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    TECHNIQUES AND APPARATUSES FOR TRANSMIT DIVERSITY WHILE MAINTAINING LOW PEAK TO AVERAGE POWER RATIO
    72.
    发明申请
    TECHNIQUES AND APPARATUSES FOR TRANSMIT DIVERSITY WHILE MAINTAINING LOW PEAK TO AVERAGE POWER RATIO 审中-公开

    公开(公告)号：US20180213510A1

    公开(公告)日：2018-07-26

    申请号：US15693197

    申请日：2017-08-31

    Applicant: QUALCOMM Incorporated

    Inventor： Sony AKKARAKARAN ,  Seyong Park ,  Tao Luo ,  Wei Zeng ,  Hao Xu ,  Peter Gaal ,  Yi Huang ,  Renqiu Wang

    IPC: H04W72/04 ,  H04L5/00

    Abstract: Some techniques and apparatuses described herein may assign resource elements of a particular resource block for transmission by two or more different antennas in a fashion such that the symbols are interleaved in frequency and/or in time, which improves frequency diversity of the two or more different antennas, thereby improving uplink performance of the UE. In some aspects, when the two or more resource blocks are contiguous, then each antenna may produce an interleaved frequency division multiple access (IFDMA) waveform, which may maintain peak to average power ratio (PAPR) properties of a single channel FDMA transmission. Thus, some techniques and apparatuses described herein may achieve transmit diversity and/or frequency diversity of a stream of symbols on two or more antennas without significantly increasing the PAPR of the stream of symbols.

    FREQUENCY AND TIME DOMAIN MULTIPLEXING FOR LOW PEAK-TO-AVERAGE POWER RATIO (PAPR) WAVEFORM DESIGN WITH MULTIPLE STREAMS
    73.
    发明申请
    FREQUENCY AND TIME DOMAIN MULTIPLEXING FOR LOW PEAK-TO-AVERAGE POWER RATIO (PAPR) WAVEFORM DESIGN WITH MULTIPLE STREAMS 审中-公开

    公开(公告)号：US20180212810A1

    公开(公告)日：2018-07-26

    申请号：US15674428

    申请日：2017-08-10

    Applicant: QUALCOMM Incorporated

    Inventor： Seyong Park ,  Sony Akkarakaran ,  Wei Zeng ,  Peter Gaal ,  Yi Huang ,  Renqiu Wang ,  Hao Xu ,  Tao Luo ,  Tingfang Ji

    IPC: H04L27/26 ,  H04L5/00

    Abstract: Methods, systems, and devices for wireless communications are described that support frequency and time domain multiplexing for low peak-to-average waveforms with multiple streams. A user equipment (UE) may identify sets of symbols associated with different streams (e.g., multiple single-carrier discrete Fourier transform (DFT)-spread waveforms), where each stream may be associated with a low peak-to-average power ratio (PAPR). In some cases, different waveforms may be mapped to subsets of frequency resources through frequency division multiplexing (FDM). The UE may further reduce the PAPR of the multiplexed waveforms by performing time division multiplexing (TDM) across the single-carrier streams, and sets of symbols that are not used by one waveform may be used by another waveform. Frequency domain phase ramps may be applied to align the multiplexed waveforms. Signals included in an uplink transmission according to these techniques may maintain properties similar to single-carrier waveforms, including a low PAPR.

    FLEXIBLE COMB-BASED REFERENCE SIGNALS
    74.
    发明申请
    FLEXIBLE COMB-BASED REFERENCE SIGNALS 审中-公开

    公开(公告)号：US20180212728A1

    公开(公告)日：2018-07-26

    申请号：US15874712

    申请日：2018-01-18

    Applicant: QUALCOMM Incorporated

    Inventor： Renqiu Wang ,  Yi Huang ,  Hao Xu ,  Wei Zeng ,  Peter Gaal

    IPC: H04L5/00 ,  H04W72/14 ,  H04B7/0413

    Abstract: Multiple-input, multiple-output (MIMO) devices and non-MIMO devices may implement a flexible comb-based design for transmission of reference signals, such as demodulation reference signals (DMRSs). User equipment (UEs) of different ranks may use the flexible comb-based design to transmit the reference signals in a common comb pattern within an allocated bandwidth. UEs using as many antenna ports as combs in the common comb pattern may transmit a different reference signal using a different antenna port over each comb, while UEs using fewer antenna ports than combs may concatenate combs, so that the UEs may transmit a reference signal using a single antenna port over multiple combs. Using the flexible comb-based design, a base station may be capable of better manage inter-cell interference and multiplexing of different rank UEs in shared resource blocks (RBs) may be supported.

    Techniques for extending an OFDM waveform for multiplexing
    76.
    发明授权
    Techniques for extending an OFDM waveform for multiplexing 有权

    公开(公告)号：US09967122B2

    公开(公告)日：2018-05-08

    申请号：US15271825

    申请日：2016-09-21

    Applicant: QUALCOMM Incorporated

    Inventor： Seyong Park ,  Wei Zeng ,  Joseph Binamira Soriaga ,  Tingfang Ji

    IPC: H04L27/26

    CPC classification number: H04L27/2605 ,  H04L27/2602 ,  H04L27/2628 ,  H04L27/2636 ,  H04L27/265

    Abstract: Aspects of the present disclosure provide systems, methods, and apparatuses for implementing the multiplexing of different orthogonal frequency-division multiplexing (OFDM) waveforms using a transmitter and receiver configured to process different types of signals without a need for distinct hardware structures. In one example, aspects of the present disclosure may include a transmitter configured to transmit both a first type of discrete fourier transform (DFT)-spread OFDM waveform and a second type of DFT-spread OFDM waveform that may be multiplexed over the wireless channel. In some aspects, the transmitter may modify the numerology of the zero-tail DFT-spread OFDM waveform to match the numerology of other OFDM waveforms (e.g., OFDM waveform with zero-guard or a single carrier DFT-spread OFDM with zero-guard).

    SIDELINK-CENTRIC SUBFRAME FOR WIRELESS COMMUNICATION
    80.
    发明申请
    SIDELINK-CENTRIC SUBFRAME FOR WIRELESS COMMUNICATION 审中-公开

    公开(公告)号：US20170353971A1

    公开(公告)日：2017-12-07

    申请号：US15368425

    申请日：2016-12-02

    Applicant: QUALCOMM Incorporated

    Inventor： Piyush Gupta ,  Chong Li ,  Joseph Binamira Soriaga ,  Tingfang Ji ,  Shailesh Patil ,  Jing Jiang ,  Wei Zeng ,  Alexei Gorokhov ,  Junyi Li

    IPC: H04W72/14 ,  H04W72/12 ,  H04W76/02

    CPC classification number: H04W72/14 ,  H04W72/12 ,  H04W72/1284 ,  H04W72/1289 ,  H04W74/04 ,  H04W76/14

    Abstract: An apparatus may receive, from a scheduling entity, sidelink grant information in a downlink control channel. After receiving the grant information in the downlink control channel, the apparatus may transmit a request-to-send (RTS) signal comprising an indication of a requested duration of time to reserve a sidelink channel for sidelink data. If the sidelink channel is available for the requested duration of time, the apparatus may receive a clear-to-send (CTS) signal configured to indicate an availability of the sidelink channel for the requested duration of time. Subsequently, the apparatus may communicate, with another apparatus different from the scheduling entity, the sidelink data using the sidelink channel during the requested duration of time. Afterwards, the apparatus may communicate acknowledgment information corresponding to the communication of the sidelink signal with the other apparatus. Various additional and alternative aspects are described herein.

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