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Handheld device and frequency tracking method

A hand-held device, frequency tracking technology, applied in the shaping network, electrical components, transmission system, etc.

Active Publication Date: 2018-09-07
MEDIATEK INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current frequency tracking mechanism only uses periodic signals from the paging channel and cannot handle large frequency offsets, so the associated modem channel reception may fail

Method used

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  • Handheld device and frequency tracking method
  • Handheld device and frequency tracking method
  • Handheld device and frequency tracking method

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Embodiment Construction

[0019] Certain terms are used in the description and claims to refer to particular components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. The specification and claims do not use the difference in name as a way to distinguish components, but use the difference in function of components as a criterion for distinguishing. "Includes" and "comprises" mentioned throughout the description and claims are open-ended terms, so they should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve the technical problem within a certain error range and basically achieve the technical effect. In addition, the term "coupled" includes any direct and indirect electrical connection means. Therefore, if it is described in the text that a first device is coupled to a second device, it means that the first device may be direct...

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Abstract

The invention provides at least one handheld device and a frequency tracking method thereof. One of the handheld devices comprises an oscillator, being configured to generate an oscillation signal; a radio frequency (RF) chip, being electrically connected to the oscillator and configured to receive a paging signal from a paging channel and an RF signal from a non-regular channel based on the oscillation signal; a modem module, being electrically connected to the RF chip; a first thermal sensor, being disposed close to the oscillator and configured to measure a heat source temperature; and a thermal module, being electrically connected to the modem module and the first thermal sensor and configured to enable the modem module to execute a frequency compensation process by using the RF signal or both the paging signal and the RF signal according to the heat source temperature. The handheld device of the present invention timely triggers a modem module to execute a frequency compensation process according to a temperature at the ambient of the oscillator, to effectively reduce receiving failure of channels of a modem caused by large frequency offset caused by the temperature of the oscillator.

Description

technical field [0001] The present invention relates to a handheld device and its frequency tracking method. More specifically, the handheld device of the present invention triggers the modem module to perform a frequency compensation operation according to the temperature of the heat source, so as to reduce the influence of the frequency offset of the oscillator (oscillator) caused by the heat source (heat source). Background technique [0002] With the development of communication technology, wireless handheld devices have been widely used in people's daily life. In order to meet the compact design of the handheld device, it is difficult to avoid arranging the oscillator near the baseband (BB) processor, and the baseband processor is a critical heat source of the handheld device. [0003] Because the frequency of the oscillator is sensitive to changes in temperature, large changes in temperature (eg, when the baseband processor becomes busy or shuts down) can cause large ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/03H04B1/40
Inventor 方俊仁吴庆昇吴孟霖王志铭张乔智
Owner MEDIATEK INC