公开(公告)号：US12120206B2

公开(公告)日：2024-10-15

申请号：US16989324

申请日：2020-08-10

Applicant: NXP USA, INC.

Inventor： Sudhir Srinivasa ,  Hongyuan Zhang

IPC: H04L69/22 ,  H04L1/00 ,  H04L1/06 ,  H04L5/00 ,  H04L27/00 ,  H04W28/18 ,  H04W84/12

CPC classification number: H04L69/22 ,  H04L1/0056 ,  H04L1/007 ,  H04L1/0625 ,  H04L5/00 ,  H04L27/00 ,  H04L1/0057 ,  H04L1/0059 ,  H04L1/0068 ,  H04W28/18 ,  H04W84/12

Abstract: In a method for generating a physical layer (PHY) data unit for transmission via a communication channel, information bits to be included in the PHY data unit are received. A number of padding bits are added to the information bits. The number of padding bits is determined based on respective virtual values of each of one or more encoding parameters. The information bits are parsed to a number of encoders and are encoded, using the number of encoders, to generate coded bits. The coded bits are padded such that padded coded bits correspond to respective true values of each of the one or more encoding parameters. The PHY data unit is generated to include the padded coded bits.

公开(公告)号：US20240340026A1

公开(公告)日：2024-10-10

申请号：US18629795

申请日：2024-04-08

Applicant: NXP USA, Inc.

Inventor： Amer Al-Baidhani ,  Yan Zhang ,  Rui Cao ,  Sudhir Srinivasa ,  Hongyuan Zhang

IPC: H03M13/25 ,  H04L1/00 ,  H04L5/00 ,  H04W84/12

CPC classification number: H03M13/255 ,  H04L1/0008 ,  H04L5/0007 ,  H04W84/12

Abstract: Embodiments of a method and apparatus for wireless communications are disclosed. In an embodiment, a wireless device includes a controller configured to generate a control signal and a wireless transceiver configured to, in response the control signal, perform a low-density parity-check (LDPC) encoding operation to generate an encoded data unit with extra LDPC symbol segments.

公开(公告)号：US20240171238A1

公开(公告)日：2024-05-23

申请号：US18512796

申请日：2023-11-17

Applicant: NXP USA, Inc.

Inventor： Sayak Roy ,  Ankit Sethi ,  Sudhir Srinivasa

IPC: H04B7/06 ,  H04L5/00

CPC classification number: H04B7/0617 ,  H04B7/0634 ,  H04L5/0048 ,  H04W84/12

Abstract: One example discloses a method for beamforming feedback reduction in a WLAN (wireless local area network), including: generating a per-tone beamforming feedback matrix by vectorizing a set of steering vectors using vectorization based dimension reduction (DR-Vec); performing lossy compression on the vectors; reducing the per-tone beamforming feedback matrix to one vector; and generating per-tone beamforming angle information using only the one vector.

公开(公告)号：US20240106502A1

公开(公告)日：2024-03-28

申请号：US18053401

申请日：2022-11-08

Applicant: NXP USA, Inc.

Inventor： Sayak Roy ,  Ankit Sethi ,  Sudhir Srinivasa

IPC: H04B7/0456

CPC classification number: H04B7/0456

Abstract: A beamformee receives a channel coefficient matrix H of a wireless communication channel between a beamformer and the beamformee. The channel coefficient matrix is a 2×N complex matrix having two rows corresponding to two antenna of the beamformee and N columns corresponding to N antenna of the beamformer. A real symmetric matrix M is determined based on the matrix H followed by determining eigenvalues and eigenvectors of matrix M. Singular vectors of the matrix H based on the eigenvectors are determined where the singular vectors define a steering matrix. The steering matrix is transmitted to a beamformer, wherein a beam is steered by the beamformer to the beamformee based on the steering matrix.

公开(公告)号：US11937230B2

公开(公告)日：2024-03-19

申请号：US17349809

申请日：2021-06-16

Applicant: NXP USA, Inc.

Inventor： Rui Cao ,  Hongyuan Zhang ,  Yan Zhang ,  Liwen Chu ,  Hari Ram Balakrishnan ,  Sudhir Srinivasa

IPC: H04W4/00 ,  H04L5/00 ,  H04W72/0453 ,  H04W72/1263

CPC classification number: H04W72/1263 ,  H04L5/001 ,  H04W72/0453

Abstract: Embodiments of a method and an apparatus for wireless communications are disclosed. In an embodiment, a method for wireless communications involves generating a Physical Layer Protocol Data Unit (PPDU) that includes a resource unit (RU), wherein a size of the RU is less than a signal bandwidth and wherein data corresponding to the RU is distributed onto a disjoint set of subcarriers included in a frequency unit, and transmitting the PPDU using the disjoint set of subcarriers in accordance with a power spectrum density (PSD) limit.

公开(公告)号：US20240015059A1

公开(公告)日：2024-01-11

申请号：US18347769

申请日：2023-07-06

Applicant: NXP USA, Inc.

