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公开(公告)号：US20160134339A1
公开(公告)日：2016-05-12
申请号：US15000542
申请日：2016-01-19
Applicant: APPLE INC.
Inventor： Wen Tong , Ming Jia , Jianglei Ma , Peiying Zhu , Hua Xu , Dong-Sheng Yu , Hang Zhang , Mo-Han Fong
CPC classification number: H04B7/0478 , H04B7/0413 , H04B7/0617 , H04B7/0619 , H04B7/0671 , H04B7/0673 , H04B7/0691 , H04L5/0007 , H04L5/0023 , H04L5/0028 , H04L5/005 , H04L5/006 , H04L5/023 , H04L27/2601 , H04W48/08 , H04W72/042 , H04W72/044 , H04W72/08 , H04W74/06
Abstract: Systems and methods for closed loop MIMO (multiple input and multiple output) wireless communication are provided. Various transmit formats including spatial multiplexing and STTD are defined in which vector or matrix weighting is employed using information fed back from receivers. The feedback information may include channel matrix or SVD-based feedback.
Abstract translation: 提供了闭环MIMO（多输入和多输出）无线通信的系统和方法。 定义了包括空间复用和STTD在内的各种发送格式，其中使用从接收机反馈的信息的向量或矩阵加权。 反馈信息可以包括信道矩阵或基于SVD的反馈。
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162.发明授权公开(公告)号：US09331880B2
公开(公告)日：2016-05-03
申请号：US14458131
申请日：2014-08-12
Applicant: Apple Inc.
Inventor： Jianglei Ma , Ming Jia , Wen Tong , Peiying Zhu , Hang Zhang , Mo-Han Fong
CPC classification number: H04L5/0051 , H04L1/0003 , H04L1/0009 , H04L1/0618 , H04L5/0007 , H04L5/0023 , H04L5/0048 , H04L5/005 , H04L25/02 , H04L27/2602 , H04L27/2613 , H04L27/2647 , H04W52/325
Abstract: Aspects of the invention include methods and devices for inserting data and pilot symbols into Orthogonal Frequency Division Multiplexing (OFDM) frames having a time domain and a frequency domain. A method involves inserting in at least one zone of a first type a two dimensional array of data and pilot symbols in time and frequency and inserting in at least one zone of a second type a two dimensional array of data and pilot symbols in time and frequency. In some implementations the zone of the first type comprises common pilot symbols that can be detected by all receivers receiving the OFDM frame. In some implementations the zone of the second type comprises dedicated pilot symbols that are only detectable by a receiver that is aware of pre-processing used to encode the dedicated pilot symbols.
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公开(公告)号：US09106288B2
公开(公告)日：2015-08-11
申请号：US14493591
申请日：2014-09-23
Applicant: Apple Inc.
Inventor： Jianglei Ma , Ming Jia , Hua Xu , Wen Tong , Peiying Zhu , Moussa Abdi
IPC: H04K1/10 , H04B7/04 , H04L5/00 , H04L27/26 , H04W72/04 , H04W88/08 , H04J13/18 , H04L1/06 , H04L25/02 , H04J13/16
CPC classification number: H04B7/0452 , H04B7/0413 , H04J13/18 , H04J2013/165 , H04L1/0625 , H04L5/001 , H04L5/0026 , H04L5/0032 , H04L5/0048 , H04L5/005 , H04L5/0051 , H04L25/0226 , H04L25/0228 , H04L27/2613 , H04W72/04 , H04W72/044 , H04W88/08
Abstract: The present invention employs a pilot scheme for frequency division multiple access (FDM) communication systems, such as single carrier FDM communication systems. A given transmit time interval (TTI) may include numerous traffic symbols and one or more pilot symbols. A mobile terminal may generate, for a transmitter, sounding pilot information and map the sounding pilot information onto at least certain sub-carriers within a TTI. The one or more pilot symbols may include at least a first group of subcarriers and at least a second group of subcarriers. The first group of subcarriers may be sounding pilots and the second group of subcarriers may be pilots for demodulation. The second group may not include sounding pilots.
