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US 9,853,771 B2Granted
Transmitting apparatus and mapping method thereof
AssigneeSamsung Electronics Co., Ltd.
InventorsBelkacem Mouhouche, Daniel Ansorregui Lobete, Hong-sil Jeong
Life of this patent
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Abstract
A transmitting apparatus is disclosed. The transmitting apparatus includes an encoder to perform channel encoding with respect to bits and generate a codeword, an interleaver to interleave the codeword, and a modulator to map the interleaved codeword onto a non-uniform constellation according to a modulation scheme, and the constellation may include constellation points defined based on various tables according to the modulation scheme.
Claims6
A transmitting apparatus comprising at least one hardware processor to implement:
- an encoder configured to encode input bits to generate parity bits based on a low density parity check (LDPC) code;
- an interleaver configured to interleave a codeword comprising the input bits and the parity bits;
- and
- a constellation mapper configured to map bits of the interleaved codeword onto constellation points for 256-quadrature amplitude modulation (QAM),
- wherein the constellation points comprise constellation points as represented in a list below:
- 0.0899+0.1337i
- 0.0910+0.1377i
- 0.0873+0.3862i
- 0.0883+0.3873i
- 0.1115+0.1442i
- 0.1135+0.1472i
- 0.2067+0.3591i
- 0.1975+0.3621i
- 0.1048+0.7533i
- 0.1770+0.7412i
- 0.1022+0.5904i
- 0.1191+0.5890i
- 0.4264+0.6230i
- 0.3650+0.6689i
- 0.3254+0.5153i
- 0.2959+0.5302i
- 0.3256+0.0768i
- 0.3266+0.0870i
- 0.4721+0.0994i
- 0.4721+0.1206i
- 0.2927+0.1267i
- 0.2947+0.1296i
- 0.3823+0.2592i
- 0.3944+0.2521i
- 0.7755+0.1118i
- 0.7513+0.2154i
- 0.6591+0.1033i
- 0.6446+0.1737i
- 0.5906+0.4930i
- 0.6538+0.4155i
- 0.4981+0.3921i
- 0.5373+0.3586i
- 0.1630+1.6621i
- 0.4720+1.5898i
- 0.1268+1.3488i
- 0.3752+1.2961i
- 1.0398+1.2991i
- 0.7733+1.4772i
- 0.8380+1.0552i
- 0.6242+1.2081i
- 0.1103+0.9397i
- 0.2415+0.9155i
- 0.1118+1.1163i
- 0.3079+1.0866i
- 0.5647+0.7638i
- 0.4385+0.8433i
- 0.6846+0.8841i
- 0.5165+1.0034i
- 1.6489+0.1630i
- 1.5848+0.4983i
- 1.3437+0.1389i
- 1.2850+0.4025i
- 1.2728+1.0661i
- 1.4509+0.7925i
- 1.0249+0.8794i
- 1.1758+0.6545i
- 0.9629+0.1113i
- 0.9226+0.2849i
- 1.1062+0.1118i
- 1.0674+0.3393i
- 0.7234+0.6223i
- 0.8211+0.4860i
- 0.8457+0.7260i
- 0.9640+0.5518i.
66 more elements
A mapping method of a transmitting apparatus, comprising:
- encoding, using at least one hardware processor, input bits to generate parity bits based on a low density parity check (LDPC) code;
- interleaving, using at least one hardware processor, a codeword comprising the input bits and the parity bits;
- and
- mapping, using at least one hardware processor, the interleaved codeword onto constellation points for 256-quadrature amplitude modulation (QAM),
- wherein the constellation points comprise constellation points as represented in a list below:
- 0.0899 + 0.1337i
- 0.0910 + 0.1377i
- 0.0873 + 0.3862i
- 0.0883 + 0.3873i
- 0.1115 + 0.1442i
- 0.1135 + 0.1472i
- 0.2067 + 0.3591i
- 0.1975 + 0.3621i
- 0.1048 + 0.7533i
- 0.1770 + 0.7412i
- 0.1022 + 0.5904i
- 0.1191 + 0.5890i
- 0.4264 + 0.6230i
- 0.3650 + 0.6689i
- 0.3254 + 0.5153i
- 0.2959 + 0.5302i
- 0.3256 + 0.0768i
- 0.3266 + 0.0870i
- 0.4721 + 0.0994i
- 0.4721 + 0.1206i
- 0.2927 + 0.1267i
- 0.2947 + 0.1296i
- 0.3823 + 0.2592i
- 0.3944 + 0.2521i
- 0.7755 + 0.1118i
- 0.7513 + 0.2154i
- 0.6591 + 0.1033i
- 0.6446 + 0.1737i
- 0.5906 + 0.4930i
- 0.6538 + 0.4155i
- 0.4981 + 0.3921i
- 0.5373 + 0.3586i
- 0.1630 + 1.6621i
- 0.4720 + 1.5898i
- 0.1268 + 1.3488i
- 0.3752 + 1.2961i
- 1.0398 + 1.2991i
- 0.7733 + 1.4772i
- 0.8380 + 1.0552i
- 0.6242 + 1.2081i
- 0.1103 + 0.9397i
- 0.2415 + 0.9155i
- 0.1118 + 1.1163i
- 0.3079 + 1.0866i
- 0.5647 + 0.7638i
- 0.4385 + 0.8433i
- 0.6846 + 0.8841i
- 0.5165 + 1.0034i
- 1.6489 + 0.1630i
- 1.5848 + 0.4983i
- 1.3437 + 0.1389i
- 1.2850 + 0.4025i
- 1.2728 + 1.0661i
- 1.4509 + 0.7925i
- 1.0249 + 0.8794i
- 1.1758 + 0.6545i
- 0.9629 + 0.1113i
- 0.9226 + 0.2849i
- 1.1062 + 0.1118i
- 1.0674 + 0.3393i
- 0.7234 + 0.6223i
- 0.8211 + 0.4860i
- 0.8457 + 0.7260i
- 0.9640 + 0.5518i.
66 more elements
Dependencies are inferred from the claim text.