公开(公告)号：US11438038B1

公开(公告)日：2022-09-06

申请号：US17178175

申请日：2021-02-17

Applicant: QUALCOMM Incorporated

Inventor： June Namgoong ,  Taesang Yoo ,  Naga Bhushan ,  Hwan Joon Kwon ,  Krishna Kiran Mukkavilli ,  Tingfang Ji

IPC: H04L23/02 ,  H04B7/0452 ,  H04B7/0456

Abstract: A base station may apply a nonlinear precoding to data for MU-MIMO transmission to a set of paired UEs to generate a first set of precoder symbols, and apply a linear precoding to the first set of precoder symbols to generate a second set of precoder symbols using a linear precoding matrix. The base station may normalize the second set of precoder symbols, and scale the second set of precoder symbols, before transmission of the data, using a scaling factor based on one or more of modulation symbols or a channel matrix. The base station may apply the linear precoding to DMRS associated with the data. The base station may transmit the second set of precoder symbols based on the second set of precoder symbols and the DMRS to the set of paired UEs.

公开(公告)号：US20220070040A1

公开(公告)日：2022-03-03

申请号：US17384411

申请日：2021-07-23

Applicant: QUALCOMM Incorporated

Inventor： June Namgoong ,  Taesang Yoo ,  Naga Bhushan ,  Krishna Kiran Mukkavilli ,  Tingfang Ji ,  Pavan Kumar Vitthaladevuni ,  Jay Kumar Sundararajan

IPC: H04L27/26 ,  G06N3/08

Abstract: Various embodiments include methods for demodulating wireless transmission waveforms to reconstruct data tones, performed in receiver circuitry of a wireless communication device. The methods may include receiving time domain wireless transmission waveforms that include time domain peak reduction tones (PRTs) that were generated by a set of PRT neural networks using time domain data signals derived from frequency domain data tones in another wireless communication device, reconstructing the time domain data signals from the time domain wireless transmission waveforms using a receiver neural network that has been trained in conjunction with the set of PRT neural networks to generate a time domain reconstruction of data signals, and transforming the time domain reconstruction of data signals to a frequency domain reconstruction of data tones.

公开(公告)号：US20220060917A1

公开(公告)日：2022-02-24

申请号：US17396248

申请日：2021-08-06

Applicant: QUALCOMM Incorporated

Inventor： Pavan Kumar Vitthaladevuni ,  Taesang Yoo ,  Naga Bhushan ,  June Namgoong ,  Jay Kumar Sundararajan ,  Krishna Kiran Mukkavilli ,  Tingfang Ji ,  Wanshi Chen ,  Hwan Joon Kwon

IPC: H04W24/08 ,  G06N3/04 ,  H04W36/00

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may transmit a request for sets of neural network weights, each set corresponding to a neural network, to one or more network entities. The one or more network entities may transmit multiple sets of neural network weights to the UE in response to the request. The UE may run a classifier neural network on the sets of neural network weights to select a set of neural network weights corresponding to a neural network. The UE may transmit a neural network identifier to the one or more network entities that transmitted neural network weights.

公开(公告)号：US20210344545A1

公开(公告)日：2021-11-04

申请号：US17185603

申请日：2021-02-25

Applicant: QUALCOMM Incorporated

Inventor： Gokul Sridharan ,  Saeid Sahraei ,  June Namgoong ,  Peter Gaal ,  Krishna Kiran Mukkavilli ,  Tingfang Ji ,  Wei Yang

IPC: H04L27/26 ,  H04L25/03 ,  H04W72/04 ,  H04B1/71

Abstract: Techniques for peak-to-average power ratio (PAPR) reduction are described. Wireless devices may use one or more PAPR shaping resources, such as expanded bandwidth and/or pulse-shaping filtering, for shaping a signal to reduce PAPR. For example, expanded bandwidth may be utilized for adding a cyclic affix (CA), such as may comprise a cyclic prefix (CP), cyclic suffix (CS), etc., and combinations thereof, to a frequency domain data signal to provide a CP augmented frequency domain data signal used to generate a reduced PAPR time domain data signal. Additionally or alternatively, pulse-shaping filtering may be applied to a frequency domain signal to provide a pulse-shaped frequency domain data signal used to generate a reduced PAPR time domain data signal. Other aspects and features are also claimed and described.

公开(公告)号：US10938496B2

公开(公告)日：2021-03-02

申请号：US16453821

申请日：2019-06-26

Applicant: QUALCOMM Incorporated

Inventor： Alexandros Manolakos ,  Yang Yang ,  June Namgoong ,  Jing Jiang

IPC: H04J11/00 ,  H04L5/00 ,  H04L27/26 ,  H04J13/00 ,  H04B7/06 ,  H04W56/00

Abstract: Wireless communication devices are adapted to facilitate multiplexing of signals. According to one example, a wireless communication device can multiplex a first signal and a second signal for transmission across a first resource element and a second resource element. The first resource element may utilize a first subcarrier in a first symbol employing a first numerology. The second resource element may utilize a second subcarrier in a second symbol employing a second numerology that is different from the first numerology, where the second subcarrier overlaps in frequency at least a portion of the first subcarrier. The first and second symbols including the multiplexed first and second signals may subsequently be transmitted. Other aspects, embodiments, and features are also included.

