TY - JOUR
T1 - Secrecy analysis of uplink IM-OFDMA systems in the presence of IQ imbalance
AU - Alaca, Ozgur
AU - Althunibat, Saud
AU - Yarkan, Serhan
AU - Miller, Scott L.
AU - Qaraqe, Khalid A.
N1 - Publisher Copyright:
© 1967-2012 IEEE.
PY - 2023/11/1
Y1 - 2023/11/1
N2 - This article introduces the secrecy analysis of the index modulation-based orthogonal frequency division multiple access (IM-OFDMA) schemes by considering the in-phase and quadrature imbalance (IQI) presence at the users' RF front ends. In particular, by assuming the existence of an eavesdropper, the secrecy performance of the considered uplink multiple-Access system is investigated through the strictly positive secrecy capacity and secrecy outage probability, and closed-form expressions are derived for both quantities. Moreover, the secrecy performance is conducted regarding IQI compensation based on a preamble-based estimation method. Further, analysis of the impact of the different parameters of IM-OFDMA, IQI, and estimation method is included via analytical and simulation-based results. The results reveal that IM-OFDMA is more reliable in secrecy performance than OFDMA, regardless of whether IQI is present. Also, IQI compensation can lead to a better secrecy performance compared to the case of no IQI.
AB - This article introduces the secrecy analysis of the index modulation-based orthogonal frequency division multiple access (IM-OFDMA) schemes by considering the in-phase and quadrature imbalance (IQI) presence at the users' RF front ends. In particular, by assuming the existence of an eavesdropper, the secrecy performance of the considered uplink multiple-Access system is investigated through the strictly positive secrecy capacity and secrecy outage probability, and closed-form expressions are derived for both quantities. Moreover, the secrecy performance is conducted regarding IQI compensation based on a preamble-based estimation method. Further, analysis of the impact of the different parameters of IM-OFDMA, IQI, and estimation method is included via analytical and simulation-based results. The results reveal that IM-OFDMA is more reliable in secrecy performance than OFDMA, regardless of whether IQI is present. Also, IQI compensation can lead to a better secrecy performance compared to the case of no IQI.
KW - IM-OFDMA
KW - IQ imbalances
KW - Physical layer security
KW - Secrecy outage probability
KW - Strictly positive secrecy capacity
UR - http://www.scopus.com/inward/record.url?scp=85162706615&partnerID=8YFLogxK
U2 - 10.1109/TVT.2023.3285209
DO - 10.1109/TVT.2023.3285209
M3 - Article
AN - SCOPUS:85162706615
SN - 0018-9545
VL - 72
SP - 14411
EP - 14425
JO - IEEE Transactions on Vehicular Technology
JF - IEEE Transactions on Vehicular Technology
IS - 11
ER -