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Analysis and compensation of I/Q imbalance in amplify-and-forward cooperative systems

Qi, J., Aissa, S. and Alouini, M.-S. (2012) Analysis and compensation of I/Q imbalance in amplify-and-forward cooperative systems. In: 2012 IEEE Wireless Communications and Networking Conference (WCNC). IEEE, pp. 215-220. ISBN 9781467304368

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To link to this item DOI: 10.1109/WCNC.2012.6214150


In this paper, dual-hop amplify-and-forward (AF) cooperative systems in the presence of in-phase and quadrature-phase (I/Q) imbalance, which refers to the mismatch between components in I and Q branches, are investigated. First, we analyze the performance of the considered AF cooperative protocol without compensation for I/Q imbalance as the benchmark. Furthermore, a compensation algorithm for I/Q imbalance is proposed, which makes use of the received signals at the destination, from the source and relay nodes, together with their conjugations to detect the transmitted signal. The performance of the AF cooperative system under study is evaluated in terms of average symbol error probability (SEP), which is derived considering transmission over Rayleigh fading channels. Numerical results are provided and show that the proposed compensation algorithm can efficiently mitigate the effect of I/Q imbalance.

Item Type:Book or Report Section
ID Code:33444
Uncontrolled Keywords:AF cooperative protocol; I/Q imbalance compensation; Rayleigh fading channel; amplify and forward communication; in-phase imbalance; quadrature phase imbalance; relay node; signal detection; source node; symbol error probability; cooperative systems; fading; phase shift keying; relays; signal to noise ratio; system performance

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