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US 11,115,259 B2Granted
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.
Claims4
A transmitting apparatus comprising:
- an interleaver configured to interleave a codeword comprising input bits and parity bits;
- and
- a constellation mapper configured to de-multiplex bits of the interleaved codeword to generate data cells, and map the data cells to constellation points for 1024-quadrature amplitude modulation (QAM),
- wherein the parity bits are generated by encoding the input bits based on a low density parity check (LDPC) code, a code rate of the LDPC code being 3/15, and
- 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:
- 0.2382
- 0.2556
- 0.2749
- 0.2558
- 0.2748
- 0.2949
- 0.2749
- 0.2558
- 0.9486
- 0.8348
- 0.7810
- 0.8348
- 0.9463
- 0.8336
- 0.9459
- 1.4299.
19 more elements
A receiving apparatus comprising:
- a demodulator configured to demodulate a signal to generate values;
- and
- a decoder configured to decode the values based on a low density parity check (LDPC) code, a code rate of the LDPC code being 3/15,
- wherein the demodulator is configured to demodulate the signal based on constellation points for 1024-quadrature amplitude modulation (QAM), and
- 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:
- 0.2382
- 0.2556
- 0.2749
- 0.2558
- 0.2748
- 0.2949
- 0.2749
- 0.2558
- 0.9486
- 0.8348
- 0.7810
- 0.8348
- 0.9463
- 0.8336
- 0.9459
- 1.4299.
19 more elements
Dependencies are inferred from the claim text.