On Forming the Detection Set for Multicell Multiuser Detection in Narrowband Cellular Systems

We previously presented a joint maximum likelihood multiuser detection (JML-MUD) technique that achieves single cell clusters in narrowband systems by reducing the effects of interference from other-cell cochannel users. Since no bandwidth expansion is needed, the capacity becomes comparable to that of wideband systems. In our initial work we used the instantaneous power received from each user at the desired base station to rank and select users for the detection set. In this work, we propose the use of the average reception power over fading and compare the resulting bit error rate to that of instantaneous power as the selection criterion. In addition, we investigate the effect of detection set size on the performance of the system. This allows a tradeoff between the computational cost of adding users to the detection set and the improvement it makes to the performance of the system.