Patent ID: 6690751
Filing Date: 2004-02-10
Classification: H04L

Abstract:
A method for demodulating and decoding a block of received digital information consisting of a number of subblocks, comprising the steps of:selecting one of a predefined number of demodulation methods for demodulating each subblock, demodulating each subblock with the demodulation method selected for it and combining the subblocks constituting a block of digital information between their demodulation and the decoding of the block of digital information, â€ƒwherein soft decoding is used to decode the block of digital information, so that each subblock is converted to a sequence of soft decoding values associated with certain probabilities of allowed state transitions in the decoding process, for each subblock it is determined, after its demodulation, whether the correct demodulation method was selected for it and a subblock for which it is found that the correct demodulation method was not selected is converted to a sequence of neutral soft decoding values indicating equal probabilities for all allowed state transitions in the decoding process.