公开(公告)号：US09456431B2

公开(公告)日：2016-09-27

申请号：US14319769

申请日：2014-06-30

Applicant: Maxlinear, Inc.

Inventor： Curtis Ling ,  Xing Tan ,  Hyungjin Kim

IPC: G06F1/12 ,  H04W56/00 ,  G01S19/23 ,  H03L1/02

CPC classification number: H04W56/001 ,  G01S19/14 ,  G01S19/235 ,  G06F1/12 ,  H03L1/02 ,  H03L1/026

Abstract: Methods and systems for precise temperature and timebase PPM error estimation using multiple timebases may comprise in an electronic device comprising a plurality of timebases and measuring a temperature corresponding to the timebases. Frequencies of the timebases at the measured temperature may be compared to determine differential error functions for the timebases. A fine reading of the temperature corresponding to the timebases may be generated based, at least in part, on the measured temperature and the determined differential error functions for the timebases. The timebases may be calibrated utilizing the generated fine reading of the temperature. The timebases may comprise different order temperature dependencies. Models of temperature dependencies of each of the timebases based may be updated, at least in part, on the fine reading of the temperature. A global navigation satellite system (GNSS) clock signal may be periodically utilized to improve the accuracy of the calibration of the timebases.

Abstract translation: 用于精确温度和时基的方法和系统使用多个时基的PPM误差估计可以包括在包括多个时基并且测量对应于时基的温度的电子设备中。 可以比较测量温度下时基的频率，以确定时基的差分误差函数。 至少部分地基于所测量的温度和确定的时间基差分误差函数来生成对应于时间基的温度的精细读数。 可以利用生成的温度读数来校准时基。 时间基可以包括不同的顺序温度依赖性。 每个基于时间基的温度依赖性的模型可以至少部分地基于对温度的精细读取来更新。 周期性地使用全球导航卫星系统（GNSS）时钟信号来提高时基的校准精度。

公开(公告)号：US20140314070A1

公开(公告)日：2014-10-23

申请号：US14319769

申请日：2014-06-30

Applicant: MAXLINEAR, INC.

Inventor： Curtis Ling ,  Xing Tan ,  Hyungjin Kim

IPC: H04W56/00 ,  G06F1/12

CPC classification number: H04W56/001 ,  G01S19/14 ,  G01S19/235 ,  G06F1/12 ,  H03L1/02 ,  H03L1/026

Abstract: Methods and systems for precise temperature and timebase PPM error estimation using multiple timebases may comprise in an electronic device comprising a plurality of timebases and measuring a temperature corresponding to the timebases. Frequencies of the timebases at the measured temperature may be compared to determine differential error functions for the timebases. A fine reading of the temperature corresponding to the timebases may be generated based, at least in part, on the measured temperature and the determined differential error functions for the timebases. The timebases may be calibrated utilizing the generated fine reading of the temperature. The timebases may comprise different order temperature dependencies. Models of temperature dependencies of each of the timebases based may be updated, at least in part, on the fine reading of the temperature. A global navigation satellite system (GNSS) clock signal may be periodically utilized to improve the accuracy of the calibration of the timebases.

Abstract translation: 用于精确温度和时基的方法和系统使用多个时基的PPM误差估计可以包括在包括多个时基并且测量对应于时基的温度的电子设备中。 可以比较测量温度下时基的频率，以确定时基的差分误差函数。 至少部分地基于所测量的温度和确定的时间基差分误差函数来生成对应于时间基的温度的精细读数。 可以利用生成的温度读数来校准时基。 时间基可以包括不同的顺序温度依赖性。 每个基于时间基的温度依赖性的模型可以至少部分地基于对温度的精细读取来更新。 周期性地使用全球导航卫星系统（GNSS）时钟信号来提高时基的校准精度。

公开(公告)号：US20180324724A1

公开(公告)日：2018-11-08

申请号：US16037780

申请日：2018-07-17

Applicant: Maxlinear, Inc.

Inventor： Curtis Ling ,  Xing Tan ,  Hyungjin Kim

IPC: H04W56/00 ,  G06F1/12 ,  H03L1/02 ,  G01S19/23 ,  G01S19/14

CPC classification number: H04W56/001 ,  G01S19/14 ,  G01S19/235 ,  G06F1/12 ,  H03L1/02 ,  H03L1/026

Abstract: Methods and systems for precise temperature and timebase ppm error estimation using multiple timebases may comprise measuring a temperature corresponding to the plurality of timebases. The frequencies of the timebases may be compared to generate error functions for the timebases, and generating a more accurate reading of the temperature based, at least in part, on the measured temperature and the error functions for the timebases. The timebases may be calibrated utilizing the generated more accurate reading. The plurality of timebases may comprise different order temperature dependencies. The models of temperature dependencies of each of the plurality of timebases may be updated based, at least in part, on the fine reading of the temperature corresponding to the plurality of timebases. A global navigation satellite system (GNSS) clock signal may be utilized periodically to improve the accuracy of the calibration of the plurality of timebases.

公开(公告)号：US10028239B2

公开(公告)日：2018-07-17

申请号：US15277375

申请日：2016-09-27

Applicant: Maxlinear, Inc.

