Patent ID: 11877164
Assignee: CONSTELLATION DESIGNS, LLC
Field: Digital communication (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 28:
29. A method of receiving data, comprising:
receiving a signal at a receiver via a communication channel having a channel signal-to-noise ratio (SNR);
demodulating the received signal into a demodulated signal using the receiver;
determining likelihoods using the receiver based upon the demodulated signal and a symbol constellation selected from a set of symbol constellations comprising:
a uniformly spaced QAM-64 symbol constellation; and
an unequally spaced Quadrature Amplitude Modulated 64 point (QAM-64) symbol constellation; and

decoding a sequence of received bits based upon the determined likelihoods and a low density parity check (LDPC) code having a code rate using the receiver, where the decoding process considers each bit-level separately; and
providing the sequence of received bits from the receiver to a sink device;
wherein the unequally spaced QAM-64 symbol constellation is characterized in that use of the unequally spaced QAM-64 symbol constellation in combination with the LDPC code provides an SNR gain of at least 0.2 dB compared to use of the uniformly spaced QAM-64 symbol constellation in combination with the LDPC code.