On Two-way Communications for Cooperative Multiple Source Pairs Through a Multi-antenna Relay
Abstract
We study amplified-and-forward (AF)-based two-way relaying (TWR) with multiple source pairs, which are exchanging information through the relay. Each source has single antenna and the relay has multi-antenna. The optimal beamforming matrix structure that achieves maximum signal-to-interference-plus-noise ratio (SINR) for TWR with multiple source pairs is derived. We then present two new non-zero-forcing based beamforming schemes for TWR, which take into consideration the tradeoff between preserving the desired signals and suppressing inter-pair interference between different source pairs. Joint grouping and beamforming scheme is proposed to achieve a better signal-to-interference-plus-noise ratio (SINR) when the total number of source pairs is large and the signal-to-noise ratio (SNR) at the relay is low.
Cite
@article{arxiv.1012.2164,
title = {On Two-way Communications for Cooperative Multiple Source Pairs Through a Multi-antenna Relay},
author = {Chin Choy Chai and Chau Yuen},
journal= {arXiv preprint arXiv:1012.2164},
year = {2010}
}