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

Jingya Li (Institutionen för signaler och system, Kommunikationssystem) ; Michail Matthaiou (Institutionen för signaler och system, Signalbehandling) ; Tommy Svensson (Institutionen för signaler och system, Kommunikationssystem)
IEEE International Conference on Communications, ICC 2014, Sydney, Australia p. 5042-5048. (2014)
[Konferensbidrag, refereegranskat]

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.

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Denna post skapades 2014-01-22. Senast ändrad 2015-03-30.
CPL Pubid: 192966


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