang, Zih-Sin, Liang-Hung Lin, Jyh-Horng Wen, Yen-Ju Lin, and Chien-Erh Weng. "Performance Analysis of AF Cooperative Relaying Networks with SWIPT." Electronics 11, no. 4 (February 15, 2022): 589. http://dx.doi.org/10.3390/electronics11040589.

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Cooperative communication networks have received more attention due to its ability to improve the signal quality of terminal devices by spatial diversity. Under recent advance in internet of things, In order to extend the service life of terminal devices powered by battery, simultaneous wireless information and power transfer (SWIPT) technique has been emphasize. The terminal devices can harvest energy and decode information from the same radio frequency (RF) signal using by SWIPT technique. In this paper, we combine both techniques to study the performance of both conventional cooperative relaying networks without SWIPT and cooperative relaying networks with SWIPT under an amplify-and-forward (AF) relaying network. To the best of our knowledge, no one simultaneously studies and compares the performance of both systems. Therefore, the outage probabilities of both systems are carried out, and numerical results are compared in this paper. The main results include: (1) Compared with conventional cooperative communication, the cooperative communication with SWIPT has better outage probability only when the distance between relay node and source node is less than one. It implies that, to outperform the conventional cooperative communication, the relay node should harvest enough energy for signal transmission. (2) With the diversity of direct path and relay path, the outage probability of cooperative communication with EH under an AF relaying network has been significantly reduced.

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34

Nguyen, Tien-Tung, Jong-Ho Lee, Minh-Tuan Nguyen, and Yong-Hwa Kim. "Machine Learning-Based Relay Selection for Secure Transmission in Multi-Hop DF Relay Networks." Electronics 8, no. 9 (August 28, 2019): 949. http://dx.doi.org/10.3390/electronics8090949.

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A relay selection method is proposed for physical-layer security in multi-hop decode-and-forward (DF) relaying systems. In the proposed method, cooperative relays are selected to maximize the achievable secrecy rates under DF-relaying constraints by the classification method. Artificial neural networks (ANNs), which are used for machine learning, are applied to classify the set of cooperative relays based on the channel state information of all nodes. Simulation results show that the proposed method can achieve near-optimal performance for an exhaustive search method for all combinations of relay selection, while computation time are reduced significantly. Furthermore, the proposed method outperforms the best relay selection method, in which the best relay in terms of secrecy performance is selected among active ones.

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35

Sugiura, Shinya, Sheng Chen, Harald Haas, Peter M. Grant, and Lajos Hanzo. "Coherent Versus Non-Coherent Decode-and-Forward Relaying Aided Cooperative Space-Time Shift Keying." IEEE Transactions on Communications 59, no. 6 (June 2011): 1707–19. http://dx.doi.org/10.1109/tcomm.2011.042111.100536.

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36

Hwang, Kyu-Sung, Young-Chai Ko, and Mohamed-Slim Alouini. "Outage probability of cooperative diversity systems with opportunistic relaying based on decode-and-forward." IEEE Transactions on Wireless Communications 7, no. 12 (December 2008): 5100–5107. http://dx.doi.org/10.1109/t-wc.2008.071216.

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37

Lv, Linshu, Qi Zhu, and Guangjun Liang. "Distributed Resource Allocation for Multi-cell Cooperative OFDMA Networks with Decode-and-Forward Relaying." Wireless Personal Communications 89, no. 4 (April 22, 2016): 1355–70. http://dx.doi.org/10.1007/s11277-016-3324-7.

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38

Sharma, Prabhat Kumar, and Parul Garg. "Performance analysis of full duplex decode-and-forward cooperative relaying over Nakagami-mfading channels." Transactions on Emerging Telecommunications Technologies 25, no. 9 (October 18, 2013): 905–13. http://dx.doi.org/10.1002/ett.2720.

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39

Wang, Zhenling, Zhangyou Peng, Yongsheng Pei, and Haojia Wang. "Performance Analysis of Cooperative NOMA Systems with Incremental Relaying." Wireless Communications and Mobile Computing 2020 (March 14, 2020): 1–15. http://dx.doi.org/10.1155/2020/4915638.

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In this paper, we investigate the performance of the non-orthogonal multiple access (NOMA) system with incremental relaying, where the relay is employed with amplify-and-forward (AF) or decode-and-forward (DF) protocols. To characterize the outage behaviors of the incremental cooperative NOMA (ICN) system, new closed-form expressions of both exact and asymptotic outage probability for two users are derived. In addition, the performance of the conventional cooperative NOMA (CCN) system is analyzed as a benchmark for the the purpose of comparison. We confirm that the outage performance of the distant user is enhanced when ICN system is employed. Numerical results are presented to demonstrate that (1) the near user of the ICN system achieves better outage behavior than that of the CCN system in the low signal-to-noise ratio (SNR) region; (2) the outage performance of distant user for the DF-based ICN system is superior to that of the AF-based ICN system when the system works in cooperative NOMA transmission mode; and (3) in the low SNR, the throughput of the ICN system is higher than that of the CCN system.

