公开(公告)号：US10893520B2

公开(公告)日：2021-01-12

申请号：US15244653

申请日：2016-08-23

Applicant: QUALCOMM Incorporated

Inventor： Alberto Rico Alvarino ,  Wanshi Chen ,  Seyed Ali Akbar Fakoorian ,  Peter Gaal ,  Shimman Arvind Patel ,  Madhavan Srinivasan Vajapeyam ,  Renqiu Wang ,  Jing Lei ,  Hao Xu

IPC: H04W72/04 ,  H04W72/00 ,  H04L5/00 ,  H04B7/0456

Abstract: Various techniques for narrowband communications in a wireless communications network are provided. Narrowband communications may be transmitted using a single resource block (RB) of a number of RBs used for wideband communications. In order to provide for efficient device discovery and synchronization using narrowband communications, a synchronization signal, such as a primary synchronization signal (PSS) or secondary synchronization signal (SSS), may be transmitted within the single resource block. The synchronization signal may be transmitted, for example, using multiple orthogonal frequency division multiplexing (OFDM) symbols within the single RB. A common reference signal (CRS) may also be present in the single resource block, which may puncture the synchronization signal, in some examples. In other examples, the synchronization signal may be mapped to non-CRS symbols of the single resource block.

公开(公告)号：US10863334B2

公开(公告)日：2020-12-08

申请号：US16180845

申请日：2018-11-05

Applicant: QUALCOMM Incorporated

Inventor： Renqiu Wang ,  Seyong Park ,  Alberto Rico Alvarino ,  Tingfang Ji ,  Joseph Binamira Soriaga

IPC: H04W4/20 ,  H04W4/70 ,  H04L27/26 ,  H04L5/00 ,  H04J99/00 ,  H04L27/20

Abstract: Repeated signals for narrowband internet of things (NB-IoT) and machine type communication (MTC) may be transmitted using various non-orthogonal multiple access (NOMA) techniques. A user equipment (UE) may generate a set of modulated symbols associated with the data stream, spread the set of symbols using a spreading factor, and may subsequently apply a scrambling sequence to the set of symbols. The spread and scrambled symbols may be transmitted as a time domain waveform that includes one or more repetitions of a transmission time interval (TTI) or a resource unit (RU). Additionally, or alternatively, the UE may perform rate matching and apply the scrambling sequence to achieve the repetitions of the TTIs or RUs. In some cases, the UE may transmit a set of orthogonal pilot signals with the repetitions of the TTIs or RUs, where the pilot signals include different cyclically shifted versions of a base pilot signal.

公开(公告)号：US10826741B2

公开(公告)日：2020-11-03

申请号：US16552943

申请日：2019-08-27

Applicant: QUALCOMM Incorporated

Inventor： Seyong Park ,  Peter Gaal ,  Yi Huang ,  Renqiu Wang ,  Hao Xu ,  Tao Luo

IPC: H04L25/03 ,  H04L27/26 ,  H04B7/06 ,  H04J11/00

Abstract: Adjacent channel leakage-power ratio (ACLR) can be reduced at a transmitter of a device. A modulated signal can be mapped into a plurality of tone sets in a frequency domain, wherein the plurality of tone sets include a first, a second, and a third set of tones. The first and the third set of tones can be converted in the frequency domain to a fourth and a fifth set of tones, respectively, in a time domain. A zero padding of one or more symbols associated with the fourth and the fifth set of tones can be performed to output a sixth and a seventh set of tones, respectively. The sixth and the seventh set of tones can be converted to an eighth and a ninth set of tones, respectively, in the frequency domain. The eighth and the ninth set of tones can be processed for transmitting to another wireless device.

公开(公告)号：US10784934B2

公开(公告)日：2020-09-22

申请号：US16476408

申请日：2018-02-05

Applicant: Qualcomm Incorporated

Inventor： Se Yong Park ,  Wei Zeng ,  Alexandros Manolakos ,  Sony Akkarakaran ,  Yi Huang ,  Renqiu Wang ,  Hao Xu ,  Yu Zhang ,  Joseph Binamira Soriaga ,  Tingfang Ji ,  Peter Gaal

IPC: H04B7/0456 ,  H04L5/00 ,  H04L27/26

Abstract: Methods, systems, and devices for wireless communication are described that support a low peak-to-average power ratio (PAPR) precoded reference signal design for multiple-input, multiple-output (MIMO) transmissions. A user equipment (UE) may identify multiple sets of symbols associated with different reference signal waveforms, where each reference signal waveform may be associated with a low PAPR. In some cases, different single-carrier reference signal waveforms may be mapped to subsets of frequency resources through frequency division multiplexing (FDM) for a transmission on a single antenna. However, the addition of single-carrier waveforms through FDM for a transmission via an antenna may result in an uplink transmission having a high PAPR (e.g., as compared to single-carrier waveforms). The UE may reduce the PAPR of the uplink transmission by multiplexing the reference signal waveforms in the time domain (e.g., using time division multiplexing (TDM)).

公开(公告)号：US10771105B2

公开(公告)日：2020-09-08

申请号：US16280879

申请日：2019-02-20

Applicant: QUALCOMM Incorporated

Inventor： Seyong Park ,  Peter Gaal ,  Wanshi Chen ,  Jing Lei ,  Jay Kumar Sundararajan ,  Renqiu Wang ,  Joseph Binamira Soriaga ,  Naga Bhushan ,  Tingfang Ji ,  John Edward Smee

IPC: H04B1/709 ,  H04B1/7093 ,  H04J13/00 ,  G06F17/14 ,  H04W72/04 ,  H04J13/16 ,  H04B1/69 ,  H04J11/00

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a network controller may determine a first set of spreading sequences and a second set of spreading sequences for non-orthogonal multiple access (NOMA) communication, wherein the first set of spreading sequences is different than the second set of spreading sequences; and configure a first cell to use the first set of spreading sequences and a second cell to use the second set of spreading sequences; or configure the first set of spreading sequences to be used for first user equipment associated with a cell center of the first cell and the second set of spreading sequences to be used for second user equipment associated with a cell edge of the first cell or the second cell. Numerous other aspects are provided.

