Patent ID: 7443829

Claim:
A CDMA based wireless base station comprising: means for receiving a channel request from a mobile terminal; means for sending an acknowledgement including an assigned code to the mobile terminal; means for determining the relative transmission timing of the mobile terminal; means for determining a cross-correlation parameter associated with the requesting mobile terminal assigned code and transmission timing and another mobile terminal communicating with the base station and having another code and transmission timing; means for receiving data from the requesting mobile terminal using said assigned code and transmission timing; and means for cancelling interference on said received data caused by data received from said other mobile terminal on said other code and other transmission timing, said interference cancellation using the cross-correlation parameter, wherein the means for interference cancelling comprises means for calculating an interference signal associated with the other mobile terminal and means for subtracting this from the received data signal in order to recover the data signal without said interference signal, and wherein an accuracy parameter is calculated for the interfering signal, and wherein a weight is applied to said signal prior to subtraction from the de-spread signal dependent on said accuracy parameter.