On the Physical Layer Security Characteristics for MIMO-SVD Techniques for SC-FDE Schemes

Madeira, Joao; Guerreiro, João; Dinis, Rui; Montezuma, Paulo; Campos, Luis Miguel

doi:10.3390/s19214757

Cited by 3 publications

(8 citation statements)

References 36 publications

(40 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…PHY-security aspects have been thoroughly investigated in the literature for various network scenarios under different fading channels without considering the cognitive framework [11][12][13][14][15][16][17][18][19][20]. Furthermore, the authors in [21] have proposed a machine-learning-based method to locate the vehicles generating jamming signals by monitoring the physical channel parameters of the vehicles in the vehicular networks.…”

Section: Related Workmentioning

confidence: 99%

Secure Cognitive Radio-Enabled Vehicular Communications under Spectrum-Sharing Constraints

Yadav

Pandey

et al. 2021

Sensors

View full text Add to dashboard Cite

Vehicular communication has been envisioned to support a myriad of essential fifth-generation and beyond use-cases. However, the increasing proliferation of smart and intelligent vehicles has generated a lot of design and infrastructure challenges. Of particular interest are the problems of spectrum scarcity and communication security. Consequently, we considered a cognitive radio-enabled vehicular network framework for accessing additional radio spectrum and exploit physical layer security for secure communications. In particular, we investigated the secrecy performance of a cognitive radio vehicular network, where all the nodes in the network are moving vehicles and the channels between them are modeled as double-Rayleigh fading. Furthermore, adopting an underlay approach, the communication between secondary nodes can be performed by employing two interference constraint strategies at the primary receiver; (1) Strategy I: the secondary transmitter power is constrained by the interference threshold of the primary receiver, and (2) Strategy II: the secondary transmitter power is constrained by both the interference threshold of the primary receiver and the maximum transmit power of the secondary network. Under the considered strategies, we derive the exact secrecy outage probability (SOP) and ergodic secrecy capacity (ESC) expressions over double-Rayleigh fading. Moreover, by analyzing the asymptotic SOP behavior, we show that a full secrecy diversity of 1 can be achieved, when the average channel gain of the main link goes to infinity with a fixed average wiretap channel gain. From the ESC analysis, it is revealed that the ESC follows a scaling law of ΘlnΩm2Ωe2 for large Ωm and Ωe, where Ωm and Ωe are the average channel gains of the main link and wiretap link. The numerical and simulation results verify our analytical findings.

show abstract

Section: Related Workmentioning

confidence: 99%

Secure Cognitive Radio-Enabled Vehicular Communications under Spectrum-Sharing Constraints

Yadav

Pandey

et al. 2021

Sensors

View full text Add to dashboard Cite

show abstract

“…The transmitter sends C data blocks, with C ≤ R, and each data block is composed by the sum of two blocks of N Quadrature Phase Shift Keying (QPSK) symbols with differing power (the generalization to other constellations is straightforward [21]). Contrary to the single user system studied in [17], fir the power domain NOMA scenario of this work, we must define the symbols to be transmitted to both users. The data symbols transmitted for user B are denoted by the C × N matrix s B , with each data stream defined as an…”

Section: System Characterizationmentioning

confidence: 99%

“…The detection at User C is significantly different from the detection scheme employed in [17]. This is explained by the modifications required for the interleaving scheme and by the use of a partial key.…”

Section: Receiver Bmentioning

confidence: 99%

“…where D k AB ,los and D k AC ,los are the low fading, highly correlated LOS components and R k AB ,mp and R k AC ,mp are the high fading multipath components of the respective channels. We then substitute these channels in 7, (8), (17), and (31) as:…”

Section: Line-of-sight Link Scenariomentioning

confidence: 99%

“…Although there are many published works on PLS techniques, most of them focus on Orthogonal Frequency Division Multiplexing (OFDM) [16], and few are dedicated to SC systems. In [17], an SC system is analyzed, however, it does not consider a NOMA scenario, which poses additional security concerns. As is widely known, SC-FDE systems are appealing due to their lower Peak-to-Average Power Ratio (PAPR) when compared to multicarrier schemes.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A Physical Layer Security Technique for NOMA Systems with MIMO SC-FDE Schemes

Madeira¹,

Guerreiro

Serra

et al. 2020

Electronics

Self Cite

View full text Add to dashboard Cite

Current wireless communication systems employ Multi-Input, Multi-Output (MIMO) techniques to increase spectral efficiency, at the cost of higher hardware complexity. Most of these systems continue to employ traditional Orthogonal Multiple Access (OMA) schemes, which are suboptimal when compared to Non-Orthogonal Multiple Access (NOMA) schemes. By combining NOMA with MIMO, it is possible to achieve higher spectral efficiencies. However, security in NOMA-MIMO systems remains a problem. In this paper, we study the physical layer security issues of a power based NOMA-MIMO system with a Singular Value Decomposition (SVD) scheme, employed along with Single Carrier with Frequency Domain Equalization (SC-FDE) techniques. We consider a scenario where there is an unintended eavesdropper attempting to listen to the messages being exchanged. It is shown that the higher the channel estimate correlation between transmitter and receiver, the higher the secrecy rate, particularly for a scenario where there is a Line-Of-Sight (LOS) between all users. Therefore, power based NOMA MIMO-SVD schemes, combined with SC-FDE, can be considered efficient options for highly secure MIMO communications.

show abstract

A Scheduling Scheme for Improving the Performance and Security of MU-MIMO Systems

Mora

Garzón

Cacuango

et al. 2022

Sensors

View full text Add to dashboard Cite

For the receiver of multiple-input multiple-output (MIMO) systems, linear detectors are an interesting option due to their good performance and low complexity. Nevertheless, MIMO systems lose diversity in exchange for eliminating interference when linear detectors are used. Aiming to maintain the system diversity while mitigating interference between users, this work proposes a scheduling scheme for the uplink of multiuser MIMO (MU-MIMO) systems that employ A antennas and the zero-forcing (ZF) detector at the receiver in the base station (BS). The channel model includes Rician fading and additive white Gaussian noise (AWGN) in an imperfect channel estimation scenario. The proposed scheme selects U users from a group of Ut users to transmit simultaneously, so that the signal-to-noise ratio (SNR) is maximized. For this, an exact expression to evaluate the SNR of the users is obtained. With this result, the scheduling strategy is proposed. Results show that as Ut increases, the outage probability (OP), and the bit error rate (BER) decrease as the system diversity increases, even when the system is completely loaded, i.e., when U=A. Moreover, it is shown that the scheduling scheme counteracts the imperfect channel estimation effects as Ut increases. Finally, the proposed scheme is tested in presence of an external eavesdropper trying to decode the information sent by the users. The results show that the presented proposal allows for a reduction of the secrecy-outage-probability (SOP) as Ut increases.

show abstract

On the Physical Layer Security Characteristics for MIMO-SVD Techniques for SC-FDE Schemes

Cited by 3 publications

References 36 publications

Secure Cognitive Radio-Enabled Vehicular Communications under Spectrum-Sharing Constraints

Secure Cognitive Radio-Enabled Vehicular Communications under Spectrum-Sharing Constraints

A Physical Layer Security Technique for NOMA Systems with MIMO SC-FDE Schemes

A Scheduling Scheme for Improving the Performance and Security of MU-MIMO Systems

Contact Info

Product

Resources

About