Patent ID: 7336733

Claim:
A decoding apparatus comprising: reception means for receiving data on a dedicated physical control channel and data on a dedicated physical data channel, which are coded into a complex code of a single system which is to be transmitted as an uplink signal from a mobile unit to a base station in a 3rd generation cell phone system, said complex code including a quadrature code representation of Transport Format Combination Indicator (TFCI) information contained within said control channel data; TFCI decoding characteristic feedback means for using quadrature correlation characteristics of said quadrature code to determine TFCI decoding characteristics of a coded TFCI code on the dedicated physical control channel; and dedicated physical data channel correcting means for performing data correction for the dedicated physical data channel on the basis of a determination result on the TFCI decoding characteristics, and wherein said TFCI decoding characteristic feedback means comprises dedicated channel control means for controlling a dedicated channel, outputting a TFCI count corresponding to a service, and outputting a decoding parameter corresponding to a received TFCI value, data correcting means for processing a correction value calculated from TFCI decoding characteristics of a dedicated physical control channel with respect to data on a dedicated physical data channel which is received from a mobile unit, de-interleave rate de-matching means for channel-decoding an output from said data correcting means on the basis of a decoding parameter from said dedicated channel control means, and error correcting/decoding means for decoding an output from said deinterleave rate dematching means while performing error correction for the output to obtain decoded data on the dedicated physical data channel, and said dedicated physical data channel correcting means comprises symbol data determining means for extracting/separating a TFCI code from data on a dedicated physical control channel, soft decision TFCI decoding means for TFCI-decoding a TFCI code output from said symbol data determining means on the basis of a TFCI count from said dedicated channel control means, transmitting an obtained TFCI value to said dedicated channel control means, and outputting correlation values with a Walsh quadrature vector at the time of TFCI decoding, correlation value characteristic storage means for sequentially storing correlation values output from said soft decision TFCI decoding means, and correction value calculating means for determining TFCI decoding characteristics from a plurality of correlation values stored in said correlation value characteristic storage means, calculating the correction value, and outputting the correction value to said data correcting means.