Patent ID: 11930379
Assignee: CONSTELLATION DESIGNS, LLC
Field: Digital communication (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 34:
35. A method of receiving data using a communication system, comprising:
receiving signals via a communication channel having a channel signal-to-noise ratio (SNR);
transforming the received signals into received bits using a symbol constellation selected from a set of symbol constellations based upon a low density parity check (LDPC) code having a code rate;
wherein each symbol constellation in the set of symbol constellations is utilized in combination with a code rate;
wherein the set of symbol constellations comprises a group of symbol constellations, where each symbol constellation in the group of symbol constellations has the same number of constellation points that have amplitude and phase values;
wherein the group of symbol constellations includes:
a symbol constellation in which constellation points that share an amplitude value are evenly spaced with respect to phase; and
a plurality of symbol constellations, where each symbol constellation of the plurality of symbol constellations is utilized in combination with a code rate that is different from the code rates utilized by the other symbol constellations in the plurality of symbol constellations and comprises:
constellation points that have a shared amplitude value; and
the constellation points that have the shared amplitude value are unevenly spaced with respect to phase; and

sending a request to modulate the signals received via the communication channel using a specific symbol constellation from the set of symbol constellations and a specific code rate, where the specific symbol constellation and the specific code rate are selected based on a quality measurement.