Multiuser Detection Summary for 6.975 EECS Graduate Seminar in Communications

The multiuser detection problem applies when we are sending data on the uplink channel from a handset to a base station. The base station must demodulate and decode signals from K−1 interfering handsets. A related problem known as interference cancellation arises on the down-link channel from the base station to the handset in which the handset must separate the signal intended for it, from the signals that the base station intends for other handsets in the cell. Methods for directly mitigating interference from neighboring cells have generally not been addressed, probably because of the current practical difficulties of sharing large quantities of time sensitive information between different cells. There is an enormous literature on multiuser detection, but a few resources may be helpful. The main resource is Verdu’s book [Verdu 1998]. The Fall 11/8/2000 presentation by C. Emre Koksal, entitled “Linear Multiuser Receivers” for this seminar is quite helpful.