Generalized Schur Decomposition-Based Two-Way Relaying for Wireless MIMO Systems
Hyun Jong Yang, Joohwan Chun · 2008
Deploying relay stations improves the signal-to- interference and noise ratio (SINR) by making a Pico cell environment. Nonetheless, a critical problem associated with deploying RS is additional resource consumption, which reduces the actual transmission rate. Two-way relaying schemes that use physical layer network coding (PNC) reduce the additional resource consumption and thereby improve the transmission rate. In this paper we propose a novel two-way relaying scheme for coded multiple-input multiple-output (MIMO) systems. The proposed scheme involves generalized Schur decomposition-based preceding and successive interference cancellation (SIC). By using the generalized Schur decomposition, orthogonal preceding matrices that minimize the transmit power can be applied, resulting in an improved transmission rate. We have evaluated the proposed system by comparing its transmission rate with that of several conventional schemes.