公开(公告)号：US09900856B2

公开(公告)日：2018-02-20

申请号：US14862822

申请日：2015-09-23

Applicant: QUALCOMM Incorporated

Inventor： Qiang Wu ,  Peter John Black

IPC: H04W76/00 ,  H04W56/00 ,  H04B7/185 ,  H04B7/01

CPC classification number: H04W56/0015 ,  H04B7/01 ,  H04B7/18502 ,  H04B7/18513 ,  H04W56/0035 ,  H04W56/0045

Abstract: Method and apparatus for time or frequency synchronization of radio signals transmitted by user terminals in communication with a gateway through a satellite is provided. The satellite may be part of a non-synchronous satellite communication system, such as a low-earth orbit (LEO) satellite communication system for data, voice or video communications. Times of transmission of return link radio signals from the user terminals may be adjusted such that the signals arrive at the satellite or at the gateway without large time delay differentials. Carrier frequencies of return link radio signals transmitted from the user terminals may be adjusted such that the signals arrive at the satellite or at the gateway without large frequency offset differentials.

公开(公告)号：US09538538B2

公开(公告)日：2017-01-03

申请号：US14864758

申请日：2015-09-24

Applicant: QUALCOMM Incorporated

Inventor： Dan Zhang ,  Mehmet Izzet Gurelli ,  Sumeeth Nagaraja ,  Dan Vassilovski ,  James Taylor Determan ,  Gene Wesley Marsh ,  Qiang Wu

IPC: H04B7/185 ,  H04W72/04

CPC classification number: H04W72/046 ,  H04B7/18543 ,  H04W72/0473

Abstract: A method and apparatus for a non-geosynchronous orbit (NGSO) satellite to comply with equivalent power flux density (EPFD) limits are disclosed. The example implementations may allow a constellation of NGSO satellites to comply with EPFD limits without disabling beams transmitted from the NGSO satellites. The power level of one or more beams to be transmitted from the NGSO satellites may be dynamically adjusted according to a beam power back-off schedule. In some aspects, the beam power back-off schedule may specify beam power back-off values as a function of latitude on Earth, and may allow for maximum allowable power levels for beams transmitted from the NGSO satellites without violating any of the EPFD percentile limits.

Abstract translation: 公开了一种用于非地球同步轨道（NGSO）卫星符合等效功率通量密度（EPFD）限值的方法和装置。 示例实现可以允许NGSO卫星的星座符合EPFD限制，而不禁止从NGSO卫星发射的波束。 从NGSO卫星发送的一个或多个波束的功率电平可以根据波束功率退避进度进行动态调整。 在一些方面，波束功率回退计划可以指定作为地球上纬度的函数的波束功率回退值，并且可以允许从NGSO卫星发射的波束的最大允许功率电平，而不违反任何EPFD百分位数限制 。

公开(公告)号：US09525477B1

公开(公告)日：2016-12-20

申请号：US14864831

申请日：2015-09-24

Applicant: QUALCOMM Incorporated

Inventor： Qiang Wu ,  Peter John Black ,  Jun Ma

IPC: G06F15/16 ,  H04B7/185 ,  H04L12/26 ,  H04L5/00

CPC classification number: H04B7/18513 ,  H04L27/0014 ,  H04L43/16

Abstract: A method and apparatus for estimating a frequency offset of received signals. The receiving device receives a plurality of pilot signals form a transmitting device, and determines an un-aliased frequency offset estimate based on the received pilot signals. The receiving device further determines a low-noise frequency offset estimate based on the received pilot signals, wherein the low-noise frequency offset estimate is blow a threshold noise level. The receiving device then generates a hybrid frequency offset estimate based at least in part on the un-aliased and low-noise frequency offset estimates, wherein the hybrid frequency offset estimate is un-aliased and has a lower estimation noise than the un-aliased frequency offset estimate.

Abstract translation: 一种用于估计接收信号的频率偏移的方法和装置。 接收设备从发送设备接收多个导频信号，并且基于接收到的导频信号来确定非混叠频偏估计。 接收装置还基于接收到的导频信号进一步确定低噪声频率偏移估计，其中，低噪声频率偏移估计值会产生阈值噪声水平。 然后，所述接收装置至少部分地基于所述未混叠和低噪声频率偏移估计来产生混合频率偏移估计，其中所述混合频率偏移估计是未锯齿的并且具有比所述非混叠频率更低的估计噪声 抵消估计。

公开(公告)号：US20160278064A1

公开(公告)日：2016-09-22

申请号：US14864791

申请日：2015-09-24

Applicant: QUALCOMM Incorporated

Inventor： Gene Wesley Marsh ,  Qiang Wu ,  Peter John Black ,  Dan Vassilovski ,  Mehmet lzzet GurelIi

IPC: H04W72/04 ,  H04W52/24

CPC classification number: H04W72/046 ,  H04B7/185 ,  H04B7/18513 ,  H04B7/18539 ,  H04B7/2041 ,  H04W52/243

Abstract: A method and apparatus for operating one or more satellites in a non-geosynchronous orbit (NGSO) satellite constellation are disclosed. In some aspects, a coverage area on Earth for a first beam transmitted from a first satellite in the NGSO satellite constellation may be determined, a cone may be projected onto a first region of the beam coverage area, a second region of the beam coverage area may be defined as including portions of the beam coverage area lying outside the first region, and a minimum arc angle for each of a plurality of points within the first region but not the second region of the beam coverage area may be determined.

