Improved single-user detector for WCDMA systems based on Griffiths´ algorithm

An introduction to CDMA cellular systems is given. The usage of mobile Internet and other mobile data communication will require increased capacity of cellular systems. One group of methods to achieve this is the interference cancellation (IC) receivers. Some of the available interference cancellation algorithms are presented. Among them, the Griffiths´ algorithm used to adapt the despreader filter is chosen for a more detailed study. A number of problems related to the WCDMA standard and the fading radio channel are identified and a new receiver structure is proposed to solve these problems. The convergence properties and the bit error rate of this receiver are studied assuming perfectly known radio channels