Method for transmitting a digital signal between at least two transmitters and at least one receiver, using at least one relay, and corresponding program product and relay device

A non-transient computer-readable carrier comprising a computer program product executable by a processor, wherein the product comprises program code instructions for implementing a method for transmitting a digital signal between at least two transmitters and at least one receiver, implementing a concatenation of at least two codes, wherein the method comprises:

• encoding, in said transmitters, delivering at least two first code words;
• sending said at least two first code words;
• receiving, in at least one relay, at least two of said first code words, called intermediate code words;
• interleaving at least one part of bits of said intermediate code words delivering interleaved bits;
• encoding said interleaved bits, in said at least one relay, delivering at least one second code word taking account of said intermediate code words;
• and
• sending said at least one second code word by said at least one relay,
• so as to make it possible, in said at least one receiver, to carry out an iterative decoding taking account of said first code words and then a redundancy formed by said at least one second code word.

A relay device comprising:

• means for receiving at least two first code words, called intermediate code words sent out by at least two transmitter devices and/or at least one other relay device;
• means for interleaving at least one part of bits of said intermediate code words delivering interleaved bits;
• means for encoding said interleaved bits so as to form at least one second code word taking account of said intermediate code words;
• means for sending said second code word or code words,
• so as to make it possible, in at least one receiver, to carry out an iterative decoding taking account of said first code words and then a redundancy formed by said at least one second code word.