A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2022; you can also visit the original URL.
The file type is application/pdf.
Filters
Optimal Power Allocation for Achieving Secure Green Cognitive Radio Networks
2022
Electronics
Preserved Fulltext
with a primary user, a secondary user, and an eavesdropper. ...
The cognitive radio environment is dynamic, and wireless channels are accessible by both legitimate and illegitimate users. ...
Conflicts of Interest: The authors declare no conflict of interest. ...
doi:10.3390/electronics11131952
fatcat:pyolpdg7srb7ba7falrkcgmr2u
Interference Tolerant Based CR System with Imperfect Channel State Information at the CR-Transmitter
2011
Journal of the Korean Institute of Electromagnetic Engineering and Science
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2017; you can also visit the original URL.
The file type is application/pdf.
First, we show that, compared to the PIP constraint with perfect CSI, the AIP constraint is advantageous for primary users but not for CR users. ...
In practice, it is impossible or very difficult for a CR transmitter to have perfect knowledge of this channel state information (CSI). ...
Fig. 2 . 2 Ergodic capacity of the cognitive radio link.
Fig. 3 . 3 Outage probability of the cognitive radio link.
≤ I av and P CR h ≤ I pk , respectively. ...
doi:10.5515/jkiees.2011.11.2.128
fatcat:q6fh5tkyhrbnnfuvvggulziqyi
HF spectrum activity prediction model based on HMM for cognitive radio applications
2013
Physical Communication
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2017; you can also visit the original URL.
The file type is application/pdf.
These results suggest that the resulting activity model for the HF band could actually be used to predict primary users activity and included in a future HF cognitive radio based station. ...
Our goal is to enhance an efficient use of the HF band by detecting the presence of uncoordinated primary users and avoiding collisions with them while transmitting in different HF channels using our broad-band ...
Acknowledgments This work has been mainly supported by the Spanish Ministry of Science and Innovation project TEC2010-21217-C02 and the Universidad de Las Palmas de Gran Canaria with a scholarship for ...
doi:10.1016/j.phycom.2012.09.004
fatcat:uzkh5ghshfhmjgivenbknmusym
Capacity for Spectrum Sharing Cognitive Radios with MRC Diversity and Imperfect Channel Information from Primary User
2010
2010 IEEE Global Telecommunications Conference GLOBECOM 2010
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2017; you can also visit the original URL.
The file type is application/pdf.
In this paper we study the capacity of spectrum sharing cognitive radios (CR) with Maximal Ratio Combining (MRC) diversity at the secondary receiver under Rayleigh fading. ...
However, the secondary user does not have perfect channel information of SUtx − P Urx link, where the estimation error is considered. ...
, while it is not suitable for cognitive radio for we have to protect the primary users. ...
doi:10.1109/glocom.2010.5683436
dblp:conf/globecom/DuanJEV10
fatcat:fxbe2y6fs5bbvkraxucnfcpliy
Optimal power policies and throughput scaling analyses in fading cognitive broadcast channels with primary outage probability constraint
2014
EURASIP Journal on Wireless Communications and Networking
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2017; you can also visit the original URL.
The file type is application/pdf.
the same spectrum band with a delay-sensitive primary user (PU). ...
The service-quality requirement for the primary user is set by an outage probability constraint (POC). ...
For underlay cognitive radio networks, there are a number of works studying multi-user diversity. ...
doi:10.1186/1687-1499-2014-35
fatcat:4nlzmtt33rbsfifrlruk5fr6nm
Cognitive Radio Protocols Based on Exploiting Hybrid ARQ Retransmissions
2010
IEEE Transactions on Wireless Communications
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2012; you can also visit the original URL.
The file type is application/pdf.
Several protocols are devised that work with varying amounts of channel state information about the cognitive and primary links. ...
This paper addresses user coexistence in cognitive radio systems by taking advantage of opportunities that arise during ARQ retransmission. ...
The information theory community approached the problem as a modified form of the interference channel [5] , via a model known as the cognitive radio channel [6] . ...
doi:10.1109/twc.2010.062910.091162
fatcat:byxgc76hqveg5fbrkthpfzdsjy
Ergodic Capacity of Cognitive Radio Under Imperfect Channel-State Information
2012
IEEE Transactions on Vehicular Technology
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2017; you can also visit the original URL.
The file type is application/pdf.
A spectrum-sharing communication system where the secondary user is aware of the instantaneous channel state information (CSI) of the secondary link, but knows only the statistics and an estimated version ...
The optimum power profile and the ergodic capacity of the secondary link are derived for general fading channels (with continuous probability density function) under average and peak transmit-power constraints ...
Acknowledgment The authors would like to thank Jose Roberto Ayala and Lokman Sboui for their constructive comments. ...
doi:10.1109/tvt.2012.2195042
fatcat:xcuazkyq3vb7bam3xyse2txtbu
Ergodic Capacity of Cognitive Radio under Imperfect Channel State Information
[article]
2012
arXiv
pre-print
Preserved Fulltext
The Internet Archive has a preservation copy of this work in our general collections.
The file type is application/pdf.
A spectrum-sharing communication system where the secondary user is aware of the instantaneous channel state information (CSI) of the secondary link, but knows only the statistics and an estimated version ...
The optimum power profile and the ergodic capacity of the secondary link are derived for general fading channels (with continuous probability density function) under average and peak transmit-power constraints ...
