How much does I/Q Imbalance affect Secrecy Capacity?

Boulogeorgos, Alexandros–Apostolos A.; Karas, Dimitrios S.; Karagiannidis, George K.

doi:10.1109/lcomm.2016.2558561

Cited by 25 publications

(27 citation statements)

References 15 publications

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“…It is recalled here that for practical analog RF front-end electronics, the value of IRR is typically in the range of 20 dB − 40 dB [5], [16]- [18]. Furthermore, the second term, K 2,i g * id,i , is due to the associated imbalances and in multicarrier transmission it denotes the image aliasing effect, which results to crosstalk between the mirror-frequencies in the down-converted signal.…”

Section: B I/q Imbalance Modelmentioning

confidence: 99%

Optimal Power Allocation for OFDMA Systems under I/Q Imbalance

Boulogeorgos¹,

Diamantoulakis²,

Karagiannidis³

2016

IEEE Signal Process. Lett.

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Abstract-Direct-conversion architectures can offer highly integrated low-cost hardware solutions to communication transceivers. However, it has been demonstrated that radio frequency (RF) impairments, such as amplifier nonlinearities, phase noise and in-phase/quadrature-phase imbalances (IQI), can lead to a severe degradation in the performance and fairness. To this end, we study the power allocation (PA) problem in an orthogonal frequency-division multiple access (ODFMA) system, when the served user equipments (UEs) suffer from different levels of IQI. Additionally, we present a novel low-complexity solution with directly calculated PA policies, given the Lagrange multiplier, which mitigates the impact of IQI and achieves fairness in terms of capacity for the served UEs, by maximizing the minimum achievable capacity of the UEs. The effectiveness of the offered solution is validated through simulation results, which reveal that it can drastically increase the minimum achievable UEs' capacity.

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Section: B I/q Imbalance Modelmentioning

confidence: 99%

Optimal Power Allocation for OFDMA Systems under I/Q Imbalance

Boulogeorgos¹,

Diamantoulakis²,

Karagiannidis³

2016

IEEE Signal Process. Lett.

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“…In practice, the transceiver hardware is imperfect due to phase noises, amplifier-amplitude non-linearity and in phase and quadrature imbalance (IQI) [12], [13], which degrades performances of wireless relay networks. The authors in [14] studied the effects of the IQI on the secrecy capacity of the wiretap channel. Results in [14] presented that the IQI should be taken into account in the design of secured communication systems.…”

Section: Introductionmentioning

confidence: 99%

“…The authors in [14] studied the effects of the IQI on the secrecy capacity of the wiretap channel. Results in [14] presented that the IQI should be taken into account in the design of secured communication systems.…”

Section: Introductionmentioning

confidence: 99%

“…To the best of our knowledge, only the published work [14] evaluating the secrecy performances in the presence of the hardware imperfection. However, the authors in [14] only considered the effects of the IQI in one-hop orthogonal frequency-division multiple access (OFDMA) communication systems.…”

Section: Introductionmentioning

confidence: 99%

“…However, the authors in [14] only considered the effects of the IQI in one-hop orthogonal frequency-division multiple access (OFDMA) communication systems. Unlike [14], this paper investigates the impact of hardware impairments on the probability of non-zero se-crecy capacity (PoNSC) of a multi-hop transmission scheme, where the data transmitted from a source, via multiple relays, to a destination is overheard by an eavesdropper. In the proposed scheme, the transceiver hardware of the source, relays, destination and eavesdropper is not perfect.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Analysis of Probability of Non-zero Secrecy Capacity for Multi-hop Networks in Presence of Hardware Impairments over Nakagami-m Fading Channels

Phu¹,

Dang²,

Tran³

et al. 2016

RADIOENGINEERING

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Secure mm‐Wave communications with imperfect hardware and uncertain eavesdropper location

Mashdour

Moradikia

Yeoh

2020

Trans Emerging Tel Tech

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This article examines the secrecy performance of millimeter-wave (mm-Wave) communications with imperfect hardware and uncertain eavesdropper (Eve) location. We consider a multiple-antenna source communicating with a single-antenna destination using masked beamforming to transmit the information signals with artificial noise (AN) in the presence of a passive Eve. For this system, we derive new expressions for the secrecy outage probability (SOP) and secrecy throughput with mm-Wave multipath propagation under slow-fading channel conditions and hardware imperfections. Based on this, optimal power allocation (OPA) solutions are derived for the information and AN signals aimed at minimizing the SOP and maximizing the secrecy throughput. Our results reveal that it is non-trivial to achieve an OPA solution for the general scenario of imperfect hardware. We also highlight that our proposed masked beamforming with OPA scheme significantly enhances the secrecy throughput compared with the benchmark schemes of maximal-ratio transmission and equal power allocation.

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How much does I/Q Imbalance affect Secrecy Capacity?

Cited by 25 publications

References 15 publications

Optimal Power Allocation for OFDMA Systems under I/Q Imbalance

Optimal Power Allocation for OFDMA Systems under I/Q Imbalance

Analysis of Probability of Non-zero Secrecy Capacity for Multi-hop Networks in Presence of Hardware Impairments over Nakagami-m Fading Channels

Secure mm‐Wave communications with imperfect hardware and uncertain eavesdropper location

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