公开(公告)号：US20230336388A1

公开(公告)日：2023-10-19

申请号：US18182288

申请日：2023-03-10

Applicant: QUALCOMM Incorporated

Inventor： Stephen Jay SHELLHAMMER ,  Bin TIAN ,  Sameer VERMANI ,  Jialing Li CHEN ,  Youhan KIM

IPC: H04L27/26

CPC classification number: H04L27/2603 ,  H04L27/2621 ,  H04W84/12

Abstract: This disclosure provides methods, devices and systems for wireless communication, and particularly, for generating or receiving a multi-generation physical layer protocol data unit (PPDU). The multi-generation PPDU may concurrently include a first generation-specific preamble based on a first generation of a wireless communication specification (such as that defined by the Institute of Electrical and Electronics Engineers (IEEE) 802.11 family of standards) and a second generation-specific preamble based on a second generation of the wireless communication specification in a same transmission. The generation-specific preambles may be generated based on bandwidth portions of a wireless channel that each generation-specific preamble will occupy in the multi-generation PPDU. One or more of the generation-specific preambles may be modified based on an aggregate bandwidth of the multi-generation PPDU. This disclosure includes several options for modifying one or more generation-specific preambles or data fields to accommodate their use in a multi-generation PPDU.

公开(公告)号：US20230135383A1

公开(公告)日：2023-05-04

申请号：US18148104

申请日：2022-12-29

Applicant: QUALCOMM Incorporated

Inventor： Lin YANG ,  Bin TIAN ,  Dung Ngoc DOAN ,  Jialing Li CHEN ,  Didier Johannes Richard VAN NEE

IPC: H04W72/044 ,  H04L69/323

Abstract: This disclosure provides methods, devices and systems for encoding data for wireless communication to achieve a desired amplitude distribution. Some implementations more specifically relate to performing an encoding operation to shape the amplitudes of the resultant symbols such that the amplitudes have a non-uniform distribution. In some implementations of the non-uniform distribution, the probabilities associated with the respective amplitudes generally increase with decreasing amplitude. Some implementations enable the tracking of MPDU boundaries to facilitate successful decoding by a receiving device. Additionally or alternatively, some implementations enable the determination of a packet length after performing the amplitude shaping, which enables a transmitting device to determine the number of padding bits to add to the payload and to signal the packet length to a receiving device so that the receiving device may determine the duration of the packet.

公开(公告)号：US20220385521A1

公开(公告)日：2022-12-01

申请号：US17330238

申请日：2021-05-25

Applicant: QUALCOMM Incorporated

Inventor： Jialing Li CHEN ,  Kanke WU ,  Bin TIAN

IPC: H04L27/28 ,  H04L1/00 ,  H04L27/20

Abstract: This disclosure provides methods, devices and systems for increasing the transmit power of wireless communication devices operating on power spectral density (PSD)-limited wireless channels. Some implementations more specifically relate to tone mapping techniques and packet designs that support duplicate (or “DUP mode”) transmissions to multiple users. In some implementations, an access point (AP) may transmit a PPDU that includes first user data and second user data, where at least the first user data is transmitted in a DUP mode. As such, the first user data may be mapped to a number (N) of tones spanning a first RU in accordance with a dual carrier modulation (DCM) scheme, and a duplicate copy of the first user data may be mapped to N tones spanning a second RU in accordance with the DCM scheme. In some implementations, the second user data also may be transmitted in a DUP mode.

公开(公告)号：US20210367886A1

公开(公告)日：2021-11-25

申请号：US17323563

申请日：2021-05-18

Applicant: QUALCOMM Incorporated

Inventor： Jialing Li CHEN ,  Sameer Vermani ,  Bin Tian

IPC: H04L12/741

Abstract: This disclosure provides methods, devices and systems for generating packet preambles. Some implementations more specifically relate to preamble designs that support gains in data throughput achievable in accordance with the IEEE 802.11be amendment, and future generations, of the IEEE 802.11 standard. Among other examples, the preamble designs of the present implementations may allow for more reliable packet detection, more accurate channel estimation, and more robust decoding of signal field (SIG) symbols. Additionally, or alternatively, the preamble designs of the present disclosure may be implemented with different lengths, modulation schemes, or transmit power compared to preamble designs that conform to existing versions of the IEEE 802.11 standard.

公开(公告)号：US20210160713A1

公开(公告)日：2021-05-27

申请号：US17092702

申请日：2020-11-09

Applicant: QUALCOMM Incorporated

Inventor： Lin YANG ,  Bin TIAN ,  Stephen Jay SHELLHAMMER ,  Dung Ngoc DOAN ,  Sameer VERMANI ,  Jialing Li CHEN

IPC: H04W24/08 ,  H04L27/26

Abstract: This disclosure provides methods, devices and systems for link adaptation in wireless communications. Some implementations more specifically relate to transmitter-based modulation and coding scheme (MCS) selection. A transmitting device transmits a test packet, over a wireless channel, to a receiving device. The receiving device generates one or more signal-to-interference-plus-noise ratio (SINR) estimates for the wireless channel based on the received sounding packet. In some aspects, each SINR estimate may be associated with a particular modulation order. In some other aspects, each SINR estimate may be generated based on a transmitter configuration or a receiver type to be used for subsequent communications between the transmitting device and the receiving device. The receiving device transmits feedback, including the SINR estimates, to the transmitting device. The transmitting device then selects an MCS to be used for subsequent communications with the receiving device based on the SINR estimates and associated modulation orders.

