COMMUNICATION TERMINAL DEVICE, BASE STATION DEVICE, AND ACK/NACK INFORMATION TRANSMISSION METHOD

摘要

PROBLEM TO BE SOLVED: To enable to flexibly cope with traffic change, and also to aim at reduction of the power consumption for transmission and reception of ACK/NACK information, and reduction of hardware size.

SOLUTION: A control unit 155 sets up a spreading code used for despreading processing based on a signal which shows a spreading code and a process of ACK/NACK information which a base station device 200 assigns, in addition to the timing of despreading processing. A despreader 156 carries out despreading processing of the received signal of ACK information or NACK information by using a spreading code set up by the control unit 155, according to the timing set up by the control unit 155. A demodulator 157 demodulates an output signal of the despreader 156. An ACK/NACK judgment 158 judges whether the output signal of the demodulator 157 is ACK information, or it is NACK information.

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