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US 11,637,735 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, wherein the codeword is generated by encoding input bits based on a low density parity check (LDPC) code, a code rate of the LDPC code being 2/15;
- a constellation mapper configured to map bits of the interleaved codeword to at least one of constellation points for 1024-quadrature amplitude modulation (QAM) scheme;
- and
- a transmitter configured to transmit a signal which is generated based on the constellation points,
- wherein each of the constellation points is represented as one of A+Bi, −A+Bi, A-Bi and -A-Bi, and
- wherein A is a real component, B is an imaginary component, and each of A and B comprises one of values listed below:
- 0.3317
- 0.3321
- 0.3322
- 0.3321
- 0.3327
- 0.3328
- 0.3322
- 0.3322
- 0.9369
- 0.9418
- 0.9514
- 0.9471
- 0.9448
- 0.9492
- 0.9394
- 0.9349.
19 more elements
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;
- 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, a code rate of the LDPC code being 2/15,
- wherein the signal is demodulated based on constellation points for 1024-quadrature amplitude modulation (QAM),
- wherein each of the constellation points is represented as one of A+Bi, −A+Bi, A-Bi and -A-Bi, and
- wherein A is a real component, B is an imaginary component, and each of A and B comprises one of values listed below:
- 0.3317
- 0.3321
- 0.3322
- 0.3321
- 0.3327
- 0.3328
- 0.3322
- 0.3322
- 0.9369
- 0.9418
- 0.9514
- 0.9471
- 0.9448
- 0.9492
- 0.9394
- 0.9349.
21 more elements
Dependencies are inferred from the claim text.