Results 271 to 280 of about 159,814 (309)

Analog Full-Duplex Amplify-and-Forward Relay for Power Line Communication Networks

IEEE Communications Letters, 2019
Signal relays in power line communication networks are usually implemented using the decode-and-forward protocol, which requires complex relays. In this letter, we propose a real-time amplify-and-forward relay that is mainly based on an analog full ...
Federico Passerini, A. Tonello
semanticscholar   +1 more source

Robust Power Allocation for Amplify-and-Forward Relay Networks

2007 IEEE International Conference on Communications, 2007
Relay power allocation has been shown to provide substantial performance gain in wireless relay networks when perfect global channel state information (CSI) is available. In this paper, we consider a more realistic scenario, where such global CSI is subject to uncertainty, and we aim to design robust power allocation protocols for both the coherent and
T. Q. S. Quek, H. Shin, M. Z. Win, CHIANI, MARCO   +3 more
openaire   +2 more sources

Outage Probability and Optimal Cache Placement for Multiple Amplify-and-Forward Relay Networks

IEEE Transactions on Vehicular Technology, 2018
We present a novel framework for analyzing and optimizing the outage performance of a multiple amplify-and-forward relay network, where $N$ relays, each with finite cache capacity, are deployed to assist the transmission from a base station equipped with
Lisheng Fan, Nan Zhao, Xianfu Lei, Qingchun Chen, Nan Yang, G. Karagiannidis   +5 more
semanticscholar   +1 more source

Energy Efficiency of Amplify-and-Forward Full-Duplex Relay Channels

IEEE Wireless Communications Letters, 2019
In this letter, the energy efficiency (EE) for a three-node full-duplex (FD) relay channel with the amplify-and-forward (AF) scheme is studied. In particular, both the residual self-interference (RSI) and the circuit power consumption for imperfect self ...
Jianhui Ma, Chuan Huang, Shuguang Cui, Qiang Li   +3 more
semanticscholar   +1 more source

Amplify-and-forward with full-duplex relay selection

2012 IEEE International Conference on Communications (ICC), 2012
This paper focuses on the relay selection problem in amplify-and-forward (AF) cooperative communication with full-duplex (FD) operation. Different relay selection schemes assuming the availability of different instantaneous information are studied. We consider an optimal relay selection that maximizes the instantaneous FD channel capacity and requires ...
Krikidis, Ioannis A., Suraweera, H. A., Yuen, C., Krikidis, Ioannis A., Suraweera, H. A., Yuen, C.   +5 more
openaire   +2 more sources

Beamforming in Nonorthogonal Amplify-and-Forward Relay Networks

IEEE Transactions on Vehicular Technology, 2011
This paper considers wireless amplify-and-forward (AF) relay networks in which the source communicates with the relays and destination in the first phase and the relays simultaneously forward signals to the destination in the second phase over uncorrelated Rayleigh fading channels.
Tung T. Pham, Ha H. Nguyen, Hoang D. Tuan   +2 more
openaire   +1 more source

Multistage cooperative broadcast using amplify-and-forward relays

2010 - MILCOM 2010 MILITARY COMMUNICATIONS CONFERENCE, 2010
In this work we study the propagation of the signal in a cooperative network where a single source message is retransmitted by multiple stages (levels) of relays. Relays are assumed to have limited computational abilities and hence adopt the amplify-and-forward scheme.
Bhargava Yammanuru, Birsen Sirkeci-Mergen   +1 more
openaire   +1 more source

Cooperative Amplify-and-Forward with Trellis Coded Modulation

2009 IEEE Wireless Communications and Networking Conference, 2009
In a cooperative communication network, individual users are encouraged not only to transmit their own data, but also relay other user's data. This relaying transmission creates spatial diversity to combat the effect of individual severe fading and path loss.
L. Chen, R. A. Carrasco, S. LeGoff, I. J. Wassell   +3 more
openaire   +1 more source

Distributed Amplify-and-Forward with Ring-TCM Codes

2010 7th IEEE Consumer Communications and Networking Conference, 2010
This paper proposes a new distributed Amplify-and-Forward (AF) scheme which is integrated with the Ring-Trellis Coded Modulation (TCM) codes in order to achieve both high spectral efficiency and large diversity gain. In the distributed AF scheme, more users cooperate with each other.
Li Chen, Rolando Carrasco, Ian Wassell
openaire   +1 more source

Average approach to amplify-and-forward relay networks

2009 9th International Symposium on Communications and Information Technology, 2009
In this paper, the analysis of an average received signal-to-noise ratio (SNR) for a cooperative communication network with amplify-and-forward (AF) relays is presented. In AF systems, the overall instantaneous SNR at the receiving end can be expressed as the form of a harmonic mean of perhop SNRs.
Won-Chul Choi, Seokkwon Kim, Seung-Ri Jin, Dong-Jo Park   +3 more
openaire   +1 more source