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US 11,082,064 B2Granted
Transmitting apparatus and mapping method thereof
AssigneeSamsung Electronics Co., Ltd.
InventorsBelkacem Mouhouche, Daniel Ansorregui Lobete, 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 broadcast signal receiving apparatus comprising:
- a receiver configured to receive a signal from a broadcast signal 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 13/15,
- wherein the signal is demodulated based on constellation points for 1024-quadrature amplitude modulation (QAM), and
- wherein each of the constellation points is represented as 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:
- 0.0325
- 0.0967
- 0.1623
- 0.2280
- 0.2957
- 0.3645
- 0.4361
- 0.5100
- 0.5878
- 0.6696
- 0.7566
- 0.8497
- 0.9498
- 1.0588
- 1.1795
- 1.3184.
21 more elements
A transmitting apparatus comprising:
- an interleaver configured to interleave a codeword comprising input bits and parity bits, 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 13/15;
- a mapper configured to demultiplex bits of the interleaved codeword to generate cells and map the cells to constellation points for 1024-quadrature amplitude modulation (QAM);
- and
- a transmitter configured to transmit a signal which is generated 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 is one of values listed below:
- 0.0325
- 0.0967
- 0.1623
- 0.2280
- 0.2957
- 0.3645
- 0.4361
- 0.5100
- 0.5878
- 0.6696
- 0.7566
- 0.8497
- 0.9498
- 1.0588
- 1.1795
- 1.3184.
18 more elements
Dependencies are inferred from the claim text.