Abstract: A probabilistic signal point shaping device comprises circuitry configured to map data blocks of input bits of an input bit stream onto mapping symbols, wherein said mapping symbols are distributed according to a predetermined probability distribution and represented by complex-valued signal points or non-uniformly spaced amplitude levels, assign bit labels to said mapping symbols, determine redundancy bits from the bits of said bit labels, transform said redundancy bits into a redundancy rule, and apply the redundancy rule to the mapping symbols to obtain output symbols.

Abstract: A transmission apparatus including a FEC encoder configured to obtain payload data structured as information words each having a predetermined first number of information bits and to encode information words having a second number of information bits into FEC code words each having a predetermined code word length.

Abstract: Circuitry configured to map data blocks of input bits of a first input bit stream onto first mapping symbols distributed according to a first probability distribution and represented by first signal points, analyze the probability of occurrence of the first signal points representing the first mapping symbols and/or earlier final mapping symbols, determine a second probability distribution to be applied for mapping second input bits of a second input bit stream onto second mapping symbols, said second probability distribution determined based on the analyzed probability of occurrence to obtain a desired final probability distribution of final mapping symbols, map data blocks of input bits of a second input bit stream onto second mapping symbols, wherein said second mapping symbols are distributed according to said second probability distribution and represented by second signal points, and combine the first mapping symbols and the second mapping symbols into the final mapping symbols.

Abstract: Circuitry configured to map data blocks of input bits of a first input bit stream onto first mapping symbols distributed according to a first probability distribution and represented by first signal points, analyze the probability of occurrence of the first signal points representing the first mapping symbols and/or earlier final mapping symbols, determine a second probability distribution to be applied for mapping second input bits of a second input bit stream onto second mapping symbols, said second probability distribution determined based on the analyzed probability of occurrence to obtain a desired final probability distribution of final mapping symbols, map data blocks of input bits of a second input bit stream onto second mapping symbols, wherein said second mapping symbols are distributed according to said second probability distribution and represented by second signal points, and combine the first mapping symbols and the second mapping symbols into the final mapping symbols.

Abstract: A transmission apparatus including a FEC encoder configured to obtain payload data structured as information words each having a predetermined first number of information bits and to encode information words having a second number of information bits into FEC code words each having a predetermined code word length.

Abstract: A probabilistic signal point shaping device comprises circuitry configured to map data blocks of input bits of an input bit stream onto mapping symbols, wherein said mapping symbols are distributed according to a predetermined probability distribution and represented by complex-valued signal points or non-uniformly spaced amplitude levels, assign bit labels to said mapping symbols, determine redundancy bits from the bits of said bit labels, transform said redundancy bits into a redundancy rule, and apply the redundancy rule to the mapping symbols to obtain output symbols.