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61.发明申请公开(公告)号：US20180069676A1
公开(公告)日：2018-03-08
申请号：US15806923
申请日：2017-11-08
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：US20180062894A1
公开(公告)日：2018-03-01
申请号：US15790678
申请日：2017-10-23
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：US09866285B2
公开(公告)日：2018-01-09
申请号：US14865172
申请日：2015-09-25
Applicant: Apple Inc.
Inventor： Jianglei Ma , Ming Jia , Peiying Zhu , Wen Tong
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.
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公开(公告)号：US09832063B2
公开(公告)日：2017-11-28
申请号：US13680173
申请日：2012-11-19
Applicant: Apple Inc.
Inventor： Jianglei Ma , Hang Zhang , Wen Tong , Ming Jia , Peiying Zhu , Mo-Han Fong
CPC classification number: H04L27/2692 , H04B7/02 , H04B7/0452 , H04L5/0007 , H04L5/0023 , H04L5/0048 , H04L7/043 , H04L27/2613 , H04L27/265 , H04L27/2655 , H04L27/2686 , H04W24/02
Abstract: The present invention provides a preamble that is inserted into an OFDMA frame and has a common sequence for all the base stations participating in a transmission. The subscriber station performs fine synchronization using the common sequence on the common preamble, and the resulting peaks will provide the locations of candidate base stations. The base station specific search is then performed in the vicinities of those peaks by using base station specific pseudo-noise sequences. With this two stage cell search, the searching window is drastically reduced. The preamble is matched to known values by a respective receiver to decode the signals and permit multiple signals to be transferred from the transmitter to the receiver. The preamble may comprise two parts, Preamble-1 and Preamble-2, which may be used in different systems, including multioutput, multi-input (MIMO) systems.
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65.发明申请公开(公告)号：US20170135006A1
公开(公告)日：2017-05-11
申请号：US15355440
申请日：2016-11-18
Applicant: Apple Inc.
Inventor： Jianglei Ma , Ming Jia , Peiying Zhu , Wen Tong
IPC: H04W36/08 , H04L27/26 , H04B7/0413
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.
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Patent Agency Ranking
公开(公告)号：US20170126301A1
公开(公告)日：2017-05-04
申请号：US15357552
申请日：2016-11-21
Applicant: APPLE INC.
Inventor： Mahmoud Taherzadehboroujeni , Hosein Nikopour , Amir Khandani , Wen Tong , Ming Jia , Peiying Zhu , Dong-Sheng Yu , Jianglei Ma
IPC: H04B7/06 , H04B7/0413
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
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67.发明授权公开(公告)号：US09621390B2
公开(公告)日：2017-04-11
申请号：US15143712
申请日：2016-05-02
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：US09450663B2
公开(公告)日：2016-09-20
申请号：US14746972
申请日：2015-06-23
Applicant: Apple Inc.
Inventor： Hua Xu , Jianglei Ma , Ming Jia
IPC: H04B7/02 , H04B7/06 , H04L1/00 , H04L1/06 , H04L1/16 , H04L1/18 , H04W52/42 , H04L5/00 , H04W72/12
CPC classification number: H04B7/0669 , H04L1/0073 , H04L1/0668 , H04L1/1607 , H04L1/1861 , H04L5/0055 , H04W52/42 , H04W72/1263 , H04W72/1278
Abstract: In accordance with embodiments, a communication system includes a first device and a second device in communication with the first device. The second device has at least a first pair and a second pair of antennas. The second device spreads a communication bit by a predetermined spreading factor and forms a first set of spatial block codes in frequency domain based on the spread communication bit. The first set of spatial block codes being consecutively transmitted on one of the first and second pairs of antennas.
Abstract translation: 根据实施例，通信系统包括与第一设备通信的第一设备和第二设备。 第二装置具有至少第一对和第二对天线。 第二设备以预定的扩展因子扩展通信位，并且基于扩展通信位在频域中形成第一组空间块码。 第一组空间块码在第一和第二对天线之一上连续发射。
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公开(公告)号：US20160226567A1
公开(公告)日：2016-08-04
申请号：US15093924
申请日：2016-04-08
Applicant: Apple Inc.
Inventor： Ming Jia , Jianglei Ma , Peiying Zhu , Wen Tong
CPC classification number: H04B7/0456 , H04B7/0417 , H04B7/0465 , H04B7/063 , H04L25/03343
Abstract: A high-order Multiple-Input-Multiple-Output (MIMO) transmitter implementing a covariance-based precoding scheme that exploits transmit channel correlation and a method of operation thereof are provided. In one embodiment, covariance-based precoding is performed at the high-order MIMO transmitter based on feedback from a remote high-order MIMO receiver regarding a covariance-based precoding matrix. The covariance-based precoding matrix is, or is derived from, a transmit channel correlation matrix determined by the high-order MIMO receiver for the high-order MIMO transmitter. The covariance-based precoding provides a beam-forming effect when there is a relatively high degree of transmit channel correlation, thereby improving performance of the high-order MIMO transmitter. Further, because changes in the transmit channel correlation occur relatively slowly over time, feedback overhead requirements are substantially reduced as compared to that required for traditional MIMO precoding schemes.
Abstract translation: 提供了实现利用发射信道相关的协方差预编码方案的高阶多输入多输出（MIMO）发射机及其操作方法。 在一个实施例中，基于基于协方差的预编码矩阵的来自远程高阶MIMO接收机的反馈在高阶MIMO发射机处执行基于协方差的预编码。 基于协方差的预编码矩阵是由或由高阶MIMO发射机的高阶MIMO接收机确定的发射信道相关矩阵导出的。 当存在相对较高程度的发射信道相关性时，基于协方差的预编码提供波束形成效应，从而提高高阶MIMO发射机的性能。 此外，由于与传统MIMO预编码方案相比，发射信道相关性的变化随时间发生相对较慢，所以反馈开销要求显着降低。
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公开(公告)号：US09277569B2
公开(公告)日：2016-03-01
申请号：US14618558
申请日：2015-02-10
Applicant: Apple Inc.
Inventor： Sophie Vrzic , Jun Yuan , Mo-Han Fong , Robert Novak , Dong-Sheng Yu , Jianglei Ma
CPC classification number: H04W72/0446 , H04J11/00 , H04L5/005 , H04L5/0053 , H04L5/0055 , H04L27/2602 , H04W72/0413 , H04W72/042 , H04W74/004 , H04W74/0833 , H04W74/0866 , H04W84/12 , H04W88/085 , H04W88/12
Abstract: A method and system are provided having an uplink control structure for providing channel estimation and data demodulation in a wireless communication network. The uplink control structures enable mobile terminals to communicate with corresponding base stations to perform various functions including obtaining initial system access, submitting a bandwidth request, triggering a continuation of negotiated service, or providing a proposed allocation re-configuration header. A dedicated random access channel is provided to communicatively couple the base station and the mobile terminal so that the mobile terminal can select a random access signaling identification. A resource request is received at the base station to uplink resource information from the mobile terminal and an initial access information request is received from the mobile terminal to configure the base station connection.
Abstract translation: 提供一种具有用于在无线通信网络中提供信道估计和数据解调的上行链路控制结构的方法和系统。 上行链路控制结构使得移动终端能够与相应的基站进行通信，以执行各种功能，包括获得初始系统访问，提交带宽请求，触发协商服务的继续或提供建议的分配重配置报头。 提供专用随机接入信道以通信地耦合基站和移动终端，使得移动终端可以选择随机接入信令标识。 在基站接收资源请求以从移动终端上行资源信息，并且从移动终端接收初始访问信息请求以配置基站连接。
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