Inventor： Hari Ram Balakrishnan ,  Sudhir Srinivasa ,  Rui Cao ,  Hongyuan Zhang ,  Sergey Timofeev ,  Rong Zhang ,  Priyanka Bansal

IPC: H04L27/26 ,  H04L27/20 ,  H04L5/00

CPC classification number: H04L27/26132 ,  H04L27/2085 ,  H04L5/0007

Abstract: A method and system for generating an extended range (ER) physical layer protocol data unit (PPDU) is disclosed. The PPDU has a legacy portion of the ER PPDU which comprises one or more of a legacy short training field (L-STF), a legacy long training field (L-LTF), and a universal signaling (U-SIG) field and an ER portion of the ER PPDU which is appended to the legacy portion. The ER portion comprises one or more repetitions of a ER short training field (ER-STF), a ER long training field (ER-LTF), a ER-signal (ER-SIG) field, and a ER data field. In an example, signals indicative of the one or more repetitions for a same field are combined by a receiver to increase a signal to noise ratio of a field.

公开(公告)号：US20230309068A1

公开(公告)日：2023-09-28

申请号：US17655979

申请日：2022-03-22

Applicant: NXP USA, Inc.

Inventor： Hongyuan Zhang ,  Sudhir Srinivasa ,  Ken Kinwah Ho ,  Timothy J. Donovan ,  Foo Keong Tang ,  Liwen Chu

IPC: H04W72/04

CPC classification number: H04W72/0446 ,  H04W72/042 ,  H04W88/08

Abstract: One example discloses a wireless Access Point (AP) device, within a wireless local area network (WLAN), including: a controller configured to generate a reserve slot time trigger frame to a selected set of wireless devices; wherein the controller is configured to be coupled to an antenna; wherein the antenna is configured to transmit the reserve slot time trigger frame over a physical media to the selected set of user station devices (STAs) and exchange traffic with the selected set of STAs over the physical media; wherein the reserve slot time trigger frame is configured to reserve a slot time on the physical media; and wherein the controller is configured to transmit a burst of downlink (DL) traffic from the AP device during the slot time.

公开(公告)号：US11722354B2

公开(公告)日：2023-08-08

申请号：US17386242

申请日：2021-07-27

Applicant: NXP USA, Inc.

Inventor： Rui Cao ,  Sudhir Srinivasa ,  Hongyuan Zhang ,  Liwen Chu

IPC: H04L27/34 ,  H04W28/06

CPC classification number: H04L27/3461 ,  H04W28/06

Abstract: In an 802.11be wireless system, a receiving station device signals a packet padding capability in a wireless area network in accordance with an Extremely High Throughput (EHT) communication protocol by constructing a MAC control management frame to include an EHT capability element indicating whether a packet extension value longer than 16 μs is supported by the receiving station device, where one or more fields in the EHT capability element include (1) a common nominal packet padding field having a plurality of values to signal different packet extension values for use with all transmission constellations, spatial streams Nss, and resource unit (RU) allocations supported by the first STA device, including at least one packet extension value longer than 16 μs; and/or (2) a PHY packet extension threshold (PPET) field comprising a plurality of PPET values to signal packet extension values including at least one packet extension value longer than 16 μs.

公开(公告)号：US11711828B2

公开(公告)日：2023-07-25

申请号：US17229340

申请日：2021-04-13

Applicant: NXP USA, INC.

Inventor： Young Hoon Kwon ,  Liwen Chu ,  Sudhir Srinivasa ,  Hongyuan Zhang ,  Rui Cao

IPC: H04W72/02 ,  H04W72/51 ,  H04L5/00 ,  H04W72/23

CPC classification number: H04W72/51 ,  H04L5/0092 ,  H04W72/23

Abstract: Communications may be effected in a communications environment involving a plurality channels having disparate bandwidth and channel center frequency indexes. Communications are effected using first communications type with a first channel bandwidth and first channel center frequency index. Communications are also effected via a second communications type using a separate set of fields indicating a second channel bandwidth and a second channel center frequency index, the second channel bandwidth being different than the first channel bandwidth and the second channel center frequency index being different than the first channel center frequency index. The channel center frequency index and bandwidth communicated in each communication may utilize separate subfields.

公开(公告)号：US11711804B2

公开(公告)日：2023-07-25

申请号：US16551948

申请日：2019-08-27

Applicant: NXP USA, Inc.

Inventor： Ankit Sethi ,  Sudhir Srinivasa ,  Sayak Roy ,  B Hari Ram

IPC: H04W72/1273 ,  H04W74/00 ,  H04W16/28 ,  H04L25/02 ,  H04W88/08 ,  H04W84/12

CPC classification number: H04W72/1273 ,  H04L25/0224 ,  H04W16/28 ,  H04W74/004 ,  H04W84/12 ,  H04W88/08

Abstract: A WLAN AP includes an array of antennas, a transceiver and a processor. The transceiver is configured to transmit via the array of antennas downlink packets to WLAN STAs, and to receive uplink packets from the STAs. The processor is coupled to the transceiver and is configured to send a request to a plurality of the STAs to transmit a respective plurality of channel-sounding packets corresponding to the plurality of STAs, to receive the plurality of channel-sounding packets from the plurality of STAs in response to the request, to compute, based on the received plurality of channel-sounding packets, a beamforming matrix that defines subsequent transmission beams aimed toward at least a subset of the plurality of STAs, and to transmit one or more downlink data packets to one or more of the STAs via the array of antennas, in accordance with the beamforming matrix.