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公开(公告)号：US08995402B2
公开(公告)日：2015-03-31
申请号：US13855296
申请日：2013-04-02
Applicant: Apple Inc.
Inventor： Jianglei Ma , Ming Jia , Wen Tong , Peiying Zhu , Claude Royer
CPC classification number: H04L27/261 , H04B7/06 , H04B7/0615 , H04B7/0684 , H04L5/0026 , H04L5/0048 , H04L25/0204 , H04L25/0226 , H04L25/0234
Abstract: Pilot, preamble and midamble patterns are provided that are particularly suited for four transmit antenna OFDM systems. Pilots are inserted in a scattered manner for each of the four antennas, either uncoded, space-time coded in pairs, space-time frequency coded in pairs, or space-time-frequency coded.
Abstract translation: 提供了特别适用于四个发射天线OFDM系统的导频，前导码和中置码模式。 飞行员以四个天线中的每一个以分散的方式插入，无论是未编码，成对空时编码，成对进行时空频率编码，还是进行时空编码。
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公开(公告)号：US08976734B2
公开(公告)日：2015-03-10
申请号：US13966589
申请日：2013-08-14
Applicant: Apple Inc.
Inventor： Wen Tong , Leo L. Strawczynski , Shalini S. Periyalwar , Claude Royer
CPC classification number: H04W72/0406 , H04L1/0002 , H04L1/0066 , H04L1/1816 , H04L1/1819 , H04L1/1845 , H04L5/0055 , H04W28/04 , Y02D50/10
Abstract: A system and method for transmitting high speed data on fixed rate and for variable rate channels. The system and method provides the flexibility of adjusting the data rate, the coding rate, and the nature of individual retransmissions. Further, the system and method supports partial soft combining of retransmitted data with previously transmitted data, supports parity bit selection for successive retransmissions, and supports various combinations of data rate variations, coding rate variations, and partial data transmissions.
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133.发明申请公开(公告)号：US20150009943A1
公开(公告)日：2015-01-08
申请号：US14494659
申请日：2014-09-24
Applicant: Apple Inc.
Inventor： Hang Zhang , Jianglei Ma , Ming Jia , Mo-Han Fong , Peiying Zhu , Wen Tong
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.
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134.发明申请Method and System for Allocating Media Access Control Layer Resources in a Wireless Communication Environment 审中-公开在无线通信环境中分配媒体访问控制层资源的方法和系统公开(公告)号：US20150009885A1
公开(公告)日：2015-01-08
申请号：US14494695
申请日：2014-09-24
Applicant: Apple Inc.
Inventor： Hang Zhang , Jianglei Ma , Ming Jia , Mo-Han Fong , Peiying Zhu , Wen Tong
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.
Abstract translation: 一种用于分配可共享无线传输资源的方法和系统。 建立资源池。 资源池被划分为可用于无线发送控制信息和业务数据的多个物理层分配单元。 分配单元被分配在媒体接入控制层，用于无线传输控制信息和业务数据。 本发明的系统和方法还允许移动台被动态分组成多播分组以减少系统开销资源需求。
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公开(公告)号：US08897384B2
公开(公告)日：2014-11-25
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
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。
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Patent Agency Ranking
公开(公告)号：US08837631B2
公开(公告)日：2014-09-16
申请号：US14088531
申请日：2013-11-25
Applicant: Apple Inc.
Inventor： Jianglei Ma , Ming Jia , Hua Xu , Wen Tong , Peiying Zhu , Dong-Sheng Yu , Hang Zhang
IPC: H04L27/00
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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公开(公告)号：US20140219240A1
公开(公告)日：2014-08-07
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.
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公开(公告)号：US20140211726A1
公开(公告)日：2014-07-31
申请号：US14231579
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.
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公开(公告)号：US20140072076A1
公开(公告)日：2014-03-13
申请号：US14077511
申请日：2013-11-12
Applicant: Apple Inc.
Inventor： Mahmoud Taherzadehboroujeni , Hossein Nikopourdeilami , Amir Khandani , Wen Tong , Ming Jia , Peiying Zhu , Dong-Sheng Yu , Jianglei Ma
IPC: H04B7/06
CPC classification number: H04B7/0669 , H04B7/0413 , H04B7/06 , H04B7/0697 , H04B7/0891 , H04L1/0606 , H04L1/0625 , H04L1/0643 , H04L1/0668 , H04L5/0007 , H04L5/0023 , H04L5/0028 , H04L27/2626
Abstract: Methods and devices are provided for MIMO OFDM transmitter and receivers having odd and/even numbers of transmit antennas. Various methods for pre-coding information bits before space time coding (STC) are described for enabling transmission of information bits over all antennas. Methods of decoding received signals that have been pre-coded and STC coded are also provided by embodiments of the invention. Pilot patterns for downlink and uplink transmission between a base station and one or more wireless terminals for three transmit antenna transmitters are also provided. Variable rate codes are provided that combine various fixed rate codes in a manner that results in codes whose rates are dependent on all the various fixed rate codes that are combined
Abstract translation: 为具有奇数和偶数个发射天线的MIMO OFDM发射机和接收机提供了方法和设备。 描述了用于在空间时间编码（STC）之前预编码信息比特的各种方法，以使得能够在所有天线上传输信息比特。 对已经被预编码和STC编码的接收信号进行解码的方法也由本发明的实施例提供。 还提供了用于三个发射天线发射机的基站与一个或多个无线终端之间的下行链路和上行链路传输的导频模式。 提供了可变速率代码，其以使得其速率取决于组合的所有各种固定速率代码的代码的方式组合各种固定速率代码
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公开(公告)号：US20140064243A1
公开(公告)日：2014-03-06
申请号：US14079131
申请日：2013-11-13
Applicant: Apple Inc.
Inventor： Jianglei Ma , Ming Jia , Wen Tong , Peiying Zhu , Hua Zhu , 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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