公开(公告)号：US20230246693A1

公开(公告)日：2023-08-03

申请号：US18004611

申请日：2021-08-13

Applicant: QUALCOMM Incorporated

Inventor： Pavan Kumar VITTHALADEVUNI ,  Hwan Joon KWON ,  Taesang YOO ,  Alexandros MANOLAKOS ,  Naga BHUSHAN ,  June NAMGOONG ,  Jay Kumar SUNDARARAJAN ,  Krishna Kiran MUKKAVILLI ,  Tingfang JI

IPC: H04B7/06 ,  H04L1/00

CPC classification number: H04B7/0641 ,  H04L1/0026 ,  H04B7/0626 ,  H04L1/0029

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first device may receive a channel state information (CSI) feedback configuration comprising an indication to save, for a specified time period, a channel state feedback (CSF) that corresponds to a first reference signal carried on a downlink channel. The first device may transmit a differential CSF based at least in part on the CSF and a second reference signal carried on the downlink channel. Numerous other aspects are provided.

公开(公告)号：US20230188302A1

公开(公告)日：2023-06-15

申请号：US18004286

申请日：2020-08-31

Applicant: QUALCOMM INCORPORATED

Inventor： Pavan Kumar VITTHALADEVUNI ,  Taesang YOO ,  Naga BHUSHAN ,  June NAMGOONG ,  Bo CHEN ,  Ruifeng MA ,  Krishna Kiran MUKKAVILLI ,  Tingfang JI

IPC: H04L5/00 ,  H04W72/231 ,  G06N3/08

CPC classification number: H04L5/0057 ,  H04L5/0048 ,  H04W72/231 ,  G06N3/08

Abstract: Methods, systems, and devices for wireless communications are described. Generally, the described techniques at a user equipment (UE) provide for efficiently reporting channel state information (CSI) to a base station with an appropriate level of accuracy. In particular, the base station may indicate a level of accuracy to the UE for reporting CSI. The UE may encode the CSI using a first neural network, and the base station may decode the CSI using a second neural network. The first and second neural networks may form a neural network pair, and the UE may train the neural network pair based on the level of accuracy indicated by the base station. For example, the base station may indicate a loss function corresponding to a level of accuracy with which CSI is to be reported by the UE, and the UE may train the neural network pair using the loss function.

公开(公告)号：US20220131590A1

公开(公告)日：2022-04-28

申请号：US17423410

申请日：2020-01-21

Applicant: QUALCOMM Incorporated

Inventor： Ruifeng MA ,  Yuwei REN ,  Bo CHEN ,  Renqiu WANG ,  Pavan Kumar VITTHALADEVUNI ,  Tingfang JI ,  Hao XU

IPC: H04B7/06

Abstract: Certain aspects of the present disclosure generally relate to methods and apparatus for providing channel state feedback. One example method generally includes receiving at least one first pilot signal, and generating a first channel state information (CSI) report based on the at least one first pilot signal. The first CSI report may include a differential phase feedback for each subband (SB) of one or more SBs associated with the at least one first pilot signal. The method may also include transmitting the first CSI report having the differential phase feedback.

公开(公告)号：US20220078649A1

公开(公告)日：2022-03-10

申请号：US17275128

申请日：2019-09-26

Applicant: QUALCOMM Incorporated

Inventor： Bo CHEN ,  Pavan Kumar VITTHALADEVUNI ,  Yu ZHANG ,  Ruifeng MA ,  Joseph Binamira SORIAGA ,  Yeliz TOKGOZ ,  Tingfang JI ,  Alexandros MANOLAKOS

IPC: H04W24/10 ,  H04L5/00 ,  H04L25/02

Abstract: Certain aspects of the present disclosure generally relate to methods and apparatus for sounding reference signal (SRS) guided downlink channel state information-reference signal (CSI-RS) scan. One example method for wireless communication generally includes determining whether to perform channel measurement and reporting operations for a user-equipment (UE) using a reciprocity-based scheme or a channel state information-reference signal (CSI-RS) based scheme based on a criteria of a cell, and performing the channel measurement and reporting operations based on the determination

公开(公告)号：US20220021558A1

公开(公告)日：2022-01-20

申请号：US17309369

申请日：2018-11-21

Applicant: QUALCOMM Incorporated

Inventor： Bo CHEN ,  Pavan Kumar VITTHALADEVUNI ,  Joseph Binamira SORIAGA ,  Ruifeng MA ,  Alexandros MANOLAKOS ,  Yeliz TOKGOZ ,  Tingfang JI ,  Hao XU

IPC: H04L25/02 ,  H04L5/00 ,  H04W24/10

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment may receive a signaling communication that includes information specifying whether a channel state information reference signal (CSI-RS) precoding resource block group includes a same quantity of resource blocks (RBs) that is included in a CSI reporting subband configured for the UE. The CSI-RS precoding resource block group may enable the UE to perform a channel estimation based at least in part on a CSI-RS transmitted by a base station. The UE may perform the channel estimation based at least in part on the CSI-RS transmitted by the base station. The channel estimation may be based at least in part on whether the CSI-RS precoding resource block group includes the same quantity of RBs that is included in the CSI reporting subband configured for the UE. Numerous other aspects are provided.

