公开(公告)号：US10237103B2

公开(公告)日：2019-03-19

申请号：US15078087

申请日：2016-03-23

Applicant: QUALCOMM Incorporated

Inventor： Alexandros Manolakos ,  Tingfang Ji ,  June Namgoong ,  Joseph Binamira Soriaga

IPC: H04L27/26 ,  H04L5/00 ,  H04B7/06 ,  H04B7/0456

Abstract: Aspects provide for selecting a precoder mode for a transmission, changing a cyclic prefix (CP) length based on the selected precoder mode, and transmitting a signal that includes the changed CP length. Changing the CP length may involve using the selected precoder mode to lookup a value by which to change a nominal CP length. After changing the CP length, information indicating the changed CP length may be transmitted to a receiver of the signal. Precoder mode selection may be based on feedback information that indicates whether a receiver requests a change to the CP length. Precoder mode selection may be based on a received reference signal that indicates a condition of a communication channel. The reference signal may be used to select the precoder mode that results in the smallest relative delay spread, the largest relative delay spread compression, the largest relative beamforming gain, and/or the largest relative throughout.

公开(公告)号：US10200994B2

公开(公告)日：2019-02-05

申请号：US15591374

申请日：2017-05-10

Applicant: QUALCOMM Incorporated

Inventor： Seyong Park ,  Jing Jiang ,  Hao Xu ,  Lu Zhao ,  Alexandros Manolakos ,  June Namgoong ,  Wei Zeng ,  Huang Lou

IPC: H04W72/04 ,  H04L5/00 ,  H04L27/26 ,  H04L25/03 ,  H04W16/14

Abstract: Aspects of the present disclosure describe a guard band signal for communication on a guard band between a first frequency band utilized by a first radio access technology having a first sub-carrier spacing and a second frequency band utilized by a second radio access technology having a second sub-carrier spacing that is a multiple of the first sub-carrier spacing. The guard band signal includes a symbol that is repeated a number of times equal to the multiple. The guard band signal may be generated and transmitted by a transmitting device. The guard band signal may be received and decoded by a receiving device. The guard band signal is interpretable according to a first numerology of the first radio access technology and according to a second numerology of the second radio access technology.

公开(公告)号：US20180184410A1

公开(公告)日：2018-06-28

申请号：US15694143

申请日：2017-09-01

Applicant: QUALCOMM Incorporated

Inventor： Makesh Pravin John Wilson ,  Tao Luo ,  Yang Yang ,  Heechoon Lee ,  Bilal Sadiq ,  June Namgoong

IPC: H04W72/04 ,  H04L5/00

Abstract: User equipment (UE)-specific information may be transmitted within a control resource set configured to carry resources common to UEs within a system. The UE-specific information may be associated with a search space having an aggregation level different from aggregation levels used with the common control resources and may occupy different modulation symbols within the common control resource set (e.g., to support flexible scheduling for multiple UEs). A base station and UE may operate in a system using one or more control resource sets within a system bandwidth. The UE may detect common control resources by monitoring decoding candidates in the control resource set according to a first set of aggregation levels. The UE may detect UE-specific control resources by monitoring decoding candidates in the control resource set according to other aggregation levels. The UE and base station may communicate based on control information obtained from the monitoring.

公开(公告)号：US20180092002A1

公开(公告)日：2018-03-29

申请号：US15466663

申请日：2017-03-22

Applicant: QUALCOMM Incorporated

Inventor： Alexandros Manolakos ,  June Namgoong ,  Yang Yang ,  Jing Jiang

IPC: H04W28/20 ,  H04W72/08 ,  H04W72/04 ,  H04W72/12 ,  H04L5/00

Abstract: A method at a scheduling entity might include determining that interference is present from a neighboring scheduling entity, which implements a second subcarrier spacing that is different from a first subcarrier spacing of the scheduling entity. The scheduling entity might request the neighboring scheduling entity to negotiate a bandwidth group (BWG), where the BWG is a bandwidth occupied by downlink subcarriers within which a transmission parameter is maintained. The method might include negotiating a bandwidth of the bandwidth group and transmitting, if negotiating is successful, downlink data to a scheduled entity served by the scheduling entity according to the negotiated bandwidth. The transmission parameter might be a precoder, rank, modulation order, power inside each BWG, or numerology. The numerology might be scalable and might be a combination of subcarrier spacing and cyclic prefix (CP) overhead, The subcarrier spacing might be scaled while keeping constant the CP overhead as a percentage of a symbol duration.

