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US 11,082,278 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.
Claims3
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 4096-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:
- 0.2038
- 0.2038
- 0.2155
- 0.2155
- 0.2155
- 0.2155
- 0.2097
- 0.2038
- 0.2796
- 0.2912
- 0.3029
- 0.2970
- 0.2970
- 0.3029
- 0.2796
- 0.2796
- 0.7222
- 0.7397
- 0.7455
- 0.7339
- 0.7397
- 0.7513
- 0.7455
- 0.7339
- 1.3046
- 1.0833
- 0.9785
- 1.0134
- 0.9901
- 0.9610
- 1.0658
- 1.6424.
35 more elements
A receiving apparatus comprising:
- a demodulator configured to demodulate a signal received from a transmitting apparatus 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 signal is demodulated based on constellation points for 4096-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:
- 0.2038
- 0.2038
- 0.2155
- 0.2155
- 0.2155
- 0.2155
- 0.2097
- 0.2038
- 0.2796
- 0.2912
- 0.3029
- 0.2970
- 0.2970
- 0.3029
- 0.2796
- 0.2796
- 0.7222
- 0.7397
- 0.7455
- 0.7339
- 0.7397
- 0.7513
- 0.7455
- 0.7339
- 1.3046
- 1.0833
- 0.9785
- 1.0134
- 0.9901
- 0.9610
- 1.0658
- 1.6424.
35 more elements
Dependencies are inferred from the claim text.