公开(公告)号：US20190260417A1

公开(公告)日：2019-08-22

申请号：US16279953

申请日：2019-02-19

Applicant: QUALCOMM Incorporated

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

IPC: H04B1/7093 ,  H04J13/00 ,  H04B7/08 ,  H04B7/06

Abstract: Methods, systems, and devices for wireless communications are described that support pairwise cross correlation sequences for non-orthogonal multiple access wireless communications. A user equipment (UE) may receive, from a base station, an indication of a spreading factor and a number of transmitters in a group of non-orthogonal multiple access (NOMA) transmitters configured for concurrent transmissions. The UE may determine, based on the spreading factor and the number of transmitters, a first spreading sequence of a set of spreading sequences from a first codebook, the first spreading sequence having a defined value for pairwise cross correlation with each spreading sequence of the plurality of spreading sequences. The first UE may identify data to be transmitted in an uplink transmission, apply the first spreading sequence to the data to be transmitted in the uplink transmission, and transmit the uplink transmission to the base station.

公开(公告)号：US10382233B2

公开(公告)日：2019-08-13

申请号：US15395814

申请日：2016-12-30

Applicant: QUALCOMM Incorporated

Inventor： Muhammad Sayed Khairy Abdelghaffar ,  Jing Jiang ,  Seyong Park ,  Wei Zeng ,  Joseph Binamira Soriaga ,  Tingfang Ji

IPC: H04L25/03 ,  H04L27/26 ,  H04B7/26

Abstract: Techniques for processing of symbols (e.g., orthogonal frequency division multiplexing (OFDM) or single carrier-frequency division multiple access (SC-FDMA) symbols) provide enhanced out-of-band (OOB) suppression of the symbols and also provide reduced inter-symbol interference (ISI) between a symbol and a subsequent symbol. Multiple frequency tones of a symbol may be divided into two or more subsets of tones. For example, subsets of tones associated with a head portion or a tail portion of an OFDM symbol may be processed with a relatively long weighted overlap-add (WOLA) weighting length or filtering length, and a subset of tones associated with a center portion of the OFDM symbol may be processed with a relatively short WOLA weighting length or filtering length. Such heterogeneous processing of tones within a symbol may provide enhanced inter-channel interference (ICI) and improved OOB suppression and also provide reduced ISI for the center tones of the symbol.

公开(公告)号：US20190207723A1

公开(公告)日：2019-07-04

申请号：US16238268

申请日：2019-01-02

Applicant: QUALCOMM Incorporated

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

IPC: H04L5/00 ,  H04L27/06 ,  H04J13/00 ,  H04W76/28 ,  H04W76/27 ,  H04L27/26

Abstract: Methods, systems, and devices for wireless communications are described that provide a number of groups of transmitters, each group of transmitters having at least one user equipment (UE), and each group of transmitters having an associated transmission opportunity (TXO) for transmission of a reference signal. A number of UEs may transmit transmissions to a base station according to non-orthogonal multiple access (NOMA) techniques in which two or more UEs concurrently transmit to the base station. Depending upon a number of UEs, a number of groups of transmitters, an overloading factor of NOMA transmissions, a system bandwidth, a time span of the reference signal TXO, or any combination thereof, a binary or non-binary orthogonal cover code (OCC) may be applied to transmitted reference signals, which the base station may use to identify reference signals from particular UEs.

公开(公告)号：US20190141499A1

公开(公告)日：2019-05-09

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

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：US20190123788A1

公开(公告)日：2019-04-25

申请号：US16164731

申请日：2018-10-18

Applicant: QUALCOMM Incorporated

Inventor： Seyong Park ,  Joseph Binamira Soriaga ,  Jay Kumar Sundararajan ,  Tingfang Ji ,  Naga Bhushan

IPC: H04B7/0413 ,  H04L5/00 ,  H04W72/04 ,  H04W52/26 ,  H04B7/0426

Abstract: Methods, systems, and devices for wireless communications are described. A wireless device may divide a data stream into multiple data sub-streams. The wireless device may map the data sub-streams to a set of layers of a multi-layer modulated stream. The wireless device may encode, rate match, modulate, spread and scramble the set of layers before combining them into a combined data stream. The number of layers in the set of layers may be configurable. The wireless device may apply scrambling sequences to the layers. An additional phase rotation or power scaling factor may be applied to each layer. The layers may then be synchronized and combined into a combined data stream. A set of combined data streams may be mapped to multiple-input, multiple-output (MIMO) layers. The wireless device may precode the MIMO layers, map the MIMO layers to tones, and transmit the combined data streams.

公开(公告)号：US20190097678A1

公开(公告)日：2019-03-28

申请号：US16143359

申请日：2018-09-26

Applicant: QUALCOMM Incorporated

Inventor： Seyong Park ,  Pinar Sen ,  Naga Bhushan ,  Tingfang Ji

IPC: H04B1/7103 ,  H04L27/00

Abstract: Methods, systems, and devices for wireless communications are described. A UE may use different modulation schemes, or different modulators, for a single data stream. The set of modulators may be based on a linear combination of a function of encoded bits to be transmitted. In some cases, the UE may use a different permutation or interleaving of the function of bits with the same linear function to generate a different set of modulators. The UE may use a combination of any one or more of the described techniques for generating a set of modulators. Different modulators may be cyclically repeated over time. The UE may apply a device-specific scrambling sequence and transmit the modulated symbols on an uplink channel. The base station may use matched filters and an element-wise estimator (ESE) to compute log-likelihood ratios (LLRs) for each bit of each UE in a received signal.