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40

Tin, Phu Tran, Phan Van-Duc, Tan N. Nguyen, and Le Anh Vu. "Performance Analysis for Exact and Upper Bound Capacity in DF Energy Harvesting Full-Duplex with Hybrid TPSR Protocol." Journal of Electrical and Computer Engineering 2021 (January 27, 2021): 1–9. http://dx.doi.org/10.1155/2021/6610107.

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In this paper, we investigate the full-duplex (FD) decode-and-forward (DF) cooperative relaying system, whereas the relay node can harvest energy from radiofrequency (RF) signals of the source and then utilize the harvested energy to transfer the information to the destination. Specifically, a hybrid time-power switching-based relaying method is adopted, which leverages the benefits of time-switching relaying (TSR) and power-splitting relaying (PSR) protocols. While energy harvesting (EH) helps to reduce the limited energy at the relay, full-duplex is one of the most important techniques to enhance the spectrum efficiency by its capacity of transmitting and receiving signals simultaneously. Based on the proposed system model, the performance of the proposed relaying system in terms of the ergodic capacity (EC) is analyzed. Specifically, we derive the exact closed form for upper bound EC by applying some special function mathematics. Then, the Monte Carlo simulations are performed to validate the mathematical analysis and numerical results.

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41

Nguyen, Tuan Nhu. "Decode-and-Forward vs. Amplify-and-Forward Scheme in Physical Layer Security for Wireless Relay Beamforming Networks." Journal of Science and Technology on Information security 10, no. 2 (April 9, 2020): 9–17. http://dx.doi.org/10.54654/isj.v10i2.66.

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Abstract— To secure communication from the sender to the receiver in wireless networks, cryptographic algorithms are usually used to encrypt data at the upper layers of a multi-tiered transmission model. Another emerging trend in the security of data transmitted over wireless networks is the physical layer security based on beamforming and interference fading communication technology and not using cryptographic algorithms. This trend has attracted increasing concerns from both academia and industry. This paper addresses how physical layer security can protect secret data compare with the traditional cryptographic encryption and which is the better cooperative relaying scheme with the state of the art approached methods in wireless relaying beamforming network.Tóm tắt— Việc bảo mật truyền thông vô tuyến từ nơi gửi đến nơi nhận thường sử dụng các thuật toán mật mã để mã hoá dữ liệu tại các tầng phía trên trong mô hình phân lớp. Một xu hướng khác đang được quan tâm rộng rãi là bảo mật tầng vật lý dựa trên kỹ thuật truyền tin beamforming và kỹ thuật tương tác fading kênh chủ động. Xu hướng này hiện đang được thu hút cả trong giới công nghiệp và nghiên cứu. Đóng góp của bài báo này là làm rõ khả năng bảo mật tầng vật lý và so sách chúng với phương pháp bảo mật dùng kỹ thuật mật mã truyền thống. Bài báo cũng so sánh hai kỹ thuật chuyển tiếp được sử dụng chính trong bảo mật tầng vật lý cho mạng vô tuyến chuyển tiếp là Amplify-and-Forward và Decode-and-Forward.

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Chaoudhry, Bushra Bashir, Syed Ali Hassan, Joachim Speidel, and Haejoon Jung. "Energy Efficiency of a Decode-and-Forward Multiple-Relay Network with Rate Adaptive LDPC Codes." Sensors 19, no. 21 (November 4, 2019): 4793. http://dx.doi.org/10.3390/s19214793.

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This paper presents cooperative transmission (CT), where multiple relays are used to achieve array and diversity gains, as an enabling technology for Internet of Things (IoT) networks with hardware-limited devices. We investigate a channel coding aided decode-and-forward (DF) relaying network, considering a two-hop multiple-relay network, where the data transmission between the source and the destination is realized with the help of DF relays. Low density parity check (LDPC) codes are adopted as forward error correction (FEC) codes to encode and decode the data both at the source and relays. We consider both fixed and variable code rates depending upon the quality-of-service (QoS) provisioning such as spectral efficiency and maximum energy efficiency. Furthermore, an optimal power allocation scheme is studied for the cooperative system under the energy efficiency constraint. We present the simulation results of our proposed scheme, compared with conventional methods, which show that if decoupled code rates are used on both hops then a trade-off has to be maintained between system complexity, transmission delay, and bit error rate (BER).

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Naeem, Muhammad, Muhammad Jaseemuddin, Alagan Anpalagan, Ashok Karmokar, and Kandasamy Illanko. "Decode and forward relaying for energy-efficient multiuser cooperative cognitive radio network with outage constraints." IET Communications 8, no. 5 (March 27, 2014): 578–86. http://dx.doi.org/10.1049/iet-com.2013.0119.

