Coding and modulation apparatus using non-uniform constellation
A coding and modulation apparatus and method are presented. The apparatus comprises an encoder that encodes input data into cell words, and a modulator that modulates said cell words into constellation values of a non-uniform constellation. The modulator is configured to use, based on the total number M of constellation points of the constellation and the signal-to-noise ratio SNR in dB, a non-uniform constellation from a group of constellations comprising one or more of predetermined constellations defined by the constellation position vector w 0 . . . b-1 , wherein b=M/4.
1. A receiving apparatus comprising:
a receiver configured to receive at least one transmission stream including symbols representative of constellation values; and
at least one processor configured to demodulate the symbols into cell words, wherein
each of the symbols is associated with a point of a NUC, Non-Uniform Constellation,
the NUC includes sixteen points,
a first quarter of the NUC includes complex points defined by their real and imaginary parts as:
0.4487+j1.1657
1.2080+j0.5377
0.2213+j0.4416
0.6186+j0.2544,
a second quarter of the NUC includes points, each being an opposite of a complex conjugate of a point of the first quarter,
a third quarter of the NUC includes points, each being a complex conjugate of a point of the first quarter, and
a fourth quarter of the NUC includes points, each being an opposite of a point of the first quarter.
2. The receiving apparatus according to claim 1 , wherein the at least one transmission stream is a digital video broadcasting stream.
3. The receiving apparatus according to claim 1 , wherein the at least one processor is configured to decode the cell words into output data.
4. A receiving method comprising:
receiving at least one transmission stream including symbols representative of constellation values; and
demodulating the symbols into cell words, wherein
each of the symbols is associated with a point of a NUC, Non-Uniform Constellation,
the NUC includes sixteen points,
a first quarter of the NUC includes complex points defined by their real and imaginary parts as:
0.4487+j1.1657
1.2080+j0.5377
0.2213+j0.4416
0.6186+j0.2544,
a second quarter of the NUC includes points, each being an opposite of a complex conjugate of a point of the first quarter,
a third quarter of the NUC includes points, each being a complex conjugate of a point of the first quarter, and
a fourth quarter of the NUC includes points, each being an opposite of a point of the first quarter.
5. The receiving method according to claim 4 , wherein the at least one transmission stream is a digital video broadcasting stream.
6. The receiving method according to claim 4 , further comprising decoding the cell words into output data.
7. A non-transitory computer-readable storage medium storing computer-readable instructions, which, when executed by a receiving apparatus, cause the receiving apparatus to perform a receiving method comprising:
receiving at least one transmission stream including symbols representative of constellation values; and
demodulating the symbols into cell words, wherein
each of the symbols is associated with a point of a NUC, Non-Uniform Constellation,
the NUC includes sixteen points,
a first quarter of the NUC includes complex points defined by their real and imaginary parts as:
0.4487+j1.1657
1.2080+j0.5377
0.2213+j0.4416
0.6186+j0.2544,
a second quarter of the NUC includes points, each being an opposite of a complex conjugate of a point of the first quarter,
a third quarter of the NUC includes points, each being a complex conjugate of a point of the first quarter, and
a fourth quarter of the NUC includes points, each being an opposite of a point of the first quarter.
8. A receiving apparatus comprising:
a receiver configured to receive at least one transmission stream including symbols representative of constellation values; and
at least one processor configured to demodulate the symbols into cell words, wherein
each of the symbols is associated with a point of a NUC, Non-Uniform Constellation,
the NUC includes sixty-four points,
a first quarter of the NUC includes complex points defined by their real and imaginary parts as:
1.4827+j0.2920
1.2563+j0.8411
1.0211+j0.2174
0.8798+j0.5702
0.2920+j1.4827
0.8411+j1.2563
0.2174+j1.0211
0.5702+j0.8798
0.3040+j0.1475
0.3028+j0.1691
0.6855+j0.1871
0.6126+j0.3563
0.1475+j0.3040
0.1691+j0.3028
0.1871+j0.6855
0.3563+j0.6126,
a second quarter of the NUC includes points, each being an opposite of a complex conjugate of a point of the first quarter,
a third quarter of the NUC includes points, each being a complex conjugate of a point of the first quarter, and
a fourth quarter of the NUC includes points, each being an opposite of a point of the first quarter.
9. The receiving apparatus according to claim 8 , wherein the at least one transmission stream is a digital video broadcasting stream.
10. The receiving apparatus according to claim 8 , wherein the at least one processor is configured to decode the cell words into output data.
11. A receiving method comprising:
receiving at least one transmission stream including symbols representative of constellation values; and
demodulating the symbols into cell words, wherein
each of the symbols is associated with a point of a NUC, Non-Uniform Constellation,
the NUC includes sixty-four points,
a first quarter of the NUC includes complex points defined by their real and imaginary parts as:
1.4827+j0.2920
1.2563+j0.8411
1.0211+j0.2174
0.8798+j0.5702
0.2920+j1.4827
0.8411+j1.2563
0.2174+j1.0211
0.5702+j0.8798
0.3040+j0.1475
0.3028+j0.1691
0.6855+j0.1871
0.6126+j0.3563
0.1475+j0.3040
0.1691+j0.3028
0.1871+j0.6855
0.3563+j0.6126,
a second quarter of the NUC includes points, each being an opposite of a complex conjugate of a point of the first quarter,
a third quarter of the NUC includes points, each being a complex conjugate of a point of the first quarter, and
a fourth quarter of the NUC includes points, each being an opposite of a point of the first quarter.
