Patent ID: 7272191
Filing Date: 2007-09-18
Classification: H04L

Abstract:
1. A method of producing at least one sequence of modulation symbols for transmission, each modulation symbol consisting of a predefined number of bits, the method comprising the steps of: providing at least one block of coded information bits to be transmitted; arranging the coded information bits of said block to form at least one first sequence of bits in which each information bit is assigned to a respective one of at least two bit groups, including a first group of bits located in at least one first bit position within said predefined number of bits and a second group of bits located in at least one second bit position within said predefined number of bits and having a higher probability of transmission error than the bits of the first group; interleaving the bits of each first sequence to form a respective second sequence of bits while preserving the assignment of the information bits to said bit groups; mapping each second sequence of bits onto a respective sequence of modulation symbols; and