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    METHODS AND APPARATUS TO TRANSMIT AND RECEIVE SYNCHRONIZATION SIGNALS IN A MOBILE COMMUNICATION SYSTEM
    21.
    发明申请
    METHODS AND APPARATUS TO TRANSMIT AND RECEIVE SYNCHRONIZATION SIGNALS IN A MOBILE COMMUNICATION SYSTEM 有权
    在移动通信系统中发送和接收同步信号的方法和装置

    公开(公告)号：US20130235851A1

    公开(公告)日：2013-09-12

    申请号：US13652279

    申请日：2012-10-15

    Applicant: SAMSUNG ELECTRONICS CO., LTD.

    Inventor： Shadi Abu-Surra ,  Sridhar Rajagopal ,  Ying Li ,  Jaspreet Singh ,  Zhouyue Pi

    IPC: H04W72/04

    CPC classification number: H04W72/044 ,  H04B7/0408 ,  H04B7/0891 ,  H04J11/0069 ,  H04W56/00 ,  H04W72/042

    Abstract: Beam-steered millimeter wave signals transmitted in each of n sector slices include a sequence of primary synchronization (PSCH) symbols within predetermined symbol positions in at least one slot of a subframe. The symbols in consecutive symbol positions are each transmitted on a different one of the n slices, with the first symbol repeated on the same slice at the end. The sequence order rotates cyclically in each subframe so that two PSCH symbols are transmitted on one slice in a single subframe every nth subframe. Secondary synchronization (SSCH) and Broadcast Channel (BCH) symbols are transmitted in a predetermined pattern following the sequence of PSCH symbols. By transmitting consecutive PSCH symbols on different slices and repeating the first symbol, the mobile station can detect the best slice and beam by switching receive beams every subframe instead of every slot, relaxing time constraints on AGC adjustment while avoiding the start-at-the-edge problem.

    Abstract translation: 在n个扇区片段中的每一个中发送的光束转向毫米波信号包括在子帧的至少一个时隙中的预定符号位置内的主同步（PSCH）符号序列。 连续符号位置中的符号各自在n个片上的不同的一个上被发送，其中第一个符号在最后的同一片上重复。 序列顺序在每个子帧中循环旋转，使得在每第n个子帧中在单个子帧中的一个片上发送两个PSCH符号。 按照PSCH符号序列之后的预定模式发送辅同步（SSCH）和广播信道（BCH）符号。 通过在不同的片上发送连续的PSCH符号并重复第一个符号，移动台可以通过每个子帧而不是每个时隙切换接收波束来检测最佳切片和波束，放宽对AGC调整的时间约束，同时避免起始时间， 边缘问题。

    METHODS AND APPARATUS FOR CALIBRATION AND ARRAY OPERATION IN ADVANCED MIMO SYSTEM
    22.
    发明申请
    METHODS AND APPARATUS FOR CALIBRATION AND ARRAY OPERATION IN ADVANCED MIMO SYSTEM 审中-公开

    公开(公告)号：US20180254839A1

    公开(公告)日：2018-09-06

    申请号：US15891244

    申请日：2018-02-07

    Applicant: Samsung Electronics Co., Ltd

    Inventor： Jin Yuan ,  Yang Li ,  Gary Xu ,  Robert Monroe ,  Jianzhong Zhang ,  Sridhar Rajagopal

    IPC: H04B17/12 ,  H04B1/40 ,  H04B7/04

    Abstract: A method for a transceiver calibration and antenna array operation in a multi-input multi-output (MIMO) system. The method comprises sending a calibration signal and a pre-designed training sequence, via a coupling network, receiving a calibration signal and a pre-designed training sequence that is sent a the transceiver array in a time slotted pattern via a coupling network, generating an Rx calibration measurement (R1) based on one or more uplink signals received via antenna array and the coupling network, generating a Tx calibration measurement (T1) based on receipt of the calibration signal from each of antennas via the coupling network; and performing a joint Tx/Rx (TRx) calibration based on HR, R1, and T1, where H is a channel response in air interface, R is a channel response of receivers in transceiver array.

