Exploiting Secure Performance of Full-Duplex Decode and Forward in Optimal Relay Selection Networks

Dao, Thu-Thuy Thi; Nguyen, Ngoc-Long; Nguyen, Hong-Nhu; Le, Si-Phu; Do, Dinh‐Thuan; Nguyen, Quyet; Vozňák, Miroslav; Sevcik, Lukas

doi:10.5755/j01.eie.24.4.21483

Cited by 2 publications

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“…Due to the symmetry of the proposed system model in Figure 1, without loss of generality, assume that S n and S f are near and far sources from the relays, respectively, where n, f ∈ f1, 2g and n ≠ f . Applying the SIC technique [5,6,24,27,32], firstly, the relays decode the signal x n of the nearby source which has better average channel quality while the signal x f is considered as interference. The received signal-to-interference-plus-noise ratio (SINR) for detecting x n is given by…”

Section: System Modelmentioning

confidence: 99%

“…When γ ⟶ +∞, we obtain asymptotic expression as where ϕ 6 = ðγ t ðα n λ n + α f λ f Þð1 − ρ 2 ÞÞ/α n and ϕ 7 = ðγ t ðα n λ n + α f λ f Þð1 − ρ 2 ÞÞ/α f : Remark 5. In the SIC-3TS protocol, the outage probabilities and the asymptotic expressions of the sources S f and S n are also identified as closed-form formulas ( 19), ( 23), (24), and (25), respectively. OP S f γ⟶+∞…”

Section: Op S N D N ≤Dmentioning

confidence: 99%

“…The mismatch can happen due to the feedback delays of the CSIs [12,14,16,19,22] or the faults in the CSI estimating process [20,21]. One-way NOMA and cooperative NOMA (CNOMA) networks with the SIC have been widely discussed to increase spectral efficiency gain, improve secure performance, enlarge system energy efficiency, and enhance significantly sum throughput in several studies [1,4,[23][24][25]. Besides, two-way cooperative networks have advantages in using frequency spectral efficiency over one-way networks because two sources are able to both transmit and receive signals.…”

Section: Introductionmentioning

confidence: 99%

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Cancel‐Decode‐Encode Processing on Two‐Way Cooperative NOMA Schemes in Realistic Conditions

Dao

2021

Wireless Communications and Mobile Computing

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This paper considers the effects of perfect/imperfect successive interference cancellation (SIC) and perfect/imperfect ` information (CSI) in a multiple-relay two-way cooperative network using nonorthogonal multiple access (NOMA) and digital network coding (DNC). In this model, a relay is selected by maximizing estimated channel gains to enhance the decoding capacity of the nearer source and minimize the collection time of imperfect CSI. Spectrum utilization efficiency is enhanced two times by a mixture of the SIC and DNC techniques at the selected relay (called as the SIC-2TS protocol). The system performance is considered through analysis of the exact and asymptotic expressions of the system outage probabilities and throughput. The major thing is exposed as the proposed SIC-2TS protocol can reach the best performance at optimal positions of the selected relay. Besides, the system throughput of the proposed protocol outperforms a SIC-utilized two-way relaying scheme without the DNC (called as the SIC-3TS protocol) and a conventional two-way scheme (called as the CONV-4TS protocol) for all signal-to-noise ratio regions. Lastly, the validity of the analytical expressions is verified by the Monte Carlo simulation results.

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Section: System Modelmentioning

confidence: 99%

Section: Op S N D N ≤Dmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Cancel‐Decode‐Encode Processing on Two‐Way Cooperative NOMA Schemes in Realistic Conditions

Dao

2021

Wireless Communications and Mobile Computing

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“…Regarding physical layer security, it is considered as one of the promising paradigm related to fields of information security and wireless communications as it can realize the secrecy communication by utilizing the untrusted nature of relay without any encryption algorithm. Such NOMA also needs secure consideration as other emerging networks . In fact, in some cases, the relays themselves may not be worth trusting.…”

Section: Introductionmentioning

confidence: 99%

“…[14][15][16] Such NOMA also needs secure consideration as other emerging networks. 17 In fact, in some cases, the relays themselves may not be worth trusting. In real systems, these untrusted relays still help the system in information transmission.…”

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confidence: 99%

Evaluating secrecy performance of cooperative NOMA networks under existence of relay link and direct link

Nguyen

2019

Int J Communication

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Summary The secrecy performance of a nonorthogonal multiple access (NOMA) system is examined in this study by employment of a dual‐hop decode‐and‐forward (DF) relay under existence of eavesdropper. Due to the fact that the relay is trusted or untrusted device and thus eavesdropper may wiretap information from the base station or the relay. In this regard, three scenarios related to trusted and untrusted relays are proposed, with different assumptions on the information overhearing ability of the eavesdropper; ie, the first scenario is that an eavesdropper overhears signal from the relay while the BS is overheard by eavesdropper in the second scenarios. More specifically, we derive closed‐form expressions for the secure probability metrics when the direct and relay links experience independent Rayleigh fading. There metrics include strictly positive secrecy capacity (SPSC) and the secure outage probability (SOP). Furthermore, secure performance of traditional orthogonal multiple access (OMA) is also provided as further comparison with NOMA counterpart. We analyze the influence of main coefficients such as the target rates and the transmit SNR factors on the secrecy performance. Our results specify that for reasonable selection of such parameters, secrecy performance can be enhanced remarkably. Numerical results are delivered to corroborate the derived results.

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Exploiting Secure Performance of Full-Duplex Decode and Forward in Optimal Relay Selection Networks

Cited by 2 publications

References 0 publications

Cancel‐Decode‐Encode Processing on Two‐Way Cooperative NOMA Schemes in Realistic Conditions

Cancel‐Decode‐Encode Processing on Two‐Way Cooperative NOMA Schemes in Realistic Conditions

Evaluating secrecy performance of cooperative NOMA networks under existence of relay link and direct link

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