Patent ID: 11864006
Assignee: CONSTELLATION DESIGNS, LLC
Field: Digital communication (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 17:
18. A method of transmitting data, comprising:
receiving a request at a transmitter to modulate signals transmitted via a communication channel using a specific symbol constellation from a set of symbol constellations and a specific code rate;
encoding bits based upon a Low Density Parity Check (LDPC) code having the specific code rate using the transmitter;
mapping the encoded bits to symbols in the specific symbol constellation using the transmitter; and
transmitting a signal via a communication channel having a channel signal-to-noise ratio (SNR) based upon the symbols using the transmitter;
wherein each symbol constellation in the set of symbol constellations is utilized by the transmitter 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

wherein the specific symbol constellation is from the plurality of symbol constellations that comprise constellation points that have a shared amplitude value and are unevenly spaced with respect to phase.