Browsing by Subject "Cooperative networks"
Now showing items 1-18 of 18
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A diversity compression and combining technique based on channel shortening for cooperative networks
( IEEE , 2012 , Article)The cooperative relaying process with multiple relays needs proper coordination among the communicating and the relaying nodes. This coordination and the required capabilities may not be available in some wireless systems ... -
Area spectral efficiency of cooperative network with DF and AF relaying
( IEEE , 2012 , Conference Paper)Most performance metrics for cooperative networks focus on the qualification of either spectrum efficiency or link reliability, without considering the spatial effect of radio transmission. Area spectral efficiency (ASE) ... -
Area spectral efficiency of cooperative network with opportunistic relaying
( IEEE , 2012 , Conference Paper)In this paper, we investigate the area spectral efficiency (ASE) in a three-node cooperative network with opportunistic relaying. On one hand, in conventional cellular network, ASE is defined to be the average data rate ... -
Information sharing in cooperative networks: A generic trustworthy issue
( Institute of Electrical and Electronics Engineers Inc. , 2016 , Conference Paper)In a cooperative network, users share information with each other to achieve a common target. Due to the concerns of privacy and cost, users may be reluctant to share genuine information with each other, which incurs the ... -
Joint hierarchical modulation and network coding for two way relay networks
( IEEE , 2012 , Conference Paper)The performance of a joint Hierarchical Modulation (HM) and Network Coding (NC) scheme for two way relay networks is introduced and evaluated in this paper. The proposed scheme uses selective relaying based on a signal-to-noise ... -
Joint optimal threshold-based relaying and ML detection in cooperative networks
( IEEE , 2012 , Article)This paper proposes two detection schemes for cooperative networks comprising a source, a relay and a destination. The relay is assumed to operate in a half-duplex mode and it employs decode-and-forward (DF) relaying. The ... -
Joint optimal threshold-based relaying and ml detection in network-coded two-way relay channels
( Institute of Electrical and Electronics Engineers Inc. , 2012 , Article)In this paper, we address the problem of joint optimal threshold-based relaying and maximum likelihood (ML) detection in network-coded cooperative systems. The purpose of using threshold-based relaying is to circumvent the ... -
On Optimizing the Secrecy Performance of RIS-Assisted Cooperative Networks
( Institute of Electrical and Electronics Engineers Inc. , 2020 , Conference Paper)Employing reconfigurable intelligent surfaces (RIS) is emerging as a game-changer candidate, thanks to their unique capabilities in improving the power efficiency and supporting the ubiquity of future wireless communication ... -
On relay assignment in network-coded cooperative systems
( IEEE , 2011 , Article)We consider in this paper relay assignment for cooperative systems with multiple two-way relay channels. The nodes corresponding to one two-way relay channel (henceforth referred to as pair) communicate with each other ... -
On the Achievable Secrecy Diversity of Cooperative Networks with Untrusted Relays
( Institute of Electrical and Electronics Engineers Inc. , 2018 , Article)Cooperative relaying is often deployed to enhance the communication reliability (i.e., diversity order) and consequently the end-to-end achievable rate. However, this raises several security concerns when the relays are ... -
Optimal power allocation and relay selection in two-way multi-relay cooperative communication
(2013 , Conference Paper)In this paper, we investigate the power allocation in two-way multi-relay assisted cooperative network in which the relays operate in decode-and-forward (DF) protocol. In the proposed method for choosing the best relay ... -
Optimization of collaborative spectrum sensing with limited time resource
( Springer Verlag , 2015 , Conference Paper)In this paper, Cognitive Radios (CRs) collaborate in spectrum sensing to detect random signals corrupted by Gaussian noise. Our analysis is based on a limited time resource assumption. This implies that the time resource ... -
Optimization of probability of error in collaborative spectrum sensing of time-limited cognitive radio networks
( Institute of Electrical and Electronics Engineers Inc. , 2016 , Conference Paper)We study the probability of error optimization problem in collaborative spectrum sensing (CSS) with limited time resources in cognitive radio (CR) networks. The frame structures for sensing and data transmission, if the ... -
Partial relay selection in underlay cognitive networks with fixed gain relays
( IEEE , 2012 , Conference Paper)In a communication system with multiple cooperative relays, selecting the best relay utilizes the available spectrum more efficiently. However, selective relaying poses a different problem in underlay cognitive networks ... -
Performance analysis of best relay selection scheme for amplify-and-forward cooperative networks in identical Nakagami-m channels
( IEEE , 2010 , Conference Paper)In cooperative communication networks, the use of multiple relays between the source and the destination was proposed to increase the diversity gain. Since the source and all the relays must transmit on orthogonal channels, ... -
Performance analysis of best relay selection scheme for fixed gain cooperative networks in non-identical Nakagami-m channels
( IEEE , 2010 , Conference Paper)Selecting the best relay among all the relays ready to cooperate saves system resources and utilizes the available bandwidth more efficiently compared to the regular all-relay cooperation. This scheme also achieves the ... -
Performance of non-coherent decode-and-forward relaying over time-varying fading channels
( Institute of Electrical and Electronics Engineers Inc. , 2016 , Conference Paper)Performance analysis of selection combining (SC) for decode-and-forward (DF) relaying in case of general time-varying Rayleigh fading channels is investigated. While auto-regressive (AR) time series model is applied in ... -
Precoding-Aided Spatial Modulation for the Wiretap Channel with Relay Selection and Cooperative Jamming
( Hindawi Limited , 2018 , Article)We propose in this paper a physical-layer security (PLS) scheme for dual-hop cooperative networks in an effort to enhance the communications secrecy. The underlying model comprises a transmitting node (Alice), a legitimate ...