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

A technology of local clock and satellite time service, applied in the field of wireless communication, can solve the problem that there is no effective implementation method of satellite precise time automatic calibration technology

Active Publication Date: 2014-04-02
华力智芯(成都)集成电路有限公司
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  • Abstract
  • Description
  • Claims
  • 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 time service, and its specific structure is as follows Figure 4 As shown, including the following modules:

[0034] The frequency-multiplied clock acquisition module 41 is configured to use a digital phase-locked loop to multiply the frequency of the local clock signal to obtain a frequency-multiplied clock;

[0035] The count difference obtaining module 42 is configured to use the frequency multiplied clock obtained by the frequency multiplier clock obtaining module to perform frequency counting on the satellite clock signal received by the satellite receiver to obtain the count value corresponding to the satellite clock signal, and 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 deviation between the local clock signal and the satellite clock...

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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 present invention relates to the field of wireless communication, and in particular to a method and device for calibrating a local clock based on satellite timing. Background technique [0002] For a modern country entering the information society, navigation and positioning and timing systems are the most important and one of the most critical national infrastructures. Precise time is the basic physical parameter in scientific research, scientific experiment and engineering technology. It can provide the necessary time base coordinates for the measurement and quantitative research of all dynamic systems and time series processes. Precision timing has a wide range of important applications in the fields of communications, power, control and other industrial and national defense fields. [0003] GPS (Global Positioning System, Global Positioning System) is a new generation of space satellite navigation and positioning system. Its main purpose is to provid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G04R20/04G04R40/00
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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