公开(公告)号：WO2022150518A1

公开(公告)日：2022-07-14

申请号：PCT/US2022/011501

申请日：2022-01-06

Applicant: LYNK GLOBAL, INC.

Inventor： SPEIDEL, Tyghe Robert

IPC: H04B7/185 ,  H04B7/01 ,  H04B7/212 ,  H04L27/04 ,  H04L27/12

Abstract: A satellite communications system can comprise at least one that satellite, an antenna structure deployed on the at least one satellite, and radio hardware coupled to the antenna structure that can provide for transmitting a first channel simultaneously with a second channel, wherein the first channel is transmitted using directive beams and the second channel is transmitted using a wide beam and wherein the directive beams are for data communication signals and the wide beam is for navigation signals.

公开(公告)号：WO2013003974A1

公开(公告)日：2013-01-10

申请号：PCT/CN2011/001088

申请日：2011-07-01

Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) ,  SONG, Xinghua ,  XIAO, Lei ,  ZHU, Huaisong

Inventor： SONG, Xinghua ,  XIAO, Lei ,  ZHU, Huaisong

IPC: H04B7/01

CPC classification number: H04B7/01 ,  H04B7/0604 ,  H04B7/0617 ,  H04B7/0626 ,  H04B7/0639 ,  H04B7/0689 ,  H04B7/086 ,  H04B7/2643 ,  H04B17/10 ,  H04B17/11 ,  H04L5/14

Abstract: The invention discloses a method and a base station for phase compensation in beamforming in a multi-antenna Time Division Duplex (TDD) communication network. In a first transmission mode, e.g. TM4 or TM8, the base station estimates a first phase shift between a first antenna port and a reference antenna port in uplink based on a measurement of a first Sounding Reference Signal (SRS). Then the base station estimates in the first transmission mode a second phase shift between the first antenna port and the reference antenna port in downlink based on a Channel State Information (CSI) feedback from a User Equipment (UE), and calculates a parameter indicative of a difference between the first phase shift and the second phase shift. In a second transmission mode, e.g. TM7 or TM8, the base station estimates a third phase shift between the first antenna port and the reference antenna port in uplink based on a measurement of a second SRS, and calculates in the second transmission mode, a fourth phase shift between the first antenna port and the reference antenna port in downlink as a difference between the third phase shift and the parameter. The base station then compensates in the second transmission mode, the phase of input signal on the first antenna port by the fourth phase shift for beamforming.

Abstract translation: 本发明公开了一种在多天线时分双工（TDD）通信网络中的波束成形中的相位补偿的方法和基站。 在第一传输模式中，例如， TM4或TM8，基站基于第一探测参考信号（SRS）的测量来估计上行链路中的第一天线端口和参考天线端口之间的第一相移。 然后，基站基于来自用户设备（UE）的信道状态信息（CSI）反馈，在第一传输模式中估计第一天线端口和下行链路中的参考天线端口之间的第二相移，并且计算表示 第一相移和第二相移之间的差。 在第二传输模式中，例如， TM7或TM8，基站基于第二SRS的测量来估计上行链路中的第一天线端口和参考天线端口之间的第三相移，并且在第二传输模式中计算第一天线端口与第二天线端口之间的第四相移 和下行链路中的参考天线端口作为第三相移与参数之间的差。 然后，基站在第二传输模式下补偿第一天线端口上的输入信号的相位，用于波束形成的第四相移。

