公开(公告)号：US09008222B2

公开(公告)日：2015-04-14

申请号：US13964898

申请日：2013-08-12

Applicant: Samsung Electronics Co., Ltd

Inventor： Richard Stirling-Gallacher ,  Kaushik Morapakkam Josiam ,  Sridhar Rajagopal ,  Young-Han Nam

IPC: H04B7/06 ,  H04B7/04

CPC classification number: H04B7/0486 ,  H04B7/0452 ,  H04B7/0469 ,  H04B7/0617 ,  H04B7/0665

Abstract: A station in a wireless communication system includes a processor circuitry configured to form at least a first plurality of data streams and a second plurality of data streams, and a digital precoder configured to receive the first plurality of data streams and the second plurality of data streams. The wireless station can further include a plurality of radio frequency (RF) beamforming chains connected to the digital precoder and configured to form at least one RF envelope, wherein the digital precoder is configured to steer a plurality of digital beams within the at least one RF beam envelope, the digital beams forming a plurality of spatially distinct paths for the first plurality of data streams and a plurality of spatially distinct paths for the second plurality of data streams, and a plurality of antennas operably connected to the RF beamforming chains.

Abstract translation: 无线通信系统中的站包括配置成形成至少第一多个数据流和第二多个数据流的处理器电路，以及被配置为接收第一多个数据流和第二多个数据流的数字预编码器 。 无线站可以进一步包括连接到数字预编码器并被配置成形成至少一个RF包络的多个射频（RF）波束形成链，其中数字预编码器被配置为引导至少一个RF内的多个数字波束 波束包络，形成用于第一多个数据流的多个空间不同的路径的数字波束和用于第二多个数据流的多个空间不同的路径，以及可操作地连接到RF波束形成链的多个天线。

公开(公告)号：US20140084688A1

公开(公告)日：2014-03-27

申请号：US14028254

申请日：2013-09-16

Applicant: Samsung Electronics Co. LTD

Inventor： Ioannis Tzanidis ,  Umar Azad ,  Sridhar Rajagopal

IPC: H01F38/14

CPC classification number: H02J50/12 ,  H01F38/14 ,  H02J7/025 ,  H02J17/00 ,  H02J50/10 ,  H02J50/40 ,  H02J50/50 ,  H02J50/80 ,  Y10T307/492

Abstract: A method for wireless power transmission includes establishing respective wireless communication link between a coordinating transmitter and each receiver. The method further includes measuring respective mutual impedance between a coordinating transmitter and each receiver by applying a voltage to the coordinating transmitter and configuring each receiver to measure an induced current in response to the applied voltage. The method calculates respective matching impedance for the coordinating transmitter and each receiver based on corresponding mutual impedance. The method transmits the respective matching impedance to each receiver to enable each receiver to adjust to have the respective matching impedance. The method adjusts the coordinating transmitter to have the respective matching impedance.

Abstract translation: 一种用于无线电力传输的方法包括在协调发射机和每个接收机之间建立相应的无线通信链路。 该方法还包括通过向协调发射机施加电压并且配置每个接收机以响应于所施加的电压来测量感应电流来测量协调发射机和每个接收机之间的相互的互阻抗。 该方法基于相应的互阻抗计算协调发射机和每个接收机的相应匹配阻抗。 该方法将相应的匹配阻抗发送到每个接收机，以使每个接收机能够调整为具有相应的匹配阻抗。 该方法调整协调发射机以具有相应的匹配阻抗。

公开(公告)号：US11689905B2

公开(公告)日：2023-06-27

申请号：US16708121

申请日：2019-12-09

Applicant: Samsung Electronics Co., Ltd.

Inventor： Sridhar Rajagopal ,  Aris Papasakellariou ,  Thomas David Novlan

IPC: H04W4/70 ,  H04L67/12 ,  H04L5/00 ,  H04W72/23 ,  H04L5/16 ,  H04W4/40 ,  H04W4/80

CPC classification number: H04W4/70 ,  H04L5/0007 ,  H04L5/0033 ,  H04L5/0053 ,  H04L5/0082 ,  H04L5/0087 ,  H04L5/0096 ,  H04L67/12 ,  H04W72/23 ,  H04L5/0044 ,  H04L5/0064 ,  H04L5/0069 ,  H04L5/16 ,  H04W4/40 ,  H04W4/80

Abstract: A user equipment (UE) and base station (BS) in a wireless communication network. The UE includes a receiver configured to receive at least one semi-persistent scheduling (SPS) configuration among a plurality of SPS configurations from a BS. Each of the SPS configurations configures the UE with a different periodicity of a sidelink transmission to be transmitted to another UE. The UE also includes a transmitter configured to transmit the sidelink transmission in the different periodicity according to the at least one of the plurality of SPS configurations. The BS includes a controller configured to select at least one SPS configuration among a plurality of SPS configurations for a UE. Each of the SPS configurations configures the UE with a different periodicity of a sidelink transmission to be transmitted to another UE. The BS also includes a transmitter configured to transmit the selected at least one SPS configuration to the UE.

