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    Reducing channel interference with complex-valued asymmetrical weighted overlap and add filtering
    1.
    发明授权
    Reducing channel interference with complex-valued asymmetrical weighted overlap and add filtering 有权

    公开(公告)号：US12255851B2

    公开(公告)日：2025-03-18

    申请号：US17805493

    申请日：2022-06-06

    Applicant: QUALCOMM Incorporated

    Inventor： Peter Zillmann ,  Andrea Garavaglia ,  Andreas Maximilian Schenk ,  Pierpaolo Vallese ,  Saeed Afrasiabi Gorgani

    IPC: H04L5/00

    Abstract: Waveforms for wireless communication are shaped asymmetrically according to a complex-valued weighted overlap/add (WOLA) filter. A wireless communication device generates a waveform corresponding to a carrier. The device determines whether neighboring carriers are being used for wireless communication. If one neighboring carrier is occupied and the other is unoccupied, the wireless communication device applies the asymmetrical filter to the waveform such that out-of-band signals which may interfere with the occupied carrier are suppressed to a greater extent than out-of-band signals potentially present in or around the unoccupied carrier. The wireless communication device then transmits the asymmetrically shaped waveform to maximize interference reduction and signal quality.

    TECHNIQUES FOR PRE-OPENING NOTCH FILTER IN WIRELESS COMMUNICATIONS SYSTEM
    2.
    发明申请
    TECHNIQUES FOR PRE-OPENING NOTCH FILTER IN WIRELESS COMMUNICATIONS SYSTEM 有权

    公开(公告)号：US20220361101A1

    公开(公告)日：2022-11-10

    申请号：US17308524

    申请日：2021-05-05

    Applicant: QUALCOMM Incorporated

    Inventor： Igor Gutman ,  Christian Pietsch ,  Oren Matsrafi ,  Ronen Greenberger ,  Yossi Waldman ,  Jong Hyeon Park ,  Yuval Neeman ,  Peter Zillmann

    IPC: H04W52/02 ,  H04W72/04 ,  H04W72/08

    Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive, from a base station, one or more downlink grants scheduling one or more corresponding downlink transmissions from the base station to the UE. In some examples, the UE may enter a state of sleep prior to receiving the one or more downlink transmissions. In such examples, the UE may wake up from the state of sleep at a first time that is at least a threshold period of time before a second time corresponding to a beginning of the one or more downlink transmissions. After waking up from the state of sleep, the UE may activate a notch filter and use the activated notch filter to filter a spur generated at the UE. The UE may receive the one or more downlink transmissions with improved reliability based on activating the notch filter.

    Dynamic-range reduction of complex-valued baseband signals
    4.
    发明授权
    Dynamic-range reduction of complex-valued baseband signals 有权
    复值基带信号的动态范围减小

    公开(公告)号：US09172574B1

    公开(公告)日：2015-10-27

    申请号：US14329563

    申请日：2014-07-11

    Applicant: QUALCOMM Incorporated

    Inventor： Peter Zillmann ,  Christoph Arnold Joetten ,  Christian Pietsch

    IPC: H04K1/02 ,  H04L27/26 ,  H04L27/36

    CPC classification number: H04L27/2623 ,  H04L27/3411

    Abstract: To reduce the peak-to-average power ratio (PAPR) of a complex-valued digital baseband signal, the signal is mixed to an intermediate frequency and its real components extracted, to generate an intermediate-frequency real-valued digital signal. The intermediate frequency is one-quarter of a sampling rate of the complex-valued digital baseband signal. The intermediate-frequency real-valued digital signal is clipped and down-converted by one-quarter of the sampling rate.

    Abstract translation: 为了降低复值数字基带信号的峰均功率比（PAPR），将信号混合到中频并提取其实部分量，以产生中频实数数字信号。 中频是复值数字基带信号采样率的四分之一。 中频实数数字信号被削波和下变频采样率的四分之一。

    REDUCED POWER MODE FOR A WIRELESS RECEIVER
    7.
    发明申请
    REDUCED POWER MODE FOR A WIRELESS RECEIVER 有权

    公开(公告)号：US20210211981A1

    公开(公告)日：2021-07-08

    申请号：US16737896

    申请日：2020-01-08

    Applicant: QUALCOMM Incorporated

    Inventor： Ronen Greenberger ,  Igor Gutman ,  Oren Matsrafi ,  Yossi Waldman ,  Gideon Shlomo Kutz ,  Christian Pietsch ,  Shay Landis ,  Peter Zillmann ,  Assaf Touboul ,  Yuval Neeman

    IPC: H04W52/02 ,  H04W72/04

    Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may identify conditions associated with one or more physical channels, for example, a set of resources with which the UE may be configured to communicate with a base station. The UE may determine whether to enable a reduced power mode based on the conditions satisfying certain criteria, for example, the set of resources corresponding allocated for particular transmissions. The UE may identify that the conditions satisfy corresponding criteria, and the UE may determine to enable the reduced power mode. The UE may accordingly modify operations one or more components of a receive chain of the UE. The UE may determine to disable the reduced power mode based on the conditions failing to satisfy the criteria, and the UE may modify operations of the one or more components of the receive chain accordingly.

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