Doppler Shift Estimate Reporting with Pre-Compensation

    公开(公告)号:US20240214034A1

    公开(公告)日:2024-06-27

    申请号:US18602311

    申请日:2024-03-12

    Applicant: Apple Inc.

    CPC classification number: H04B7/01 H04B17/364

    Abstract: A first cellular base station transmits a configuration message to a reporting device installed on a high-speed vehicle. The configuration message specifies one or more parameters of a Doppler measurement report. The reporting device performs one or more first Doppler measurements on the first base station and/or one or more second Doppler measurements on a second base station. The reporting device transmits the Doppler measurement report to the first and/or second base stations. The Doppler measurement report may be used by the first and/or second base stations to perform Doppler pre-compensation on transmissions to the reporting device.

    Radio coverage limit enhanced channel estimation

    公开(公告)号:US12021664B2

    公开(公告)日:2024-06-25

    申请号:US17593824

    申请日:2020-09-24

    Applicant: Apple Inc.

    CPC classification number: H04L25/0228 H04L5/0051

    Abstract: Various techniques are presented to improve channel estimation in a wireless system, comprising: receiving, by a wireless device, an indication of a physical downlink channel configuration for receiving a physical downlink channel transmission, the physical downlink channel transmission including a demodulation reference signal (DMRS); transmitting an indication that the wireless device supports bundling DMRS signals across multiple slots; receiving a DMRS configuration, the DMRS configuration including a channel estimation bundle window, the channel estimation bundle window indicating that channel estimation may be performed across multiple slots; receiving a set of DMRS signals within the channel estimation bundle window, wherein a first DMRS signal of the set of DMRS signals is received in a first slot, and wherein a second DMRS signal of the set of DMRS signals is received in a second slot; and estimating a radio channel based on the first DMRS signal and the second DMRS signal.

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