Patent ID: 6895038

Claim:
A base transceiver station for use in communication with a plurality of radio mobile station apparatuses based on code division multiple access, comprising a reception signal interference canceller device, the interference canceller device comprising: a slot configuration circuit for dividing a reception signal at certain time intervals, such that one of the divided signals partially overlaps another divided signal at a signal dividing point, converting the divided signal into signals at a faster cycle and converting into a signal having a serial slot configuration as many the converted signals as stages for stage processing on a signal identical to the converted signals at a faster cycle; a correlation circuit for performing a despreaditig process on the signal having the slot configuration; a stage addition circuit for adding the number of stages for stage processing to the despread signals; a re-spreading circuit for performing a re-spreading process on the signals which have been subjected to the stage addition; a synthesis circuit for performing a process of synthesizing all of the spread signals which have been subjected to the re-spreading process to generate replica signals; and a subtraction process circuit for performing a subtraction process between the replica signals and the reception signals, wherein signals obtained by subtraction process for the replica signals and the reception signals are repeatedly fed back to the correlation circuit thereby to eliminate an interference component.