CPC H04W 24/02 (2013.01) [H03M 13/255 (2013.01); H03M 13/6325 (2013.01); H04B 15/00 (2013.01); H04B 17/336 (2015.01); H04L 1/0003 (2013.01); H04L 1/0009 (2013.01); H04L 27/3405 (2013.01); H04L 27/3483 (2013.01); H04L 27/3809 (2013.01)] | 84 Claims |
1. A method of receiving data, comprising:
receiving a signal at a receiver via a communication channel having a channel signal-to-noise ratio (SNR), where the receiver comprises a demodulator, a demapper, and a decoder;
demodulating the received signal into a demodulated signal using the demodulator and providing the demodulated signal to the demapper via a coupling between the demodulator and the demapper;
determining likelihoods using the demapper based upon the demodulated signal and an unequally spaced Quadrature Amplitude Modulated 64 point (QAM-64) symbol constellation;
providing the determined likelihoods to the decoder via a coupling between the demapper and the decoder, where the decoder considers each bit-level separately; and
providing a sequence of received bits from the decoder to a sink device based upon the determined likelihoods and a low density parity check (LDPC) code having a code rate;
wherein 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 a uniformly spaced QAM-64 symbol constellation in combination with the LDPC code.
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