Interference Cancellation With Jointly Optimized Transceivers in Multiuser Multicellular Networks

Abstract

We propose novel jointly optimized transceivers for multiuser multicellular networks for both the uplink and the downlink. The optimization is based on minimizing the total mean square error at each base station given that out-of-cell precoders and the cross-channel information for the weaker interferers are not known. As the transceivers are jointly optimized at the base stations, the proposed schemes do not require multiple feedback iterations between the base stations and the users; thus, significantly reducing the overhead. We also investigate the performance considering a cooperation scheme and propose optimization for noncooperative users. We show that our proposed optimized transceivers outperform the existing schemes even with imperfect channel estimations.