公开(公告)号：US10082579B2

公开(公告)日：2018-09-25

申请号：US15099406

申请日：2016-04-14

Applicant: QUALCOMM Incorporated

Inventor： Suresh Kumar Bitra ,  Mahadevan Srinivasan ,  Vivek Sankaravadivel

IPC: G01S19/05 ,  G01S19/25 ,  G01S19/07 ,  H04W84/04 ,  H04W4/80

CPC classification number: G01S19/07 ,  G01S19/05 ,  G01S19/23 ,  G01S19/256 ,  H04W4/80 ,  H04W56/0025 ,  H04W56/004 ,  H04W84/04

Abstract: In some embodiments, Satellite Positioning System (SPS) time information associated with at least one SPS may be maintained at a UE, which may also receive time information from a Wireless Wide Area Network (WWAN). In some embodiments, the UE may determine a corrected SPS time information for a first time based, in part, on the received WWAN time information, where the corrected SPS time information corrects the SPS time information associated with the at least one SPS maintained at the UE. The UE may initiate transmission of SPS timing assistance information to an associated device over a Wireless Personal Area Network (WPAN), wherein the SPS timing assistance information comprises the corrected SPS time information for the first time.

公开(公告)号：US20160049945A1

公开(公告)日：2016-02-18

申请号：US14827192

申请日：2015-08-14

Applicant: QUALCOMM Incorporated

Inventor： Vishal AGARWAL ,  Mahadevan Srinivasan

IPC: H03L1/02

CPC classification number: H03L1/028 ,  H03B5/04 ,  H03L1/02

Abstract: In some examples, compensating for hysteretic characteristics of a crystal oscillator in a timing circuit includes obtaining a plurality of successive temperature measurements. From the plurality of successive temperature measurements, a temperature gradient having a sign and a magnitude can be determined. A frequency compensation parameter can then be determined based on any combination of two or more factors chosen from a set of factors including a temperature measurement, the sign of the temperature gradient, and the magnitude of the temperature gradient. A frequency error of the timing circuit can then be compensated based on the frequency compensation parameter.

Abstract translation: 在一些示例中，补偿定时电路中的晶体振荡器的滞后特性包括获得多个连续的温度测量。 从多个连续的温度测量可以确定具有符号和幅度的温度梯度。 然后可以基于从包括温度测量，温度梯度的符号和温度梯度的幅度的一组因素中选择的两个或多个因子的任何组合来确定频率补偿参数。 然后可以基于频率补偿参数补偿定时电路的频率误差。

公开(公告)号：US20170299725A1

公开(公告)日：2017-10-19

申请号：US15099406

申请日：2016-04-14

Applicant: QUALCOMM Incorporated

Inventor： Suresh Kumar Bitra ,  Mahadevan Srinivasan ,  Vivek Sankaravadivel

IPC: G01S19/07 ,  G01S19/05 ,  H04W84/04 ,  H04W4/00

CPC classification number: G01S19/07 ,  G01S19/05 ,  G01S19/13 ,  H04W4/80 ,  H04W56/0025 ,  H04W56/004 ,  H04W84/04

Abstract: In some embodiments, Satellite Positioning System (SPS) time information associated with at least one SPS may be maintained at a UE, which may also receive time information from a Wireless Wide Area Network (WWAN). In some embodiments, the UE may determine a corrected SPS time information for a first time based, in part, on the received WWAN time information, where the corrected SPS time information corrects the SPS time information associated with the at least one SPS maintained at the UE. The UE may initiate transmission of SPS timing assistance information to an associated device over a Wireless Personal Area Network (WPAN), wherein the SPS timing assistance information comprises the corrected SPS time information for the first time.

公开(公告)号：US09548744B2

公开(公告)日：2017-01-17

申请号：US14827192

申请日：2015-08-14

Applicant: QUALCOMM Incorporated

Inventor： Vishal Agarwal ,  Mahadevan Srinivasan

IPC: H03L1/02 ,  H03B5/04

CPC classification number: H03L1/028 ,  H03B5/04 ,  H03L1/02

Abstract: In some examples, compensating for hysteretic characteristics of a crystal oscillator in a timing circuit includes obtaining a plurality of successive temperature measurements. From the plurality of successive temperature measurements, a temperature gradient having a sign and a magnitude can be determined. A frequency compensation parameter can then be determined based on any combination of two or more factors chosen from a set of factors including a temperature measurement, the sign of the temperature gradient, and the magnitude of the temperature gradient. A frequency error of the timing circuit can then be compensated based on the frequency compensation parameter.

Abstract translation: 在一些示例中，补偿定时电路中的晶体振荡器的滞后特性包括获得多个连续的温度测量。 从多个连续的温度测量可以确定具有符号和幅度的温度梯度。 然后可以基于从包括温度测量，温度梯度的符号和温度梯度的幅度的一组因素中选择的两个或多个因子的任何组合来确定频率补偿参数。 然后可以基于频率补偿参数补偿定时电路的频率误差。