公开(公告)号：US20140004887A1

公开(公告)日：2014-01-02

申请号：US13774342

申请日：2013-02-22

Applicant: QUALCOMM INCORPORATED

Inventor： Dominic Gerard FARMER ,  Vishal AGARWAL ,  Emilija Milorad SIMIC ,  Daniel Fred FILIPOVIC ,  Sasidhar MOWA

IPC: H03L1/02 ,  G01S19/23

CPC classification number: H04W56/00 ,  G01S19/235 ,  H03L1/022

Abstract: Systems and methods for temperature-calibration of an uncompensated XO in a mobile device during mobile device operation. The XO is temperature-calibrated based on assistance from wireless signals, such as from satellite source, and optionally from terrestrial sources such as WWAN, CDMA, etc. Based on one or more received wireless signals received at a receiver, corresponding frequency estimates of the XO are obtained and correlated with corresponding operating temperatures in a processor. Based on one or more samples of frequency estimates and associated temperatures, the XO is temperature-calibrated in the processor wherein a frequency-temperature (FT) model is formulated for the XO. The frequency of the temperature-calibrated XO can be determined from the FT model at any given temperature.

Abstract translation: 用于移动设备操作期间移动设备中未补偿的XO的温度校准的系统和方法。 基于来自无线信号（例如来自卫星源）和可选地从诸如WWAN，CDMA等地面源的无线信号进行温度校准。基于在接收机处接收到的一个或多个接收到的无线信号，相应的频率估计 获得XO并与处理器中的对应操作温度相关联。 基于频率估计和相关温度的一个或多个样本，XO在处理器中被温度校准，其中为XO制定了频率 - 温度（FT）模型。 温度校准XO的频率可以在任何给定温度下从FT模型确定。

公开(公告)号：US20180160381A1

公开(公告)日：2018-06-07

申请号：US15881685

申请日：2018-01-26

Applicant: QUALCOMM Incorporated

Inventor： Jie WU ,  Daniel Fred FILIPOVIC ,  Emilija Milorad SIMIC ,  Vishal AGARWAL

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

CPC classification number: H04W56/00 ,  G01S19/235 ,  H03L1/022

Abstract: System and method for temperature-calibration of a crystal oscillator (XO) in a mobile device. A temperature-calibration status of the XO is determined and a trigger condition related to temperature-calibration of the XO is detected. If the temperature-calibration status of the XO is not fully temperature-calibrated or if the XO has not been previously temperature-calibrated, a temperature-calibration session is initiated by an XO manager based on the condition, wherein a receiver is configured to receive signals and temperature-calibration of the XO is performed in a background mode based on the received signals. The condition based triggering ensures that the XO is temperature-calibrated prior to launch of any position based or global navigation satellite systems (GNSS) based applications on the mobile device. The trigger condition can include first use or power-on, charging, presence in an outdoor environment, variation in operating temperature, pre-specified time, and/or user input pertaining to the mobile device.

公开(公告)号：US20170272108A1

公开(公告)日：2017-09-21

申请号：US15460508

申请日：2017-03-16

Applicant: QUALCOMM Incorporated

Inventor： Daniel Fred FILIPOVIC ,  Adrianus VAN BEZOOIJEN ,  David Loweth WINSLOW ,  Jorge FABREGA SANCHEZ

IPC: H04B1/04 ,  H04B7/06

CPC classification number: H04B1/0458 ,  H04B1/18 ,  H04B7/0619 ,  H04B17/102 ,  H04B17/309 ,  H04L5/001

Abstract: Certain aspects of the present disclosure provide methods and apparatus for adaptive antenna tuning. One example method for wireless communications generally includes determining a first channel characteristic associated with a first component carrier and an antenna in an apparatus; determining a second channel characteristic associated with a second component carrier and the antenna; and controlling a tuner coupled to the antenna based on at least one of the first channel characteristic or the second channel characteristic. For certain aspects, the tuner is controlled according to predetermined characteristics of the tuner, where the predetermined characteristics of the tuner are independent from predetermined characteristics of the antenna.

