METHOD AND SYSTEM FOR GENERATING CHANNEL CODES, IN PARTICULAR FOR A FRAME-HEADER

• US 20150244491A1
• Filed: 09/24/2013
• Published: 08/27/2015
• Est. Priority Date: 09/25/2012
• Status: Active Grant

• Current Assignee: Politecnico De Torino
• Original Assignee: Politecnico di Torino
• Inventors: Montorsi, Guido, Kayhan, Farbod
• Granted Patent: US 9,692,542 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H03M 13/136 Reed-Muller [RM] codes
• CPC Class Codes: H03M 13/251 with block coding
• CPC Class Codes: H03M 13/2906 using block codes H03M13/2957 takes precedence
• CPC Class Codes: H03M 13/356 Unequal error protection [UEP]
• CPC Class Codes: H04J 13/10 Code generation
• CPC Class Codes: H04L 1/0003 by switching between different modulation schemes
• CPC Class Codes: H04L 1/001 applied to control information
• CPC Class Codes: H04L 1/0057 Block codes H04L1/0061, H04L1/0064 take precedence
• CPC Class Codes: H04L 1/0064 Concatenated codes
• CPC Class Codes: H04L 1/007 Unequal error protection for format H04L1/0078; for codes per se H03M13/35
• CPC Class Codes: H04L 69/22 Parsing or analysis of headers
• CPC Class Codes: H04W 72/0466 the resource being a scrambling code

Abstract

A method for generating a channel code, in particular for a frame-header, wherein at least a code-word of the channel code is obtained by means of at least a concatenation of code-words of two constituent codes and such concatenation is performed on subsets of code-words of a first constituent code, having maximum length, with code-words of a second constituent code.

Claims

1. A method for generating a channel code, in particular for a frame-header, wherein at least a code-word of said channel code is obtained by means of at least a concatenation of code-words of two constituent codes and said concatenation is performed on subsets of code-words of a first constituent code, having maximum length, with code-words of a second constituent code.

2. The method according to claim 1, wherein said at least a code-word of said constituent codes is encapsulated into a code-word of said channel code.

3. The method according to claim 1, wherein said at least a code-word of said channel code has length greater than remaining code-words of said channel code.

4. The method according to claim 1, wherein a minimum distance of said constituent codes depends on signal to noise ratios, which are associated with user types and they are different from each said user type, and depends on a detection error rate.

5. The method according to claim 1, wherein said minimum distance is computed for each said user type.

6. The method according to claim 1, wherein a maximum code-word length of said channel code is obtained by the formula N_i=Σ

_m=1^M n_m where M is the maximum number of said code-words of said channel code corresponding to an highest said signal to noise ratio, m is an integer index varying from one to M and is a length of said code-word of said constituent code at index m.

7. The method according to claim 1, wherein said code-words of said channel code have variable length.

8. The method according to claim 1, wherein said constituent codes are known linear codes.

9. The method according to claim 1, wherein said at least a code-word of said channel code comprises a sequence of bits having values equal to zero to equalize the length of said at least a code-word.

10. The method according to claim 9, wherein said code-words of said channel code have fixed length.

11. The method according to claim 1, wherein said channel code is an UEP code.

12. The method according to claim 1, wherein said channel codes are suitable to be used for a frame-header of a data packet of a communication system.

13. A system for generating channel codes, comprising at least an encoder for carrying out the method according to claim 1.

14. The system according to claim 13, wherein said encoder is suitable to be used in a communication system.

15. The system according to claim 14, wherein said communication system comprises a plurality of user types having different signal to noise ratios.

16. The system according to claim 14, wherein said communication system is an ACM (“

Adaptive Coding and Modulation”

) communication system.