    Methods and apparatus for cyclic prefix reduction in MMwave mobile communication systems
    27.
    发明授权
    Methods and apparatus for cyclic prefix reduction in MMwave mobile communication systems 有权
    MMwave移动通信系统循环前缀减少的方法和装置

    公开(公告)号：US09531573B2

    公开(公告)日：2016-12-27

    申请号：US13856797

    申请日：2013-04-04

    Applicant: Samsung Electronics Co., LTD

    Inventor： Sridhar Rajagopal ,  Shadi Abu-Surra ,  Ankit Gupta ,  Sudhir Ramakrishna ,  Kaushik Josiam ,  Zhouyue Pi ,  Ying Li

    IPC: H04K1/10 ,  H04L27/28 ,  H04L27/26 ,  H04J13/00 ,  H04B7/06 ,  H04L1/00

    CPC classification number: H04L27/2607 ,  H04B7/0695 ,  H04J13/0062 ,  H04L1/0031 ,  H04L27/261

    Abstract: To reduce the duration of a cyclic prefix used for a multiple input, multiple output (MIMO) communications channel, delay spread variations for different transmit/receive beam pair combination is estimated and used for fast beam switching and to support single user MIMO (SU-MIMO) even when the CP difference between two beams is large. Beam switching reference signals are employed to estimate delay spread exceeding current CP, and to support beam switching. CP covering sub-clusters within clusters for the MIMO channel are exploited to reduce the CP requirement and improve efficiency. Any one of a number of different CP durations may be selected for each different mobile station, using one of a finite set of subframe configurations for which the CP durations of different symbol locations within the subframe are predefined. Dynamically switching subframe configurations by the system accommodates high mobility.

    Abstract translation: 为了减少用于多输入的循环前缀的持续时间，多输出（MIMO）通信信道，用于不同发射/接收波束对组合的延迟扩展变化被估计并用于快速波束切换并且支持单用户MIMO（SU- MIMO），即使两个波束之间的CP差异较大。 采用光束切换参考信号来估计超过当前CP的延迟扩展，并支持波束切换。 覆盖用于MIMO信道的群集内的子簇的CP被利用以减少CP需求并提高效率。 可以使用预定义子帧内不同符号位置的CP持续时间的子帧配置的有限集合之一来为每个不同移动台选择多个不同CP持续时间中的任何一个。 通过系统动态切换子帧配置可以实现高移动性。

    Apparatus and methods for flexible RF configuration in multi-antenna wireless systems
    28.
    发明授权
    Apparatus and methods for flexible RF configuration in multi-antenna wireless systems 有权
    多天线无线系统中灵活RF配置的装置和方法

    公开(公告)号：US09185705B2

    公开(公告)日：2015-11-10

    申请号：US13899148

    申请日：2013-05-21

    Applicant: Samsung Electronics Co., LTD

    Inventor： Sridhar Rajagopal ,  Richard Stirling-Gallacher ,  Krishna Sayana ,  Jianzhong Zhang ,  Farooq Khan

    IPC: H04W80/04 ,  H04W52/40 ,  H04W72/04 ,  H04L5/00 ,  H04W24/00 ,  H04W84/12 ,  H04B7/04 ,  H04B7/06 ,  H04L27/00

    CPC classification number: H04W72/0453 ,  H04B1/406 ,  H04B7/0413 ,  H04B7/0669 ,  H04B7/0671 ,  H04B7/068 ,  H04L5/00 ,  H04L5/001 ,  H04L27/0006 ,  H04W24/00 ,  H04W84/12

    Abstract: An apparatus includes a baseband signal processing block, processing circuitry, and at least one radio frequency (RF) communication module communicably coupled to the baseband signal processing block and configured to communicate using a selected mode of communication in a channel. The processing circuitry is configured to detect a sub-channel band of unavailable spectrum within the channel, the band of unavailable spectrum being less than a whole of the channel. The channel includes one contiguous band of frequencies divisible into at least two non-overlapping non-adjacent sub-channels. The processing circuitry is configured to select one mode of communication selected from a plurality of modes including: a carrier aggregation (CA) only mode, a multiple input multiple output (MIMO) only mode, and a carrier aggregation multiple input multiple output (CA-MIMO) hybrid mode.