公开(公告)号：US09615344B2

公开(公告)日：2017-04-04

申请号：US14265123

申请日：2014-04-29

Applicant: QUALCOMM Incorporated

Inventor： Ruoheng Liu ,  June Namgoong ,  Hai Le ,  Srikant Jayaraman ,  Sunil Kamavaram ,  Rajakumar Ebenezar Devairakkam ,  Venkatraman Rajagopalan

IPC: H04W56/00 ,  H04W74/08 ,  H04B7/185 ,  H04W74/00

CPC classification number: H04W56/004 ,  H04B7/18506 ,  H04W74/002 ,  H04W74/004 ,  H04W74/0833

Abstract: Methods, systems, and devices are described for establishing a wireless communications link at an aircraft terminal (AT). An AT may determine a timing offset based on the propagation delay between the AT and a ground station, which in some cases may be more than 100 kilometers away. The AT may then transmit an initial access message to the ground station based on the determined timing offset. In some embodiments, the AT may receive an access response message from the ground station that includes a timing alignment value and adjust the timing offset based on this value. The AT may transmit a connection message to the ground station that includes AT location information. This information may be used by the ground station to facilitate beamforming.

公开(公告)号：US20150181544A1

公开(公告)日：2015-06-25

申请号：US14265123

申请日：2014-04-29

Applicant: QUALCOMM Incorporated

Inventor： Ruoheng Liu ,  June Namgoong ,  Hai Le ,  Srikant Jayaraman ,  Sunil Kamavaram ,  Rajakumar Ebenezar Devairakkam ,  Venkatraman Rajagopalan

IPC: H04W56/00 ,  H04W74/08

CPC classification number: H04W56/004 ,  H04B7/18506 ,  H04W74/002 ,  H04W74/004 ,  H04W74/0833

Abstract: Methods, systems, and devices are described for establishing a wireless communications link at an aircraft terminal (AT). An AT may determine a timing offset based on the propagation delay between the AT and a ground station, which in some cases may be more than 100 kilometers away. The AT may then transmit an initial access message to the ground station based on the determined timing offset. In some embodiments, the AT may receive an access response message from the ground station that includes a timing alignment value and adjust the timing offset based on this value. The AT may transmit a connection message to the ground station that includes AT location information. This information may be used by the ground station to facilitate beamforming.

Abstract translation: 描述了用于在飞行器终端（AT）建立无线通信链路的方法，系统和设备。 AT可以基于AT和地面站之间的传播延迟来确定定时偏移，在某些情况下，这可能超过100公里。 然后，AT可以基于所确定的定时偏移将初始接入消息发送到地面站。 在一些实施例中，AT可以从地面站接收包括定时对准值的访问响应消息，并且基于该值调整定时偏移。 AT可以向包括AT位置信息的地面站发送连接消息。 该信息可以由地面站使用以促进波束成形。

公开(公告)号：US20150163683A1

公开(公告)日：2015-06-11

申请号：US14101919

申请日：2013-12-10

Applicant: QUALCOMM Incorporated

Inventor： June Namgoong ,  Srikant Jayaraman ,  Ruoheng Liu

IPC: H04W16/28 ,  H04B7/06 ,  H04W88/08

CPC classification number: H04W16/28 ,  H04B7/06 ,  H04B7/0617 ,  H04B7/068 ,  H04B7/0691 ,  H04B7/0695 ,  H04W88/08

Abstract: Methods, systems, and devices are described for transmitting across a broad azimuth using an antenna array. In one example, a method is described that includes forming two subarrays from an antenna array. Beamforming weights are selected for each subarray to cause the radiation patterns to be complementary over a range of the azimuth of a cell. The beamforming weights may be selected according to a recursive relation based on the number of antenna elements in each subarray. Information may be encoded, scrambled, and mapped to modulation symbols. A Space Frequency Block Code (SFBC) such as an Alamouti Code may then be used to form two signals to be transmitted over the two subarrays.

Abstract translation: 描述了使用天线阵列在宽方位角上传输方法，系统和设备。 在一个示例中，描述了包括从天线阵列形成两个子阵列的方法。 为每个子阵列选择波束形成权重，以使辐射图在单元的方位角的范围内互补。 可以根据每个子阵列中的天线元素的数量根据递归关系来选择波束成形权重。 信息可以被编码，加扰和映射到调制符号。 然后，可以使用诸如Alamouti码之类的空间频率块码（SFBC）来形成要通过两个子阵列传输的两个信号。