I/Q Imbalance in Two-Way AF Relaying: Power Allocation and Performance Analysis
Paper in proceeding, 2014

We investigate the performance of dual-hop two-way amplify-and-forward (AF) relaying in the presence of in-phase 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 analytically investigate 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 relaying systems, which cannot be avoided by simply improving the channel conditions.


Jingya Li

Chalmers, Signals and Systems, Communication, Antennas and Optical Networks

Michail Matthaiou

Chalmers, Signals and Systems, Signal Processing and Biomedical Engineering

Tommy Svensson

Chalmers, Signals and Systems, Communication, Antennas and Optical Networks

IEEE International Conference on Communications, ICC 2014, Sydney, Australia

5042-5048 6884120
978-147992003-7 (ISBN)

Areas of Advance

Information and Communication Technology

Subject Categories


Signal Processing





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