Patent ID: 7263118

Claim:
An interference canceller in a mobile communication system, comprising: an interference cancellation section comprising a first interference cancellation unit including a plurality of first detectors connected in parallel for receiving a baseband signal, a signal selector for comparing SIR (signal to interference ratio) measurement values respectively measured by the first detectors with a predetermined target SIR and selecting regeneration signals that have SIR measurement values greater than the target SIR and which are regenerated from the first detectors, and a subtractor for subtracting the regeneration signals selected by the signal selector from the baseband signal, the interference cancellation section receiving the baseband signal, and a final decision unit for receiving signals from the interference cancellation section, and performing a hard bit decision, wherein the first detector comprises: a plurality of first fingers, each first finger comprising a despreader for despreading corresponding path signals of received signals to determine respective channel estimates, and a regenerator for using a soft bit decision value and each of the channel estimates to generate the regeneration signals; a first maximal ratio combiner (MRC) for using the channel estimates to combine the signals despread by the first fingers with a maximal ratio and perform a soft bit decision on the combined signals to determine the soft bit decision value; and a SIR measurer for using the soft bit decision value output from the first MRC and the channel estimates to determine the SIR measurement value of the received signals.