TY - GEN
T1 - Outage probability under I/Q imbalance and cascaded fading effects
AU - Boulogeorgos, Alexandros Apostolos A.
AU - Sofotasios, Paschalis C.
AU - Selim, Bassant
AU - Muhaidat, Sami
AU - Karagiannidis, George K.
AU - Valkama, Mikko
N1 - Funding Information:
This work was supported by the Finnish Funding Agency for Technology and Innovation (Tekes) under the project entitled Energy-Efficient Wireless Networks and Connectivity of Devices-Systems (EWINE-S), by the Academy of Finland under the projects No. 284694 and No. 288670 and by Khalifa University
Publisher Copyright:
© 2016 IEEE.
PY - 2016/6/27
Y1 - 2016/6/27
N2 - Direct-conversion architectures (DCA) can offer highly integrated low-cost hardware solutions to communication transceivers. However, DCA devices are sensitive to radio frequency (RF) imperfections such as amplifier non-linearities, phase noise and in-phase/quadrature-phase imbalances (IQI), which typically lead to a severe degradation of the performance of such systems. Motivated by this, we quantify and evaluate the impact of RF IQI on wireless communications in the context of cascaded fading channels. Novel closed form expressions are derived for the corresponding outage probability for the case of ideal transmitter (TX) and receiver (RX), ideal TX and I/Q imbalanced RX, I/Q imbalanced TX and ideal RX, and joint I/Q imbalanced TX/RX. The offered analytic results have a relatively convenient algebraic representation and their validity is extensively justified through simulations. Based on these, it is shown that cascaded fading leads to considerable degradation in the system performance and that assuming ideal RF front-ends at the TX and RX induces non-negligible errors in the outage probability that can exceed 20% in several communication scenarios. We further demonstrate that the effects by cascaded multipath fading conditions are particularly severe, as they typically result to considerable performance losses of around or over an order of magnitude.
AB - Direct-conversion architectures (DCA) can offer highly integrated low-cost hardware solutions to communication transceivers. However, DCA devices are sensitive to radio frequency (RF) imperfections such as amplifier non-linearities, phase noise and in-phase/quadrature-phase imbalances (IQI), which typically lead to a severe degradation of the performance of such systems. Motivated by this, we quantify and evaluate the impact of RF IQI on wireless communications in the context of cascaded fading channels. Novel closed form expressions are derived for the corresponding outage probability for the case of ideal transmitter (TX) and receiver (RX), ideal TX and I/Q imbalanced RX, I/Q imbalanced TX and ideal RX, and joint I/Q imbalanced TX/RX. The offered analytic results have a relatively convenient algebraic representation and their validity is extensively justified through simulations. Based on these, it is shown that cascaded fading leads to considerable degradation in the system performance and that assuming ideal RF front-ends at the TX and RX induces non-negligible errors in the outage probability that can exceed 20% in several communication scenarios. We further demonstrate that the effects by cascaded multipath fading conditions are particularly severe, as they typically result to considerable performance losses of around or over an order of magnitude.
UR - https://www.scopus.com/pages/publications/84979284915
U2 - 10.1109/ICT.2016.7500398
DO - 10.1109/ICT.2016.7500398
M3 - Conference contribution
AN - SCOPUS:84979284915
T3 - 2016 23rd International Conference on Telecommunications, ICT 2016
BT - 2016 23rd International Conference on Telecommunications, ICT 2016
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 23rd International Conference on Telecommunications, ICT 2016
Y2 - 16 May 2016 through 18 May 2016
ER -