Abstract translation: 公开了一种在非地球同步轨道（NGSO）卫星星座中操作一个或多个卫星的方法和装置。 在一些方面中，可以确定从NGSO卫星星座中的第一卫星发送的用于第一波束的地球上的覆盖区域，锥体可投影到波束覆盖区域的第一区域，波束覆盖区域的第二区域 可以被定义为包括位于第一区域之外的波束覆盖区域的部分，并且可以确定波束覆盖区域的第一区域内但不是波束覆盖区域的第二区域中的多个点中的每一个点的最小弧角。

公开(公告)号：US20160278063A1

公开(公告)日：2016-09-22

申请号：US14864758

申请日：2015-09-24

Applicant: QUALCOMM Incorporated

Inventor： Dan Zhang ,  Mehmet Izzet Gurelli ,  Sumeeth Nagaraja ,  Dan Vassilovski ,  James Taylor Determan ,  Gene Wesley Marsh ,  Qiang Wu

IPC: H04W72/04

CPC classification number: H04W72/046 ,  H04B7/18543 ,  H04W72/0473

Abstract: A method and apparatus for a non-geosynchronous orbit (NGSO) satellite to comply with equivalent power flux density (EPFD) limits are disclosed. The example implementations may allow a constellation of NGSO satellites to comply with EPFD limits without disabling beams transmitted from the NGSO satellites. The power level of one or more beams to be transmitted from the NGSO satellites may be dynamically adjusted according to a beam power back-off schedule. In some aspects, the beam power back-off schedule may specify beam power back-off values as a function of latitude on Earth, and may allow for maximum allowable power levels for beams transmitted from the NGSO satellites without violating any of the EPFD percentile limits.

Abstract translation: 公开了一种用于非地球同步轨道（NGSO）卫星符合等效功率通量密度（EPFD）限值的方法和装置。 示例实现可以允许NGSO卫星的星座符合EPFD限制，而不禁止从NGSO卫星发射的波束。 从NGSO卫星发送的一个或多个波束的功率电平可以根据波束功率退避进度进行动态调整。 在一些方面，波束功率回退计划可以指定作为地球上纬度的函数的波束功率回退值，并且可以允许从NGSO卫星发射的波束的最大允许功率电平，而不违反任何EPFD百分位数限制 。

公开(公告)号：US20160277095A1

公开(公告)日：2016-09-22

申请号：US14864722

申请日：2015-09-24

Applicant: QUALCOMM Incorporated

Inventor： Gene Wesley Marsh ,  Qiang Wu ,  Peter John Black ,  Dan Vassilovski

IPC: H04B7/185

CPC classification number: H04W72/046 ,  H04B7/185 ,  H04B7/18513 ,  H04B7/18539 ,  H04B7/2041 ,  H04W52/243

Abstract: A method and apparatus for operating one or more satellites in a non-geosynchronous orbit (NGSO) satellite constellation are disclosed. In some aspects, the satellite may allocate a first frequency band to a first beam, and may allocate a second frequency band to a second beam. Then, if the first beam is disabled, the satellite may re-map the first frequency band from the first beam to the second beam. In this manner, frequency resources initially allocated to a disabled beam may be re-mapping to another, non-disabled beam.

Abstract translation: 公开了一种在非地球同步轨道（NGSO）卫星星座中操作一个或多个卫星的方法和装置。 在一些方面，卫星可以将第一频带分配给第一波束，并且可以向第二波束分配第二频带。 然后，如果第一波束被禁用，卫星可以将第一频带从第一波束重新映射到第二波束。 以这种方式，最初分配给禁用波束的频率资源可以重新映射到另一个非禁用波束。

公开(公告)号：US20140038645A1

公开(公告)日：2014-02-06

申请号：US13951080

申请日：2013-07-25

Applicant: QUALCOMM Incorporated

Inventor： Qiang Wu ,  Wanlun Zhao ,  Peter John Black

IPC: H04W4/02

CPC classification number: G01S19/24 ,  H03M1/185 ,  H04L5/0023 ,  H04L5/0048 ,  H04L27/261 ,  H04L27/2613 ,  H04W16/02 ,  H04W64/00

Abstract: Briefly, in accordance with one embodiment, a method of adjusting for digital automatic gain control (DAGC) quantization error in a mobile station is as follows. A first DAGC value is stored before reception of one or more enhanced pilot signals. A second DAGC value is computed during reception of the one or more enhanced pilot signal. The first DAGC value is restored after reception of the one or more enhanced pilot signals is over. An advantage associated with this particular embodiment may include reduction in quantization error for digital automatic gain control.

公开(公告)号：US20140029705A1

公开(公告)日：2014-01-30

申请号：US13944495

申请日：2013-07-17

Applicant: QUALCOMM Incorporated

Inventor： Qiang Wu ,  Wanlun Zhao ,  Peter John Black

IPC: H04L27/26

CPC classification number: G01S19/24 ,  H03M1/185 ,  H04L5/0023 ,  H04L5/0048 ,  H04L27/261 ,  H04L27/2613 ,  H04W16/02 ,  H04W64/00

Abstract: Briefly, in accordance with one embodiment, a method of adjusting for digital automatic gain control (DAGC) quantization error in a mobile station is as follows. A first DAGC value is stored before reception of one or more enhanced pilot signals. A second DAGC value is computed during reception of the one or more enhanced pilot signal. The first DAGC value is restored after reception of the one or more enhanced pilot signals is over. An advantage associated with this particular embodiment may include reduction in quantization error for digital automatic gain control.

Abstract translation: 简而言之，根据一个实施例，移动台中的数字自动增益控制（DAGC）量化误差的调整方法如下。 在接收到一个或多个增强导频信号之前存储第一DAGC值。 在接收一个或多个增强导频信号期间计算第二DAGC值。 在接收到一个或多个增强导频信号结束之后恢复第一个DAGC值。 与该特定实施例相关联的优点可以包括减少用于数字自动增益控制的量化误差。