Spectrum harvesting for heterogeneous wireless networks integration

Gourdache, Samir; Bilami, Azeddine; Barka, Kamel

doi:10.1007/s11276-018-1822-0

Cited by 1 publication

(2 citation statements)

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“…For the sake of clarity, each user's A-IQI parameters are considered to be known or perfectly estimated by the base station. 2 Therewithal, the received signal over the main channel can be represented by using ( 3) and ( 4) as…”

Section: ) Received Signal At the Base Stationmentioning

confidence: 99%

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Secure Uplink IM-OFDMA With Artificial IQ Imbalance

et al. 2023

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This study proposes a novel secure uplink index modulation-based orthogonal frequency division multiple access (IM-OFDMA) systems using artificial in-phase and quadrature imbalance (A-IQI). The fact of the distinct A-IQI induced at the users' end and the unpredictable allocation of users based on confidential data brings a different perspective on physical layer security. Accordingly, in this study, the non-identical effect of A-IQI is exploited to provide a physical-layer security scheme for the IM-OFDMA systems. Specifically, the estimation method is created with preamble data in order to achieve each user's unique A-IQI information from a legitimate receiver. The A-IQI will help to secure the transmitted data against a potential eavesdropper, and hence, improving data confidentiality. The proposed scheme's performance is analytically evaluated by deriving closed-form expressions of the average bit error rate (BER) at both the base station and the eavesdropper. The image rejection ratios of A-IQI and practical IQI are provided for IM-OFDMA to indicate the region of intentionally generated A-IQI. Under the different system model specifications of IM-OFDMA, the analytical results are provided with simulation results obtained using the Monte Carlo simulation method. Further, the proposed secure scheme is compared with the stateof-the-art artificial noise method. Results reveal a significant improvement in the BER at the base station, accompanied by severe degradation in the BER at the eavesdropper.

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Section: ) Received Signal At the Base Stationmentioning

confidence: 99%

“…still underutilized [2]. Also, growing requests for emerging services, applications, and higher data rates will lead to a growth in the number of wireless nodes and terminals in the coming years [3].…”

Section: Introductionmentioning

confidence: 99%