Mapping schemes for parity codes with shaping

A second network entity for wireless communication, comprising:

• a processing system configured to:
• obtain a modulation symbol that indicates non-shaped payload bits, shaped payload bits, and parity bits;
• de-map each respective bit of the non-shaped payload bits from a respective bit index of a first subset of indices of a plurality of indices, wherein the first subset of indices includes, based on quantity information, at least one of:
• a first portion of one or more indices of the plurality of indices or a second portion of one or more indices of the plurality of indices, wherein the first portion of one or more indices corresponds to sign information of the modulation symbol, wherein the second portion of one or more indices of the plurality of indices corresponds to non-shaped information of the modulation symbol, and wherein the quantity information indicates a first quantity of the non-shaped payload bits relative to a second quantity of bits for the first portion of one or more indices;
• de-map each respective bit of the parity bits to a respective bit index of a second subset of indices of the plurality of indices, wherein the second subset of indices includes, based on the quantity information, at least one of:
• the first portion of one or more indices or the second portion of one or more indices;
• and
• de-map each respective bit of the shaped payload bits from a respective bit index of a third subset of indices of the plurality of indices, wherein the third subset of indices includes a third portion of one or more indices of the plurality of indices, wherein the third portion of one or more indices corresponds to shaped information of the modulation symbol.

A method of wireless communication performed by a first network entity, comprising:

• generating payload bits and parity bits, wherein the parity bits are based on the payload bits, and wherein the payload bits comprise shaped payload bits and non-shaped payload bits;
• mapping each respective bit of the non-shaped payload bits to a respective bit index of a first subset of indices of a plurality of indices, wherein the first subset of indices includes, based on quantity information, at least one of:
• a first portion of one or more indices of the plurality of indices or a second portion of one or more indices of the plurality of indices, wherein the first portion of one or more indices corresponds to sign information of a modulation symbol, wherein the second portion of one or more indices of the plurality of indices corresponds to non-shaped information of the modulation symbol, and wherein the quantity information indicates a first quantity of the non-shaped payload bits relative to a second quantity of bits for the first portion of one or more indices;
• mapping each respective bit of the parity bits to a respective bit index of a second subset of indices of the plurality of indices, wherein the second subset of indices includes, based on the quantity information, at least one of:
• the first portion of one or more indices or the second portion of one or more indices;
• mapping each respective bit of the shaped payload bits to a respective bit index of a third subset of indices of the plurality of indices, wherein the third subset of indices includes a third portion of one or more indices of the plurality of indices, wherein the third portion of one or more indices corresponds to shaped information of the modulation symbol;
• and
• outputting the modulation symbol including interleaved bits, wherein the interleaved bits include at least one shaped payload bit of the shaped payload bits, at least one non-shaped payload bit of the non-shaped payload bits, and at least one parity bit of the parity bits.