公开(公告)号：US20150010097A1

公开(公告)日：2015-01-08

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: H04L5/00 ,  H04W88/08 ,  H04B7/04

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 will include numerous traffic symbols and two or more short pilot symbols, which are spaced apart from one another by at least one traffic symbol and will have a Fourier transform length that is less than the Fourier transform length of any given traffic symbol. Multiple transmitters will generate pilot information and modulate the pilot information onto sub-carriers of the short pilot symbols in an orthogonal manner. Each transmitter may use different sub-carriers within the time and frequency domain, which is encompassed by the short pilot symbols within the transmit time interval. Alternatively, each transmitter may uniquely encode the pilot information using a unique code division multiplexed code and modulate the encoded pilot information onto common sub-carriers of the short pilot symbols.

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将包括多个业务符号和两个或更多个短导频符号，它们彼此间隔开至少一个业务符号，并且将具有小于任何给定业务的傅里叶变换长度的傅里叶变换长度 符号。 多个发射机将产生导频信息，并以正交方式将导频信息调制到短导频符号的子载波上。 每个发射机可以在时间和频域内使用不同的子载波，由发射时间间隔内的短导频符号包围。 或者，每个发射机可以使用唯一的码分多路复用码对导频信息进行唯一的编码，并将编码的导频信息调制到短导频符号的公共子载波上。

公开(公告)号：US20150009886A1

公开(公告)日：2015-01-08

申请号：US14494810

申请日：2014-09-24

Applicant: Apple Inc.

Inventor： Hang Zhang ,  Jianglei Ma ,  Ming Jia ,  Mo-Han Fong ,  Peiying Zhu ,  Wen Tong

IPC: H04W72/00 ,  H04L12/18 ,  H04W4/08 ,  H04W48/10

CPC classification number: H04W72/0406 ,  H04B7/0413 ,  H04L1/1887 ,  H04L5/023 ,  H04L12/185 ,  H04L27/2627 ,  H04L61/2069 ,  H04W4/08 ,  H04W48/10 ,  H04W72/005 ,  H04W72/04 ,  H04W74/004 ,  H04W74/006 ,  Y02D30/30

Abstract: A method and system for allocating shareable wireless transmission resources. A resource pool is established. The resource pool is divided into a plurality of physical layer allocation units usable for wirelessly transmitting control information and traffic data. The allocation units are assigned at the media access control layer for the wireless transmission of the control information and traffic data. The system and method of the present invention also allows mobile stations to be dynamically grouped into multicast groupings to reduce system overhead resource requirements.

公开(公告)号：US20140348271A1

公开(公告)日：2014-11-27

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

IPC: H04L27/26 ,  H04L5/00 ,  H04L25/02

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.

Abstract translation: 本发明的方面包括用于将数据和导频符号插入具有时域和频域的正交频分复用（OFDM）帧的方法和装置。 一种方法包括在时间和频率上插入数据和导频符号的二维阵列的第一类型的至少一个区域，并在第二类型的至少一个区域中插入时间和频率的数据和导频符号的二维阵列 。 在一些实现中，第一类型的区域包括可由接收OFDM帧的所有接收机检测的公共导频符号。 在一些实施方式中，第二类型的区域包括专用导频符号，其仅可以被知道用于对专用导频符号进行编码的预处理的接收机检测。

公开(公告)号：US08867649B2

公开(公告)日：2014-10-21

申请号：US14022912

申请日：2013-09-10

Applicant: Apple Inc.

Inventor： Eddy Hum ,  Ming Jia

IPC: H04B7/02 ,  H04L1/02

CPC classification number: H04B7/0456 ,  H04B7/0439

Abstract: A MIMO decoder is configured to obtain a channel matrix and generate a Hermitian transpose of the channel matrix. A product of the Hermitian transpose of the channel matrix and the channel matrix is generated to provide a first product having multiple diagonal elements. A partial matrix inversion of the diagonal elements of the first product is generated to provide a diagonal vector. From the diagonal vector, an antenna layer is selected from the multiple antenna layers and represents the antenna layer selected for a given processing iteration. The selected antenna layer will preferably correspond to that having the lowest inverse channel gain. A partial matrix inversion of the first product along the row corresponding to the selected antenna layer is generated to provide a row vector. A product of the row vector and the Hermitian transpose of the channel matrix is generated to provide an inverse channel gain vector.

Abstract translation: MIMO解码器被配置为获得信道矩阵并且生成信道矩阵的厄米转置。 产生Hermitian转置通道矩阵和通道矩阵的乘积，以提供具有多个对角元素的第一乘积。 产生第一乘积的对角元素的部分矩阵反演以提供对角矢量。 从对角向量中，从多个天线层中选择天线层，并表示为给定的处理迭代而选择的天线层。 所选择的天线层将优选地对应于具有最低反向信道增益的天线层。 产生沿着对应于所选天线层的行的第一乘积的部分矩阵求逆以提供行向量。 产生行向量和信道矩阵的Hermitian转置的乘积以提供反向信道增益向量。

公开(公告)号：US20140064395A1

公开(公告)日：2014-03-06

申请号：US14072779

申请日：2013-11-05

Applicant: Apple Inc.

