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    Systems and methods for use with orthogonal frequency division multiplexing
    172.
    发明授权
    Systems and methods for use with orthogonal frequency division multiplexing 有权

    公开(公告)号：US10985892B2

    公开(公告)日：2021-04-20

    申请号：US16591711

    申请日：2019-10-03

    Applicant: Apple Inc.

    Inventor： Hang Zhang ,  Mo-Han Fong ,  Peiying Zhu ,  Wen Tong

    IPC: H04L5/00 ,  H04L1/18 ,  H04L9/08 ,  H04L9/30 ,  H04L1/16 ,  H04L27/26 ,  H04W12/00 ,  H04W12/02 ,  H04L1/00 ,  H04L1/06 ,  H04W12/04

    Abstract: Systems and methods are provided for enabling H-ARQ communication between a base station and one or more wireless terminals. Methods for enabling incremental redundancy (IR) based H-ARQ, Chase based H-ARQ and Space-Time Code combining (STC) based H-ARQ between devices for down⋅link and up-link direction transmissions are provided in the form of an information element (IE) for use with a Normal MAP convention as currently accepted in the draft version standard of IEEE 802.16. In addition, embodiments of the invention provide a resource management scheme to protect a network from abuse of resources from a wireless terminal not registered with the network. Components of the down-link and up-link mapping components of a data frame transmitted from the base station to one or more wireless terminals included messages that are readable by all wireless terminals as well as some messages that are encrypted and only readable by wireless terminals that are authenticated as being registered with the network.

    ENVIRONMENTAL AND AGGREGATE ACOUSTIC DOSIMETRY
    173.
    发明申请
    ENVIRONMENTAL AND AGGREGATE ACOUSTIC DOSIMETRY 审中-公开

    公开(公告)号：US20200379718A1

    公开(公告)日：2020-12-03

    申请号：US16872120

    申请日：2020-05-11

    Applicant: Apple Inc.

    Inventor： Jakub Mazur ,  Tyrone T. Chen ,  Hang Zhang

    IPC: G06F3/16 ,  G06F16/61 ,  G01H11/06

    Abstract: A digital signal processing method for ambient sound acoustic dosimetry. Strength of a microphone signal generated by a watch worn by a user is determined and converted into a sound sample having units for sound noise exposure. This is repeated multiple times to produce a time sequence of sound samples that is written to a secure database access to which is authorized by the user. Other aspects are also described and claimed.

    Pilot symbol patterns for transmission through a plurality of antennas
    174.
    发明授权
    Pilot symbol patterns for transmission through a plurality of antennas 有权

    公开(公告)号：US10700905B2

    公开(公告)日：2020-06-30

    申请号：US16666650

    申请日：2019-10-29

    Applicant: Apple Inc.

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

    IPC: H04L27/26 ,  H04W52/32 ,  H04L25/02 ,  H04L5/00 ,  H04B7/08 ,  H04B7/06 ,  H04L1/06 ,  H04L1/00

    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).

    Methods and systems for orthogonal frequency division multiplexing (OFDM) multiple zone partitioning
    178.
    发明授权
    Methods and systems for orthogonal frequency division multiplexing (OFDM) multiple zone partitioning 有权

    公开(公告)号：US10277374B2

    公开(公告)日：2019-04-30

    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

    IPC: H04L5/00 ,  H04W52/32 ,  H04L27/26 ,  H04L25/02 ,  H04L1/00 ,  H04L1/06

    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.

    Methods and Systems for Resource Allocation
    180.
    发明申请
    Methods and Systems for Resource Allocation 审中-公开

    公开(公告)号：US20190044671A1

    公开(公告)日：2019-02-07

    申请号：US16157413

    申请日：2018-10-11

    Applicant: Apple Inc.

    Inventor： Robert Novak ,  Mo-Han Fong ,  Hang Zhang ,  Sophie Vrzic

    IPC: H04L5/00 ,  H04L1/18 ,  H04W72/12 ,  H04W52/48 ,  H04W72/04 ,  H04W52/34

    Abstract: Various methods and systems are provided for allocating time-frequency resources for downlink (DL) and uplink (UL) communications between base stations and mobile stations. Different forms of resource allocation messages including combinations of bitmaps and bitfields provide additional information about the resources and/or how they are assigned. In some implementations the resource allocation messages enable reduced overhead, which may ultimately improve transmission rates and/or the quality of transmissions.

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