I/Q imbalance in two-way AF relaying: Power allocation and performance analysis

Jingya Li, Michail Matthaiou, Tommy Svensson

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)


We investigate the performance of dual-hop two-way amplify-and-forward (AF) relaying in the presence of inphase and quadrature-phase imbalance (IQI) at the relay node. In particular, the effective signal-to-interference-plus-noise ratio (SINR) at both sources is derived. These SINRs are used to design an instantaneous power allocation scheme, which maximizes the minimum SINR of the two sources under a total transmit power constraint. The solution to this optimization problem is analytically determined and used to evaluate the outage probability (OP) of the considered two-way AF relaying system. Both analytical and numerical results show that IQI can create fundamental performance limits on two-way relaying, which cannot be avoided by simply improving the channel conditions.
Original languageEnglish
Title of host publication2014 IEEE International Conference on Communications (ICC)
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
ISBN (Electronic)978-1-4799-2003-7
Publication statusPublished - Aug 2014


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