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

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 wi...

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Bibliographic Details
Published in2012 IEEE Wireless Communications and Networking Conference (WCNC) pp. 215 - 220
Main Authors Jian Qi, Aissa, S., Alouini, M.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.04.2012
Subjects
Cooperative systems
Fading
Phase shift keying
Relays
Signal to noise ratio
System performance
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ISBN9781467304368
1467304360
ISSN1525-3511
DOI10.1109/WCNC.2012.6214150

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Summary: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.
ISBN:9781467304368
1467304360
ISSN:1525-3511
DOI:10.1109/WCNC.2012.6214150