Browsing by Subject "Cognitive network"
Now showing items 1-11 of 11
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A sparsity-aware approach for NBI estimation and mitigation in large cognitive radio networks
( Institute of Electrical and Electronics Engineers Inc. , 2016 , Conference Paper)Underlay cognitive networks should follow strict interference thresholds to operate in parallel with primary networks. This constraint limits their transmission power and eventually the coverage area. Therefore, in this ... -
Energy allocation optimization for AF multi-hop in a cognitive radio system
( Elsevier B.V. , 2018 , Article)In this paper, novel optimal energy allocation schemes for the secondary users in an amplify-and-forward multi-hop underlay cognitive network are proposed. The optimization problem is formulated as a maximization of the ... -
Outage analysis of selective cooperation in underlay cognitive networks with fixed gain relays and primary interference modeling
( IEEE , 2012 , Conference Paper)Selective cooperation is a well investigated technique in non-cognitive networks for efficient spectrum utilization and performance improvement. However, it is still a nascent topic for underlay cognitive networks. Recently, ... -
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 relay selection schemes in underlay cognitive networks with Decode and Forward relaying
( IEEE , 2012 , Conference Paper)In underlay cognitive networks with regenerative relaying, secondary users operating with primary user are adhering to stringent interference constraint which limits their transmission power and coverage area. In order not ... -
Performance analysis of selective cooperation in underlay cognitive networks over Rayleigh channels
( IEEE , 2011 , Conference Paper)Underlay cognitive networks should follow strict interference thresholds to operate in parallel with primary networks. This constraint limits their transmission power and eventually the area of coverage. Therefore, it is ... -
Priority-based scheduling for limited energy cognitive relaying
( IEEE , 2010 , Conference Paper)We study the problem of cognitive relaying with limited-energy constraint in opportunistic spectrum access cognitive networks. Under this network setting, the cognitive user increases the spectrum availability for its own ... -
Reactive relay selection in underlay cognitive networks with fixed gain relays
( IEEE , 2012 , Conference Paper)Best relay selection is a bandwidth efficient technique for multiple relay environments without compromising the system performance. The problem of relay selection is more challenging in underlay cognitive networks due to ... -
Real-time throughput prediction for cognitive Wi-Fi networks
( Academic Press , 2020 , Article)Wi-Fi as a wireless networking technology has become a widely acceptable commonplace. Over the course of time, the applications landscape of Wi-Fi networks is growing tremendously. The proliferation of new services is ... -
Secondary users selection and sparse narrow-band interference mitigation in cognitive radio networks
( Elsevier B.V. , 2018 , Article)Spectrum scarcity is a critical problem that may reduce the effectiveness of wireless technologies and services. To address this problem, different spectrum management techniques have been proposed in the literature such ... -
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 ...