公开(公告)号：WO2011003183A1

公开(公告)日：2011-01-13

申请号：PCT/CA2010/001034

申请日：2010-07-06

Applicant: NORTEL NETWORKS LIMITED ,  NOVAK, Robert ,  FONG, Mo-Han

Inventor： NOVAK, Robert ,  FONG, Mo-Han

IPC: H04B7/208 ,  H04B7/01 ,  H04W72/04

CPC classification number: H04W72/044 ,  H04B7/04 ,  H04L5/0048

Abstract: To facilitate ranging between mobile terminals and a base station in a wireless communication network employing orthogonal frequency division multiplexing (OFDM) for uplink data communications, a periodic ranging channel for use by a mobile terminal is defined. The channel specifies a plurality N of blocks of sub-carrier frequencies of an OFDM frequency band which are non-contiguous within the OFDM frequency band. The channel also specifies a time slot within an OFDM subframe which spans one or more OFDM symbol periods. A ranging transmission is periodically sent as a spread signal across the specified N blocks of sub-carrier frequencies within the specified time slot. The duration of the ranging transmission may be less than a duration of the OFDM subframe. A notional grid of tiles representing time and frequency resources associated with the subframe may facilitate channel definition. A similar approach may be used to define an initial access channel for initial access transmissions.

Abstract translation: 为了便于使用用于上行链路数据通信的正交频分复用（OFDM）的无线通信网络中的移动终端与基站之间的测距，定义了由移动终端使用的周期性测距信道。 信道指定在OFDM频带内不连续的OFDM频带的子载波频率的多个N个块。 该信道还指定跨越一个或多个OFDM符号周期的OFDM子帧内的时隙。 定时发送测距传输作为扩展信号跨越指定时隙内指定的N个子载波频率块。 测距传输的持续时间可以小于OFDM子帧的持续时间。 与子帧相关联的表示时间和频率资源的瓦片的概念网格可以促进信道定义。 可以使用类似的方法来定义用于初始接入传输的初始接入信道。

公开(公告)号：WO2009140338A3

公开(公告)日：2010-05-06

申请号：PCT/US2009043718

申请日：2009-05-13

Applicant: QUALCOMM INC ,  SIKRI DIVAYDEEP ,  ABRISHAMKAR FARROKH ,  YAN MING ,  DE LAURENTIIS NICO

Inventor： SIKRI DIVAYDEEP ,  ABRISHAMKAR FARROKH ,  YAN MING ,  DE LAURENTIIS NICO

IPC: H04B7/01 ,  H04L7/00 ,  H04W56/00

CPC classification number: H04W56/00 ,  H04B7/02

Abstract: A method for timing and frequency synchronization in a wireless system is provided. The method comprises the steps of receiving a burst of symbols, selecting a subset of the burst of symbols, iteratively adjusting the subset of the burst of symbols by a plurality of timing offsets and calculating, for each timing offset, a first performance metric corresponding to the adjusted subset. The method further comprises the steps of determining one of the plurality of timing offsets to be a preferred timing offset based upon the first performance metric thereof, iteratively rotating the subset of the burst of symbols by a plurality of frequency offsets and calculating, for each frequency offset, a second performance metric corresponding to the rotated subset, and determining one of the plurality of frequency offsets to be a preferred frequency offset based upon the second performance metric thereof.

Abstract translation: 提供了一种用于无线系统中的定时和频率同步的方法。 该方法包括以下步骤：接收符号脉冲串，选择符号脉冲串的子集，通过多个定时偏移迭代地调整符号脉冲串的子集，并且针对每个定时偏移量计算对应于 调整后的子集。 该方法还包括以下步骤：基于其第一性能度量，将多个定时偏移中的一个定时偏移确定为优选的定时偏移，将符号突发的子集迭代地旋转多个频率偏移，并且针对每个频率 偏移量，对应于旋转的子集的第二性能量度，以及基于其第二性能度量，将所述多个频率偏移中的一个确定为优选频率偏移。

