Relay Selection in Multiuser Two-Way Cooperative Relaying Systems
In this paper, the authors study a Relay Selection (RS) problem in multi-user two-way cooperative relaying systems. They consider a more practical scenario in which multiple users, multiple relays and a single destination are involved in the two-way network. In this paper, the Code Division Multiple Access (CDMA) system with non-orthogonal spreading sequences is employed to handle the multiuser interference. Relay selection based on maximizing the SINR of the worse link is proposed in this research. Besides, aiming at mitigating the interference, they consider the design of linear filter at each relay such that the minimum SINR of the worst link in the two-way transmission is maximized.