Browsing by Subject "Channel state information"
Now showing items 1-18 of 18
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Cognitive relay-sharing by using hierarchical modulation under interference constraints
( Institute of Electrical and Electronics Engineers Inc. , 2014 , Conference Paper)In this paper, we investigate relay-sharing in cognitive radio (CR) networks to improve the secondary user's (SU's) performance in the presence of interference. It is assumed that the relay is shared simultaneously between ... -
Energy efficient mobile relay selection for two-hop wireless networks
( IEEE Computer Society , 2014 , Conference Paper)In this paper, we propose a relay selection strategy for randomly distributed multiple relays. A single relay is selected for transmitting signal from a fixed source to a fixed destination which requires minimum total ... -
On physical layer security of correlated multiantenna cognitive radio receivers
( Institute of Electrical and Electronics Engineers Inc. , 2021 , Conference Paper)In limited space scenarios, the antennas in the multiantenna cognitive radio (CR) system are closely spaced and often experience correlation among them. In this work, the secrecy performance of correlated multiantenna CR ... -
On the Ergodic Secrecy Rate of Massive MIMO Transmission with Partial Legitimate User CSI
( Institute of Electrical and Electronics Engineers Inc. , 2019 , Conference Paper)In this paper, we consider the downlink transmission over a single-cell massive multiple-input-multiple-output (MIMO) system in the presence of multiple single-antenna eavesdroppers (massive MIMOME). We concentrate on the ... -
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 ... -
Performance analysis of cooperative communication system with feedback delay and channel estimation error
( Institute of Electrical and Electronics Engineers Inc. , 2015 , Conference Paper)In this paper, we investigate the impact of feedback delay and channel estimation error (CEE) on the performance of wireless multi-user decode-and-forward (DF) relay systems in independent and non identically distributed ... -
Performance analysis of relay selection schemes in underlay cognitive networks with imperfect channel state information
( IEEE Computer Society , 2013 , Conference Paper)Cognitive Radio (CR) aims to improve spectrum utilization by allowing unlicensed users to access the licensed spectrum and to coexist with primary user (PU) while respecting the PU's restrictions. An interesting case to ... -
Performance enhancement of cognitive relay networks using regression functions
( Institute of Electrical and Electronics Engineers Inc. , 2016 , Conference Paper)In a spectrum sharing relay-aided secondary network, the design objective shifts from minimizing the violation of the primary system constraints when using the outdated channel state information (CSI), to making the best ... -
Relay selection schemes to minimise outage in wireless powered communication networks
( Institution of Engineering and Technology , 2016 , Article)In this study, the authors discuss relay selection schemes with the objective to minimise outage probability for a network consisting of a single source, multiple relays and a single destination. The relays are powered by ... -
Secrecy for MIMO wiretap and MIMO broadcast channels with fading eavesdroppers: CSI does not increase the secure DoF
( Institute of Electrical and Electronics Engineers Inc. , 2015 , Conference Paper)We investigate the secure degrees of freedom (SDoF) of the wiretap and the K user Gaussian broadcast channels with multiple antennas at the transmitter, the legitimate receivers and an unknown number of eavesdroppers each ... -
Secrecy Performance of Cooperative NOMA System with Multiple Full-Duplex Relays against Non-Colluding/Colluding Eavesdroppers
( Institute of Electrical and Electronics Engineers Inc. , 2020 , Conference Paper)In 5G and beyond wireless communication net-works, non-orthogonal multiple access (NOMA) and Full-Duplex (FD) techniques are considered as promising key techniques. However, the secrecy in NOMA systems has proven to be ... -
Secure DoF for the MIMO MAC: The case of knowing eavesdropper's channel statistics only
( Institute of Electrical and Electronics Engineers Inc. , 2019 , Conference Paper)Physical layer security has attracted research attention as a means to achieve secure communication without the need for complicated upper layer encryption techniques. The secure degrees of freedom (SDoF) of various networks ... -
Secure multiple-mode OFDM with index modulation
( Institute of Electrical and Electronics Engineers Inc. , 2020 , Conference Paper)Multiple-mode orthogonal frequency division multiplexing with index modulation (MM-OFDM-IM) is a promising IM technique for OFDM systems to improve the spectral efficiency. In this paper, a secure index and data symbol ... -
Sequential random selection relaying for energy efficient wireless sensor networks
( IEEE , 2010 , Conference Paper)In a wireless sensor network with relaying capability, intermediate relay nodes are with limited energy budget. To maximize lifetime of relay nodes, selective relay strategies, requiring full channel state information ... -
Sparsity-aware Multiple Relay Selection In Large Decode-and-forward Relay Networks
( Hamad bin Khalifa University Press (HBKU Press) , 2014 , Conference Paper)Cooperative communication is a promising technology that has attracted significant attention recently thanks to its ability to achieve spatial diversity in wireless networks with only single-antenna nodes. The different ... -
Sparsity-aware multiple relay selection in large multi-hop decode-and-forward relay networks
( Springer International Publishing , 2016 , Article)In this paper, we propose and investigate two novel techniques to perform multiple relay selection in large multi-hop decode-and-forward relay networks. The two proposed techniques exploit sparse signal recovery theory to ... -
Sparsity-aware narrowband interference mitigation and subcarriers selection in OFDM-based cognitive radio networks
( Institute of Electrical and Electronics Engineers Inc. , 2016 , Conference Paper)In this paper, the performance of an orthogonal frequency division multiplexing overlay cognitive radio network with subcarrier selection schemes is investigated. We propose three subcarrier selection techniques that reduce ... -
Trading wireless information and power transfer: Relay selection to minimize the outage probability
( Institute of Electrical and Electronics Engineers Inc. , 2014 , Conference Paper)This paper studies the outage probability minimization problem for a multiple relay network with energy harvesting constraints. The relays are hybrid nodes used for simultaneous wireless information and power transfer from ...