公开(公告)号：WO2009143691A1

公开(公告)日：2009-12-03

申请号：PCT/CN2009/000339

申请日：2009-03-30

Applicant: 中国移动通信集团上海有限公司 ,  刘之浩 ,  芮鹤龄 ,  孟忻

Inventor： 刘之浩 ,  芮鹤龄 ,  孟忻

IPC: H04B7/01

CPC classification number: H04L27/0014

公开(公告)号：WO2009098189A1

公开(公告)日：2009-08-13

申请号：PCT/EP2009/051168

申请日：2009-02-03

Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) ,  LIPKA, Dietmar

Inventor： LIPKA, Dietmar

IPC: H04B7/01

CPC classification number: H04B7/01 ,  H04W56/0035

Abstract: A technique for performing a random access procedure in a fast moving mobile device (100) in context with accessing a radio base station (101 ) is described. A method embodiment of the technique comprises tuning a receiver (106) of the mobile device (100) to an expected frequency of a pilot signal (136) provided by the base station (101 ); determining, based on an output signal of the receiver (140), a feedback signal (142) for locking the receiver (106) to a receive frequency of the pilot signal (136); providing the feedback signal (148) to a transmitter (108) of the mobile device (100); and adjusting a transmission frequency of a random access signal (154) according to a frequency offset between the expected frequency and the receive frequency of the pilot signal (136) indicated by the feedback signal (148).

Abstract translation: 描述了一种用于在接入无线电基站（101）的上下文中在快速移动的移动设备（100）中执行随机接入过程的技术。 该技术的方法实施例包括将移动设备（100）的接收机（106）调谐到由基站（101）提供的导频信号（136）的期望频率; 基于所述接收器（140）的输出信号，确定用于将所述接收器（106）锁定到所述导频信号（136）的接收频率的反馈信号（142）。 将所述反馈信号（148）提供给所述移动设备（100）的发射机（108）; 以及根据由反馈信号（148）指示的导频信号（136）的预期频率和接收频率之间的频率偏移来调整随机接入信号（154）的发射频率。

公开(公告)号：WO2005057825A3

公开(公告)日：2007-06-14

申请号：PCT/US2004014194

申请日：2004-05-07

Applicant: NOKIA CORP ,  NOKIA INC ,  TERRY JOHN ,  TIRKKONNEN OLAV

Inventor： TERRY JOHN ,  TIRKKONNEN OLAV

IPC: H04J9/00 ,  H04B7/005 ,  H04B7/01 ,  H04B7/02 ,  H04L20060101 ,  H04L27/00 ,  H04Q7/24

CPC classification number: H04L1/0618 ,  H04B7/02 ,  H04L1/007

Abstract: Apparatus, and an associated method, for facilitating communication of communication data upon a communication channel susceptible to distortion. Both diversity techniques and spatial multiplexing techniques are utilized to compensate for the distortion introduced upon the data during its communication. Separate parts of the communication data are mapped pursuant data are mapped pursuant to separate mapping schemes. The mapping schemes are selected to exhibit different properties. When the communication data is communicated upon the communication channel and delivered to a receiving station, a decoder decodes the data to recover the informational content of the data.

Abstract translation: 装置和相关联的方法，用于在易于失真的通信信道上促进通信数据的通信。 利用分集技术和空间复用技术来补偿在其通信期间引入的数据失真。 通过数据映射的通信数据的单独部分根据单独的映射方案进行映射。 选择映射方案以显示不同的属性。 当通信数据在通信信道上传送并传送到接收站时，解码器解码数据以恢复数据的信息内容。

公开(公告)号：WO2007040685A1

公开(公告)日：2007-04-12

申请号：PCT/US2006/024615

申请日：2006-06-23

Applicant: MOTOROLA, INC. ,  KAZMI, Zaigham A.

Inventor： KAZMI, Zaigham A.

IPC: H04B7/01

CPC classification number: H04B7/2693

Abstract: A method and system for achieving timeframe alignment between a Centralized Base Station Controller (CBSC) (106) and a Base Transceiver Site (BTS) (102) in a network is disclosed. The BTS returns a Forward Sequence Number (FSN) contained in a forward frame and a Packet Arrival Time Error (PATE) to the CBSC. The CBSC computes a Round Trip Time (RTT), using the FSN. The CBSC also computes a forward Coordinated Universal Time (UTC), using the RTT and the PATE. Thereafter, a CBSC transmission time is adjusted to align with the BTS, based on the adjusted UTC.

