A novel uplink receiver for GSM/EDGE systems with Orthogonal Sub Channel feature

The increasing demand for traffic capacity of the GSM/EDGE Radio Access Networks (GERAN) induced the Third Generation Partnership Project (3GPP) to examine the Orthogonal Sub Channel (OSC) transmission scheme. This new feature aims at doubling the cell capacity by multiplexing two co-cell users on the same radio resource. This work presents a new two-stage receiver specifically designed for the uplink GSM-OSC system. The proposed strategy relies on two optimum interference mitigation filters jointly derived for the multiplexed users. The filtered signals are then processed by a multi user detector that recovers the transmitted sequences. The proposed algorithm show a significant performance gain with respect to existing interference cancellation receivers.