Patent ID: 6192067
Filing Date: 2001-02-20
Classification: H04B

Abstract:
A multistage interference canceller for cancelling interference as a communication system from an input signal, the interference canceller comprising:a plurality of despreading units inputted with an error signal and an interference replica signal to produce received symbol vector and an estimated channel value;a synthesis unit to synthesize said received symbol vector, an amplitude of the received symbol vector and an amplitude of the estimated channel value from each despreading unit, respectively;a decision unit to evaluate said received symbol vector by hard-soft decision according to a result of comparing the total amplitude of the received symbol vector and a total estimated channel value and output an information symbol vector; anda plurality of spreading units inputted with said information symbol vector and said interference replica signal to produce an interference residual signal and a new interference replica signal outputted to the next stage of the interference canceller.