公开(公告)号：US12250670B2

公开(公告)日：2025-03-11

申请号：US18423033

申请日：2024-01-25

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：US12212413B2

公开(公告)日：2025-01-28

申请号：US18145844

申请日：2022-12-22

Applicant: QUALCOMM Incorporated

Inventor： Kanke Wu ,  Bin Tian ,  Lin Yang

IPC: H04L1/00 ,  H03M13/11

Abstract: Methods, systems, and devices for wireless communications are described. A first wireless device, such as a wireless station (STA) or a wireless access point (AP), performs a low-density parity check (LDPC) coding operation on input bits of a set of code blocks. Performing the LDPC coding operation on the input bits produces a set of codewords including one or more codewords having a first codeword length and one or more codewords having a second, shorter codeword length. The first wireless device arranges the set of codewords into a set of symbols such that a last symbol in time of the set of symbols includes the one or more codewords each having the second codeword length and no codewords having the first codeword length. The first wireless device, transmits, to a second wireless device, the plurality of symbols.

公开(公告)号：US12191884B2

公开(公告)日：2025-01-07

申请号：US18189865

申请日：2023-03-24

Applicant: QUALCOMM Incorporated

Inventor： Thomas Joseph Richardson ,  Kanke Wu ,  Bin Tian ,  Didier Johannes Richard Van Nee

IPC: H03M13/11 ,  H03M13/00 ,  H04L1/00

Abstract: This disclosure provides methods, components, devices and systems for low-density parity check (LDPC) coding. Some aspects more specifically relate to extending LDPC codewords to produce longer codewords. In some examples, a first wireless device may generate a baseline LDPC code by performing a first lifting on a base matrix, which may produce an LDPC code used for a current Wi-Fi implementation. The first wireless device may then perform a second lifting or a re-lifting (such as a cyclic lifting, a product lifting, a swapping lifting, or a combination thereof) to generate an extended lifted code. This extended lifted code may be an extension of the first LDPC code such that the first LDPC code may be preserved as part of the extended code. Then first wireless device may then transmit the extended LDPC code as an extended or lifted codeword.

公开(公告)号：US12177803B2

公开(公告)日：2024-12-24

申请号：US18492594

申请日：2023-10-23

Applicant: QUALCOMM Incorporated

Inventor： Lochan Verma ,  Bin Tian ,  Sameer Vermani ,  Lin Yang

IPC: H04W56/00 ,  H04J3/06 ,  H04L5/00 ,  H04L27/26 ,  H04L69/28 ,  H04W88/08

Abstract: This disclosure provides systems, methods, apparatus, including computer programs encoded on computer storage media for orthogonal multiplexing of high efficiency (HE) and extremely high throughput (EHT) wireless traffic. Devices in a wireless local area network (WLAN) may operate under HE or EHT conditions. An access point (AP) may support both HE and EHT communications with WLAN devices. To enable substantially simultaneous downlink HE and EHT transmissions and substantially simultaneous uplink HE and EHT transmissions, the AP may support orthogonal frequency-division multiple access (OFDMA) of HE and EHT transmissions. For example, pre-HE and pre-EHT modulated fields, HE and EHT modulated fields, and payloads may be aligned in time for the HE and EHT transmissions. The AP may ensure orthogonality for multiplexing the HE and EHT transmissions based on the alignment. In some implementations, a trigger frame may be utilized to indicate uplink transmission alignments.

公开(公告)号：US20240322840A1

公开(公告)日：2024-09-26

申请号：US18189865

申请日：2023-03-24

Applicant: QUALCOMM Incorporated

Inventor： Thomas Joseph Richardson ,  Kanke Wu ,  Bin Tian ,  Didier Johannes Richard Van Nee

IPC: H03M13/11 ,  H03M13/00 ,  H04L1/00

CPC classification number: H03M13/1174 ,  H03M13/116 ,  H03M13/616 ,  H04L1/0057

Abstract: This disclosure provides methods, components, devices and systems for low-density parity check (LDPC) coding. Some aspects more specifically relate to extending LDPC codewords to produce longer codewords. In some examples, a first wireless device may generate a baseline LDPC code by performing a first lifting on a base matrix, which may produce an LDPC code used for a current Wi-Fi implementation. The first wireless device may then perform a second lifting or a re-lifting (such as a cyclic lifting, a product lifting, a swapping lifting, or a combination thereof) to generate an extended lifted code. This extended lifted code may be an extension of the first LDPC code such that the first LDPC code may be preserved as part of the extended code. Then first wireless device may then transmit the extended LDPC code as an extended or lifted codeword.

公开(公告)号：US20240314753A1

公开(公告)日：2024-09-19

申请号：US18185251

申请日：2023-03-16

Applicant: QUALCOMM Incorporated

Inventor： Lin Yang ,  Bin Tian ,  Youhan Kim

IPC: H04W72/0453 ,  H04W56/00

CPC classification number: H04W72/0453 ,  H04W56/001 ,  H04L5/0007

Abstract: Methods, systems, and devices for wireless communications are described. A wireless station (STA) (for example, an access point (AP) or a non-AP STA) may transmit a message to one or more STAs in a multiple basic service set (BSS) system that indicates one or more distributed resource units (RUs) for the STAs to use for communications, in which each distributed RU includes a respective set of tones interspersed within a channel bandwidth such that tones of different BSSs are interleaved. For example, a coordinating STA may indicate respective distributed RUs assigned to each BSS, and may communicate with the STAs using tones of the distributed RUs for the BSS supported by the coordinating STA. In some other examples, a STA may indicate occupied distributed RUs and a permission condition to another STA, such that the other STA may use unoccupied distributed RUs for communications in accordance with the permission condition.

