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US 2017/0324500 A1Published application
Transmitting apparatus and mapping method thereof
AssigneeSamsung Electronics Co., Ltd.
InventorsSe-ho MYUNG, Belkacem MOUHOUCHE, Daniel Ansorregui LOBETE, Kyung-joong KIM, Hong-sil JEONG
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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.
Claims3
A mapping method comprising:
- encoding input bits to generate parity bits based on a low density parity check (LDPC) code;
- interleaving a codeword comprising the input bits and the parity bits;
- and
- mapping bits of the interleaved codeword onto constellation points for 64-quadrature amplitude modulation (QAM),
- wherein the constellation points comprise constellation points as listed below:
- 0.5008 + 1.2136i
- 0.4994 + 1.2194i
- 0.5313 + 1.1715i
- 0.5299 + 1.1788i
- 1.2107 + 0.5037i
- 1.2209 + 0.5008i
- 1.1715 + 0.5299i
- 1.1802 + 0.5270i
- 0.2744 + 0.4762i
- 0.2729 + 0.4762i
- 0.2773 + 0.4791i
- 0.2773 + 0.4791i
- 0.4762 + 0.2729i
- 0.4762 + 0.2729i
- 0.4791 + 0.2773i
- 0.4791 + 0.2758i
18 more elements
Dependencies are inferred from the claim text.