Coding and modulation apparatus using non-uniform constellation
AssigneeSaturn Licensing LLC
InventorsNabil Loghin, Lothar Stadelmeier, Jan Zoellner, Yuji Shinohara
Life of this patent
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Abstract
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 code rate, a non-uniform constellation from one or several groups of constellations each comprising one or more constellations.
Claims22
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 and wherein each of the symbols is associated with a point of a non-uniform constellation (NUC),
- wherein the NUC includes 64 points,
- wherein a first quarter of the NUC includes points defined by following real and imaginary parts:
- 0.5656+j0.9499
- 0.2750+j1.0676
- 0.8202+j1.2651
- 0.3011+j1.4529
- 0.9500+j0.5641
- 1.0666+j0.2744
- 1.2657+j0.8178
- 1.4521+j0.3005
- 0.3004+j0.5417
- 0.2430+j0.5607
- 0.2094+j0.3579
- 0.1946+j0.3566
- 0.5410+j0.3002
- 0.5596+j0.2431
- 0.3569+j0.2094
- 0.3553+j0.1948.
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 non-uniform constellation (NUC),
- wherein the NUC includes 64 points,
- wherein a first quarter of the NUC includes points defined by following real and imaginary parts:
- 0.5656+j0.9499
- 0.2750+0.0676
- 0.8202+j1.2651
- 0.3011+j1.4529
- 0.9500+j0.5641
- 1.0666+j0.2744
- 1.2657+j0.8178
- 1.4521+j0.3005
- 0.3004+j0.5417
- 0.2430+j0.5607
- 0.2094+j0.3579
- 0.1946+j0.3566
- 0.5410+j0.3002
- 0.5596+j0.2431
- 0.3569+j0.2094
- 0.3553+j0.1948.
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 and wherein each of the symbols is associated with a point of a non-uniform constellation (NUC),
- wherein the NUC includes 64 points,
- wherein a first quarter of the NUC includes points defined by following real and imaginary parts:
- 0.2920+j1.4827
- 0.2174+j1.0211
- 0.5702+j0.8798
- 1.4827+j0.2920
- 1.0211+j0.2174
- 0.8798+j0.5702
- 0.1475+j0.3040
- 0.1691+j0.3028
- 0.1871+j0.6855
- 0.3563+j0.6126
- 0.3040+j0.1475
- 0.3028+j0.1691
- 0.6855+j0.1871
- 0.6126+j0.3563.
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 non-uniform constellation (NUC),
- wherein the NUC includes 64 points, and
- wherein a first quarter of the NUC includes points defined by following real and imaginary parts:
- 0.2920+j 1.4827
- 0.2174+j1.0211
- 0.5702+0.8798
- 1.4827+j0.2920
- 1.0211+j0.2174
- 0.8798+j0.5702
- 0.1475+j0.3040
- 0.1691+j0.3028
- 0.1871+j0.6855
- 0.3563+j0.6126
- 0.3040+j0.1475
- 0.3028+j0.1691
- 0.6855+j0.1871
- 0.6126+j0.3563.
Dependencies are inferred from the claim text.