Timing detection device and method thereof

Patent metadata

Field	Value
Publication number	US-12250020-B2
Application number	US-202318343564-A
Country	US
Kind code	B2
Filing date	Jun 28, 2023
Priority date	Feb 15, 2021
Publication date	Mar 11, 2025
Grant date	Mar 11, 2025

Abstract

A timing detection device includes a main reference code generation module, an auxiliary reference code generation module, a first correlation processing module, a second correlation processing module, and a subtraction module. The main reference code generation module generates a main reference code consisting of the same code for synchronization included in a received signal. Using a portion of the same code as the code for synchronization, the auxiliary reference code generation module generates an auxiliary reference code consisting of a code configuration different from the main reference code and without generating a main lobe during correlation processing. The first correlation processing module correlates the received signal with the main reference code and outputs a first correlation result. The second correlation processing module correlates the received signal with the auxiliary reference code and outputs a second correlation result. The subtraction module subtracts the first correlation result from the second correlation result.

First claim

What is claimed is:

1. A timing detection device, comprising:
processing circuitry configured:
to generate a main reference code consisting of the same code as a code for synchronization included in a received signal;
to generate, by using a portion of the same code as the code for synchronization, an auxiliary reference code consisting of a code configuration different from the main reference code and suppressing the generation of a main lobe during a correlation process;
to output a first correlation result by correlating the received signal with the main reference code;
to output a second correlation result by correlating the received signal with the auxiliary reference code; and
to subtract the first correlation result from the second correlation result.

2. The timing detection device according to claim 1 , wherein
the code for synchronization is composed of a first code sequence of a non-inversion code consisting of a prescribed spread code and an inversion code of the spread code, and
the processing circuitry is further configured to generate the auxiliary reference code using the first code sequence of the non-inversion code.

3. The timing detection device according to claim 2 , wherein
the auxiliary reference code is a sequence code of the non-inversion code.

4. The timing detection device according to claim 3 , wherein
the code for synchronization is a Barker code.

5. The timing detection device according to claim 2 , wherein
the code for synchronization is a Barker code.

6. The timing detection device according to claim 1 , wherein
the code for synchronization is composed of a second code sequence of a non-inversion code consisting of a prescribed spread code and an inversion code of the spread code, and
the processing circuitry is further configured to generate the auxiliary reference code using a sequence code of the inversion code.

7. The timing detection device according to claim 6 , wherein
the auxiliary reference code is the sequence code of the inversion code.

8. The timing detection device according to claim 7 , wherein
the code for synchronization is a Barker code.

9. The timing detection device according to claim 6 , wherein
the code for synchronization is a Barker code.

10. The timing detection device according to claim 1 , wherein
the code for synchronization is a Barker code.

11. A timing detection method, comprising:
generating a main reference code consisting of the same code as a code for synchronization included in a received signal;
generating an auxiliary reference code consisting of a code configuration different from the main reference code by using a portion of the same code as the code for synchronization and suppressing generation of a main lobe during a correlation process;
outputting a first correlation result by correlating the received signal with the main reference code;
outputting a second correlation result by correlating the received signal with the auxiliary reference code; and
subtracting the first correlation result from the second correlation result.

12. The timing detection method according to claim 11 , wherein
the code for synchronization is composed of a sequence code of a non-inversion code consisting of a prescribed spread code and an inversion code of the spread code, and the auxiliary reference code is generated using the sequence code of the non-inversion codes.

13. The timing detection method according to claim 12 , wherein
the auxiliary reference code is the sequence code of the non-inversion code.

14. The timing detection method according to claim 11 , wherein
the code for synchronization is composed of a sequence code of a non-inversion code consisting of a prescribed spread code and an inversion code of the spread code, and the auxiliary reference code is generated using a sequence code of the inversion codes.

15. The timing detection method according to claim 14 , wherein
the auxiliary reference code (C 52 A) is the sequence code of the inversion code.

16. A non-transitory computer readable medium having instructions to cause a processing unit to execute processing, the processing comprising:
generating a main reference code consisting of the same code as a code for synchronization included in a received signal;
generating an auxiliary reference code consisting of a code configuration different from the main reference code by using a portion of the same code as the code for synchronization and suppressing generation of a main lobe during a correlation process;
outputting a first correlation result by correlating the received signal with the main reference code;
outputting a second correlation result by correlating the received signal with the auxiliary reference code; and
subtracting the first correlation result from the second correlation result.

17. The non-transitory computer readable medium according to claim 16 , wherein
the code for synchronization is composed of a sequence code of a non-inversion code consisting of a prescribed spread code and an inversion code of the spread code, and the auxiliary reference code is generated using the sequence code of the non-inversion codes.

18. The non-transitory computer readable medium according to claim 17 , wherein
the auxiliary reference code is the sequence code of the non-inversion code.

19. The non-transitory computer readable medium according to claim 16 , wherein
the code for synchronization is composed of a sequence code of a non-inversion code consisting of a prescribed spread code and an inversion code of the spread code, and the auxiliary reference code is generated using a sequence code of the inversion codes.

20. The non-transitory computer readable medium according to claim 19 , wherein
the auxiliary reference code is the sequence code of the inversion code.

Assignees

• Furuno Electric Co
• Furuno Electric Co

Inventors

• Kimura Daisuke
• Toyoda Yusuke

Classifications

• H04L7/04

  Speed or phase control by synchronisation signals {(H04L7/0075 takes precedence)} · CPC title

• H04B1/7073 Primary

  Synchronisation aspects · CPC title

• H04J13/0011

  Complementary · CPC title

• H04L7/042 Primary

  Detectors therefor, e.g. correlators, state machines (digital correlators in general G06F17/15) · CPC title