Patent ID: 7068638

Claim:
A method for decoding a variable length TFCI (Transport Format Combination Indicator) bits for a DSCH (Downlink Shared Channel) or for a DCH (Dedicated Channel) in a reception device for a mobile communication system, which receives a signal of encoded TFCI bits for the DSCH or the TFCI bits for the DCH, encoded with orthogonal codes, comprising the steps of: determining inverse fast Hadamard transform (IFHT) stages based on the length of the TFCI bits; inserting “0”s in the received signal at a predetermined positions to form a zero-inserted signal; sequentially performing inverse fast Hadamard transform on the zero-inserted signal up to the determined IFHT stages; and after completion of the inverse fast Hadamard transform by the determined IFHT stages, outputting index of an orthogonal code of which correlation value is most large than other correlation value achieved by the determined IFHT stage as decoded TFCI bits.