公开(公告)号：US20210127291A1

公开(公告)日：2021-04-29

申请号：US17078890

申请日：2020-10-23

Applicant: QUALCOMM Incorporated

Inventor： Jialing Li CHEN ,  Sameer VERMANI ,  Bin TIAN ,  Lin YANG

IPC: H04W28/02 ,  H04W28/06

Abstract: This disclosure provides methods, devices and systems for generating packet preambles. Some implementations more specifically relate to preamble designs for special cases such as, for example, full-bandwidth multi-user multiple-input multiple-output (MU-MIMO), single-user (SU) preamble puncturing, hybrid automatic repeat request (HARQ), and multi-AP coordination. Multi-AP coordination may refer to coordinated beamforming (CoBF), joint transmission (JT), or coordinated orthogonal frequency division multiple access (C-OFDMA). Additionally, or alternatively, some implementations more specifically relate to preamble designs that accommodate signal fields of different cases.

公开(公告)号：US20200083983A1

公开(公告)日：2020-03-12

申请号：US16562907

申请日：2019-09-06

Applicant: QUALCOMM Incorporated

Inventor： Jialing Li CHEN ,  Dung Ngoc DOAN ,  Bin TIAN ,  Lin YANG ,  Sameer VERMANI ,  Lochan VERMA ,  Stephen Jay Shellhammer

IPC: H04L1/00 ,  H04L1/18 ,  H04L27/26 ,  H04B7/0417

Abstract: This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for low density parity check (LDPC)-based incremental redundancy (IR) hybrid automatic repeat request (HARQ) transmission processing. In one aspect, an apparatus for wireless communications is configured to generate a first packet using a LDPC encoding process. The apparatus is further configured to generate coded bits using a second LDPC encoding process if the first packet is not successfully decoded by a wireless device, generate a second packet including at least some of the coded bits generated using the second LDPC encoding process, and output the second packet for transmission.

公开(公告)号：US20190058545A1

公开(公告)日：2019-02-21

申请号：US16058301

申请日：2018-08-08

Applicant: QUALCOMM Incorporated

Inventor： Jialing Li CHEN ,  Lin YANG ,  Bin TIAN ,  Ning ZHANG ,  Vincent Knowles JONES, IV ,  Didier Johannes Richard VAN NEE ,  Louay JALLOUL ,  Ahmad Abdulrahman MOHAMMED

IPC: H04L1/00 ,  H04W52/02

Abstract: Apparatuses and methods for correcting a distorted signal at a receiver device during wireless local area network (WLAN) communications are disclosed. The apparatuses and methods include receiving, by a receiver device in a WLAN, a distorted signal corresponding to a data packet signal transmitted from a transmitter device, receiving, by the receiver device, one or more transmitter parameters corresponding to the transmission of the data packet signal, the one or more transmitter parameters including information to adjust the distorted signal, and adjusting, by the receiver device, the distorted signal to reconstruct the data packet signal based at least on the one or more transmitter parameters.

公开(公告)号：US20170127385A1

公开(公告)日：2017-05-04

申请号：US15341982

申请日：2016-11-02

Applicant: QUALCOMM Incorporated

Inventor： Sameer VERMANI ,  Bin TIAN ,  Jialing Li CHEN

IPC: H04W72/04 ,  H04B7/06 ,  H04B7/04

CPC classification number: H04W72/04 ,  H04B7/0413 ,  H04B7/0417 ,  H04B7/0617 ,  H04B7/0626 ,  H04B7/0634 ,  H04B7/0643

Abstract: Aspects of the present disclosure provide techniques for sounding procedures and feedback report formats.

公开(公告)号：US20170054542A1

公开(公告)日：2017-02-23

申请号：US15240066

申请日：2016-08-18

Applicant: QUALCOMM Incorporated

Inventor： Sameer VERMANI ,  Bin TIAN ,  Jialing Li CHEN ,  Arjun BHARADWAJ ,  Youhan KIM

IPC: H04L5/00

CPC classification number: H04L5/0057 ,  H04B7/0417 ,  H04B7/0626 ,  H04B7/0643 ,  H04L5/0044 ,  H04L5/006

Abstract: Aspects of the present disclosure provide techniques for sounding procedures using frames with some portions that use relatively long symbol durations. Certain aspects of the present disclosure provide a method that may be performed by an access point. The method generally includes generating one or more frames, collectively having one or more training fields allowing one or more stations to calculate channel information and an indication of one or more feedback parameters for the one or more stations to use for generating the channel information; transmitting the one or more frames; and receiving channel information from at least one of the stations calculated, in accordance with the one or more feedback parameters, for a corresponding one or more reporting units based on the one or more training fields, wherein the channel information is received via a report containing a plurality of channel information parameters for each of the one or more reporting units.

Abstract translation: 本公开的方面提供了使用具有使用相对长的符号持续时间的一些部分的帧的探测过程的技术。 本公开的某些方面提供了可由接入点执行的方法。 该方法通常包括生成一个或多个帧，共同具有允许一个或多个站计算信道信息的一个或多个训练场，以及用于一个或多个站用于生成频道信息的一个或多个反馈参数的指示; 发送一个或多个帧; 以及基于所述一个或多个训练场，从根据所述一个或多个反馈参数计算出的对应的一个或多个报告单元计算出的至少一个站的信道信息，其中所述信道信息经由包含 用于所述一个或多个报告单元中的每一个的多个信道信息参数。