Selective partial parallel interference cancellation for personal CDMA communications

This paper deals with a cancellation multiuser detector for CDMA communication systems. Proposed receiver is supposed to be used at the end of up-link channel, leading to consider multipath fading phenomena. Proposed receiver approach consists in performing a weighted selective cancellation of the co-channel interfering signals, divided in two different groups according to the received power level: signals exceeding a suitable threshold are considered more reliable and, therefore, cancelled with a higher weight. In comparison with previously proposed cancellation receivers described detector shows remarkable improvement of the resistance to multiple access interference and low computational complexity, linear in the number of users.