Results 211 to 220 of about 11,394 (265)

Performance evaluation of a flexible amplify and forward (AF) combined with HARQ

21st Annual IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, 2010
A Hybrid ARQ (HARQ) scheme employing a flexible amplify and forward (AF) relaying is considered for a cooperative relay channel. Two phase types with flexible length: one phase for relay reception and another phase for relay forwarding are assumed to accommodate half duplex relaying.
M. S. Fazel Falavarjani, Reza Hoshyar, Rahim Tafazolli   +2 more
openaire   +2 more sources

Space-Time Codes for Amplify-and-Forward (AF) Relay Channels: Performance and Code Design

2011 IEEE Global Telecommunications Conference - GLOBECOM 2011, 2011
We consider the analysis and design of space-time trellis codes (STTCs) for a cooperative relay channel operating in amplify-and- forward (AF) mode assuming the source and destination nodes are equipped with multiple antennas but the relay node has single antenna.
Sajjad Beygi, Hamid-Reza Bahrami 0002, Tho Le-Ngoc   +2 more
openaire   +2 more sources

Precoder and Decoder Design for SNR Maximization in Amplify-and-Forward (AF) MIMO Relay Systems

2011 IEEE Vehicular Technology Conference (VTC Fall), 2011
We address the problem of designing linear precoder and decoder for single symbol transmission in three node amplify-and-forward (AF) multi-input-multi- output (MIMO) relay systems where all the nodes are equipped with multiple antennas and the source and the relay nodes are subject to individual transmit power constraints.
Ahmad Danaee, Hamid-Reza Bahrami 0002
openaire   +2 more sources

Precoder design and node power allocation in multi-antenna amplify-and-forward (AF) relay systems

2013 IEEE International Conference on Communications (ICC), 2013
In this paper, the problem of precoder design and node power allocation in a three node cooperative multiple-input multiple-output (MIMO) relay system is discussed. All the nodes are assumed to be equipped with multiple antennas and the source and the relay nodes are subject to a total transmit power constraint. We first introduce an upper bound on the
Ahmad Danaee, Hamid-Reza Bahrami 0002, Mehdi Sadeghzadeh   +2 more
openaire   +2 more sources

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

International Journal of Systems Science, 2020
This paper is concerned with the recursive filtering problem for a class of uncertain systems with amplify-and-forward (AF) relays. The parameter uncertainties are described by a set of norm-bounded matrices. An AF relay is located between the sensor and
Hongjian Liu, Kaixiang Peng, Bo Shen
exaly   +2 more sources

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

Physical Communication, 2011
Abstract In this paper, we propose a static hybrid amplify and forward (AF) and decode and forward (DF) relaying protocol for cooperative systems. In such a scheme, relays close to the source amplify the received signal whereas the remaining relays transmit only if they decode correctly.
Hatem Boujemaâ
exaly   +2 more sources

Automatic modulation classification over MIMO amplify and forward (AF)-relay fading channels

Physical Communication, 2021
Abstract Automatic Modulation Classification (AMC) plays an important role in many civilian applications such as spectrum monitoring (SM) and cognitive radio (CR). The majority of the AMC algorithms for MIMO systems are developed for rich scattering environments, which offer a full rank channel matrix.
Dibyajyoti Das, Prabin Kumar Bora, Ratnajit Bhattacharjee   +2 more
openaire   +1 more source

Optimized Distributed Filtering for Saturated Systems With Amplify-and-Forward Relays Over Sensor Networks: A Dynamic Event-Triggered Approach

IEEE Transactions on Neural Networks and Learning Systems, 2023
In this article, the optimized distributed filtering problem is studied for a class of saturated systems with amplify-and-forward (AF) relays via a dynamic event-triggered mechanism (DETM).
Jun Hu, Jiaxing Li, Huaicheng Yan, Hongjian Liu   +3 more
semanticscholar   +1 more source

Performance of a Joint PAPR Reduction Clipping and Filtering (CF) Scheme and Predistortion Techniques in Amplify and Forward (AF) Relaying System with Relay Selection Strategy

2021 International Electronics Symposium (IES), 2021
The joint PAPR reduction and predistortion technique is the one solution to remove the nonlinear distortions of nonlinear high-power amplifier (HPA) and to increase the power efficiency. This paper can be used as a reference for the development of LTE network in future research.
Mareta Dwi Nor Habibah, Galuh Setya Palupi, Annisa Anggun Puspitasari, Ummi Ainun Nadhiroh, Mohamad Ridwan, Yoedy Moegiharto   +5 more
openaire   +1 more source