Communicating nonuniform sources using systematic codes

A receiver, 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 receiver to:
• receive a message comprising a plurality of systematic bits modulated according to an asymmetric modulation rule;
• demodulate the plurality of systematic bits according to the asymmetric modulation rule, wherein a first bit value corresponds to a first constellation point on a constellation graph and a second bit value corresponds to a second constellation point on the constellation graph that is relatively closer to a center of the constellation graph than the first constellation point;
• and
• decode the plurality of systematic bits for the message, wherein the plurality of systematic bits are nonuniformly distributed over a time period such that the first bit value has a first probability of occurrence during the time period and the second bit value has a second probability of occurrence during the time period that is greater than the first probability of the occurrence, wherein the second constellation point on the constellation graph is relatively closer to the center of the constellation graph than the first constellation point based at least in part on the second probability being greater than the first probability.

A method for wireless communications at a transmitter, comprising:

• generating a plurality of systematic bits for a message, wherein the plurality of systematic bits are nonuniformly distributed over a time period such that a first bit value has a first probability of occurrence during the time period and a second bit value has a second probability of occurrence during the time period that is greater than the first probability of the occurrence;
• modulating the plurality of systematic bits according to an asymmetric modulation rule such that the first bit value corresponds to a first constellation point on a constellation graph and the second bit value corresponds to a second constellation point on the constellation graph that is relatively closer to a center of the constellation graph than the first constellation point based at least in part on the second probability being greater than the first probability;
• and
• transmitting the message comprising the plurality of systematic bits modulated according to the asymmetric modulation rule.

A method for wireless communications at a receiver, comprising:

• receiving a message comprising a plurality of systematic bits modulated according to an asymmetric modulation rule;
• demodulating the plurality of systematic bits according to the asymmetric modulation rule, wherein a first bit value corresponds to a first constellation point on a constellation graph and a second bit value corresponds to a second constellation point on the constellation graph that is relatively closer to a center of the constellation graph than the first constellation point;
• and
• decoding the plurality of systematic bits for the message, wherein the plurality of systematic bits are nonuniformly distributed over a time period such that the first bit value has a first probability of occurrence during the time period and the second bit value has a second probability of occurrence during the time period that is greater than the first probability of the occurrence, wherein the second constellation point on the constellation graph is relatively closer to the center of the constellation graph than the first constellation point based at least in part on the second probability being greater than the first probability.