Results 271 to 280 of about 147,537 (296)

Cooperative Phase Sweep Amplify-and-Forward Transmission

2008 IEEE 68th Vehicular Technology Conference, 2008
This work presents a new amplify-and-forward (AF) cooperative multiple input multiple output (MIMO) transmission scheme based on phase sweep transmit diversity. In a single hop cooperative link, the relay node imposes a phase sweep on the signal it receives from the source node.
Geoffrey G. Messier, Sebastian Magierowski, Jean-Francois Bousquet   +2 more
openaire   +2 more sources

On the Error Exponent of Amplify and Forward Relay Networks

IEEE Communications Letters, 2011
In this letter we derive the exact random coding error exponent of a dual hop amplify and forward (AF) relay network with channel state information (CSI) assisted ideal relay gain. Numerical results have been presented, which provide insight about the performance tradeoff between the error exponent and the data rate of the network.
Bappi Barua, Mehran Abolhasan, Farzad Safaei, Daniel Robert Franklin   +3 more
openaire   +2 more sources

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.
Li Chen 0013, Rolando A. Carrasco, Stéphane Y. Le Goff, Ian J. Wassell   +3 more
openaire   +1 more source

Relay-Aided Amplify-and-Forward Powerline Communications

IEEE Transactions on Smart Grid, 2013
Powerline communications (PLC) is a favorable technique for many smart grid applications. By transmitting information over the existing powerline infrastructure, PLC has the benefit of low deployment cost. However, due to low transmit power, limited bandwidth, and harsh channel conditions, reliable long-distance and high-capacity PLC is challenging ...
Xilin Cheng, Rui Cao, Liuqing Yang 0001
openaire   +1 more source

Linear detection for the nonorthogonal amplify and forward protocol

IEEE Transactions on Wireless Communications, 2009
In this paper, we present three new detection schemes for the nonorthogonal amplify and forward (NAF) protocol in a cooperative diversity system based on a multiuser detection approach, namely, a channel inversion type detector, a maximal-ratio combining (MRC) type detector, and a biased maximum likelihood (ML) detector. The decision variables in these
Aakanksha Chowdhery, Ranjan K. Mallik
openaire   +2 more sources

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   +3 more sources

Linear theory of multistage forward-wave amplifiers

Physical Review E, 1999
A small-signal theory describing multistage gyro-traveling-wave tubes (gyro-TWTs) is developed. Multistage configurations of gyro-TWTs as well as conventional TWTs seem to be attractive because of their principal ability to operate stably with a high gain, since the stability can be provided by a shortening of each stage while the gain increases with ...
G S, Nusinovich, M, Walter
openaire   +2 more sources

On the Outage Probability in Amplify-and-Forward Relay Channels

2009 IEEE Wireless Communications and Networking Conference, 2009
The overall relay channel from the source to the destination via relays has temporal properties quite different from any cellular channel. This work presents a study for time-dependent performance of relay channels for both fast-fading and log-normal shadow fading in terms of average outage duration, frequency of outage and probability of outage ...
Dorra Ben Cheikh Battikh, Ahmed Saadani
openaire   +2 more sources

Robust recursive filtering for uncertain stochastic systems with amplify-and-forward relays

International Journal of Systems Science, 2020
Hongjian Liu, Kaixiang Peng, Bo Shen
exaly  

Static hybrid amplify and forward (AF) and decode and forward (DF) relaying for cooperative systems

Physical Communication, 2011
Hatem Boujemaâ
exaly