公开(公告)号：US20130310109A1

公开(公告)日：2013-11-21

申请号：US13838674

申请日：2013-03-15

Applicant: QUALCOMM INCORPORATED

Inventor： Daniel Fred FILIPOVIC ,  Hongbo Yan ,  Ning He

IPC: H04W88/06

CPC classification number: H01Q3/24 ,  H04B1/44 ,  H04B7/0404 ,  H04B7/0602 ,  H04B7/0608 ,  H04B7/0802 ,  H04B7/0814 ,  H04W24/02 ,  H04W36/14 ,  H04W36/30 ,  H04W72/085 ,  H04W76/18 ,  H04W88/06

Abstract: This disclosure provides systems, methods, and apparatus for antenna switching. In one embodiment, a wireless communication apparatus is provided. The wireless communication apparatus includes a plurality of antennas including a first antenna and a second antenna. The wireless communication apparatus further includes at least one receive circuit including a first receive circuit. The wireless communication apparatus further includes a controller configured to selectively switch the first receive circuit from receiving wireless communications via the first antenna to receive wireless communications via the second antenna if one or more performance characteristics of the first antenna are below a threshold in one or more measurement cycles, the one or more measurement cycles including a wake-up cycle outside of a predetermined wake-up cycle. Other aspects, embodiments, and features are also claimed and described.

Abstract translation: 本公开提供了用于天线切换的系统，方法和装置。 在一个实施例中，提供了一种无线通信装置。 无线通信装置包括包括第一天线和第二天线的多个天线。 无线通信装置还包括至少一个包括第一接收电路的接收电路。 所述无线通信装置还包括控制器，所述控制器被配置为：如果所述第一天线的一个或多个性能特征低于阈值，则所述第一天线的第一接收电路经由所述第一天线选择性地接收无线通信，以经由所述第二天线接收无线通信 测量周期，所述一个或多个测量周期包括在预定的唤醒周期之外的唤醒周期。 还要求和描述其它方面，实施例和特征。

公开(公告)号：US20130308561A1

公开(公告)日：2013-11-21

申请号：US13834777

申请日：2013-03-15

Applicant: QUALCOMM INCORPORATED

Inventor： Ning HE ,  Daniel Fred FILIPOVIC ,  Ramesh C. CHIRALA

IPC: H04W76/02

CPC classification number: H01Q3/24 ,  H04B1/44 ,  H04B7/0404 ,  H04B7/0602 ,  H04B7/0608 ,  H04B7/0802 ,  H04B7/0814 ,  H04W24/02 ,  H04W36/14 ,  H04W36/30 ,  H04W72/085 ,  H04W76/18 ,  H04W88/06

Abstract: This disclosure provides systems, methods, and apparatus for an initial network acquisition process via multiple antennas. In one aspect a method of establishing communications via a wireless network at a wireless communications apparatus is provided. The method includes attempting an initial acquisition process, over one or more frequencies, for establishing communications over the wireless network via a transmit circuit and a receive circuit transmitting and receiving via a first antenna. The method further includes switching the transmit circuit and the receive circuit from transmitting and receiving via the first antenna to a second antenna in response to detecting failure of the initial acquisition process. The switching is independent of a performance metric of the first or the second antenna. The method further includes re-attempting the initial acquisition process based on the switching to the second antenna over the one or more frequencies.

Abstract translation: 本公开提供了用于经由多个天线的初始网络获取过程的系统，方法和装置。 在一个方面，提供了一种在无线通信装置处经由无线网络建立通信的方法。 该方法包括尝试通过一个或多个频率的初始采集过程，以经由发射电路和经由第一天线发送和接收的接收电路在无线网络上建立通信。 该方法还包括响应于检测到初始采集过程的故障，将发射电路和接收电路经由第一天线发射和接收切换到第二天线。 开关与第一或第二天线的性能指标无关。 该方法还包括基于通过一个或多个频率切换到第二天线来重新尝试初始获取过程。