Browsing by Subject "Cognitive systems"
Now showing items 1-8 of 8
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Cognitive Radio Networks with Probabilistic Relaying: Stable Throughput and Delay Tradeoffs
( Institute of Electrical and Electronics Engineers Inc. , 2015 , Article)This paper studies fundamental throughput and delay tradeoffs in cognitive radio systems with cooperative secondary users. We focus on randomized cooperative policies, whereby the secondary user (SU) serves either its own ... -
Effective capacity of cognitive radio links: Accessing primary feedback erroneously
( Institute of Electrical and Electronics Engineers Inc. , 2014 , Conference Paper)We study the performance of a cognitive system modeled by one secondary and one primary link and operating under statistical quality of service (QoS) delay constraints. We analyze the effective capacity (EC) to quantify ... -
Joint routing and resource allocation for delay sensitive traffic in cognitive mesh networks
( IEEE , 2011 , Conference Paper)In this paper we study the problem of joint design of routing and resource allocation in cognitive radio based wireless mesh networks. Our study focuses on a cognitive system model in which secondary nodes have delay ... -
Large-scale cognitive cellular systems: Resource management overview
( Institute of Electrical and Electronics Engineers Inc. , 2015 , Article Review)This article presents recent advancements in resource management for large-scale DSA systems. Although the problem of spectrum and power allocation is well addressed in the literature, the need for more efficient algorithms ... -
Maximum Secondary Stable Throughput of a Cooperative Secondary Transmitter-Receiver Pair: Protocol Design and Stability Analysis
( Institute of Electrical and Electronics Engineers Inc. , 2016 , Conference Paper)In this paper, we investigate the impact of cooperation between a secondary transmitter-receiver pair and a primary transmitter on the maximum stable throughput of the primary-secondary network. Each transmitter, either ... -
On the degrees of freedom of the cognitive broadcast channel
(2011 , Conference Paper)Cognitive broadcast channel, where two multiantenna transmitters communicate with their respective receivers, is considered. One of the transmitters is said to be cognitive (secondary) as it is assumed to know the messages ... -
On the Higher Order Statistics of the Channel Capacity in Dispersed Spectrum Cognitive Radio Systems Over Generalized Fading Channels
( Institute of Electrical and Electronics Engineers Inc. , 2016 , Article)This work is devoted to the study of dispersed spectrum cognitive radio (CR) systems over independent and nonidentically distributed (i.n.i.d.) generalized fading channels. More specifically, this is performed in terms of ... -
Priority-based zero-forcing in spectrum sharing cognitive systems
( IEEE , 2013 , Article)We consider a spectrum sharing scenario between cognitive radio (CR) users and a licensed primary user (PU), in which the PU is not able to successfully transmit data to its destined receiver. The cognitive base station ...