Inventor： Wen Tong ,  Hosein Nikopourdeilami, IV ,  Amir Keyvam Khandani ,  Hua Xu ,  Ming Jia ,  Peiying Zhu ,  Dong-Sheng Yu

IPC: H04B7/04

CPC classification number: H04B7/0478 ,  H04B7/0417 ,  H04B7/0456 ,  H04B7/0634 ,  H04B7/0639 ,  H04L69/04 ,  H04L69/14

Abstract: A codebook C is provided in a MIMO transmitter as well as a MIMO receiver. The codebook C will include M codewords ci, where i is a unique codeword index for each codeword ci. Each codeword defines weighting factors to apply to the MIMO signals, and may correspond to channel matrices or vectors to apply to the MIMO signals prior to transmission from the respective antennas of the MIMO transmitter. The present invention creates codeword subsets Si for each codeword ci of the codebook C. Each codeword subset Si defines L codewords cj, which are selected from all the codewords ci in the codebook C. The codewords cj in a codeword subset Si are the L codewords in the entire codebook that best correlate with the corresponding codeword ci.

Abstract translation: 码本C被提供在MIMO发射机以及MIMO接收机中。 码本C将包括M个码字ci，其中i是每个码字ci的唯一码字索引。 每个码字定义了应用于MIMO信号的加权因子，并且可以对应于在从MIMO发射机的各个天线发送之前应用于MIMO信号的信道矩阵或向量。 本发明为码本C的每个码字ci创建码字子集Si。每个码字子集Si定义了从码本C中的所有码字ci中选择的L个码字cj。码字子集Si中的码字cj是L个码字 在整个码本中与相应的码字ci最相关。

公开(公告)号：US20140036823A1

公开(公告)日：2014-02-06

申请号：US14040700

申请日：2013-09-29

Applicant: Apple Inc.

Inventor： Jianglei Ma ,  Ming Jia ,  Peiying Zhu ,  Wen Tong

IPC: H04L7/00

CPC classification number: H04W36/08 ,  H04B7/022 ,  H04B7/04 ,  H04B7/0413 ,  H04B7/0667 ,  H04B7/0697 ,  H04J11/0069 ,  H04L5/0023 ,  H04L5/0037 ,  H04L5/0048 ,  H04L7/0008 ,  H04L27/2602 ,  H04L27/2607 ,  H04L27/2613 ,  H04L27/2627 ,  H04L27/2628 ,  H04L27/2663 ,  H04L27/2665 ,  H04L27/2672 ,  H04L27/2675

Abstract: A method and apparatus are provided for performing acquisition, synchronization and cell selection within an MIMO-OFDM communication system. A coarse synchronization is performed to determine a searching window. A fine synchronization is then performed by measuring correlations between subsets of signal samples, whose first signal sample lies within the searching window, and known values. The correlations are performed in the frequency domain of the received signal. In a multiple-output OFDM system, each antenna of the OFDM transmitter has a unique known value. The known value is transmitted as pairs of consecutive pilot symbols, each pair of pilot symbols being transmitted at the same subset of sub-carrier frequencies within the OFDM frame.

Abstract translation: 提供了一种用于在MIMO-OFDM通信系统内执行采集，同步和小区选择的方法和装置。 执行粗同步以确定搜索窗口。 然后通过测量其第一信号样本位于搜索窗口内的信号样本的子集与已知值之间的相关性来执行精细同步。 相关性在接收信号的频域中进行。 在多输出OFDM系统中，OFDM发射机的每个天线具有唯一的已知值。 已知值作为连续导频符号对发送，每对导频符号在OFDM帧内的子载波频率的相同子集上发送。

公开(公告)号：US20140016716A1

公开(公告)日：2014-01-16

申请号：US14022912

申请日：2013-09-10

Applicant: Apple Inc.

Inventor： Eddy Hum ,  Ming Jia

IPC: H04B7/04

CPC classification number: H04B7/0456 ,  H04B7/0439

Abstract: A MIMO decoder is configured to obtain a channel matrix and generate a Hermitian transpose of the channel matrix. A product of the Hermitian transpose of the channel matrix and the channel matrix is generated to provide a first product having multiple diagonal elements. A partial matrix inversion of the diagonal elements of the first product is generated to provide a diagonal vector. From the diagonal vector, an antenna layer is selected from the multiple antenna layers and represents the antenna layer selected for a given processing iteration. The selected antenna layer will preferably correspond to that having the lowest inverse channel gain. A partial matrix inversion of the first product along the row corresponding to the selected antenna layer is generated to provide a row vector. A product of the row vector and the Hermitian transpose of the channel matrix is generated to provide an inverse channel gain vector.

