Abstract: The invention has the object of determining the optimum weighting coefficient for each channel in a subtractive interference canceller (IC). A weighting coefficient determining method in a subtractive interference canceller for handling digital radio communications, characterized in that complex weighting coefficients are set so as to minimize the power of an interference cancellation residual signal for each channel in each stage.

Abstract: In a multi-access communications network, an interference cancellation (IC) method is used to reduce the interference between users and help increase the capacity of the network. A window is used in the IC method to cancel the interference on a user signal from other user signals within the window. The window then slides to process a different part of the user signals. This window slide may be accomplished using a full or a partial slide of the window. The present invention achieves a very small delay for the interference cancellation of user signals using a multi-stage interference cancellation method.