Performance Analysis of Uplink IM-OFDMA Systems in the Presence of CFO and Rx-IQI

Alaca, Ozgur; Althunibat, Saud; Yarkan, Serhan; Miller, S.L.; Qaraqe, Khalid

doi:10.1109/icoin56518.2023.10048914

Cited by 9 publications

(2 citation statements)

References 27 publications

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“…It should be noted that previous studies only examined the performance of IM-OFDMA under practical IQI (P-IQI) and have yet to address data confidentiality and A-IQI issues. Further, the joint impact of receiver IQI and carrier frequency offset on the IM-OFDMA performance is examined in [32].…”

Section: A Related Workmentioning

confidence: 99%

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: A Related Workmentioning

confidence: 99%

Secure Uplink IM-OFDMA With Artificial IQ Imbalance

et al. 2023

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“…In [11], the issue of the wireless image transmission over OFDMA is investigated for different modulation schemes, different basis functions, and different subcarriers mapping schemes over a frequency selective channel. The authors in [8] discussed the error performance of uplink Index modulation-based OFDMA (IM-OFDMA) in the presence of CFO and in-phase and quadrature imbalance (IQI) at the receiver. A new approach for estimating CFO in uplink FIGURE 1 Structure of the uplink DFT-OFDMA system in the presence of CFOs.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of orthogonal frequency‐division multiple‐access systems in the presence of carrier frequency offset using wireless images transmission

Soufy

Al-Kamali

2023

IET Communications

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Orthogonal Frequency-Division Multiple-Access (OFDMA) is used in different recent wireless communication systems. However, it is susceptible to carrier frequency offset (CFO) which effects the orthogonality between subcarriers and causes inter-carrier interference (ICI) and multiple access interference (MAI). The aim of this paper is to analyze the impact of the CFOs on the performance of Discrete Sine Transform (DST) DST-OFDMA, Discrete Cosine Transform (DCT) DCT-OFDMA and Discrete Fourier Transform (DFT) DFT-OFDMA systems and to evaluate them with different modulation schemes and different subcarriers mapping schemes over vehicular A and Stanford University Interim (SUI) 3 channels. Transmission of image over the wireless system is performed to analyze and investigate the performance in terms of the Peak Signal-to-Noise Ratio (PSNR), and the Mean Square Error (MSE). Through the evaluation, with CFO compensation, without CFO, and without CFO compensation cases are considered. In this work, Joint Minimum Mean Square Error (JMMSE) equalization and CFO compensation technique is used. It is noted that when the QPSK scheme and the SUI3 channel model are used then the DCT-OFDMA system provides better MSE and PSNR performances than other systems for the JMMSE compensation technique.

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