Apparatus and method for up-link data communication

PURPOSE: A device for performing uplink data communication and a method therefor are provided to remove interference between mobile stations from receiving signals and channel values, and to estimate user information by removed results, thereby relatively increasing time for transceiving other data by reducing an RAP(Random Access Period). CONSTITUTION: Antennas(62,64,66-68) receive wireless signals. The first multi channel receiver(80) extracts receiving signals from the received wireless signals of the antennas(62,64,66-68). The first channel value estimator(84) estimates impulse responses of channels formed between mobile stations and the antennas(62,64,66-68) from the receiving signals, and outputs the estimated impulse responses as channel values. The first information estimator(82) removes interference between the mobile stations from the receiving signals and the channel values, and estimates user information by removed results.