公开(公告)号：US10743296B2

公开(公告)日：2020-08-11

申请号：US15792375

申请日：2017-10-24

Applicant: QUALCOMM Incorporated

Inventor： Yi Huang ,  Renqiu Wang ,  Hao Xu ,  Wanshi Chen

IPC: H04W72/04 ,  H04L5/00

Abstract: A new design for an uplink control channel is provided. A User Equipment (UE) determines, based on a tone mapping pattern from a plurality of tone mapping patterns for an uplink control channel, resources for transmitting the uplink control channel, and transmits the uplink control channel using the determined resources. A Base Station (BS) determines a tone mapping pattern from a plurality of tone mapping patterns for an uplink control channel, and transmits information regarding the determined tone mapping pattern to at least one UE. The BS receives the uplink control channel based on the tone mapping pattern.

公开(公告)号：US10742372B2

公开(公告)日：2020-08-11

申请号：US16373113

申请日：2019-04-02

Applicant: QUALCOMM Incorporated

Inventor： Seyong Park ,  Jing Lei ,  Joseph Binamira Soriaga ,  Renqiu Wang ,  Naga Bhushan ,  Tingfang Ji

IPC: H04L5/00 ,  H04B1/7103

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may determine that a resource spread multiple access scheme is enabled, wherein the bit and/or symbol level resource spreading happens in time and/or frequency domain through bits or symbol level repetition and spreading. Furthermore, the UE may process bits of codewords and modulated symbols using a set of spreading sequences and a set of scrambling sequences. The UE may transmit the modulated symbols with a discrete-Fourier-transform (DFT)-spread (DFT-s) waveform based at least in part on processing the modulated symbols using the set of spreading sequences and the set of scrambling sequences. Numerous other aspects are provided.

公开(公告)号：US10742283B2

公开(公告)日：2020-08-11

申请号：US16046840

申请日：2018-07-26

Applicant: QUALCOMM Incorporated

Inventor： Seyong Park ,  Yi Huang ,  Renqiu Wang ,  Peter Gaal ,  Wanshi Chen ,  Tao Luo

IPC: H04B7/06 ,  H04B7/0404 ,  H04L5/00 ,  H04W72/04

Abstract: Transmit diversity schemes may be used for sending sequence-based signals over multiple antennas. For example, a user equipment (UE) may determine an uplink sequence to be transmitted to a base station using multiple antennas. The UE may utilize a transmit diversity scheme for the multiple-antenna transmission of the uplink sequence, where the transmit diversity scheme utilized may be based on a number of symbol periods during which the sequence is transmitted. In accordance with the transmit diversity scheme, the UE may use multiple transmit antennas to transmit different sequences from respective antennas. In other examples, the UE may transmit the uplink sequence using different time or frequency resources. Additionally, the UE may use some combination of different transmit diversity schemes for sequence-based signals. In some aspects, the base station may provide an indication of the transmit diversity scheme that the UE is to use for transmitting the uplink sequence.

公开(公告)号：US10735156B2

公开(公告)日：2020-08-04

申请号：US15467459

申请日：2017-03-23

Applicant: QUALCOMM Incorporated

Inventor： Wanshi Chen ,  Peter Gaal ,  Renqiu Wang

IPC: H04L5/00 ,  H04L5/14 ,  H04W72/04 ,  H04W74/08

Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may indicate to a base station the number of uplink (UL) component carriers (CCs) that the UE is capable of supporting. A base station may configure the UE for carrier aggregation (CA) and for one or more auxiliary UL CCs. The CA configuration may include CCs for UL data transmissions and the auxiliary UL configuration may include CCs for UL reference signals or random access channel transmissions. The auxiliary UL CCs may thus be used for sounding reference signal (SRS) transmissions even if the UE is otherwise not configured for UL data transmissions on those CCs. UL data transmissions on the CA carriers may be sent at the same time as SRS transmissions or during different transmission time intervals (TTIs), depending on UE capability.

公开(公告)号：US10716084B2

公开(公告)日：2020-07-14

申请号：US15493247

申请日：2017-04-21

Applicant: QUALCOMM Incorporated

Inventor： Renqiu Wang ,  Hao Xu ,  Wanshi Chen ,  Xiao Feng Wang ,  Peter Gaal ,  Alberto Rico Alvarino ,  Juan Montojo ,  Jing Lei ,  Seyed Ali Akbar Fakoorian

IPC: H04W24/00 ,  H04W64/00 ,  G01S5/02 ,  H04L5/00

Abstract: Certain aspects of the present disclosure generally relate to downlink (DL) based and uplink (UL) based positioning reference signal (PRS) techniques that may help facilitate positioning procedures in systems deploying narrowband devices, such as narrowband Internet of Things (NB-IoT) devices. An exemplary method that may be performed by a node includes monitoring for positioning reference signals (PRS) transmitted from one or more base stations within a narrowband region of a wider system bandwidth, wherein tones of the PRS are repeated across at least one of multiple symbols within a same subframe, or multiple consecutive subframes, and estimating timing from the one or more base stations based on the PRS.