Abstract translation: 公开了一种用于实现网络中的集中式基站控制器（CBSC）（106）和基站收发器站点（BTS）（102）之间的时间帧对准的方法和系统。 BTS将包含在前向帧中的转发序列号（FSN）和分组到达时间错误（PATE）返回给CBSC。 CBSC使用FSN计算往返时间（RTT）。 CBSC还使用RTT和PATE计算前向协调世界时（UTC）。 此后，基于经调整的UTC，调整CBSC发送时间以与BTS一致。

公开(公告)号：WO2007013938A3

公开(公告)日：2007-03-22

申请号：PCT/US2006028091

申请日：2006-07-19

Applicant: QUALCOMM FLARION TECH ,  LANE FRANK A ,  LAROIA RAJIV ,  LI JUNYI

Inventor： LANE FRANK A ,  LAROIA RAJIV ,  LI JUNYI

IPC: H04B7/01 ,  G01S5/00 ,  H04B7/208 ,  H04W56/00 ,  H04W92/10

CPC classification number: H04B7/01 ,  G01S5/0009 ,  G01S5/0284 ,  H04W56/0025 ,  H04W56/0035 ,  H04W56/006 ,  H04W92/10

Abstract: A wireless terminal determines the position of a moving base station and determines timing and/or frequency corrections. A wireless terminal determines its relative position with respect to the base station and determines a timing adjustment correction. The wireless terminal applies the determined timing correction to control uplink signaling timing and achieve synchronization at the base station's receiver. The wireless terminal determines its relative velocity with respect to the moving base station and determines a Doppler shift adjustment which it adds to the uplink carrier frequency or to its baseband signal. Base station position is determined from the current time and stored information correlating the base station position with time, e.g., for a geo-synchronous satellite. Base station position information, e.g., a GPS derived base station position fix, is determined from downlink airlink broadcast information, e.g., for an aircraft base station. Wireless terminals may be mobile and include a GPS receiver for wireless terminal position determination.

Abstract translation: 无线终端确定移动基站的位置并确定定时和/或频率校正。 无线终端确定其相对于基站的相对位置并确定定时调整校正。 无线终端应用所确定的定时校正来控制上行链路信令定时并在基站的接收机处实现同步。 无线终端确定其相对于移动基站的相对速度并确定其增加到上行链路载波频率或其基带信号的多普勒频移。 基站位置由当前时间确定，并存储使基站位置与时间相关的信息，例如用于地球同步卫星。 基站位置信息，例如GPS导出的基站位置定位，是从下行链路空中链路广播信息中确定的，例如，用于飞机基站。 无线终端可以是移动的并且包括用于无线终端位置确定的GPS接收机。

公开(公告)号：WO2006105297A3

公开(公告)日：2007-02-08

申请号：PCT/US2006011648

申请日：2006-03-28

Applicant: QUALCOMM INC ,  CHEN PEI ,  FERNANDEZ-CORBATON IVAN JESUS

Inventor： CHEN PEI ,  FERNANDEZ-CORBATON IVAN JESUS

IPC: H04B7/01 ,  H04B17/00 ,  H04W56/00

CPC classification number: H04W56/0035 ,  H04B7/01 ,  H04B7/18506 ,  H04B17/336

Abstract: At least one embodiment of the invention provides an automated frequency offset compensation method, system, and apparatus that improves throughput between one or more wireless communication devices by compensating for frequency offsets caused by a Doppler effect. In particular, one implementation estimates the frequency offset and uses this to compensate the carrier signal power to interference power ratio (C/I) when the transmitting and receiving devices are moving relative to each other such that a Doppler effect creates a frequency offset in the perceived frequency of the received carrier signal.

Abstract translation: 本发明的至少一个实施例提供了通过补偿由多普勒效应引起的频率偏移来提高一个或多个无线通信设备之间的吞吐量的自动频率偏移补偿方法，系统和装置。 特别地，一种实施方式估计频率偏移，并且当发射和接收装置相对于彼此移动时，使用它来补偿载波信号功率与干扰功率比（C / I），使得多普勒效应在 接收的载波信号的感知频率。