Date Added: Dec 2009
Adoption of relay stations has been commonly accepted as a key technique for future IMT advanced 4G systems to improve the link performance. While study in relay systems is often carried out for individual users independently, in this paper, the authors present a design termed as relay based multi-user cooperative communication specifically for the uplink of 4G systems. In this system, data streams from multiple users are coded at the relay with an invertible matrix in finite field. These coded data, with information of one user being spread into other data streams, are forwarded by the RS to the Base Station (BS).