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US 2018/0006754 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 of a transmitting apparatus, the method comprising:
- encoding input bits to generate parity bits based on a low density parity check (LDPC) code according to 4/15 code rate;
- interleaving a codeword comprising the input bits and the parity bits;
- mapping bits of the interleaved codeword onto constellation points for 1024-quadrature amplitude modulation (QAM);
- and
- transmitting a signal based on the constellation points,
- wherein each of the constellation points is represented in one of A+Bi, −A+Bi, A−Bi and A−Bi,
- where A is a real component, B is an imaginary component, and each of A and B comprises one of values listed below:
- 0.1924
- 0.1940
- 0.2070
- 0.2050
- 0.3056
- 0.3096
- 0.2890
- 0.2854
- 0.7167
- 0.7362
- 0.7500
- 0.7326
- 0.9667
- 0.9665
- 1.1332
- 1.4761.
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Dependencies are inferred from the claim text.