Patent ID: 7688913
Filing Date: 2010-03-30
Classification: H04B,H04L

Abstract:
1. A data transmission method comprising the steps of: transmitting a 16QAM symbol based on a string of four bits to a data reception apparatus in a first transmission; receiving a retransmission request from said data reception apparatus; swapping bit positions of said string of four bits within another 16QAM symbol to produce an arranged string of four bits; and transmitting the other 16QAM symbol based on said arranged string of four bits to said data reception apparatus in a retransmission, wherein: said swapping step swaps a bit position of a first bit of said string of four bits for a bit position of a fourth bit of said string of four bits, and swaps a bit position of a second bit of said string of four bits for a bit position of a third bit of said string of four bits.