12. The receiving method according to claim 11 , wherein the at least one transmission stream is a digital video broadcasting stream.
13. The receiving method according to claim 11 , wherein further comprising decoding the cell words into output data.
14. A non-transitory computer-readable storage medium storing computer-readable instructions, which, when executed by a receiving apparatus, cause the receiving apparatus to perform a receiving method comprising:
receiving at least one transmission stream including symbols representative of constellation values; and
demodulating the symbols into cell words, wherein
each of the symbols is associated with a point of a NUC, Non-Uniform Constellation,
the NUC includes sixty-four points,
a first quarter of the NUC includes complex points defined by their real and imaginary parts as:
1.4827+j0.2920
1.2563+j0.8411
1.0211+j0.2174
0.8798+j0.5702
0.2920+j1.4827
0.8411+j1.2563
0.2174+j1.0211
0.5702+j0.8798
0.3040+j0.1475
0.3028+j0.1691
0.6855+j0.1871
0.6126+j0.3563
0.1475+j0.3040
0.1691+j0.3028
0.1871+j0.6855
0.3563+j0.6126,
a second quarter of the NUC includes points, each being an opposite of a complex conjugate of a point of the first quarter,
a third quarter of the NUC includes points, each being a complex conjugate of a point of the first quarter, and
a fourth quarter of the NUC includes points, each being an opposite of a point of the first quarter.
15. A receiving apparatus comprising:
a receiver configured to receive at least one transmission stream including symbols representative of constellation values; and
at least one processor configured to demodulate the symbols into cell words, wherein
each of the symbols is associated with a point of a NUC, Non-Uniform Constellation,
the NUC includes sixty-four points,
a first quarter of the NUC includes complex points defined by their real and imaginary parts as:
1.4480+j0.2403
0.6406+j1.1995
1.0952+j0.9115
0.6868+j0.8108
1.0500+j0.1642
0.7170+j0.1473
1.0519+j0.5188
0.7146+j0.4532
0.1677+j1.0405
0.2402+j1.4087
0.1369+j0.7073
0.4044+j0.7057
0.1374+j0.1295
0.4185+j0.1357
0.1325+j0.3998
0.4122+j0.4120,
a second quarter of the NUC includes points, each being an opposite of a complex conjugate of a point of the first quarter,
a third quarter of the NUC includes points, each being a complex conjugate of a point of the first quarter, and
a fourth quarter of the NUC includes points, each being an opposite of a point of the first quarter.
16. The receiving apparatus according to claim 15 , wherein the at least one transmission stream is a digital video broadcasting stream.
17. The receiving apparatus according to claim 15 , wherein the at least one processor is configured to decode the cell words into output data.
18. A receiving method comprising:
receiving at least one transmission stream including symbols representative of constellation values; and
demodulating the symbols into cell words, wherein
each of the symbols is associated with a point of a NUC, Non-Uniform Constellation,
the NUC includes sixty-four points,
a first quarter of the NUC includes complex points defined by their real and imaginary parts as:
1.4480+j0.2403
0.6406+j1.1995
1.0952+j0.9115
0.6868+j0.8108
1.0500+j0.1642
0.7170+j0.1473
1.0519+j0.5188
0.7146+j0.4532
0.1677+j1.0405
0.2402+j1.4087
0.1369+j0.7073
0.4044+j0.7057
0.1374+j0.1295
0.4185+j0.1357
0.1325+j0.3998
0.4122+j0.4120,
a second quarter of the NUC includes points, each being an opposite of a complex conjugate of a point of the first quarter,
a third quarter of the NUC includes points, each being a complex conjugate of a point of the first quarter, and
a fourth quarter of the NUC includes points, each being an opposite of a point of the first quarter.
19. The receiving method according to claim 18 , wherein the at least one transmission stream is a digital video broadcasting stream.
20. The receiving method according to claim 18 , further comprising decoding the cell words into output data.
21. A non-transitory computer-readable storage medium storing computer-readable instructions, which, when executed by a receiving apparatus, cause the receiving apparatus to perform a receiving method comprising:
receiving at least one transmission stream including symbols representative of constellation values; and
demodulating the symbols into cell words, wherein
each of the symbols is associated with a point of a NUC, Non-Uniform Constellation,
the NUC includes sixty-four points,
a first quarter of the NUC includes complex points defined by their real and imaginary parts as:
1.4480+j0.2403
0.6406+j1.1995
1.0952+j0.9115
0.6868+j0.8108
1.0500+j0.1642
0.7170+j0.1473
1.0519+j0.5188
0.7146+j0.4532
0.1677+j1.0405
0.2402+j1.4087
0.1369+j0.7073
0.4044+j0.7057
0.1374+j0.1295
0.4185+j0.1357
0.1325+j0.3998
0.4122+j0.4120,
a second quarter of the NUC includes points, each being an opposite of a complex conjugate of a point of the first quarter,
a third quarter of the NUC includes points, each being a complex conjugate of a point of the first quarter, and
a fourth quarter of the NUC includes points, each being an opposite of a point of the first quarter.