Method and apparatus for compensating clock bias

A clock deviation and clock drift technology, applied in the field of global navigation satellite system receivers, can solve the problems of inaccurate initial value of GNSS time, large real-time clock deviation value, etc., and achieve the effect of reducing the first positioning time

Inactive Publication Date: 2011-11-16
MEDIATEK INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Over time, during the power-off period of the GNSS receiver, the RTC bias value will become larger and larger as the RTC drift value accumulates, which makes the initial value of GNSS time imprecise

Method used

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  • Method and apparatus for compensating clock bias
  • Method and apparatus for compensating clock bias
  • Method and apparatus for compensating clock bias

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Embodiment Construction

[0013] Certain terms are used throughout the description and claims to refer to particular components. Those of ordinary skill in the art will understand that 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. "Include" and "comprising" mentioned throughout the specification and claims are open-ended terms, so they should be interpreted as "including but not limited to". Otherwise, the term "coupled" includes any direct and indirect means of electrical connection. Indirect means of electrical connection includes connection through other means.

[0014] see figure 1 , figure 1 According to the first embodiment of the present invention, used in GNSS receivers to compensate clock bias B bias A schematic diagram of the device 100. According to an option of the first embodiment...

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Abstract

The invention relates to a method and an apparatus for compensating clock bias, wherein the apparatus for compensating clock bias which is applied to a Global Navigation Satellite System (GNSS) receiver comprises a clock source for providing a reference time which has a clock bias to be compensated and a processing module which is coupled to the clock source for deriving at least one clock drifting value. The clock drifting value contains a first clock drifting value corresponding to a first time point. The clock bias is calculated according to the at least one clock drifting time and at least one time section, wherein the at least one time section is a time period between the first time point and a special time point after the first time point. The method and the apparatus provided by the invention can derive the time information and obviously decrease the first locating time.

Description

technical field [0001] The present invention relates to a global navigation satellite system (Global Navigation Satellite System, GNSS) receiver, and more specifically, the present invention relates to a method and device for compensating clock bias. Background technique [0002] One of the most important issues with GNSS receivers is how to obtain accurate GNSS time when the GNSS receiver goes from power off mode to start up mode. Typically, in the GNSS receiver, other components except the Real Time Clock (RTC) are powered down in the power-off mode. According to the prior art, when the GNSS receiver is powered on, the common way to obtain the initial GNSS time is to read the real-time clock time provided by the real-time clock as the Coordinated Universal Time (Coordinated Universal Time, also known as UTC) ), and then further directly convert the UTC obtained from the real-time clock into a rough initial value of GNSS time. [0003] Please note that the real-time clock...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G04G5/00G01S5/02G01S1/02H03L7/00G06F17/00
CPCG04R40/06G04G3/04
Inventor 黄工栓叶育祺
Owner MEDIATEK INC
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