Reception of a signal modulated according to a multilevel coding technique

Method for the decoding of a signal modulated according to a multi-level coding technique, comprising at least two coding levels, each having a distinct noise robustness,

• said signal comprising a plurality of symbols each comprising at least one bit, assigned to one of said coding levels,
• said method comprising at least one iteration of decoding comprising successive steps of decoding each of said bits received, at least one of said decoding steps taking account of the result of said at least one preceding step of decoding if any, wherein said bits ({tilde over (b)}3i, {tilde over (b)}2i, {tilde over (b)}1i) are decoded in a predetermined order taking account of the robustness of said levels, the bit or the bits assigned to the coding level that have the greatest noise robustness, called the most robust level, being decoded first, and wherein said method comprises at least two successive decoding iterations.

Device for the reception of a signal modulated according to a multi-level coding technique, comprising at least two coding levels each having a distinct noise robustness, said signal comprising a plurality of symbols each comprising at least one bit, assigned to one of said coding levels,

• said device comprising decoding means implementing a successive decoding of each of said bits ({tilde over (b)}3i, {tilde over (b)}2i, {tilde over (b)}1i) received, the decoding of at least one of said bits received taking account of the result of said at least one preceding decoding operation if any, wherein said decoding means decode said bits in a predetermined order taking account of the robustness of said levels, the bit or the bits assigned to the coding level that have the greatest noise robustness, called the most robust level, being decoded first, and wherein said decoding means achieve at least two successive decoding iterations.

System for the coding/decoding of a signal comprising a plurality of symbols each comprising at least one bit, wherein the system comprises at least one coding device enabling the modulation of said signal according to a multi-level coding technique, comprising at least two coding levels each having a distinct noise robustness, each of said bits being assigned to one of said coding levels, at least one decoding device comprising decoding means implementing a successive decoding of each of said received bits, the decoding of at least one of said received bits taking account of the result of at least one previous decoding if any, said decoding means decoding said bits in a predetermined order taking account of the robustness of said levels, the bit or bits assigned to the coding level that show the greatest noise robustness, called the most robust level, being decoded first, and said decoding means performing at least two successive decoding iterations.