Results 181 to 190 of about 668,337 (217)

Cooperative Secrecy Beamforming in Wiretap Interference Channels

IEEE Signal Processing Letters, 2015
This paper exploits co-channel interference (CCI) to secure the multi-antenna wiretap IFC consisting of two source-destination-eavesdropper triples, where each source-destination link is wiretapped by an external eavesdropper. To this end, we first propose a cooperative secrecy beamforming scheme, which is proved to be sufficient and necessary to ...
Lingxiang Li, Chuan Huang 0001, Zhi Chen 0002   +2 more
openaire   +2 more sources

Max-Min Beamforming with Cooperative Multipoint Transmission

2011 IEEE Vehicular Technology Conference (VTC Fall), 2011
In a network with frequency reuse-1 intercell interference(ICI) is a limiting factor. Especially cell edge users are subject to strong ICI. In long term evolution (LTE) those users can be served by multiple base stations (BSs). By using a cooperation among multiple BSs, the signal to interference and noise ratio (SINR) can be balanced.
Guido Dartmann, Xitao Gong, Gerd Ascheid
openaire   +1 more source

Distance Thresholds Analysis for Cooperative Beamforming in WSNs

2016
Cooperative beamforming (CBF) scheme may not consume less energy than single-input-single-output (SISO) scheme in wireless sensor networks (WSNs). In order to select an energy efficient transmission scheme from the two schemes, the distance thresholds at which the CBF scheme outperforms the SISO scheme in energy efficiency are investigated, an optimal ...
Xiong Gan, Hong Lu 0007, Guangyou Yang
openaire   +2 more sources

An adaptive beamforming scheme for cooperative wireless networks

2009 16th International Conference on Digital Signal Processing, 2009
In this work we present an adaptive beamforming scheme for the uplink transmission of a cooperative wireless system consisted of a single antenna source, single antenna relays and a multiple antenna destination (base station). First, we present a SVD-based beamforming scheme under the assumption that perfect Channel State Information (CSI) is available
Christos G. Tsinos, Kostas Berberidis
openaire   +1 more source

Cooperative MIMO-beamforming for multiuser relay networks

2008 IEEE International Conference on Acoustics, Speech and Signal Processing, 2008
In this paper, we develop a beamforming algorithm for multiuser MIMO-relaying wireless systems. We consider a relaying scenario with multiple sources transmitting to one or more destination nodes through several relay terminals. Each relay is equipped with multiple antennas.
Amr El-Keyi, Benoît Champagne 0001
openaire   +1 more source

Cooperative Filter-and-Forward Beamforming with Linear Equalization

2010 IEEE Global Telecommunications Conference GLOBECOM 2010, 2010
In this paper, we investigate filter--and--forward beamforming (FF--BF) for relay networks employing single--carrier transmission over frequency--selective channels. In contrast to prior work, we assume that the destination node is equipped with a simple linear equalizer. The FF--BF filters at the relays are optimized for maximization of the signal--to-
Yang-wen Liang, Aïssa Ikhlef, Wolfgang H. Gerstacker, Robert Schober   +3 more
openaire   +1 more source

Cooperative diversity with opportunistic beamforming in MIMO systems

2010 International Conference on Wireless and Ubiquitous Systems, 2010
The performance of cooperative diversity with opportunistic beamforming is analyzed in rayleigh fading channels. Cooperative communication is viewed as a method for increasing diversity gain and reducing end to end path loss. The use of relays can create a virtual antenna array so that it allows users to exploit the advantages of multiple input ...
Sondes Maadi, Noureddine Hamdi
openaire   +2 more sources

Cooperative Beamforming for a Two-Cell System with Limited Feedback

2013 IEEE 77th Vehicular Technology Conference (VTC Spring), 2013
In this paper we investigate a two-cell downlink scenario with base station cooperation. We assume that a limited amount of feedback for channel state information (CSI) is available and optimize the numbers of bits for quantizing the desired and interfering channels.
Zhao, Bo, Czylwik, Andreas
openaire   +2 more sources

Cooperative beamforming for wireless sensor networks

2nd European Conference on Antennas and Propagation (EuCAP 2007), 2007
Wireless sensor networks can be used for a multitude of applications but they all have in common that they need to send their collected data to some central processing node. If the sensors are located at a faraway distance from a processing node, the transmission might need the combined transmitter power of several sensors. In this paper we investigate
T. Hult, A. Mohammed
openaire   +1 more source

Cooperative Beamforming for Antieavesdropping Communications Systems

IEEE Systems Journal, 2023
Yan Li 0102, Guoru Ding, Haichao Wang 0001, Li You 0001, Yitao Xu 0001   +4 more
openaire   +1 more source