Technische Universitat Munchen

Fabian Steiner

Patrick Schulte

Georg Böcherer

Georg BÖCHERER

A method (C) for converting a data signal (U), comprising (i) providing an input symbol stream (B) representative of the data signal (U), (ii) demultiplexing (DMX) the input symbol stream (B) to consecutively decompose the input symbol stream (B) into a number m of decomposed partial symbol streams (B_, . . . , B_m), (iii) applying on each of the decomposed partial symbol streams (B_, . . . , B_m) an assigned distribution matching process (DM_, . . . , DM_m), thereby generating and outputting for each decomposed partial symbol stream (B_, . . . , B_m) a respective pre-sequence (bn_, . . . , bn_m) or n_j symbols as an intermediate output symbol sequence, and (iv) supplying the pre-sequences (bn_, . . . , bn_m) to at least one symbol mapping process (BM) to generate and output a signal representative for a final output symbol sequence (S) as a converted data signal. Each of the distribution matching processes (DM_, . . . , DM_m) and the symbol mapping process (BM) are based on a respective assigned alphabet (ADM_, . . . , ADM_m; ABM) of symbols, and the cardinality of each of the alphabets (ADM_, . . . , ADM_m) of the distribution matching processes (DM_, . . . , DM_m) is lower than the cardinality of the alphabet (ABM) of the symbol mapping process (BM).

Methods of converting or reconverting a data signal and method and system for data transmission and/or data reception

Methods (C) for converting a data signal (U). The methods may comprise (i) providing an input symbol stream (IB) of input symbols (Bj), the input symbol stream (IB) being representative for the data signal (U) to be converted and (ii) applying to consecutive disjunct partial input symbol sequences (IB) of a number of p consecutive input symbols (IBj) covering said input symbol stream (IB), a distribution matching process (DM) to generate and output a final output symbol stream (OB) or a preform thereof, wherein the distribution matching process (DM) may be formed by a preceding shell mapping process (SM) and a succeeding amplitude mapping process (AM), wherein said shell mapping process (SM) may be configured to form and output to said amplitude mapping process (AM) for each of said consecutive partial input symbol sequences (IB) a sequence (s) of a number of q shell indices (s), and wherein said amplitude mapping process (AM) may be configured to assign to each shell index (s) a tuple of amplitude values.

A method (C) for converting a data signal (U). The method comprises processes of (i) providing an input bit stream (IB) of input bits (IBj), the input bit stream (IB) being representative for the underlying data signal (U) to be converted, and (ii) applying to consecutive disjunct partial input bit sequences (IB) of a number of k consecutive input bits (IBj) covering said input bit stream (IB) a distribution matching process (DM) to generate and output a final output bit stream (OB) or a preform thereof. The distribution matching process (DM) is formed by a quadrant constellation shaping process (QS) and configured to map a respective partial input bit sequence (IB) to a constellation point of a four-dimensional 2-QAM constellation&#x2014;in particular conveying two distinct polarizations for each of an in-phase and a quadrature component&#x2014;with I and m being fixed natural numbers and with k and m fulfilling the relation 4&#xb7;m&#x2265;k.

Methods (C) for converting a data signal (U), comprising processes of (i) providing an input symbol stream (IB) of input symbols (IBj), the input symbol stream (IB) being representative for the underlying data signal (U) to be converted, and (ii) applying a distribution matching process to consecutive partial input symbol sequences (IB) of a number of k consecutive input symbols (IBj) covering said input symbol stream (IB). The distribution matching process (DM) generates and outputs a final output symbol stream (OB) of consecutive output symbols (OBj) or a preform thereof, wherein the distribution matching process (DM) is based on and/or comprises a family ((&#x192;)) of a number (n) of distribution matching functions (&#x192;), the action of the distribution matching process (DM) is achieved by acting with one of said distribution matching functions (&#x192;) selected from said family ((&#x192;)) on said partial input symbol sequences (IB), and wherein selecting a distribution matching function (&#x192;) from said family ((&#x192;)) is based on a set of rules comprising at least one selection rule.

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Fabian Steiner