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    Adaptive Two-Dimensional Channel Interpolation
    71.
    发明申请
    Adaptive Two-Dimensional Channel Interpolation 有权
    自适应二维通道插值

    公开(公告)号：US20140119471A1

    公开(公告)日：2014-05-01

    申请号：US13944022

    申请日：2013-07-17

    Applicant: Apple Inc.

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

    IPC: H04L27/26

    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。

    Methods and systems for HARQ protocols
    72.
    发明授权
    Methods and systems for HARQ protocols 有权

    公开(公告)号：US11515969B2

    公开(公告)日：2022-11-29

    申请号：US17215623

    申请日：2021-03-29

    Applicant: Apple Inc.

    Inventor： Mo-han Fong ,  Sophie Vrzic ,  Robert Novak ,  Jun Yuan ,  Dong-Sheng Yu

    IPC: H04W72/00 ,  H04L1/18 ,  H04W72/04 ,  H04W72/12 ,  H04L5/14 ,  H04L5/00 ,  H04L1/00 ,  H04L27/26 ,  H04W88/04 ,  H04W88/06 ,  H04W28/04

    Abstract: Methods described herein are for wireless communication systems. One aspect of the invention is directed to a method for a HARQ process, in which the HARQ process includes a first transmission of an encoder packet and at least one retransmission. The method involves allocating a transmission resource for each respective transmission. The method involves transmitting control information from a base station to a mobile station for each respective transmission. The control information includes information to uniquely identify the HARQ process and an identification of one of a time resource, a frequency resource and a time and frequency resource that is allocated for the transmission. In some embodiments of the invention, specific control information is signalled from a base station to a mobile station to enable RAS-HARQ operation. In some embodiments of the invention, retransmission signaling in included as part of regular unicast signaling used for both first transmission and retransmissions. In some embodiments of the invention, a 3-state acknowledgement channel and associated error recovery operation enables the base station and mobile station to recover from control signaling error and reduce packet loss.

    Methods and Systems for HARQ Protocols
    77.
    发明申请
    Methods and Systems for HARQ Protocols 审中-公开

    公开(公告)号：US20180294925A1

    公开(公告)日：2018-10-11

    申请号：US16004740

    申请日：2018-06-11

    Applicant: Apple Inc.

    Inventor： Mo-han Fong ,  Sophie Vrzic ,  Robert Novak ,  Jun Yuan ,  Dong-Sheng Yu

    IPC: H04L1/18 ,  H04L1/00 ,  H04W72/04 ,  H04W72/00 ,  H04W72/12 ,  H04L27/26 ,  H04L5/14 ,  H04L5/00 ,  H04W28/04 ,  H04W88/06 ,  H04W88/04

    Abstract: Methods described herein are for wireless communication systems. One aspect of the invention is directed to a method for a HARQ process, in which the HARQ process includes a first transmission of an encoder packet and at least one retransmission. The method involves allocating a transmission resource for each respective transmission. The method involves transmitting control information from a base station to a mobile station for each respective transmission. The control information includes information to uniquely identify the HARQ process and an identification of one of a time resource, a frequency resource and a time and frequency resource that is allocated for the transmission. In some embodiments of the invention, specific control information is signalled from a base station to a mobile station to enable RAS-HARQ operation. In some embodiments of the invention, retransmission signaling in included as part of regular unicast signaling used for both first transmission and retransmissions. In some embodiments of the invention, a 3-state acknowledgement channel and associated error recovery operation enables the base station and mobile station to recover from control signaling error and reduce packet loss.

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