Patent ID: 7099298

Claim:
A method of transmitting S sub-codes C i (i=0, 1, 2, . . . , S−1) in a transmitter having a sub-code generator for generating the sub-codes C i from a physical layer packet (PLP) information stream using quasi-complementary turbo codes in a CDMA (Code Division Multiple Access) mobile communication system, the method comprising the steps of: initially transmitting a first sub-code C 0 and sequentially transmitting the following sub-codes, using quasi-complementary turbo codes, each time a retransmission request is received for the initial transmission or a previous retransmission; and transmitting the first sub-code C 0 if a retransmission request is received for a last sub-code C S−1 , using quasi-complementary turbo codes, and then sequentially transmitting the following sub-codes each time a retransmission request is received.