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Frequency calibration method, terminal and storage medium

A terminal and frequency compensation technology, applied to instruments, measuring devices, electrical components, etc., can solve problems such as poor frequency compensation effect and large frequency deviation

Pending Publication Date: 2019-10-08
GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the learning sampling and self-calibration of crystal oscillators require certain trigger conditions and processing time, and these delays will lead to large frequency deviations and poor frequency compensation effects

Method used

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  • Frequency calibration method, terminal and storage medium
  • Frequency calibration method, terminal and storage medium
  • Frequency calibration method, terminal and storage medium

Examples

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Effect test

Embodiment 1

[0058] The embodiment of the present application provides a frequency calibration method, such as figure 2 As shown, the method may include:

[0059] S101. Determine a frequency deviation value according to a signal frequency generated by a crystal oscillator and a standard frequency, where the standard frequency is a sending frequency when a sending end sends a signal.

[0060] A frequency calibration method provided in an embodiment of the present application is applicable to a scenario of performing frequency calibration on a clock frequency of a terminal device.

[0061] It should be noted that, ideally, the signal frequency provided by the crystal oscillator at different operating temperatures should be the standard signal frequency, but in actual application, due to the influence of temperature, the crystal oscillator actually operates at different temperatures. The signal frequency provided below cannot reach the standard signal frequency, therefore, frequency compens...

Embodiment 2

[0092] The embodiment of the present application provides a terminal 1, such as Image 6 As shown, the terminal 1 may include:

[0093] The determination unit 10 is configured to determine a frequency deviation value according to a signal frequency generated by the crystal oscillator and a standard frequency, the standard frequency being the transmission frequency when the transmission terminal transmits the signal;

[0094] A calling unit 11, configured to call a dynamic frequency compensation parameter when the frequency deviation value is greater than a preset frequency deviation threshold;

[0095] The frequency compensation unit 12 is configured to adjust the dynamic frequency compensation parameters, and use the adjusted dynamic frequency compensation parameters to perform frequency compensation until the dynamic frequency deviation value after frequency compensation meets the frequency deviation standard, and complete the frequency compensation. process.

[0096] Opti...

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Abstract

The embodiment of the invention provides a frequency calibration method, a terminal and a storage medium, and the method comprises the steps: determining a frequency deviation value according to a signal frequency and a standard frequency generated by a crystal oscillator, the standard frequency being a sending frequency when a sending end sends a signal; when the frequency deviation value is greater than a preset frequency deviation threshold, calling a dynamic frequency compensation parameter; and adjusting the dynamic frequency compensation parameter, and performing frequency compensation by using the adjusted dynamic frequency compensation parameter until the dynamic frequency deviation value after frequency compensation meets the frequency deviation standard to complete the frequencycompensation process.

Description

technical field [0001] The present application relates to the technical field of crystal oscillators, in particular to a frequency calibration method, a terminal and a storage medium. Background technique [0002] In the positioning principle of the Global Navigation Satellite System (GNSS), the distance between the satellite and the terminal device is estimated by multiplying the time when the satellite transmits the signal to the GNSS receiving module by the propagation speed of the electromagnetic wave. Therefore, the clock accuracy of terminal equipment will directly affect the positioning accuracy of GNSS. [0003] The crystal oscillator can generate a very stable resonant frequency. As the clock frequency of the terminal equipment, since the frequency is the reciprocal of time, in order to improve the clock accuracy, it is necessary to compensate the frequency error of the crystal oscillator caused by temperature. [0004] In the prior art, a set of C parameters is us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03L1/02G01S19/23
CPCH03L1/022G01S19/235
Inventor 杨鑫
Owner GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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