# US 11,115,259 B2 · Transmitting apparatus and mapping method thereof

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- Number: US 11,115,259 B2
- Document ID: US11115259B2
- Status: Granted
- Kind: B2
- Application number: 16/921,201
- Filed: 2020-07-06
- Published: 2020-10-22
- Granted: 2021-09-07
- Earliest claimed: 2015-05-19
- Assignees: Samsung Electronics Co., Ltd.
- Applicants: Samsung Electronics Co., Ltd.
- Inventors: Se-ho Myung; Belkacem Mouhouche; Daniel Ansorregui Lobete; Kyung-joong Kim; Hong-sil Jeong
- Web page: https://patentgrep.com/patent/US11115259B2

## CPC

- H03M 13/255: {with Low Density Parity Check [LDPC] codes}
- H04L 27/34: Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
- H03M 13/1165: {QC-LDPC codes as defined for the digital video broadcasting [DVB] specifications, e.g. DVB-Satellite [DVB-S2]}
- H03M 13/271: {Row-column interleaver with permutations, e.g. block interleaving with inter-row, inter-column, intra-row or intra-column permutations}
- H03M 13/2778: {Interleaver using block-wise interleaving, e.g. the interleaving matrix is sub-divided into sub-matrices and the permutation is performed in blocks of sub-matrices}
- H04L 1/0071: {Use of interleaving (interleaving per se H03M13/27)}
- H04L 27/2647: {Arrangements specific to the receiver only (equalisation H04L27/01)}
- H03M 13/152: {Bose-Chaudhuri-Hocquenghem [BCH] codes}
- H03M 13/253: {with concatenated codes}
- H04L 1/0041: {Arrangements at the transmitter end}
- H04L 1/0057: {Block codes (H04L1/0061, H04L1/0064 take precedence)}
- H04L 5/0007: {the frequencies being orthogonal, e.g. OFDM(A) or DMT}
- H04L 2001/0093: {Point-to-multipoint}
- H03M: CODING; DECODING; CODE CONVERSION IN GENERAL (using fluidic means F15C4/00; optical analogue/digital converters G02F7/00; coding, decoding or code conversion, specially adapted for particular applications, see the relevant subclasses, e.g. G01D, G01R, G06F, G06T, G09G, G10L, G11B, G11C, H04B, H04L, H04M, H04N; ciphering or deciphering for cryptography or other purposes involving the need for secrecy G09C)
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)

## 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.

## Claims

### Claim 1

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.

### Claim 2 (depends on 1)

The apparatus as claimed in claim 1, wherein the interleaver is configured to split the codeword into a plurality of bit groups, and interleave the plurality of bit groups.

### Claim 3

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.

### Claim 4 (depends on 3)

The apparatus as claimed in claim 3, further comprising:
a deinterleaver configured to deinterleave the values,
wherein the decoder is configured to decode the deinterleaved values based on the LDPC code having the code rate being 3/15.