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Yu, Tsang-Wei, Wern-Ho Sheen, and Chung-Hsuan Wang. "Power Allocation for Cooperative Bit-Interleaved Coded Modulation Systems with Decode-Remap-and-Forward Relaying." IEEE Transactions on Wireless Communications 11, no. 5 (May 2012): 1712–21. http://dx.doi.org/10.1109/twc.2012.031212.110309.

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Yu, Hyungseok, and Gordon L. Stuber. "General Decode-and-Forward Cooperative Relaying with Co-Channel Interference in Shadowed Nakagami Fading Channels." IEEE Transactions on Wireless Communications 11, no. 12 (December 2012): 4318–27. http://dx.doi.org/10.1109/twc.2012.101712.111578.

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Vashistha, Ankush, Shubha Sharma, and Vivek Ashok Bohara. "Outage Analysis of a Multiple-Antenna Cognitive Radio System With Cooperative Decode-and-Forward Relaying." IEEE Wireless Communications Letters 4, no. 2 (April 2015): 125–28. http://dx.doi.org/10.1109/lwc.2014.2382587.

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Zhang, Peichang, Sheng Chen, and Lajos Hanzo. "Differential Space–Time Shift Keying-Aided Successive-Relaying-Assisted Decode-and-Forward Cooperative Multiuser CDMA." IEEE Transactions on Vehicular Technology 62, no. 5 (June 2013): 2156–69. http://dx.doi.org/10.1109/tvt.2013.2239673.

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Kadir, Mohammad Ismat, Li Li, Sheng Chen, and Lajos Hanzo. "Successive-Relaying-Aided Decode-and-Forward Coherent Versus Noncoherent Cooperative Multicarrier Space–Time Shift Keying." IEEE Transactions on Vehicular Technology 62, no. 6 (July 2013): 2544–57. http://dx.doi.org/10.1109/tvt.2013.2246800.

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Khodakhah, Farnaz, Aamir Mahmood, Patrik Österberg, and Mikael Gidlund. "Multiple Access-Enabled Relaying with Piece-Wise and Forward NOMA: Rate Optimization under Reliability Constraints." Sensors 21, no. 14 (July 13, 2021): 4783. http://dx.doi.org/10.3390/s21144783.

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The increasing proliferation of Internet-of-things (IoT) networks in a given space requires exploring various communication solutions (e.g., cooperative relaying, non-orthogonal multiple access, spectrum sharing) jointly to increase the performance of coexisting IoT systems. However, the design complexity of such a system increases, especially under the constraints of performance targets. In this respect, this paper studies multiple-access enabled relaying by a lower-priority secondary system, which cooperatively relays the incoming information to the primary users and simultaneously transmits its own data. We consider that the direct link between the primary transmitter–receiver pair uses orthogonal multiple access in the first phase. In the second phase, a secondary transmitter adopts a relaying strategy to support the direct link while it uses non-orthogonal multiple access (NOMA) to serve the secondary receiver. As a relaying scheme, we propose a piece-wise and forward (PF) relay protocol, which, depending on the absolute value of the received primary signal, acts similar to decode-and-forward (DF) and amplify-and-forward (AF) schemes in high and low signal-to-noise ratio (SNR), respectively. By doing so, PF achieves the best of these two relaying protocols using the adaptive threshold according to the transmitter-relay channel condition. Under PF-NOMA, first, we find the achievable rate region for primary and secondary receivers, and then we formulate an optimization problem to derive the optimal PF-NOMA time and power fraction that maximize the secondary rate subject to reliability constraints on both the primary and the secondary links. Our simulation results and analysis show that the PF-NOMA outperforms DF-NOMA and AF-NOMA-based relaying techniques in terms of achievable rate regions and rate-guaranteed relay locations.

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Ghourab, Esraa M., Mohamed Azab, Mohamed F. Feteiha, and Hesham El-Sayed. "A Novel Approach to Enhance the Physical Layer Channel Security of Wireless Cooperative Vehicular Communication Using Decode-and-Forward Best Relaying Selection." Wireless Communications and Mobile Computing 2018 (May 28, 2018): 1–15. http://dx.doi.org/10.1155/2018/9624856.

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This paper proposes a novel approach to enhance wireless vehicle-to-vehicle channel-secrecy capacity by imposing signal transmission diversity. This work exploits cooperative vehicular relaying to extract the associated underlying multipath and Doppler diversity using precoding techniques. We evaluated the capacity and diversity gain for the presented approach to ensure its effectiveness and efficiency. The abundance of moving vehicles, operating in an ad hoc fashion, can eliminate the need to establish a dedicated relaying infrastructure. A relay selection scheme is deployed, taking advantage of the potentially large number of available relaying vehicles. Further, we derivate a closed-form mathematical expression for the channel-secrecy capacity, diversity order gain, and the intercept probability. We used the direct transmission scenario as a reference to assess our analysis. Our analytical and simulation results for the presented model showed that channel-secrecy capacity and performance-indicators improved significantly.

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