Abstract translation: MIMO解码器被配置为获得信道矩阵并且生成信道矩阵的厄米转置。 产生Hermitian转置通道矩阵和通道矩阵的乘积，以提供具有多个对角元素的第一乘积。 产生第一乘积的对角元素的部分矩阵反演以提供对角矢量。 从对角向量中，从多个天线层中选择天线层，并表示为给定的处理迭代而选择的天线层。 所选择的天线层将优选地对应于具有最低反向信道增益的天线层。 产生沿着对应于所选天线层的行的第一乘积的部分矩阵求逆以提供行向量。 产生行向量和信道矩阵的Hermitian转置的乘积以提供反向信道增益向量。

公开(公告)号：US20130322399A1

公开(公告)日：2013-12-05

申请号：US13673289

申请日：2012-11-09

Applicant: Apple, Inc.

Inventor： Jinanglei Ma ,  Wen Tong ,  Ming Jia ,  Peiying Zhu ,  Mo-Han Fong ,  Hang Zhang

IPC: H04W36/18

CPC classification number: H04W36/18 ,  H04B7/022 ,  H04B7/0691

Abstract: Soft handoff in an OFDMA system is disclosed. If the pilot signal strength for a base station exceeds the defined threshold, the base station is added to an active set list. Subcarriers in a plurality of orthogonal frequency division multiplexing (OFDM) symbols are divided and allocated into subchannels. The OFDM symbols are divided and multiplexed. A soft handoff zone with a first dimension of the subchannels and a second dimension of the divided and multiplexed OFDM symbols is defined. The soft handoff zone has subcarriers with a subchannel definition, for example, an identical permutation.

Abstract translation: 披露了OFDMA系统中的软切换。 如果基站的导频信号强度超过定义的阈值，则将基站添加到活动集列表中。 多个正交频分复用（OFDM）符号中的子载波被划分并分配给子信道。 OFDM符号被分割和多路复用。 定义了具有子信道的第一维度和分割和多路复用的OFDM符号的第二维度的软切换区域。 软切换区具有子信道定义的子载波，例如相同的置换。

公开(公告)号：US20130301513A1

公开(公告)日：2013-11-14

申请号：US13944343

申请日：2013-07-17

Applicant: Apple Inc.

Inventor： Jianglei Ma ,  Aaron Callard ,  Ming Jia ,  Wen Tong ,  Peiying Zhu ,  Hang Zhang

IPC: H04W4/06 ,  H04B7/06

CPC classification number: H04W4/06 ,  H04B7/0413 ,  H04B7/0697 ,  H04L5/0007 ,  H04L5/0048 ,  H04L5/0082 ,  H04W36/0005 ,  H04W36/30 ,  H04W72/005

Abstract: Systems and methods are disclosed herein for an enhanced Multimedia Broadcast Multicast Service (MBMS) in a wireless communications network. In one embodiment, a number of base stations in a MBMS zone, or broadcast region, accommodate both Spatial Multiplexing (SM) enabled user elements and non-SM enabled user elements. In another embodiment, a number of base stations form a MBMS zone, or broadcast region, where the MBMS zone is sub-divided into an SM zone and a non-SM zone. In another embodiment, the wireless communications network includes multiple MBMS zones. For each MBMS zone, base stations serving the MBMS zone transmit an MBMS zone identifier (ID) for the MBMS zone. The MBMS zone ID may be used by a user element for decoding and/or to determine when to perform a handoff from one MBMS zone to another.

Abstract translation: 这里公开了用于无线通信网络中的增强型多媒体广播多播服务（MBMS）的系统和方法。 在一个实施例中，MBMS区域或广播区域中的多个基站适应启用的空间复用（SM）用户元件和不启用SM的用户元件。 在另一个实施例中，多个基站形成MB​​MS区域或广播区域，其中MBMS区域被划分为SM区域和非SM区域。 在另一个实施例中，无线通信网络包括多个MBMS区域。 对于每个MBMS区域，服务于MBMS区域的基站发送MBMS区域的MBMS区域标识符（ID）。 MBMS区域ID可以由用户单元用于解码和/或确定何时执行从一个MBMS区域到另一个MBMS区域的切换。

公开(公告)号：US20200177422A1

公开(公告)日：2020-06-04

申请号：US16780620

申请日：2020-02-03

Applicant: Apple Inc.

Inventor： Jianglei Ma ,  Wen Tong ,  Ming Jia ,  Hua Xu ,  Peiying Zhu ,  Hang Zhang

IPC: H04L27/26 ,  H04L5/00 ,  H04L1/00

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.