Transmitting/receiving apparatus and method for packet retransmission in a mobile communication system

摘要

The modulation symbols in a region (1) having high error probability, is converted into modulation symbols in a region (3) having low error probability, by using 16 quadrature amplitude modulation (QAM) or 64 QAM scheme. The modulation symbols in a region (2) having low error probability, are converted into different modulations to generate re-transmission modulation symbols. Independent claims are also included for the following: (1) coded bit retransmission apparatus; (2) coded bit retransmission method; (3) coded bit receiving method; and (4) coded bit receiving apparatus.