    Abstract translation: 一种装置包括基带信号处理块，处理电路和至少一个可通信地耦合到基带信号处理块的射频（RF）通信模块，并被配置为使用通道中选择的通信模式进行通信。 处理电路被配置为检测信道内的不可用频谱的子信道频带，不可用频谱的频带小于整个信道。 信道包括可分为至少两个非重叠的非相邻子信道的一个连续频带。 所述处理电路被配置为选择从多种模式中选择的一种通信模式，所述多种模式包括：仅载波聚合（CA）模式，仅多输入多输出（MIMO）模式和载波聚合多输入多输出（CA- MIMO）混合模式。

    Beam management for wireless communication
    29.
    发明授权
    Beam management for wireless communication 有权
    光束管理无线通信

    公开(公告)号：US09137698B2

    公开(公告)日：2015-09-15

    申请号：US13772047

    申请日：2013-02-20

    Applicant: Samsung Electronics Co., LTD

    Inventor： Ying Li ,  Zhouyue Pi ,  Shadi Abu-Surra ,  Sridhar Rajagopal ,  Kaushik Josiam

    IPC: H04L12/801 ,  H04L12/26 ,  H04W52/02 ,  H04W52/24 ,  H04W52/50 ,  H04W24/10 ,  H04W72/04 ,  H04B7/06

    CPC classification number: H04W24/10 ,  H04B7/0617 ,  H04B7/0619 ,  H04B7/0689 ,  H04B7/0862 ,  H04W72/046

    Abstract: Methods and apparatuses manage beam selection. A method for a mobile station (MS) includes identifying beamforming constraints of the MS. The method also includes performing measurement on a channel between a base station (BS) and the MS on at least one transmit (TX) beam and at least one receive (RX) beam. Additionally, the method includes sending beamforming feedback information based on the identified constraints of the MS and the channel measurement. A method for a base station (BS) includes receiving beamforming feedback information comprising at least one of radio frequency beamforming constraints of a mobile station or channel measurement information on a channel between the BS and the MS. Additionally, the method includes sending, to the MS, control information comprising an indication of at least one of MS RX beams or BS TX beams to be used in downlink communication with the MS based on the received beamforming feedback information.

    Abstract translation: 方法和设备管理波束选择。 移动站（MS）的方法包括识别MS的波束成形约束。 该方法还包括在至少一个发射（TX）波束和至少一个接收（RX）波束上的基站（BS）和MS之间的信道上执行测量。 另外，该方法包括基于所识别的MS约束和信道测量发送波束成形反馈信息。 一种用于基站（BS）的方法包括：接收波束形成反馈信息，该反馈信息包括移动站的射频波束成形约束中的至少一个或在BS与MS之间的信道上的信道测量信息。 另外，该方法包括：向MS发送控制信息，该控制信息包括基于所接收的波束成形反馈信息，MS与MS之间的MS RX波束或BS TX波束中的至少一个的指示。

    Apparatus and method for reference symbol transmission in an OFDM system
    30.
    发明授权
    Apparatus and method for reference symbol transmission in an OFDM system 有权
    OFDM系统中参考符号传输的装置和方法

    公开(公告)号：US09077415B2

    公开(公告)日：2015-07-07

    申请号：US13678795

    申请日：2012-11-16

    Applicant: Samsung Electronics Co., Ltd

    Inventor： Kaushik Josiam ,  Shadi Abu-Surra ,  Ying Li ,  Sridhar Rajagopal ,  Zhouyue Pi

    IPC: H04B7/02 ,  H04L27/00 ,  H04B7/06 ,  H04L5/00 ,  H04L25/02

    CPC classification number: H04B7/0697 ,  H04B7/0617 ,  H04L5/0023 ,  H04L5/0048 ,  H04L25/0204 ,  H04L25/0224

    Abstract: A base station is capable of communicating with a plurality of subscriber stations using a beamforming scheme that varies beams over different time instances. The base station includes a plurality of antenna arrays configured to transmit N spatial beams and carry a reference symbols corresponding to specific spatial beams. The base station also includes NRF number of radio frequency (RF) processing chains coupled to respective ones of the plurality of antenna arrays, wherein N>>NRF. The subscriber station includes MRF processing receive paths configured to receive M number of beams from the base station.

    Abstract translation: 基站能够使用在不同时间实例上改变波束的波束成形方案与多个用户台进行通信。 基站包括多个天线阵列，其被配置为发送N个空间波束并携带对应于特定空间波束的参考符号。 基站还包括耦合到多个天线阵列中的相应天线阵列的NRF数量的射频（RF）处理链，其中N >> NRF。 用户站包括被配置为从基站接收M个波束的MRF处理接收路径。

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