公开(公告)号：US10383147B2

公开(公告)日：2019-08-13

申请号：US15382433

申请日：2016-12-16

Applicant: Samsung Electronics Co., Ltd

Inventor： Sridhar Rajagopal ,  Thomas David Novlan ,  Aris Papasakellariou

IPC: H04W74/08 ,  H04W28/02 ,  H04W84/18 ,  H04W76/14 ,  H04W72/12

Abstract: The sensing method a first vehicle user equipment (UE) for collision avoidance in a wireless communication network comprises receiving a set of scheduling assignment (SA) information allocated to a set of second vehicle UEs, decoding the set of SA information, each of which includes SA information to each of the set of second vehicle UEs, performing energy sensing operation for resources to be used by each of the set of second vehicle UEs to determine additional potential SA transmission and data transmission from the set of second vehicle UEs over the resources, determining available resources for the data transmission from the first vehicle UE based on the performed energy sensing and SA sensing, skipping a channel sensing operation on at least one subframe that is used for the data transmission from the first vehicle UE, and transmitting data among resources identified as unused in next transmissions from second vehicle UEs.

公开(公告)号：US10194388B2

公开(公告)日：2019-01-29

申请号：US14579740

申请日：2014-12-22

Applicant: Samsung Electronics Co., Ltd.

Inventor： Sridhar Rajagopal ,  Shadi Abu-Surra ,  Eran Pisek

IPC: H04W52/02 ,  H04W56/00 ,  H04W28/20 ,  H04W84/12

Abstract: In a packet-based communication system, a transmitter and a receiver implement low power synchronization techniques. The transmitter transmits a packet that includes a two-part preamble. A first part of the two-part preamble is transmitted at a first reduced bandwidth that is smaller than a second bandwidth of the channel, and at least one of a second part of the two-part preamble and another portion of the packet is transmitted at the second bandwidth of the channel. The receiver includes an interleaved analog-to-digital converter (ADC) including multiple sub-ADCs. The receiver turns on a first subset of the multiple sub-ADCs during an idle listening period, and turns on a second subset of the multiple sub-ADCs upon detection of a completion of the first part of the two-part preamble, wherein the first subset of the multiple sub-ADCs is less than the second subset of the multiple sub-ADCs.

公开(公告)号：US10050816B2

公开(公告)日：2018-08-14

申请号：US14675190

申请日：2015-03-31

Applicant: Samsung Electronics Co., Ltd.

Inventor： Sridhar Rajagopal ,  Shadi Abu-Surra

IPC: H04L27/26 ,  H04W72/04 ,  H04L27/00

Abstract: A user equipment, apparatus, and method are provided for wireless communication with at least one base station. The user equipment includes a transceiver configured to communicate with the at least one base station by transmitting radio frequency signals to the at least one base station and by receiving radio frequency signals from the at least one base station. The user equipment also includes processing circuitry. The processing circuitry is configured to identify an occupied signal bandwidth of the radio frequency signals. The processing circuitry is also configured to identify a spectral mask for the occupied signal bandwidth. The processing circuitry is also configured to identify an unused available spectrum between the occupied signal bandwidth and the spectral mask. The processing circuitry is also configured to modulate a spectral mask filling (SMF) signal in the unused available spectrum, the SMF signal configured to reduce the peak-to-average power ratio of the radio frequency signals.

公开(公告)号：US09838169B2

公开(公告)日：2017-12-05

申请号：US14823823

申请日：2015-08-11

Applicant: Samsung Electronics Co., Ltd.

Inventor： Sridhar Rajagopal ,  Rakesh Taori ,  Sudhir Ramakrishna ,  Jaspreet Singh ,  Shadi Abu-Surra

IPC: H04W4/00 ,  H04L5/00 ,  H04L27/26 ,  H04W72/04

CPC classification number: H04L5/0007 ,  H04L5/001 ,  H04L5/0091 ,  H04L27/2602 ,  H04W72/048

Abstract: A user equipment, apparatus, and method are provided for wireless communication using an IG-OFDM structure. An apparatus is configured to transmit a known reference signal. The apparatus is configured to receive, in response to the reference signal and from at least one user equipment (UE), capability information that includes at least one of the sub-band bandwidth or number of independently decodable sub-bands that can be dynamically turned on or off by the at least one UE. The apparatus is configured to define an interleaved guard OFDM (IG-OFDM) structure according to the received capability information, the IG-OFDM structure including guard tones distributed within an OFDM symbol where there is no signal transmission on these guard tones. The apparatus is configured to communicate with the at least one UE using a transmitted waveform that is shaped according to the IG-OFDM structure.

公开(公告)号：US09712187B2

公开(公告)日：2017-07-18

申请号：US14823744

申请日：2015-08-11

Applicant: Samsung Electronics Co., Ltd.

