Iterative joint and interference nulling/ cancellation decoding algorithms for multi-group space time trellis coded systems

In this paper, we will propose and evaluate the performance of several decoding algorithms for multi-group space time trellis coded (MGSTTC) systems. By considering a single user who transmits simultaneously through K parallel space time trellis encoders, the system can provide high spectral efficiencies; transmit diversity advantages and coding gains. The system is analogous to synchronous multi-users each is transmitting a space time trellis code. The transmitter will divide the information stream and transmits from each encoder (called a group) simultaneously resulting in an increase in the transmitted data rates. The receiver will apply some multi-user detection (MUD) algorithms to detect and decode each group. The paper will focus on joint detection and interference nulling/cancellation algorithms.