Apparatus and method for transmitting and receiving signal in communication system supporting rate compatible low density parity check code

Patent metadata

Field	Value
Publication number	US-2017201348-A1
Application number	US-201715400304-A
Country	US
Kind code	A1
Filing date	Jan 6, 2017
Priority date	Jan 8, 2016
Publication date	Jul 13, 2017
Grant date	—

Abstract

The present disclosure relates to a pre-5th-generation (5G) or 5G communication system to be provided for supporting higher data rates beyond 4th-generation (4G) communication system such as a long term evolution (LTE). A method and apparatus for transmitting a signal in a transmitting apparatus in a communication system supporting a rate compatible-low density parity check (RC-LDPC) code are provided. The method includes encoding information bits based on a first parity check matrix and a first code rate to generate a codeword, processing the codeword to generate a transmission signal, and transmitting the transmission signal.

First claim

What is claimed is:

1 . A method for transmitting a signal in a transmitting apparatus in a communication system supporting a rate compatible-low density parity check (RC-LDPC) code, the method comprising:
encoding information bits based on a first parity check matrix and a first code rate to generate a codeword; processing the codeword to generate a transmission signal; and transmitting the transmission signal, wherein the first parity check matrix comprises:
a second parity check matrix supporting a second code rate;
a third parity check matrix supporting a third code rate;
a sub-matrix used for concatenating the second parity check matrix and the third parity check matrix; and
a fourth parity check matrix shared with the second parity check matrix, the third parity check matrix, and the sub-matrix, and
wherein the fourth parity check matrix is a parity check matrix supporting a maximum code rate among code rates supported in the communication system.

2 . The method of claim 1 , wherein, if the first code rate is greater than the second code rate and the first code rate is less than or equal to the maximum code rate, the processing of the codeword to generate the transmission signal comprises generating the transmission signal by puncturing all parity bits generated corresponding to the third parity check matrix and a part of parity bits generated corresponding to the second parity check matrix from the codeword.

3 . The method of claim 1 , wherein, if the first code rate is less than or equal to the second code rate, the processing of the codeword to generate the transmission signal comprises generating the transmission signal by puncturing all parity bits generated corresponding to the second parity check matrix from the codeword.

4 . The method of claim 1 , wherein, if the first code rate is less than or equal to the second code rate, the processing of the codeword to generate the transmission signal comprises generating the transmission signal by shortening all parity bits generated corresponding to the second parity check matrix from the codeword.

5 . The method of claim 1 , further comprising:
detecting that a receiving apparatus fails in decoding the transmission signal; generating an additional transmission signal; and transmitting the additional transmission signal to the receiving apparatus.

6 . The method of claim 5 , wherein, if the first code rate is greater than the second code rate and the first code rate is less than or equal to the maximum code rate, the generating of the additional transmission signal comprises:
generating parity bits, which correspond to the second parity check matrix, as the additional transmission signal, until a code rate applied to the additional transmission signal reaches the second code rate; and generating parity bits, which correspond to the third parity check matrix, as the additional transmission signal, if the code rate applied to the additional transmission signal is less than the second code rate.

7 . The method of claim 5 , wherein, if the first code rate is greater than the second code rate and the first code rate is less than or equal to the maximum code rate, the generating of the additional transmission signal comprises:
generating parity bits, which correspond to the second parity check matrix, as the additional transmission signal, until a code rate applied to the additional transmission signal reaches the second code rate; and generating parity bits, which correspond to a parity check matrix concatenated after the third parity check matrix, as the additional transmission signal, if the code rate applied to the additional transmission signal is less than the second code rate.

8 . The method of claim 5 , wherein, if the first code rate is less than or equal to the second code rate, the generating of the additional transmission signal comprises:
generating parity bits, which correspond to the second parity check matrix, as the additional transmission signal, until a code rate applied to the additional transmission signal reaches the second code rate; and generating parity bits, which correspond to the third parity check matrix, as the additional transmission signal, if the code rate applied to the additional transmission signal is less than the second code rate.

9 . The method of claim 5 , wherein, if the first code rate is less than or equal to the second code rate, the generating of the additional transmission signal comprises:
generating parity bits, which correspond to the third parity check matrix, as the additional transmission signal, until a code rate applied to the additional transmission signal reaches the second code rate; and generating the additional transmission signal as an inverse order of parity bits, which correspond to the second parity check matrix, if the code rate applied to the additional transmission signal is less than the second code rate.

10 . The method of claim 5 , wherein, if the first code rate is less than or equal to the second code rate, the generating of the additional transmission signal comprises:
generating parity bits, which correspond to the third parity check matrix, as the additional transmission signal, until a code rate applied to the additional transmission signal reaches the second code rate; and generating parity bits, which correspond to a parity check matrix concatenated after the third parity check matrix, as the additional transmission signal, if the code rate applied to the additional transmission signal is less than the second code rate.

11 . A transmitting apparatus in a communication system supporting a rate compatible-low density parity check (RC-LDPC) code, the transmitting apparatus comprising:
a processor configured to perform:
encoding of information bits based on a first parity check matrix and a first code rate to generate a codeword,
processing of the codeword to generate a transmission signal, and
transmitting of the transmission signal,
wherein the first parity check matrix comprises:
a second parity check matrix supporting a second code rate;
a third parity check matrix supporting a third code rate;
a sub-matrix used for concatenating the second parity check matrix and the third parity check matrix; and
a fourth parity check matrix shared with the second parity check matrix, the third parity check matrix, and the sub-matrix, and
wherein the fourth parity check matrix is a parity check matrix supporting a maximum code rate among code rates supported in the communication system.

12 . The transmitting apparatus of claim 11 , wherein, if the first code rate is greater than the second code rate and the first code rate is less than or equal to the maximum code rate, the processing of the codeword to generate the transmission signal comprises generating the transmission signal by puncturing all parity bits generated corresponding to the third parity check matrix and a part of parity bits generated corresponding to the second parity check matrix from the codeword.

13 . The transmitting apparatus of claim 11 , wherein, if the first code rate is less than or equal to the second code rate, the processing of the codeword to generate the transmission signal comprises generating the transmission signal by puncturing all parity bits generated corresponding to the second parity check matrix from the codeword.

14 . The transmitting apparatus of claim 11 , wherein, if the first code rate is less than or equal to the second code rate, the processing of the codeword to generate the transmission signal comprises generating the transmission signal by shortening all pa

Assignees

• Samsung Electronics Co Ltd

Inventors

• Jang Min
• Ahn Seok-Ki
• Lim Chi-Woo
• Kim Jae-Yoel
• Park Woo-Myoung

Classifications

• H04L1/0068 Primary

  by puncturing · CPC title

• H03M13/036

  Heuristic code construction methods, i.e. code construction or code search based on using trial-and-error · CPC title

• H03M13/616

  Matrix operations, especially for generator matrices or check matrices, e.g. column or row permutations · CPC title

• H03M13/1148

  Structural properties of the code parity-check or generator matrix · CPC title

• H03M13/1185

  wherein the parity-check matrix comprises a part with a double-diagonal · CPC title