知搜-全球专利检索

  1. Login
  2. Sign Up

Search Results

210 records (took 0.045 seconds)

    Pilot Symbol Patterns for Transmission via a Plurality of Antennas
    193.
    发明申请
    Pilot Symbol Patterns for Transmission via a Plurality of Antennas 审中-公开
    通过多个天线传输的先导符号模式

    公开(公告)号：US20160359652A1

    公开(公告)日：2016-12-08

    申请号：US15226101

    申请日：2016-08-02

    Applicant: Apple Inc.

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

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

    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。

    Medium Access Control for Wireless Systems
    197.
    发明申请
    Medium Access Control for Wireless Systems 审中-公开
    无线系统的媒体访问控制

    公开(公告)号：US20150304943A1

    公开(公告)日：2015-10-22

    申请号：US14733656

    申请日：2015-06-08

    Applicant: APPLE INC.

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

    IPC: H04W48/16 ,  H04W24/00 ,  H04W8/26

    CPC classification number: H04W48/16 ,  H04L63/162 ,  H04W8/26 ,  H04W24/00 ,  H04W52/262 ,  H04W74/00

    Abstract: A method for execution by a mobile station (MS) in a mobile communications network, the method comprising: receiving a first MS identifier from the network during a ranging operation involving the MS; using the first MS identifier to extract the contents of at least one message received from the network during said ranging operation; using a second MS identifier, different from the first MS identifier, to extract the contents of at least one message received from the network after said ranging operation is complete. Also, a method for execution by the base station, comprising: outputting a first message destined for the MS, the first message including a first identifier for use by the MS during a ranging operation; determining that said ranging operation is complete; outputting a second message destined for the MS, the second message including a second identifier for use by the MS in subsequent communication with the network.

    Abstract translation: 一种用于由移动通信网络中的移动台（MS）执行的方法，所述方法包括：在涉及所述MS的测距操作期间，从所述网络接收第一MS标识符; 在所述测距操作期间使用第一MS标识符提取从网络接收的至少一个消息的内容; 使用与第一MS标识符不同的第二MS标识符在所述测距操作完成之后提取从网络接收的至少一个消息的内容。 另外，由基站执行的方法，包括：输出目的地为MS的第一消息，所述第一消息包括在测距操作期间由MS使用的第一标识符; 确定所述测距操作完成; 输出目的地为MS的第二消息，所述第二消息包括第二标识符供所述MS在与所述网络的后续通信中使用。

    Channel Quality Feedback for Multi-Carrier Operation of a Mobile Station
    198.
    发明申请
    Channel Quality Feedback for Multi-Carrier Operation of a Mobile Station 审中-公开
    移动台多载波操作的信道质量反馈

    公开(公告)号：US20150288504A1

    公开(公告)日：2015-10-08

    申请号：US14723574

    申请日：2015-05-28

    Applicant: Apple Inc.

    Inventor： Mo-Han Fong ,  Hang Zhang ,  Sophie Vrzic ,  Robert Novak ,  Jun Yuan ,  Dong-Sheng Yu

    IPC: H04L5/00 ,  H04W72/04 ,  H04W72/08

    CPC classification number: H04W72/0406 ,  H04L1/1812 ,  H04L5/0055 ,  H04L5/0057 ,  H04W24/10 ,  H04W48/10 ,  H04W48/12 ,  H04W48/14 ,  H04W72/042 ,  H04W72/0446 ,  H04W72/0453 ,  H04W72/085 ,  H04W88/06

    Abstract: To effectively and efficiently provide control information, a broadcast pointer channel (BPCH) may be used to identify the type and perhaps relative location of control information that is being provided in a given frame structure, such as a sub-frame, frame, or superframe. A sub-frame (or like framing entity, such a frame or superframe) may have a BPCH and a corresponding system control information segment in which control information may reside. The system control information segment may have any number of control information blocks, wherein each control information block that is present may correspond to a particular type of control information. The BPCH is used to identify the type of control information that is present in a corresponding system control information segment, and if needed or desired, the relative locations of the various control information.

    Abstract translation: 为了有效和高效地提供控制信息，可以使用广播指针信道（BPCH）来识别在给定帧结构（例如子帧，帧或超帧）中提供的控制信息的类型和可能的相对位置 。 子帧（或类似的成帧实体，例如帧或超帧）可以具有BPCH和控制信息可以驻留在其中的对应的系统控制信息段。 系统控制信息段可以具有任何数量的控制信息块，其中存在的每个控制信息块可以对应于特定类型的控制信息。 BPCH用于识别存在于对应的系统控制信息段中的控制信息的类型，并且如果需要或期望，则各种控制信息的相对位置。

Patent Agency Ranking