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US 2021/0083799 A1Published application
Transmitting apparatus and modulation method thereof
AssigneeSamsung Electronics Co., Ltd.
InventorsSe-ho MYUNG, Belkacem MOUHOUCE, 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 receiving apparatus comprising:
- a receiver configured to receive a signal from a transmitting apparatus;
- a demodulator configured to demodulate the signal to generate values according to 64-quadrature amplitude modulation (QAM);
- a deinterleaver configured to deinterleave the values;
- and
- a decoder configured to decode the deinterleaved values based on a low density parity check (LDPC) code having a code rate of 3/15,
- wherein the demodulator is configured to demodulate the signal based on at least one constellation point among constellation points represented as a table below:
- 0.5472 + 1.1591i
- 0.5473 + 1.1573i
- 0.5467 + 1.1599i
- 0.5479 + 1.1585i
- 1.1578 + 0.5478i
- 1.1576 + 0.5475i
- 1.1591 + 0.5475i
- 1.1591 + 0.5475i
- 0.3163 + 0.5072i
- 0.3163 + 0.5072i
- 0.3163 + 0.5072i
- 0.3163 + 0.5072i
- 0.5087 + 0.3163i
- 0.5087 + 0.3163i
- 0.5087 + 0.3163i
- 0.5087 + 0.3163i
19 more elements
A transmitting apparatus comprising:
- an interleaver configured to interleave a codeword;
- a mapper configured to bits of the interleaved codeword to at least one constellation point among constellation points for 64-quadrature amplitude modulation (QAM);
- and
- wherein the codeword comprising input bits and parity bits which are generated by encoding the input bits based on a low density parity check (LDPC) code having a code rate of 3/15;
- wherein the constellation points comprises constellation points represented as a table below:
- 0.5472 + 1.1591i
- 0.5473 + 1.1573i
- 0.5467 + 1.1599i
- 0.5479 + 1.1585i
- 1.1578 + 0.5478i
- 1.1576 + 0.5475i
- 1.1591 + 0.5475i
- 1.1591 + 0.5475i
- 0.3163 + 0.5072i
- 0.3163 + 0.5072i
- 0.3163 + 0.5072i
- 0.3163 + 0.5072i
- 0.5087 + 0.3163i
- 0.5087 + 0.3163i
- 0.5087 + 0.3163i
- 0.5087 + 0.3163i
18 more elements
Dependencies are inferred from the claim text.