Abstract translation: 本发明采用诸如单载波FDM通信系统的频分多址（FDM）通信系统的导频方案。 给定的传输时间间隔（TTI）可以包括许多业务符号和一个或多个导频符号。 移动终端可以为发射机生成探测导频信息，并将探测导频信息映射到TTI内的至少某些子载波。 一个或多个导频符号可以包括至少第一组子载波和至少第二组副载波。 第一组子载波可以是探测导频，并且第二组子载波可以是用于解调的导频。 第二组可能不包括探空飞行员。
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公开(公告)号：US09049620B2
公开(公告)日：2015-06-02
申请号：US14293170
申请日：2014-06-02
Applicant: Apple Inc.
Inventor： Hang Zhang , Mo-Han Fong , Peiying Zhu , Jianglei Ma , Wen Tong
CPC classification number: H04W24/10 , H04B7/155 , H04W72/0406 , H04W84/047 , H04W88/04
Abstract: A method and system for wireless communication with a mobile device in which wireless communication is established with the mobile device. A base station is used to transmit directly to the mobile device in a downlink direction. A relay node is used to transmit to the base station communications received in an uplink direction from the mobile station. The relay node relays at least a portion of the uplink traffic received from the mobile station to the base station.
Abstract translation: 一种与移动设备进行无线通信的方法和系统，其中与移动设备建立无线通信。 基站用于在下行链路方向上直接发送到移动设备。 中继节点用于向基站发送从移动台沿上行方向接收的通信。 中继节点将从移动站接收的上行链路业务的至少一部分中继到基站。
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公开(公告)号：US20150085821A1
公开(公告)日：2015-03-26
申请号：US14557319
申请日：2014-12-01
Applicant: Apple Inc.
Inventor： Jianglei Ma , Ming Jia , Wen Tong , Peiying Zhu , Hua Xu , Hang Zhang , Mo-Han Fong
CPC classification number: H04J13/0003 , H04B1/707 , H04B7/0404 , H04B7/0678 , H04J13/00 , H04J13/16 , H04L5/0016 , H04L5/0026 , H04L5/0048 , H04L5/005 , H04L25/0204 , H04L25/0226 , H04L25/0232 , H04L25/03866 , H04L27/2613 , H04L27/2627 , H04W72/044
Abstract: In some embodiments of the invention, OFDM symbols are transmitted as a plurality of clusters. A cluster includes a plurality of OFDM sub-carriers in frequency, over a plurality of OFDM symbol durations in time. Each cluster includes data as well as pilot information as a reference signal for channel estimation. In some embodiments, a plurality of clusters collectively occupy the available sub-carrier set in the frequency domain that is used for transmission. In some embodiments of the invention data and/or pilots are spread within each cluster using code division multiplexing (CDM). In some embodiments pilots and data are separated by distributing data on a particular number of the plurality of OFDM symbol durations and pilots on a remainder of the OFDM symbol durations. CDM spreading can be performed in time and/or frequency directions.
Abstract translation: 在本发明的一些实施例中，OFDM符号作为多个簇发送。 在多个OFDM符号持续时间内，群集包括频率上的多个OFDM子载波。 每个簇包括数据以及作为信道估计的参考信号的导频信息。 在一些实施例中，多个集群共同地占用用于传输的频域中的可用子载波集合。 在本发明的一些实施例中，使用码分多路复用（CDM）在每个簇内扩展数据和/或导频。 在一些实施例中，通过在OFDM码元持续时间的其余部分上分配关于多个OFDM符号持续时间的特定数目和导频上的数据来分离导频和数据。 可以在时间和/或频率方向上执行CDM扩展。
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Patent Agency Ranking
公开(公告)号：US08947994B2
公开(公告)日：2015-02-03
申请号：US14251627
申请日：2014-04-13
Applicant: Apple Inc.
