Patent ID: 8316275

Claim:
A turbo decoding system of a Code Division Multiple Access (CDMA) mobile communication terminal to control transmission power of a base station based on reception quality of a reception signal measured according to a Cyclic Redundancy Check (CRC) judge result after an error correction by turbo decoding, comprising: a quality measuring unit which separately measures the reception quality for each of a number of decoding bits of the reception signal and a control section which controls for each of the number of decoding bits, based on the reception quality of a decoding bit count measured by the quality measuring unit, a transmission power control bit to control transmission power of the base station and to be inserted in a transmission signal and an iteration count of turbo decoding, wherein the control section controls the iteration count of turbo decoding if the reception quality of a given decoding bit of the number of decoding bits requiring highest reception performance satisfies a predetermined reception quality due to control of the transmission power control bit which is controlled based on the reception quality of the given decoding bit of the number of decoding bits requiring highest reception performance, wherein the control section controls, if the reception quality of the given decoding bit of the number of decoding bits requiring highest reception performance does not satisfy the predetermined reception quality, the transmission power control bit is controlled based on the reception quality of each of the number of decoding bits other than the given decoding bit.