FIELD: radio engineering, communication.
SUBSTANCE: invention relates to a coding method in a wireless mobile communication system. More specifically, the present invention relates to a convolutional turbo coding (CTC) method and a device for implementing the method. The method for CTC includes steps of encoding information bits A and B using a constituent encoder, and outputting parity sequences Y1 and W1, interleaving the information bits A and B using a CTC interleaver to obtain information bits C and D, and encoding the interleaved information bits C and D using the constituent encoder to obtain parity sequences Y2 and W2, interleaving the information bits A and B, the parity sequences Y1 and W1 and the parity sequences Y2 and W2, respectively, wherein the bits in at least one of a bit group consisting of the information bits A and B, a bit group consisting of the sequences Y1 and W1, and a bit group consisting of the sequences Y2 and W2 are alternately mapped to bits of constellation points with high reliability and low reliability and puncturing the interleaving result to obtain the encoded bit sequences.
EFFECT: high reliability of encoding with bit mapping of high order modulation.
12 cl, 7 dwg