公开(公告)号：US11956179B2

公开(公告)日：2024-04-09

申请号：US17382263

申请日：2021-07-21

Applicant: QUALCOMM Incorporated

Inventor： Kanke Wu ,  Jialing Li Chen ,  Bin Tian

IPC: H04L5/00 ,  H04W72/0453

CPC classification number: H04L5/0098 ,  H04L5/001 ,  H04L5/003 ,  H04W72/0453

Abstract: Duplicated physical layer convergence protocol (PLCP) protocol data unit (PPDU) transmission is described for a wireless device with reduced peak-to-average power ratios (PAPR). One example includes obtaining a first sub-PPDU from to PPDU that includes a data field with data content. A second sub-PPDU may also be obtained by duplicating the PPDU including the data content of the PPDU. At least one of a phase rotation, a phase offset, or a phase ramp is applied to at least a portion of a second set of sub-carrier of a wideband channel. The first sub-PPDU is transmitted on a first set of sub-carriers of the wideband channel and the second sub-PPDU is transmitted on the second set of sub-carriers of the wideband channel.

公开(公告)号：US20240080146A1

公开(公告)日：2024-03-07

申请号：US18507457

申请日：2023-11-13

Applicant: QUALCOMM Incorporated

Inventor： George Cherian ,  Alfred Asterjadhi ,  Abhishek Pramod Patil ,  Bin Tian ,  Sameer Vermani

IPC: H04L5/00 ,  H04B17/318 ,  H04W52/40 ,  H04W72/27 ,  H04W72/541

CPC classification number: H04L5/0032 ,  H04B17/318 ,  H04W52/40 ,  H04W72/27 ,  H04W72/541 ,  H04W84/12

Abstract: This disclosure provides systems, devices, apparatus, and methods, including computer programs encoded on storage media, for preventing or reducing cross-network interference associated with a coordinated transmission on a wireless channel. A first access point (AP) of a first basic service set (BSS) and a second AP of a second BSS can concurrently use the wireless channel using a coordinated transmission during a portion of a transmission opportunity (TXOP). The TXOP owner (such as the first AP) may allocate a resource assignment to the second AP such that the resource assignment is conditionally available for use by the second AP in a coordinated transmission. The condition may prevent the resource assignment from being used by the second BSS when its use would cause interference to the first BSS. The condition may be based on a transmit power for downlink communication or uplink communication in the second BSS.

公开(公告)号：US11888770B2

公开(公告)日：2024-01-30

申请号：US17196557

申请日：2021-03-09

Applicant: QUALCOMM Incorporated

Inventor： Lin Yang ,  Bin Tian

IPC: H04L5/00 ,  H04W72/0453

CPC classification number: H04L5/0044 ,  H04W72/0453 ,  H04L5/0007

Abstract: This disclosure provides systems, methods, and apparatuses for wireless communication. An example apparatus selects a first resource unit (RU) of a plurality of RUs for transmitting a physical (PHY) layer convergence protocol (PLCP) protocol data unit (PPDU) over a wireless medium. The first RU may include a set of contiguous tones occupying a first frequency bandwidth. The plurality of RUs may collectively span a second frequency bandwidth greater than the first frequency bandwidth. The apparatus maps the set of contiguous tones of the first RU to a set of non-contiguous tones distributed across the second frequency bandwidth using a tone mapping vector and a tone mapping offset associated with the first RU. The apparatus transmits the PPDU over the set of non-contiguous tones distributed across the second frequency bandwidth.

公开(公告)号：US20230412325A1

公开(公告)日：2023-12-21

申请号：US17843747

申请日：2022-06-17

Applicant: QUALCOMM Incorporated

Inventor： Lin Yang ,  Bin Tian ,  Youhan Kim ,  Jialing Li Chen

IPC: H04L5/00

CPC classification number: H04L5/0007 ,  H04L5/0048 ,  H04L5/0098 ,  H04L5/0066

Abstract: This disclosure provides methods, devices and systems for reducing PAPR in wireless communications. Some implementations more specifically relate to single-carrier frequency-division multiplexing (SC-FDM) techniques that can be used for wireless communications in wireless local area networks (WLANs). In some aspects, a wireless communication device may modulate a physical layer convergence protocol (PLCP) protocol data unit (PPDU) as a series of symbols in the time domain and may transform a subset of the time-domain symbols into a number (Q) of frequency-domain samples based on a Q-point discrete Fourier transform (DFT). The wireless communication device maps the Q frequency-domain samples to a number (N) of orthogonal subcarriers (representing an orthogonal frequency-division multiplexing (OFDM) symbol), where N>Q, and transforms the N subcarriers into N time-domain samples, based on an inverse fast Fourier transform (IFFT), for transmission over a wireless channel.