TRANSMITTER APPARATUS AND BIT INTERLEAVING METHOD THEREOF

• US 20190326932A1
• Filed: 07/02/2019
• Published: 10/24/2019
• Est. Priority Date: 05/21/2014
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: MYUNG, Se-ho, KIM, Kyung-joong, JEONG, Hong-sil, LOBETE, Daniel Ansorregui, MOUHOUCE, Belkacem
• Granted Patent: US 10,873,343 B2
• Time in Patent Office: Days
• CPC Class Codes: H03M 13/1102 Codes on graphs and decoding on graphs, e.g. low-density parity check [LDPC] codes
• CPC Class Codes: H03M 13/1157 Low-density generator matrices [LDGM]
• CPC Class Codes: H03M 13/1165 QC-LDPC codes as defined for the digital video broadcasting [DVB] specifications, e.g. DVB-Satellite [DVB-S2]
• CPC Class Codes: H03M 13/152 Bose-Chaudhuri-Hocquenghem [BCH] codes
• CPC Class Codes: H03M 13/253 with concatenated codes
• CPC Class Codes: H03M 13/255 with Low Density Parity Check [LDPC] codes
• CPC Class Codes: H03M 13/2707 Simple row-column interleaver, i.e. pure block interleaving
• CPC Class Codes: H03M 13/271 Row-column interleaver with permutations, e.g. block interleaving with inter-row, inter-column, intra-row or intra-column permutations
• CPC Class Codes: 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
• CPC Class Codes: H03M 13/2792 Interleaver wherein interleaving is performed jointly with another technique such as puncturing, multiplexing or routing
• CPC Class Codes: H03M 13/616 Matrix operations, especially for generator matrices or check matrices, e.g. column or row permutations
• CPC Class Codes: H04L 1/0041 Arrangements at the transmitter end
• CPC Class Codes: H04L 1/0057 Block codes H04L1/0061, H04L1/0064 take precedence
• CPC Class Codes: H04L 1/0071 Use of interleaving interleaving per se H03M13/27

Abstract

A transmitting apparatus is provided. The transmitting apparatus includes: an encoder configured to generate a low-density parity check (LDPC) codeword by LDPC encoding of input bits based on a parity check matrix including information word bits and parity bits, the LDPC codeword including a plurality of bit groups each including a plurality of bits; an interleaver configured to interleave the LDPC codeword; and a modulator configured to map the interleaved LDPC codeword onto a modulation symbol, wherein the interleaver is further configured to interleave the LDPC codeword such that a bit included in a predetermined bit group from among the plurality of bit groups constituting the LDPC codeword onto a predetermined bit of the modulation symbol.

Claims

1. 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 a 16-quadrature amplitude modulation (QAM);

a deinterleaver configured to split the values into a plurality of groups and deinterleave the plurality of groups to provide deinterleaved values; and

a decoder configured to decode the deinterleaved values based on a low density parity check (LDPC) code having a code rate being 5/15 and a code length being 16200 bits,

wherein the plurality of groups are deinterleaved based on a following equation;

Yπ

(j)=Xj for (0≤

j<

N_group),

where X_j is a j^th group among the plurality of groups, Y_j is a j^th group among the deinterleaved plurality of groups, N_group is a total number of the plurality of groups, and π

(j) denotes a deinterleaving order for the deinterleaving, and

wherein the π

(j) is represented as follows;

2. The apparatus of claim 1, wherein each of the plurality of groups comprises 360 values.

3. The apparatus of claim 1, wherein the π

(j) is determined based on at least one of the code length, a modulation method for the mapping, and the code rate.

4. A receiving method comprising:

receiving a signal from a transmitting apparatus;

demodulating the signal to generate values according to a 16-quadrature amplitude modulation (QAM);

splitting the values into a plurality of groups;

deinterleaving the plurality of groups to provide deinterleaved values; and

decoding the deinterleaved values based on a low density parity check (LDPC) code having a code rate being 5/15 and a code length being 16200 bits,

wherein the plurality of groups are deinterleaved based on a following equation;

Yπ

(j)=Xj for (0≤

j<

N_group),

where X_j is a j group among the plurality of groups, Y_j is a j^th group among the deinterleaved plurality of groups, N_group is a total number of the plurality of groups, and π

(j) denotes a deinterleaving order for the deinterleaving, and

wherein the π

(j) is represented as follows;

5. The method of claim 4, wherein each of the plurality of groups comprises 360 values.

6. The method of claim 4, wherein the π

(j) is determined based on at least one of the code length, a modulation method for the mapping, and the code rate.