The Research Of Blind Multiuser Detection Based On Variable Step-size Theory

With the application of the third generation mobile system, CDMA as the main access method is developing quickly these years. However, multiple access interference and near-far effect which CDMA possesses restrict system capability, and multiuser detection is the main measure to resolve these.As one of the most important technologies of CDMA, Multiuser Detection (MUD) technique has a good performance of resisting MAI and near-far effect through the use of adequate cross correlations among spreading codes of users to detect the signals. But frequent to send the training sequence restricts the use of MUD seriously. So recently, blind multiuser detection without requiring training sequences and information of interference users has attracted considerable attention and significant researches.The major works of this paper are summarized as follow:1. Briefly looks back the development of the third generation mobile...