Device and method for transmitting data using convolutional turbo code (ctc) encoder in mobile communication system

A method for transmitting data using a convolutional turbo code (CTC) encoder from a transmitting side in a mobile communication system, the method comprising:

• a first encoding to output first encoded bits, by encoding input data bits, which have been input through two input ports of the CTC encoder;
• interleaving the input data bits using four CTC interleaver parameters P0, P1, P2 and P3 corresponding to sizes of the input data bits;
• a second encoding to output second encoded bits, by encoding the interleaved data bits;
• and
• selectively transmitting, to a receiving side, the input data bits, the first encoded bits and the second encoded bits, in accordance with a predetermined coding rate, wherein, with respect to the CTC interleaver parameters corresponding to the sizes of the input data bits, P0 is a relative prime number to N, which is ½ of the size of each of the input data bits, P2 has a value of N−1, and the difference between P1 and P2 is 1.