US 11,871,252 B2
Methods of receiving data using unequally spaced quadrature amplitude modulated 64 point symbol constellations
Maged F. Barsoum, San Jose, CA (US); and Christopher R. Jones, Pacific Palisades, CA (US)
Assigned to Constellation Designs, LLC, Wayne, PA (US)
Filed by Constellation Designs, LLC, Anaheim, CA (US)
Filed on May 26, 2022, as Appl. No. 17/804,307.
Application 17/804,307 is a continuation of application No. 17/325,169, filed on May 19, 2021.
Application 17/325,169 is a continuation of application No. 16/728,397, filed on Dec. 27, 2019, granted, now 11,051,187, issued on Jun. 29, 2021.
Application 16/728,397 is a continuation of application No. 16/206,991, filed on Nov. 30, 2018, granted, now 10,567,980, issued on Feb. 18, 2020.
Application 16/206,991 is a continuation of application No. 15/682,475, filed on Aug. 21, 2017, granted, now 10,149,179, issued on Dec. 4, 2018.
Application 15/682,475 is a continuation of application No. 15/200,800, filed on Jul. 1, 2016, granted, now 9,743,292, issued on Aug. 22, 2017.
Application 15/200,800 is a continuation of application No. 14/491,731, filed on Sep. 19, 2014, granted, now 9,385,832, issued on Jul. 5, 2016.
Application 14/491,731 is a continuation of application No. 13/618,630, filed on Sep. 14, 2012, granted, now 8,842,761, issued on Sep. 23, 2014.
Application 13/618,630 is a continuation of application No. 13/118,921, filed on May 31, 2011, granted, now 8,270,511, issued on Sep. 18, 2012.
Application 13/118,921 is a continuation of application No. 12/156,989, filed on Jun. 5, 2008, granted, now 7,978,777, issued on Jul. 12, 2011.
Claims priority of provisional application 60/933,319, filed on Jun. 5, 2007.
Prior Publication US 2022/0295313 A1, Sep. 15, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H04W 24/02 (2009.01); H04L 1/00 (2006.01); H04L 27/34 (2006.01); H04B 17/336 (2015.01); H03M 13/25 (2006.01); H03M 13/00 (2006.01); H04L 27/38 (2006.01); H04B 15/00 (2006.01)
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
OG exemplary drawing
 
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.