公开(公告)号：US10687252B2

公开(公告)日：2020-06-16

申请号：US15466663

申请日：2017-03-22

Applicant: QUALCOMM Incorporated

Inventor： Alexandros Manolakos ,  June Namgoong ,  Yang Yang ,  Jing Jiang

IPC: H04W4/00 ,  H04W28/20 ,  H04W72/04 ,  H04L5/00 ,  H04W72/08 ,  H04W72/12

Abstract: A method at a scheduling entity might include determining that interference is present from a neighboring scheduling entity, which implements a second subcarrier spacing that is different from a first subcarrier spacing of the scheduling entity. The scheduling entity might request the neighboring scheduling entity to negotiate a bandwidth group (BWG), where the BWG is a bandwidth occupied by downlink subcarriers within which a transmission parameter is maintained. The method might include negotiating a bandwidth of the bandwidth group and transmitting, if negotiating is successful, downlink data to a scheduled entity served by the scheduling entity according to the negotiated bandwidth. The transmission parameter might be a precoder, rank, modulation order, power inside each BWG, or numerology. The numerology might be scalable and might be a combination of subcarrier spacing and cyclic prefix (CP) overhead, The subcarrier spacing might be scaled while keeping constant the CP overhead as a percentage of a symbol duration.

公开(公告)号：US10686506B2

公开(公告)日：2020-06-16

申请号：US16053547

申请日：2018-08-02

Applicant: QUALCOMM Incorporated

Inventor： Makesh Pravin John Wilson ,  Tao Luo ,  June Namgoong ,  Sony Akkarakaran ,  Xiao Feng Wang ,  Sumeeth Nagaraja ,  Juan Montojo ,  Shengbo Chen ,  Kaushik Chakraborty ,  Wooseok Nam

IPC: H04L5/00 ,  H04W72/04 ,  H04W72/08 ,  H04W88/08 ,  H04B7/06 ,  H04B7/08 ,  H04W16/28 ,  H04W76/27 ,  H04W88/02

Abstract: Aspects of the present disclosure relate to deriving spatial receive parameters for quasi-colocation at a user equipment (UE). An exemplary method generally includes receiving a plurality of beams from a base station in a plurality of coarse directions, determining, based on the plurality of beams, a first spatial colocation parameter, transmitting an indication of a coarse direction associated with a beam having a highest receive strength of the plurality of beams, receiving a plurality of second beams from the base station based on the indication, the plurality of second beams having a narrower beam width than the plurality of beams and covering a beam width of the beam associated with the indicated coarse direction, determining, based on the plurality of second beams, a second spatial colocation parameter, transmitting an indication of the second beam having a highest receive strength, and refining at least one of the first or second spatial colocation parameters.

公开(公告)号：US10667143B2

公开(公告)日：2020-05-26

申请号：US15186407

申请日：2016-06-17

Applicant: QUALCOMM Incorporated

Inventor： Chih-Hao Liu ,  June Namgoong ,  Srikant Jayaraman

IPC: H04W16/28 ,  H04B7/185 ,  H04W72/04

Abstract: Aspects of the present disclosure generally relate to techniques and apparatus that may help improve greatly reduce the implementation complexity of the ground station, and ground base-station user capacity by utilizing a subband beamformer for processing uplink signals received from aircraft at ground base stations, in an air-to-ground (ATG) system. The techniques presented herein may allow for dynamic subband allocation to different airborne devices with multi-user beamforming and subband combining.

公开(公告)号：US10447447B2

公开(公告)日：2019-10-15

申请号：US15475541

申请日：2017-03-31

Applicant: QUALCOMM Incorporated

Inventor： June Namgoong ,  Tao Luo ,  Alexandros Manolakos ,  Jing Jiang ,  Yang Yang ,  Joseph Binamira Soriaga ,  Tingfang Ji

IPC: H04L5/00 ,  H04B7/0413 ,  H04L27/26 ,  H04B7/00

Abstract: Methods and apparatus for multiplexing reference signals for Multiple Input Multiple Output (MIMO) layers are provided. Resources for Demodulation Reference Signals (DMRS) corresponding to each of two or more data streams are assigned, wherein the resources assigned to each of the data streams are staggered in frequency and span two or more OFDM (Orthogonal Frequency Divisional Multiplexing) symbols. The DMRS is transmitted using the assigned resources.

公开(公告)号：US10411782B2

公开(公告)日：2019-09-10

申请号：US15469806

申请日：2017-03-27

Applicant: QUALCOMM Incorporated

Inventor： June Namgoong ,  Alexandros Manolakos ,  Joseph Binamira Soriaga ,  Jing Jiang ,  Tingfang Ji

IPC: H04B17/364 ,  H04B7/06 ,  H04B7/0456 ,  H04L1/00 ,  H04L5/00 ,  H04W52/02 ,  H04W52/04 ,  H04W52/26 ,  H04B7/0408 ,  H04B7/08 ,  H04L25/02 ,  H04L25/03

Abstract: In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be a UE. The apparatus may receive a transmission over a precoded channel. The transmission may include a layer having a plurality of symbols, each symbol having a plurality of modulated tones precoded on a per-tone basis. The receive layer may be associated with a power delay profile. The apparatus may estimate the precoded channel based on a time support of the power delay profile.