Patent ID: 11895513
Assignee: CONSTELLATION DESIGNS, LLC
Field: Digital communication (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 20:
21. A method of transmitting data, comprising:
encoding bits using a transmitter based upon received bits using a Low Density Parity Check (LDPC) code;
mapping the encoded bits to symbols in a symbol constellation using the transmitter, where the symbol constellation is selected from a plurality of symbol constellations that includes a group of symbol constellations that each have the same number of constellation points and comprise a ring of constellation points that are unequally spaced along the ring; and
transmitting a signal via a communication channel having a channel signal-to-noise ratio (SNR) based upon the mapped symbols using the transmitter;
wherein labels and spacing of the constellation points in each of the symbol constellations in the group of symbol constellations are arranged such that the symbol constellation is capable of providing a given capacity at a reduced signal-to-noise ratio as compared to a similar symbol constellation that differs only in that the constellation points in the ring are equally spaced around the ring.