Constellation shaping configuration and feedback

A method for wireless communication at a base station, comprising:

• transmitting, to a user equipment (UE), a configuration indicating a set of encoding parameters corresponding to a constellation shaping encoding process, wherein the set of encoding parameters indicate a number of bits of a first subset of a source bit stream and a number of bits of a second subset of the source bit stream, wherein the first subset of the source bit stream comprises an input to a distribution matcher of the constellation shaping encoding process, and wherein the second subset of the source bit stream is concatenated with an output bit stream of the distribution matcher as an input to a channel encoder;
• and
• communicating signaling with the UE comprising the source bit stream;
• and
• wherein the set of encoding parameters comprises a first parameter indicating a ratio of a total number of bits of the source bit stream to a total number of symbols corresponding to a modulated bit stream, a second parameter indicating a channel encoding rate, and a third parameter indicating the distribution matcher parameter.

An apparatus for wireless communication at a user equipment (UE), comprising:

• a processor;
• memory coupled with the processor;
• and
• instructions stored in the memory and executable by the processor to cause the apparatus to:
• receive, from a base station, a configuration indicating a set of encoding parameters corresponding to a constellation shaping encoding process;
• calculate, based at least in part on the set of encoding parameters, a number of bits of a first subset of a source bit stream, wherein the first subset of the source bit stream comprises an input to a distribution matcher of the constellation shaping encoding process;
• apply, to the first subset of the source bit stream and at the distribution matcher, a distribution matcher parameter based at least in part on the set of encoding parameters;
• calculate, based at least in part on the set of encoding parameters, a number of bits of a second subset of the source bit stream, wherein the second subset of the source bit stream is concatenated with an output bit stream of the distribution matcher as an input to a channel encoder;
• and
• communicate signaling with the base station comprising the source bit stream;
• and
• wherein the set of encoding parameters comprises a first parameter indicating a ratio of a total number of bits of the source bit stream to a total number of symbols corresponding to a modulated bit stream, a second parameter indicating a channel encoding rate, and a third parameter indicating the distribution matcher parameter.

An apparatus for wireless communication at a base station, comprising:

• a processor;
• memory coupled with the processor;
• and
• instructions stored in the memory and executable by the processor to cause the apparatus to:
• transmit, to a user equipment (UE), a configuration indicating a set of encoding parameters corresponding to a constellation shaping encoding process, wherein the set of encoding parameters indicate a number of bits of a first subset of a source bit stream and a number of bits of a second subset of the source bit stream, wherein the first subset of the source bit stream comprises an input to a distribution matcher of the constellation shaping encoding process, and wherein the second subset of the source bit stream is concatenated with an output bit stream of the distribution matcher as an input to a channel encoder;
• and
• communicate signaling with the UE comprising the source bit stream;
• and
• wherein the set of encoding parameters comprises a first parameter indicating a ratio of a total number of bits of the source bit stream to a total number of symbols corresponding to a modulated bit stream, a second parameter indicating a channel encoding rate, and a third parameter indicating the distribution matcher parameter.