Joint low-density parity-check coding and modulation designs

An apparatus for wireless communications at a receiving device, comprising:

• at least one processor;
• and
• at least one memory coupled with the at least one processor, the at least one memory storing instructions executable by the at least one processor, individually or in any combination, to cause the apparatus to:
• receive a signal comprising a plurality of information bits and a plurality of parity bits corresponding to a low-density parity-check code;
• generate the low-density parity-check code according to a base graph comprising a plurality of variable nodes and a plurality of check nodes, wherein a first set of information nodes of the plurality of variable nodes comprise second degree nodes corresponding to two check nodes of the plurality of check nodes;
• and
• decode the plurality of information bits based at least in part on the plurality of parity bits, a plurality of information nodes, and a plurality of parity nodes, the plurality of information nodes and the plurality of parity nodes corresponding to the base graph, wherein the first set of information nodes of the plurality of variable nodes comprise second degree nodes corresponding to two check nodes of the plurality of check nodes;
• and wherein a first quantity of the first set of information nodes corresponds to a first significance level of a plurality of significance levels, and a second quantity of the first set of information nodes different than the first quantity corresponds to a second significance level of the plurality of significance levels.

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

• generating a low-density parity-check code according to a base graph comprising a plurality of variable nodes and a plurality of check nodes, wherein a first set of information nodes of the plurality of variable nodes comprise second degree nodes corresponding to two check nodes of the plurality of check nodes;
• encoding a plurality of information nodes and a plurality of parity nodes according to the base graph, wherein a first quantity of the first set of information nodes corresponds to a first significance level of a plurality of significance levels, and a second quantity of the first set of information nodes different than the first quantity corresponds to a second significance level of the plurality of significance levels;
• and
• transmitting a signal comprising a plurality of information bits and a plurality of parity bits based at least in part on the encoding the plurality of information nodes and the plurality of parity nodes.

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

• receiving a signal comprising a plurality of information bits and a plurality of parity bits corresponding to a low-density parity-check code;
• generating the low-density parity-check code according to a base graph comprising a plurality of variable nodes and a plurality of check nodes, wherein a first set of information nodes of the plurality of variable nodes comprise second degree nodes corresponding to two check nodes of the plurality of check nodes;
• and
• decoding the plurality of information bits based at least in part on the plurality of parity bits, a plurality of information nodes, and a plurality of parity nodes, the plurality of information nodes and the plurality of parity nodes corresponding to the base graph, wherein the first set of information nodes of the plurality of variable nodes comprise second degree nodes corresponding to two check nodes of the plurality of check nodes;
• and wherein a first quantity of the first set of information nodes corresponds to a first significance level of a plurality of significance levels, and a second quantity of the first set of information nodes different than the first quantity corresponds to a second significance level of the plurality of significance levels.