Results 21 to 30 of about 134,511 (264)
Performance Comparison of Relay-Based Covert Communications: DF, CF and AF
Sensors, 2023 In this paper, we investigate the performance of covert communications in different types of a relay system: decode-and-forward (DF), compress-and-forward (CF) and amplify-and-forward (AF).
Jihwan Moon
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Amplified Hopf Bifurcations in Feed-Forward Networks [PDF]
SIAM Journal on Applied Dynamical Systems, 2013 In a previous paper, the authors developed a method for computing normal forms of dynamical systems with a coupled cell network structure. We now apply this theory to one-parameter families of homogeneous feed-forward chains with 2-dimensional cells. Our main result is that Hopf bifurcations in such families generically generate branches of periodic ...
Bob W. Rink, Jan A. Sanders
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Grassmannian beamforming for MIMO amplify-and-forward relaying [PDF]
IEEE Journal on Selected Areas in Communications, 2008 In this paper, we derive the optimal transmitter/ receiver beamforming vectors and relay weighting matrix for the multiple-input multiple-output amplify-and-forward relay channel. The analysis is accomplished in two steps. In the first step, the direct link between the transmitter (Tx) and receiver (Rx) is ignored and we show that the transmitter and ...
Behrouz Khoshnevis +2 more
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Cooperative Spectrum Sensing Schemes with the Interference Constraint in Cognitive Radio Networks
Sensors, 2014 In this paper, we propose cooperative spectrum sensing schemes, called decode-and-forward cooperative spectrum sensing (DF-CSS) scheme and amplify-and-forward cooperative spectrum sensing (AF-CSS) scheme, in cognitive radio networks.
Tri-Nhu Do, Beongku An
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IEEE Photonics Journal, 2022 The scheme of combining relay and optical code division multiple access (OCDMA) is one of the effective methods to improve the reliability and security of free space optical (FSO) communication system.
Jianhua Ji +4 more
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An Efficient Partner Selection Method to Overcome the Interference Effect in Wireless Networks
IEEE Access, 2019 In this paper, through a mathematical analysis of the overall links capacity equation, we present an efficient partner selection criterion in a cooperative communication scheme with a time-varying fading channel and severe interference on the cooperative
Jamal A. Hassan, Samah A. Mustafa
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Energy Efficiency Analysis in Amplify-And-Forward and Decode-And-Forward Cooperative Networks [PDF]
2010 IEEE Wireless Communication and Networking Conference, 2010 In this paper, we have studied the energy efficiency of cooperative networks operating in either the fixed Amplifyand- Forward (AF) or the selective Decode-and-Forward (DF) mode. We consider the optimization of the M-ary quadrature amplitude modulation (MQAM) constellation size to minimize the bit energy consumption under given bit error rate (BER ...
Qing Chen 0003, Mustafa Cenk Gursoy
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Coding for the Non-Orthogonal Amplify-and-Forward Cooperative Channel [PDF]
2007 IEEE Information Theory Workshop, 2007 25 pages, 10 figures, submitted to IEEE Transactions on Information ...
Ghassan M. Kraidy +2 more
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Energies, 2019 The exact performance of amplify-and-forward (AF) bidirectional relay systems is studied in generalized and versatile Nakagami-m fading channels, where the parameter m is an arbitrary positive number.
Dong Qin, Yuhao Wang, Tianqing Zhou
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IEEE Access, 2022 Dual-hop relay communication systems have received extensive research attention due to their property of improving system reliability, spectral and power efficiency.
Daljeet Singh +4 more
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