Inventor： Curtis Ling ,  Xing Tan ,  Hyungjin Kim

IPC: G01S19/23 ,  H04W56/00 ,  H03L1/02 ,  G06F1/12 ,  G01S19/14

Abstract: Methods and systems for precise temperature and timebase ppm error estimation using multiple timebases may comprise measuring a temperature corresponding to the plurality of timebases. The frequencies of the timebases may be compared to generate error functions for the timebases, and generating a more accurate reading of the temperature based, at least in part, on the measured temperature and the error functions for the timebases. The timebases may be calibrated utilizing the generated more accurate reading. The plurality of timebases may comprise different order temperature dependencies. The models of temperature dependencies of each of the plurality of timebases may be updated based, at least in part, on the fine reading of the temperature corresponding to the plurality of timebases. A global navigation satellite system (GNSS) clock signal may be utilized periodically to improve the accuracy of the calibration of the plurality of timebases.

公开(公告)号：US20170019871A1

公开(公告)日：2017-01-19

申请号：US15277375

申请日：2016-09-27

Applicant: Maxlinear, Inc.

Inventor： Curtis Ling ,  Xing Tan ,  Hyungjin Kim

IPC: H04W56/00 ,  G01S19/14 ,  G06F1/12

CPC classification number: H04W56/001 ,  G01S19/14 ,  G01S19/235 ,  G06F1/12 ,  H03L1/02 ,  H03L1/026

Abstract: Methods and systems for precise temperature and timebase ppm error estimation using multiple timebases may comprise measuring a temperature corresponding to the plurality of timebases. The frequencies of the timebases may be compared to generate error functions for the timebases, and generating a more accurate reading of the temperature based, at least in part, on the measured temperature and the error functions for the timebases. The timebases may be calibrated utilizing the generated more accurate reading. The plurality of timebases may comprise different order temperature dependencies. The models of temperature dependencies of each of the plurality of timebases may be updated based, at least in part, on the fine reading of the temperature corresponding to the plurality of timebases. A global navigation satellite system (GNSS) clock signal may be utilized periodically to improve the accuracy of the calibration of the plurality of timebases.

Abstract translation: 使用多个时基的精确温度和时基ppm误差估计的方法和系统可以包括测量对应于多个时基的温度。 可以比较时基的频率以产生时间基的误差函数，并且至少部分地基于所测量的温度和时间基的误差函数来产生更准确的温度读数。 可以利用生成的更准确的读数来校准时基。 多个时基可以包括不同的顺序温度依赖性。 至少部分地，可以基于对应于多个时间基的温度的精细读取来更新多个时基中的每一个的温度依赖性的模型。 周期性地可以利用全球导航卫星系统（GNSS）时钟信号来提高多个时基的校准精度。

公开(公告)号：US09252780B2

公开(公告)日：2016-02-02

申请号：US13784761

申请日：2013-03-04

Applicant: MaxLinear, Inc.

Inventor： Anand K. Anandakumar ,  Hyungjin Kim ,  Curtis Ling

IPC: H03L1/02 ,  G01S19/23 ,  H03L7/197

CPC classification number: H03L1/026 ,  G01S19/235 ,  H03L1/022 ,  H03L7/1976

Abstract: To determine the level of frequency drift of a crystal oscillator as a result of a change in the its temperature, the temperature of the crystal oscillator is sensed and used together with previously stored data that includes a multitude of drift values of the frequency of the crystal oscillator each associated with a temperature of the crystal oscillator. Optionally, upon initialization of a GPS receiver in which the crystal oscillator is disposed, an initial temperature of the crystal oscillator is measured and a PLL is set to an initial frequency in association with the initial temperature. When acquisition fails in a region, the ppm region is changed. The temperature of the crystal oscillator is periodically measured and compared with the initial temperature, and the acquisition process is reset if there is a significant change in temperature. The GPS processor enters the tracking phase when acquisition is successful.

公开(公告)号：US20140049331A1

公开(公告)日：2014-02-20

申请号：US13784761

申请日：2013-03-04

Applicant: MaxLinear, Inc.

Inventor： Anand K. Anandakumar ,  Hyungjin Kim ,  Curtis Ling

IPC: H03L1/02

CPC classification number: H03L1/026 ,  G01S19/235 ,  H03L1/022 ,  H03L7/1976

Abstract: To determine the level of frequency drift of a crystal oscillator as a result of a change in the its temperature, the temperature of the crystal oscillator is sensed and used together with previously stored data that includes a multitude of drift values of the frequency of the crystal oscillator each associated with a temperature of the crystal oscillator. Optionally, upon initialization of a GPS receiver in which the crystal oscillator is disposed, an initial temperature of the crystal oscillator is measured and a PLL is set to an initial frequency in association with the initial temperature. When acquisition fails in a region, the ppm region is changed. The temperature of the crystal oscillator is periodically measured and compared with the initial temperature, and the acquisition process is reset if there is a significant change in temperature. The GPS processor enters the tracking phase when acquisition is successful.

Abstract translation: 为了确定晶体振荡器的温度变化导致的晶体振荡器的频率漂移，晶体振荡器的温度与先前存储的包含晶体频率漂移值的数据一起被检测并使用 每个振荡器都与晶体振荡器的温度相关联。 可选地，在其中设置晶体振荡器的GPS接收机初始化时，测量晶体振荡器的初始温度，并将PLL设置为与初始温度相关联的初始频率。 当区域中的采集失败时，ppm区域发生变化。 周期性地测量晶体振荡器的温度并将其与初始温度进行比较，如果温度有明显变化，则采集过程将被重置。 采集成功后，GPS处理器进入跟踪阶段。