Acknowledgment The authors would like to thank Jose Roberto Ayala and Lokman Sboui for their constructive comments. ...
arXiv:1204.2080v1
fatcat:q2iw4p7j2ncidlr4guhifkr6he
Cognitive Radio with Partial Channel State Information at the Transmitter
2010
IEEE Transactions on Wireless Communications
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2020; you can also visit the original URL.
The file type is application/pdf.
Note that this fulltext copy is not of the "primary" version of this work. The version it corresponds to is:
2008 pre-print arXiv:0810.0870v1 fatcat:aqwrbmjhjzbljeisaprjg24mnqOther Versions
In this paper, we present the cognitive radio system design with partial channel state information known at the transmitter (CSIT).We replace the dirty paper coding (DPC) used in the cognitive radio with ...
Asymptotic analysis also shows that these solutions converge to the optimal ones solved with full CSIT when the K-factor of Rician channel approaches infinity. ...
CONCLUSION In this paper we considered the cognitive radio channel with partial channel side information at the transmitter. ...
doi:10.1109/twc.2010.092410.090725
fatcat:tgythtfcfjgqviwlex4jkwtnfe
Wireless Physical Layer Security with Imperfect Channel State Information: A Survey
[article]
2013
arXiv
pre-print
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2020; you can also visit the original URL.
The file type is application/pdf.
Other Versions
We first present an overview of the main information-theoretic measures of the secrecy performance with imperfect CSI. ...
This paper provides a survey of recent research and development in physical layer security considering the imperfect channel state information (CSI) at communication nodes. ...
Cognitive Radio (CR) has been widely recognized as an effective technology to improve the utilization of wireless spectrum by allowing secondary users to coexist with primary users and access the spectrum ...
arXiv:1307.4146v2
fatcat:nvho2lziqjep5my2zlibtk6hpm
Secrecy Capacity of the Primary System in a Cognitive Radio Network
2015
IEEE Transactions on Vehicular Technology
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2020; you can also visit the original URL.
The file type is application/pdf.
The channel state information of the primary channel is assumed to be perfectly known at both the primary transmitter and receiver, whereas that for the eavesdropper is partially known. ...
Some numerical results will also be presented to verify the analysis. Index Terms-Artificial noise, channel state information, cognitive radio, interference, secrecy capacity. ...
In Section III, the ergodic secrecy capacity of the primary system is derived for the cognitive radio network in two extreme cases where the eavesdropping channel is very strong and very weak, and the ...
doi:10.1109/tvt.2014.2359246
fatcat:a7mxbcg2djhnrcwqaewj6comg4
How to Increase Energy Efficiency in Cognitive Radio Networks
2016
IEEE Transactions on Communications
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2017; you can also visit the original URL.
The file type is application/pdf.
Our numerical results provide guidelines for the design of future cognitive radio networks. ...
The significance of having extra side information and also imperfect side information of cross channels at the secondary transmitter are investigated. ...
limiting the capacity-fall of the primary user may seem more protective for the primary user performance, but there will be a challenge of not having the information of the primary user channel (that is ...
doi:10.1109/tcomm.2016.2535371
fatcat:m25l7y7ylrerzjsqgvvk4wsyge
Power Adaptation for Cognitive Radio Systems Under an Average SINR Loss Constraint in the Absence of Path Loss Information
2013
Wireless personal communications
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2014; you can also visit the original URL.
The file type is application/pdf.
Assuming that the cognitive radio is informed only of the shadow fading between the secondary (cognitive) transmitter and primary receiver, the capacity is achieved via the water-filling power allocation ...
An upper bound is derived on the capacity of a cognitive radio (CR) system by considering the effects of path loss and log-normal shadowing simultaneously for a single-cell network. ...
The ergodic capacity of the SS is evaluated in the case of perfect channel state information (CSI) and interference constraints at the PS user's receiver for different fading scenarios. ...
doi:10.1007/s11277-013-1499-8
fatcat:xtxp6t7f75dnjdwhjvzmbzg6jq
Distributed power allocation for cognitive radio
2007
2007 9th International Symposium on Signal Processing and Its Applications
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2017; you can also visit the original URL.
The file type is application/pdf.
We prove that a cognitive user can vary its transmit power in order to maximize the sum capacity while maintaining a guarantee of service to the primary user. ...
In this paper 1 , we investigate the idea of using cognitive radio to reuse locally unused spectrum for communications. ...
In this work, the cognitive radio behavior is generalized to allow he secondary user to transmit simultaneously with the primary user as long as the level of interference with the primary user remains ...
doi:10.1109/isspa.2007.4555401
dblp:conf/isspa/HaddadDH07
fatcat:v67zcm4amjhadis3gj4wo3yx2q
The Sum-Capacity of the Ergodic Fading Gaussian Cognitive Interference Channel
2015
IEEE Transactions on Wireless Communications
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2017; you can also visit the original URL.
The file type is application/pdf.
This paper characterizes the sum-capacity of the ergodic fading Gaussian overlay cognitive interference channel (EGCIFC), a time-varying channel with two source-destination pairs in which a primary/licensed ...
with per-antenna power constraints and with perfect channel state information at all terminals is also derived. ...
For the state-of-the-art on the two-user cognitive interference channel with constant channel gains (known to all nodes) we refer the reader to [18] and [19] . ...
doi:10.1109/twc.2014.2360382
fatcat:yqutu3iswfgbfkm3w62mh4kxii
« Previous
Showing results 1 — 15 out of 504 results