Transmit methods for CCFI/PCFICH in a wireless communication system

A method for transmitting a control channel format indicator, the method comprising the steps of:

• mapping a plurality of two-bit CCFI (Control Channel Format Indicator) into one selected from a first codebook and a second codebook, with the plurality of CCFI being selected from a group consisting of “00”, “01”, “10” and “11”, and with the first codebook comprising codewords selected from a group consisting of component codewords “000”, “011”, “101” and “110” corresponding to a designated CCFI and the second codebook comprising codewords selected from a component codeword group consisting of component codewords “111”, “100”, “010” and “001” corresponding to the designated CCFI;
• generating a sequence of codewords selected from either the first codebook or the second codebook by repeating the selected component codeword for predetermined times, with the predetermined times being determined by a flooring of quotient └4K/3┘, where K is a number of resource units occupying one Orthogonal Frequency Division Multiplexing (OFDM) symbol and two neighboring subcarriers;
• generating a codeword by concatenating the sequence of the selected component codewords with the original designated CCFI bits;
• and
• transmitting the codeword carrying information of CCFI.