公开(公告)号：US20210351827A1

公开(公告)日：2021-11-11

申请号：US17276765

申请日：2018-10-16

Applicant: Chenxi HAO ,  Yu ZHANG ,  Bo CHEN ,  Ruifeng MA ,  Pavan Kumar VITTHALADEVUNI ,  Wanshi CHEN ,  Qiaoyu LI ,  Liangming WU ,  QUALCOMM Incorporated

Inventor： Chenxi HAO ,  Yu ZHANG ,  Bo CHEN ,  Ruifeng MA ,  Pavan Kumar VITTHALADEVUNI ,  Wanshi CHEN ,  Qiaoyu LI ,  Liangming WU

IPC: H04B7/06 ,  H04B7/0456 ,  H04L25/02 ,  H04L5/00

Abstract: Certain aspects of the present disclosure provide techniques for uplink sounding reference signal (SRS) transmission with precoding. A method for wireless communication by a user equipment (UE) includes receiving a SRS configuration that configures one or more SRS resource sets, each resource set including one or more SRS resources, each SRS resource comprising one or more SRS ports. The UE receives a set of precoders via an indicator, the set of precoders including a precoder associated with each SRS resource and determines one or more precoders to apply for one or more SRS transmissions via one or more of the SRS resources.

公开(公告)号：US20210266210A1

公开(公告)日：2021-08-26

申请号：US17154607

申请日：2021-01-21

Applicant: QUALCOMM Incorporated

Inventor： June NAMGOONG ,  Krishna Kiran MUKKAVILLI ,  Taesang YOO ,  Naga BHUSHAN ,  Tingfang JI ,  Jay Kumar SUNDARARAJAN ,  Pavan Kumar VITTHALADEVUNI

IPC: H04L27/26 ,  H04L5/00 ,  H04W72/04 ,  G06N3/08 ,  G06N3/04

Abstract: Certain aspects of the present disclosure provide techniques for generating and decoding orthogonal frequency division (OFDM) waveforms with peak reduction tones (PRTs) designed to reduce PAPR. By generating PRT tones with a machine learning (e.g., neural network) based encoder and mapping some of the PRT tones to subcarriers used for physical channels or signals, PAPR may be reduced while efficiently using system resources.

公开(公告)号：US20210266203A1

公开(公告)日：2021-08-26

申请号：US16914011

申请日：2020-06-26

Applicant: QUALCOMM Incorporated

Inventor： Taesang YOO ,  June NAMGOONG ,  Naga BHUSHAN ,  Tingfang JI ,  Krishna Kiran MUKKAVILLI ,  Pavan Kumar VITTHALADEVUNI ,  Jay Kumar SUNDARARAJAN

IPC: H04L25/03 ,  H04L25/02 ,  H04L5/00

Abstract: Various embodiments may employ neural networks at transmitting devices to compress transmit (TX) waveform distortion. In various embodiments, compressed TX waveform distortion information may be conveyed to a receiving device. In various embodiments, the signaling of TX waveform distortion information from a transmitting device to a receiving device may enable a receiving device to mitigate waveform distortion in a transmit waveform received from the transmitting device. Various embodiments include systems and methods of wireless communication by transmitting a waveform to a receiving device performed by a processor of a transmitting device. Various embodiments include systems and methods of wireless communication by receiving a waveform from a transmitting device performed by a processor of a receiving device.

公开(公告)号：US20210135823A1

公开(公告)日：2021-05-06

申请号：US16473917

申请日：2018-01-08

Applicant: QUALCOMM Incorporated

Inventor： Yu ZHANG ,  Chao WEI ,  Wanshi CHEN ,  Pavan Kumar VITTHALADEVUNI

IPC: H04L5/00 ,  H04B7/06

Abstract: Certain aspects of the present disclosure relate to methods and apparatus for transmitting multiplexed sounding reference signal (SRS) ports in communications systems operating according to new radio (NR) technologies. An exemplary method includes obtaining an indication of a technique to use in transmitting sounding reference signals (SRS) via five or more antenna ports in one slot and transmitting the SRS via the five or more antenna ports according to the indicated technique.

公开(公告)号：US20200351125A1

公开(公告)日：2020-11-05

申请号：US16619038

申请日：2018-05-28

Applicant: QUALCOMM Incorporated

Inventor： June NAMGOONG ,  Pavan Kumar VITTHALADEVUNI ,  Yu ZHANG ,  Joseph Binamira SORIAGA ,  Jing JIANG ,  Alexandros MANOLAKOS

IPC: H04L25/02 ,  H04L5/00 ,  H04W72/04 ,  H04B7/0417 ,  H04B7/06

Abstract: Aspects of the present disclosure disclose techniques for the indication of the allocation of the downlink (DL) demodulation reference signal (DM-RS) ports for the data channel in NR communications. In some examples, the channel state information (CSI) reference signal (CSI-RS) may be associated with a corresponding DM-RS for a DL data channel. The transmitting device, in some examples, may further transmit a notification that provides resource allocations (e.g., port allocations) that minimize the redundant information that is required to be transmitted from the base station to the user equipment (UE) when the DM-RS port allocation is the same as the CSI-RS port allocation received by the UE in an earlier time slot.