Streaming and normalization for asymmetric numeral system-based probabilistic shaping

A second wireless device, comprising:

• one or more memories storing processor-executable code;
• and
• one or more processors coupled with the one or more memories and individually or collectively operable to execute the code to cause the second wireless device to:
• obtain a plurality of shaped modulation symbols and a configuration for entropy coding-based probabilistic shaping of data, the configuration indicating a range parameter, a bitwidth parameter, and a quantity of symbols to be shaped, wherein each shaped modulation symbol of the plurality of shaped modulation symbols is obtained by:
• determining a probability distribution parameter associated with a shaped modulation symbol of the plurality of shaped modulation symbols based at least in part on a subset of the plurality of shaped modulation symbols;
• determining a range interval associated with the shaped modulation symbol based at least in part on the range parameter, a frequency associated with the subset of the plurality of shaped modulation symbols, and the bitwidth parameter,
• scaling an entropy coding state associated with the shaped modulation symbol and the entropy coding-based probabilistic shaping to obtain a scaled entropy coding state that occurs within the range interval, and
• applying entropy decoding, based at least in part on the probability distribution parameter and the scaled entropy coding state, to update an entropy coding state associated with a second shaped modulation symbol, and
• output a deshaped information vector based at least in part on the plurality of shaped modulation symbols.

A method for wireless communications at a first wireless device, the method comprising:

• generating a plurality of shaped modulation symbols based at least in part on a configuration for entropy coding-based probabilistic shaping of data, the configuration indicating a range parameter, a bitwidth parameter, and a quantity of symbols to be shaped, wherein each shaped modulation symbol of the plurality of shaped modulation symbols is generated by:
• determining a probability distribution parameter associated with a shaped modulation symbol of the plurality of shaped modulation symbols based at least in part on a target shaping distribution for the plurality of shaped modulation symbols;
• determining a range interval associated with the shaped modulation symbol based at least in part on the range parameter, a quantity of remaining symbols to generate of the plurality of shaped modulation symbols, and the bitwidth parameter,
• scaling an entropy coding state associated with the shaped modulation symbol and the entropy coding-based probabilistic shaping to obtain a scaled entropy coding state that occurs within the range interval, and
• applying entropy coding, based at least in part on the probability distribution parameter, to the scaled entropy coding state to generate the shaped modulation symbol of the plurality of shaped modulation symbols, and
• transmitting the plurality of shaped modulation symbols.

A method for wireless communications at a second wireless device, comprising:

• obtaining a plurality of shaped modulation symbols and a configuration for entropy coding-based probabilistic shaping of data, the configuration indicating a range parameter, a bitwidth parameter, and a quantity of symbols to be shaped, wherein each shaped modulation symbol of the plurality of shaped modulation symbols is obtained by:
• determining a probability distribution parameter associated with a shaped modulation symbol of the plurality of shaped modulation symbols based at least in part on a subset of the plurality of shaped modulation symbols;
• determining a range interval associated with the shaped modulation symbol based at least in part on the range parameter, a frequency associated with the subset of the plurality of shaped modulation symbols, and the bitwidth parameter,
• scaling an entropy coding state associated with the shaped modulation symbol and the entropy coding-based probabilistic shaping to obtain a scaled entropy coding state that occurs within the range interval, and
• applying entropy decoding, based at least in part on the probability distribution parameter and the scaled entropy coding state, to update an entropy coding state associated with a second shaped modulation symbol, and
• outputting a deshaped information vector based at least in part on the plurality of shaped modulation symbols.