公开(公告)号：US20190045498A1

公开(公告)日：2019-02-07

申请号：US16045535

申请日：2018-07-25

Applicant: QUALCOMM Incorporated

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

IPC: H04W72/04 ,  H04W72/08

Abstract: Methods, systems, and devices are described for wireless communications. A wireless device may receive an allocation of uplink resources for an uplink transmission of uplink control information (UCI) during a long physical uplink control channel (PUCCH), which may range from four to fourteen symbol periods in length. The wireless device may identify a frequency hopping location based on the length of the PUCCH and a number of bits used to represent the UCI. In some cases, the frequency hopping location partitions the long PUCCH into a first set of symbol periods and a second set of symbol periods. After identifying the frequency hopping location, the wireless device may transmit a UCI message, which may include information and reference symbols, over a first frequency bandwidth during the first set of symbol periods and over a second frequency bandwidth during the second set of symbol periods.

公开(公告)号：US20180367284A1

公开(公告)日：2018-12-20

申请号：US15980571

申请日：2018-05-15

Applicant: QUALCOMM Incorporated

Inventor： Yi Huang ,  Xiaoxia Zhang ,  Renqiu Wang ,  Hao Xu ,  Peter Gaal ,  Seyong Park ,  Sony Akkarakaran

IPC: H04L5/00 ,  H04L1/16 ,  H04L27/26

CPC classification number: H04L5/0055 ,  H04L1/1614 ,  H04L1/1664 ,  H04L1/1671 ,  H04L5/0051 ,  H04L27/2613 ,  H04W72/0413

Abstract: Techniques described herein assist with indicating whether ACK/NACK signaling is present in an uplink transmission, thereby enhancing performance by permitting use of rate matching while reducing decoding errors. For example, a user equipment may determine whether ACK/NACK signaling is to be included in an uplink transmission in a portion of uplink resources allocated for a data channel, may generate a reference signal that indicates whether the ACK/NACK signaling is present in the uplink transmission, and may transmit the reference signal.

公开(公告)号：US20180279348A1

公开(公告)日：2018-09-27

申请号：US15933239

申请日：2018-03-22

Applicant: QUALCOMM Incorporated

Inventor： Yi Huang ,  Hao Xu ,  Wanshi Chen ,  Renqiu Wang ,  Joseph Binamira Soriaga ,  Peter Gaal ,  Seyong Park

IPC: H04W72/12 ,  H04W76/27 ,  H04W52/36 ,  H04W28/02 ,  H04W74/08 ,  H04W72/14

CPC classification number: H04W72/1284 ,  H04W28/0263 ,  H04W28/0278 ,  H04W52/365 ,  H04W72/1263 ,  H04W72/1268 ,  H04W72/1289 ,  H04W72/14 ,  H04W74/0833 ,  H04W76/27

Abstract: Aspects of the present disclosure provide for opportunistic uplink transmissions within a slot. In some examples, after scheduling all regular uplink transmissions within a current slot, a base station (e.g., gNB) may identify a set of unused uplink resources within the current slot and generate and transmit unused resource information identifying the set of unused resources to the user equipment (UE) within the cell served by the base station. If a particular UE is configured to operate in an opportunistic mode, the UE may utilize the unused resource information to generate and transmit an opportunistic uplink transmission within the set of unused uplink resources.

公开(公告)号：US20180279325A1

公开(公告)日：2018-09-27

申请号：US15906813

申请日：2018-02-27

Applicant: QUALCOMM Incorporated

Inventor： Yi Huang ,  Renqiu Wang ,  Wanshi Chen ,  Hao Xu ,  Peter Gaal ,  Seyong Park

IPC: H04W72/12 ,  H04L5/14 ,  H04L12/24 ,  H04L12/26 ,  H04W24/08

CPC classification number: H04W72/12 ,  H04L5/0044 ,  H04L5/0053 ,  H04L5/0094 ,  H04L5/14 ,  H04L5/1469 ,  H04L41/08 ,  H04L43/0858 ,  H04L43/10 ,  H04L43/16 ,  H04W24/08 ,  H04W72/1226

Abstract: Aspects of the present disclosure relate to wireless communication systems configured to provide user equipment (UE)-specific slot structures based on the individual propagation delay experienced by each UE. In some examples, the duration of uplink transmissions for a particular UE within a slot may be configured based on the propagation delay between the base station and that particular UE. For example, the duration of an uplink burst and/or an uplink traffic transmission may be configured based on the propagation delay. In addition, a downlink burst within a slot may be configured for a particular UE on the propagation delay experienced by that UE. Downlink traffic transmissions may further be configured for the cell based on the maximum propagation delay experienced by the UEs in the cell.