Parity puncturing device for fixed-length signaling information encoding, and parity puncturing method using same

Patent metadata

Field	Value
Publication number	US-10812104-B2
Application number	US-201916353378-A
Country	US
Kind code	B2
Filing date	Mar 14, 2019
Priority date	Feb 27, 2015
Publication date	Oct 20, 2020
Grant date	Oct 20, 2020

Abstract

A parity puncturing apparatus and method for fixed length signaling information are disclosed. A parity puncturing apparatus according to an embodiment of the present invention includes memory configured to provide a parity bit string for parity puncturing for the parity bits of an LDPC codeword whose length is 16200 and whose code rate is 3/15, and a processor configured to puncture a number of bits corresponding to a final puncturing size from the rear side of the parity bit string.

First claim

The invention claimed is:

1. A parity puncturing method, comprising:
calculating a final puncturing size;

puncturing a number of bits corresponding to the final puncturing size on a rear side of a parity bit string for parity puncturing for parity bits of an LDPC codeword whose length is 16200 and whose code rate is 3/15,
wherein
the final puncturing size is calculated using a temporary puncturing size, a number of transmission bits, and a temporary number of transmission bits;
the number of transmission bits is calculated using the temporary number of transmission bits and a modulation order;
the temporary number of transmission bits is calculated using a difference between a sum of a length of a BCH-encoded bit string and 12960, and the temporary puncturing size; and
the temporary puncturing size is calculated using a first integer, multiplied by a difference between a length of an LDPC information bit string and the length of the BCH-encoded bit string, and a second integer different from the first integer,
wherein the second integer is 9360, the modulation order is 2 that corresponds to the QPSK and the first integer is 0 so that the temporary puncturing size is calculated without considering the difference between the length of the LDPC information bit string and the length of the BCH-encoded bit string.

2. The parity puncturing method of claim 1 , wherein the LDPC codeword includes zero-padded fixed length signaling information as information bits.

3. The parity puncturing method of claim 1 , wherein the parity bit string is generated by segmenting the parity bits of the LDPC codeword into a plurality of groups and then group-wise interleaving the groups using an order of group-wise interleaving.

4. The parity puncturing method of claim 3 , wherein the order of group-wise interleaving corresponds to a sequence [20 23 25 32 38 41 18 9 10 11 31 24 14 15 26 40 33 19 28 34 16 39 27 30 21 44 43 35 42 36 12 13 29 22 37 17].

Assignees

• Electronics & Telecommunications Res Inst

Inventors

• Park Sung-Ik
• Kwon Sun-Hyoung
• Lee Jae-Young
• Kim Heung-Mook

Classifications

• H03M13/6552

  DVB-T2 · CPC title

• H03M13/6393

  Rate compatible low-density parity check [LDPC] codes · CPC title

• H03M13/2792 Primary

  Interleaver wherein interleaving is performed jointly with another technique such as puncturing, multiplexing or routing · CPC title

• H03M13/1165

  QC-LDPC codes as defined for the digital video broadcasting [DVB] specifications, e.g. DVB-Satellite [DVB-S2] · CPC title

• H03M13/116 Primary

  Quasi-cyclic LDPC [QC-LDPC] codes, i.e. the parity-check matrix being composed of permutation or circulant sub-matrices · CPC title