Inventor： Jianglei Ma , Wen Tong , Ming Jia , Hua Xu , Peiying Zhu , Hang Zhang
CPC classification number: H04L27/263 , H04L1/0003 , H04L1/0009 , H04L5/0007 , H04L5/0023 , H04L5/0044 , H04L5/0096 , H04L27/2613 , H04L27/2628 , H04L27/2634 , H04L27/2646
Abstract: Methods and systems are provided that enable an OFDM transmitter to be used for transmitting conventional OFDM or a form of transformed OFDM. A technique is provided for transforming a coded and modulated sequence of samples prior to an IFFT that enables the transformed sequence of samples to be transmitted using conventional OFDM or transformed OFDM. The selection of a transform function for transforming the coded and modulated sequence of samples may be based on optimizing the transform function for particular operating conditions between the transmitter and receiver. In some embodiments of the invention OFDM and time transformed OFDM are multiplexed in time and/or frequency in a transmission frame. In some embodiments of the invention a pilot pattern is provided in which the pilot are sent using OFDM and data is sent using OFDM and/or transformed OFDM.
Abstract translation: 提供了使OFDM发射机能够用于传输常规OFDM或变换OFDM形式的方法和系统。 提供了一种用于在IFFT之前变换样本的编码和调制序列的技术，其使得能够使用常规OFDM或变换OFDM来发送变换的样本序列。 用于变换样本的编码和调制序列的变换函数的选择可以基于优化发射机和接收机之间的特定操作条件的变换函数。 在本发明的一些实施例中，OFDM和时变OFDM在传输帧中以时间和/或频率被复用。 在本发明的一些实施例中，提供了导频模式，其中使用OFDM发送导频，并且使用OFDM和/或经变换的OFDM发送数据。
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公开(公告)号：US08842756B2
公开(公告)日：2014-09-23
申请号：US13665982
申请日：2012-11-01
Applicant: Apple Inc.
Inventor： Jianglei Ma , Ming Jia , Hua Xu , Wen Tong , Peiying Zhu , Dong-Sheng Yu , Hang Zhang
IPC: H04K1/10
CPC classification number: H04L27/2611 , H04B7/06 , H04B7/08 , H04L5/0007 , H04L5/0023 , H04L25/0226 , H04L25/0232 , H04L27/2626 , H04L27/2647
Abstract: A method and apparatus for improving channel estimation within an OFDM communication system. Channel estimation in OFDM is usually performed with the aid of pilot symbols. The pilot symbols are typically spaced in time and frequency. The set of frequencies and times at which pilot symbols are inserted is referred to as a pilot pattern. In some cases, the pilot pattern is a diagonal-shaped lattice, either regular or irregular. The method first interpolates in the direction of larger coherence (time or frequency). Using these measurements, the density of pilot symbols in the direction of faster change will be increased thereby improving channel estimation without increasing overhead. As such, the results of the first interpolating step can then be used to assist the interpolation in the dimension of smaller coherence (time or frequency).
Abstract translation: 一种用于改善OFDM通信系统内的信道估计的方法和装置。 OFDM中的信道估计通常借助于导频符号来执行。 导频符号通常在时间和频率上间隔开。 将导频符号插入的频率和时间的集合称为导频模式。 在一些情况下，导频图案是对角线形格子，规则的或不规则的。 该方法首先在较大相干性（时间或频率）的方向内插。 使用这些测量，导频符号在更快变化方向上的密度将增加，从而改善信道估计而不增加开销。 因此，第一内插步骤的结果然后可以用于辅助尺寸较小的相干性（时间或频率）的内插。
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168.发明申请公开(公告)号：US20140269489A1
公开(公告)日：2014-09-18
申请号：US14293170
申请日：2014-06-02
Applicant: Apple Inc.
