On the performance of underlay cognitive radio system with random mobility under imperfect channel state information

Odeyemi, Kehinde O.; Owolawi, Pius A.; Olakanmi, Oladayo Olufemi

doi:10.1002/dac.4561

Cited by 2 publications

(1 citation statement)

References 34 publications

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“…Additionally, [49] expanded the analysis of a system with a mobile receiver in a fading environment to the case in which the transmission of the cognitive node is in accordance with the imposed limitation of a primary network and an available, imperfect CSI [49]. It was assumed that the propagation environment is subject to Rayleigh fading distribution as a special case of Nakagami-m fading distribution.…”

Section: Related Workmentioning

confidence: 99%

Performance Analysis of Wirelessly Powered Cognitive Radio Network with Statistical CSI and Random Mobility

Kozić

Blagojević

Cvetković

et al. 2023

Sensors

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The relentless expansion of communications services and applications in 5G networks and their further projected growth bring the challenge of necessary spectrum scarcity, a challenge which might be overcome using the concept of cognitive radio. Furthermore, an extremely high number of low-power devices are introduced by the concept of the Internet of Things (IoT), which also requires efficient energy usage and practically applicable device powering. Motivated by these facts, in this paper, we analyze a wirelessly powered underlay cognitive system based on a realistic case in which statistical channel state information (CSI) is available. In the system considered, the primary and the cognitive networks share the same spectrum band under the constraint of an interference threshold and a maximal tolerable outage permitted by the primary user. To adopt the system model in realistic IoT application scenarios in which network nodes are mobile, we consider the randomly moving cognitive user receiver. For the analyzed system, we derive the closed-form expressions for the outage probability, the outage capacity, and the ergodic capacity. The obtained analytical results are corroborated by an independent simulation method.

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Section: Related Workmentioning

confidence: 99%

Performance Analysis of Wirelessly Powered Cognitive Radio Network with Statistical CSI and Random Mobility

Kozić

Blagojević

Cvetković

et al. 2023

Sensors

View full text Add to dashboard Cite

show abstract

Physical Layer Security in an OFDM Time Reversal SISO Communication With Imperfect Channel State Information

et al. 2022

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A frequency domain time-reversal (TR) precoder is proposed to perform physical layer security in single-input single-output (SISO) systems using orthogonal frequency-division multiplexing (OFDM) and artificial noise (AN) injection. This scheme guarantees the secrecy of a communication towards a legitimate user, Bob, by exploiting the frequency diversity selective behaviour in multipath channels. The transmitter, Alice, has imperfect channel state information (CSI) of the legitimate link thanks to the channel reciprocity in time division duplex systems and does not know the instantaneous CSI of a potential eavesdropper, Eve. Three optimal decoding structures at Eve are considered in a block fading environment depending on the handshake procedure between Alice and Bob. Closed-form approximations of the signal-to-noise ratio required at Bob and the maximal CSI error that can be made at Alice, in order to guarantee a communication ergodic secrecy rate (ESR), are derived. Furthermore, the optimal amount of AN energy to inject, considering imperfect CSI, is also given as a closed-form expression. A trade-off on the choice of the spreading factor of the TR precoder is established between maximizing the ESR and decreasing the −achievable secrecy rate. Finally, thanks to these results, Alice can be a priori aware of the ESR over which she can establish a secure communication.INDEX TERMS Artificial noise, block-fading, eavesdropper, ergodic secrecy rate, physical layer security, −achievable secrecy rate , SISO-OFDM, time division duplex , time-reversal.

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On the performance of underlay cognitive radio system with random mobility under imperfect channel state information

Cited by 2 publications

References 34 publications

Performance Analysis of Wirelessly Powered Cognitive Radio Network with Statistical CSI and Random Mobility

Performance Analysis of Wirelessly Powered Cognitive Radio Network with Statistical CSI and Random Mobility

Physical Layer Security in an OFDM Time Reversal SISO Communication With Imperfect Channel State Information

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