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Method and device for calibrating local clock based on satellite time service

A technology of local clock and satellite timing, which is applied in the field of wireless communication and can solve the problem of the lack of effective implementation method of satellite precise time automatic calibration technology.

Active Publication Date: 2012-07-11
华力智芯(成都)集成电路有限公司
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0006] In the prior art, there is no effective method for realizing satellite accurate time automatic calibration technology

Method used

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  • Method and device for calibrating local clock based on satellite time service
  • Method and device for calibrating local clock based on satellite time service
  • Method and device for calibrating local clock based on satellite time service

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Embodiment 2

[0033] This embodiment provides a device for calibrating a local clock based on satellite timing, and its specific structure is as follows Figure 4 As shown, the following modules are included:

[0034] The frequency multiplication clock acquisition module 41 is used to utilize the digital phase-locked loop to perform frequency multiplication processing on the local clock signal to obtain the frequency multiplication clock;

[0035] The counting difference acquisition module 42 is used to perform frequency counting on the satellite clock signal received by the satellite receiver to obtain the corresponding count value of the satellite clock signal by using the multiplied clock acquired by the frequency multiplied clock acquisition module, and the The count value is subtracted from the count value corresponding to the local standard clock to obtain the count difference;

[0036] The clock calibration module 43 is configured to obtain the clock offset between the local clock s...

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Abstract

The embodiment of the invention provides a method and a device for calibrating a local clock based on satellite time service. The method mainly comprises the following steps of: performing frequency multiplication on a local clock signal by using a digital phase-locked loop to acquire a frequency multiplication clock; performing frequency counting on a satellite clock signal received by a satellite receiver by using the frequency multiplication clock to acquire a count value corresponding to the satellite clock signal, and subtracting the count value from a count value corresponding to a local standard clock to acquire a count difference value; and acquiring clock offset between the local clock signal and the satellite clock signal according to the count difference value, and calibrating the local clock according to the clock offset. By the method and the device provided by the embodiment of the invention, the satellite clock signal is subjected to frequency counting through the frequency multiplication clock, so that the offset between the local clock signal and a clock signal output by a global positioning system (GPS) / Beidou satellite navigation system can be quickly acquired, and input parameters can be provided for a local clock control algorithm.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a method and device for calibrating a local clock based on satellite timing. Background technique [0002] For a modernized country entering the information society, the navigation, positioning and timing system is the most important and one of the most critical national infrastructures. Precision time is a basic physical parameter in scientific research, scientific experiment and engineering technology, and it can provide an essential time-base coordinate for the measurement and quantitative research of all dynamical systems and time series processes. Precision timing has extensive and important applications in industrial fields such as communication, electric power, control, and national defense. [0003] GPS (Global Positioning System, Global Positioning System) is a new generation of space satellite navigation and positioning system. Its main purpose is to provide real-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G04G5/00G04G7/02G04R20/04G04R40/00
Inventor 王德贵李夏
Owner 华力智芯(成都)集成电路有限公司
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