Method and device for turbo demodulation, iterative demapping and iterative decoding

A method for demodulating received symbols using a turbo-demodulation scheme comprising an iterative de-mapping and wherein an iterative channel decoder is used in the turbo-demodulation scheme, characterized in that the iterative channel decoder performs a first iterative process named iterative decoding process, the turbo-demodulation performing a second iterative process named iterative demodulation and decoding process, at each iteration of the second iterative process, the iterative channel decoder executing plural iterations in order to decode bits from which symbols are derived from, and wherein the method comprises the steps executed by the iterative channel decoder of:

• memorizing at the end of the iterations of the first iterative process, the variables used internally by the iterative channel decoder,
• receiving from a controller messages indicating to the iterative channel decoder that iterative channel decoder has to read the memorized variables at the following iteration of the second iterative process or to reset the memorized variables,
• reading the memorized variables at the following iteration of the second iterative process if a messages indicating to the iterative channel decoder that iterative channel decoder has to read the memorized variables at the following iteration of the second iterative process is received,
• and in that the turbo-demodulation scheme comprises a de-interleaving process based on a set of code blocks and the message further comprises a block identifier within the set of code blocks of the next block to be decoded.