Patent ID: 6973614
Filing Date: 2005-12-06
Classification: H03M,H04L

Abstract:
1. A method for channel coding in a GSM mobile radio system, wherein the channel coding uses recursive systematic codes and is performed at a transmitting end for transmission via a radio interface between a base station and a subscriber station, the method comprising the steps of: arranging voice information to be coded based on at least one of a sensitivity of the voice information to transmission errors and a priority associated with the voice information; subdividing the voice information into at least first and second voice information; performing a channel coding for the first voice information which, in a first coding step, uses error protection codes for a cyclic redundancy check and, in a second coding step, uses recursive systematic codes comprising a numerator polynomial and a denominator polynomial; performing a channel coding for the second voice information which uses recursive systematic codes comprising a numerator polynomial and a denominator polynomial; performing a channel decoding comprising successive nonrecursive individual steps at a receiving end; and performing post-processing based on the denominator polynomial after channel decoding with the numerator polynomial.