Inventor： Shadi Abu-Surra ,  Eran Pisek ,  Sridhar Rajagopal ,  Rakesh Taori

IPC: G11C29/00 ,  H03M13/11 ,  H03M13/00

CPC classification number: H03M13/1128 ,  H03M13/1111 ,  H03M13/1154 ,  H03M13/116 ,  H03M13/1177 ,  H03M13/618 ,  H03M13/6306 ,  H03M13/6362

Abstract: A receiver, such as a mobile station or base station, includes a sliding window-decoder. An antenna in the receiver is configured to receive a protograph-based spatially coupled low density parity check (SC-LDPC) code from a transmitter. The sliding window-decoder is configured to perform a SC-LDPC decoding operation on the SC-LDPC code using a sliding window. The SC-LDPC code includes a parity check matrix. The sliding window includes a subset of protograph sections on which decoding calculations are iteratively performed. The sliding window-decoder performs a stopping rule configured to cease the decoding calculations as a function of a syndrome of one or more check nodes (CNs) in the sliding window.

公开(公告)号：US20160295624A1

公开(公告)日：2016-10-06

申请号：US15080485

申请日：2016-03-24

Applicant: Samsung Electronics Co., Ltd

Inventor： Thomas David Novlan ,  Sridhar Rajagopal

IPC: H04W76/02 ,  H04W4/02 ,  H04W72/04 ,  H04L29/08

CPC classification number: H04W76/14 ,  H04L67/12 ,  H04W4/025 ,  H04W72/02 ,  H04W72/04 ,  H04W84/005

Abstract: A method of a first user equipment (UE) in a wireless vehicular communication network. The method includes receiving a plurality of messages including control and data messages from at least one second UE using at least one of multiple resource pools, wherein the plurality of messages comprise event-triggered or periodic traffic and the multiple resource pools comprise at least one of dedicated or shared resource pools. The method further includes determining the at least one of the multiple resource pools to transmit the plurality of messages to the at least one second UE, wherein multiple traffic types or priorities are multiplexed in the at least one of the multiple resource pools. The method further includes dynamically adjusting resource selection of the first UE within the at least one of the multiple resource pools based on a state of the wireless vehicular communication network and directly communicating the plurality of messages to the at least one second UE using the at least one of the multiple resource pools.

Abstract translation: 一种在无线车载通信网络中的第一用户设备（UE）的方法。 该方法包括使用多个资源池中的至少一个从至少一个第二UE接收包括控制和数据消息的多个消息，其中所述多个消息包括事件触发或周期性业务，并且所述多个资源池包括以下各项中的至少一个： 专用或共享资源池。 该方法还包括确定多个资源池中的至少一个以将多个消息发送到至少一个第二UE，其中在多个资源池中的至少一个资源池中多路复用多个业务类型或优先级。 该方法还包括基于无线车载通信网络的状态来动态地调整多个资源池内的至少一个资源池内的第一UE的资源选择，并使用至少一个第二UE直接将多个消息传送到至少一个第二UE 多个资源池之一。

公开(公告)号：US20160191132A1

公开(公告)日：2016-06-30

申请号：US14757415

申请日：2015-12-23

Applicant: Samsung Electronics Co., LTD

Inventor： Sridhar Rajagopal ,  Rakesh Taori

IPC: H04B7/06 ,  H04W72/04

CPC classification number: H04B7/063 ,  H04B7/0695 ,  H04B7/088 ,  H04W72/046

Abstract: Methods and apparatuses for association in a beamformed wireless area network (WLAN) are provided. A method for operating a station (STA) includes randomly selecting a plurality of sector sweep frames for association beam transmission within a frame-aligned transmit sector sweep duration in an association beamforming training duration of a beacon interval, transmitting a beam in each of the randomly selected sector sweep frames, and receiving sector sweep feedback from an access point (AP). A method for operating the AP includes receiving at least one transmission from one or more STAs on at least one of randomly selected sector sweep frames within the frame-aligned transmit sector sweep duration, selecting a sector identifier for transmissions from each of the one or more STAs based on the at least one received transmission, and transmitting grouped sector sweep feedback indicating the selected sector identifier for transmissions from each of the one or more STAs.

Abstract translation: 提供了在波束形成的无线区域网络（WLAN）中关联的方法和装置。 用于操作站（STA）的方法包括在信标间隔的关联波束形成训练持续时间内在帧对准的发射扇区扫描持续时间内随机选择用于关联波束传输的多个扇区扫描帧，在每个随机 选择的扇区扫描帧，以及从接入点（AP）接收扇区扫描反馈。 一种用于操作AP的方法包括：在帧对准的发射扇区扫描持续时间内的随机选择的扇区扫描帧中的至少一个上从一个或多个STA接收至少一个传输，从一个或多个 STA基于所述至少一个接收到的传输，并且发送分组的扇区扫描反馈，其指示所选择的扇区标识符用于来自所述一个或多个STA中的每一个的传输。