Inventor： Hang Zhang , Mo-Han Fong , Peiying Zhu , Jianglei Ma , Wen Tong
CPC classification number: H04W24/10 , H04B7/155 , H04W72/0406 , H04W84/047 , H04W88/04
Abstract: A method and system for wireless communication with a mobile device in which wireless communication is established with the mobile device. A base station is used to transmit directly to the mobile device in a downlink direction. A relay node is used to transmit to the base station communications received in an uplink direction from the mobile station. The relay node relays at least a portion of the uplink traffic received from the mobile station to the base station.
Abstract translation: 一种与移动设备进行无线通信的方法和系统，其中与移动设备建立无线通信。 基站用于在下行链路方向上直接发送到移动设备。 中继节点用于向基站发送从移动台沿上行方向接收的通信。 中继节点将从移动站接收的上行链路业务的至少一部分中继到基站。
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公开(公告)号：US20140211778A1
公开(公告)日：2014-07-31
申请号：US14231595
申请日：2014-03-31
Applicant: Apple Inc.
Inventor： Ming Jia , Jianglei Ma , Peiying Zhu , Wen Tong , Hua Xu , Hang Zhang
CPC classification number: H04L5/0058 , H04B7/0602 , H04B7/0671 , H04B7/2621 , H04J11/00 , H04L1/0003 , H04L1/0625 , H04L5/0007 , H04L5/0023 , H04L5/0044 , H04L5/0048 , H04L5/0091 , H04L27/2615 , H04L27/2626 , H04L27/2636
Abstract: The present application provides methods, devices and transmitters that mitigate increases in peak to average power ratio (PAPR) from transmission diversity in a single carrier frequency division multiple access (SC-FDMA) modulated uplink. A PAPR preserving precode matrix hopping method that utilizes cyclic shift delays is provided, as well as a sub-band based transmit diversity scheme. The present application also provides methods, devices and transmitters that relax the scheduling restrictions associated with uplink scheduling in the LTE standard.
Abstract translation: 本申请提供了在单载波频分多址（SC-FDMA）调制的上行链路中减轻来自传输分集的峰均功率比（PAPR）的增加的方法，装置和发射机。 提供了利用循环移位延迟的PAPR保留预编码矩阵跳频方法以及基于子带的发射分集方案。 本申请还提供了放宽与LTE标准中的上行链路调度相关联的调度限制的方法，设备和发射机。
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公开(公告)号：US20140119471A1
公开(公告)日：2014-05-01
申请号：US13944022
申请日：2013-07-17
Applicant: Apple Inc.
Inventor： Jianglei Ma , Ming Jia , Wen Tong , Peiying Zhu , Hang Zhang , Hua Xu , Dong-Sheng Yu
IPC: H04L27/26
CPC classification number: H04L27/2611 , H04B7/06 , H04B7/08 , H04L5/0007 , H04L5/0023 , H04L25/0226 , H04L25/0232 , H04L27/2626 , H04L27/2647
Abstract: A method and apparatus for improving channel estimation within an OFDM communication system. Channel estimation in OFDM is usually performed with the aid of pilot symbols. The pilot symbols are typically spaced in time and frequency. The set of frequencies and times at which pilot symbols are inserted is referred to as a pilot pattern. In some cases, the pilot pattern is a diagonal-shaped lattice, either regular or irregular. The method first interpolates in the direction of larger coherence (time or frequency). Using these measurements, the density of pilot symbols in the direction of faster change will be increased thereby improving channel estimation without increasing overhead. As such, the results of the first interpolating step can then be used to assist the interpolation in the dimension of smaller coherence (time or frequency).
Abstract translation: 一种用于改善OFDM通信系统内的信道估计的方法和装置。 OFDM中的信道估计通常借助于导频符号来执行。 导频符号通常在时间和频率上间隔开。 将导频符号插入的频率和时间的集合称为导频模式。 在一些情况下，导频图案是对角线形格子，规则的或不规则的。 该方法首先在较大相干性（时间或频率）的方向内插。 使用这些测量，导频符号在更快变化方向上的密度将增加，从而改善信道估计而不增加开销。 因此，第一内插步骤的结果然后可以用于辅助尺寸较小的相干性（时间或频率）的内插。
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