Patents by Inventor Sudhir Srinivasa

Sudhir Srinivasa has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20240291698
    Abstract: A wireless communication system, apparatus, and methodology are described for enabling wireless communication devices to generate extended range Physical Layer Protocol Data Units (PPDUs) for wireless transmission to a destination communication devices by generating, at a first wireless communication device, a data sequence in which a plurality of repeated data symbols are encoded for wireless transmission to the second communication device, and then applying a scrambling sequence that is known to the first and second communication devices to the data sequence to generate an output data sequence wherein the plurality of repeated data symbols are pseudo-randomized prior to performing an inverse Fourier transform on the output data sequence.
    Type: Application
    Filed: February 27, 2024
    Publication date: August 29, 2024
    Applicant: NXP USA, Inc.
    Inventors: Priyanka Bansal, Hari Ram Balakrishnan, Sudhir Srinivasa, Rui Cao
  • Patent number: 12068902
    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 ?s 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 ?s; 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 ?s.
    Type: Grant
    Filed: July 10, 2023
    Date of Patent: August 20, 2024
    Assignee: NXP USA, Inc.
    Inventors: Rui Cao, Sudhir Srinivasa, Hongyuan Zhang, Liwen Chu
  • Publication number: 20240251442
    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 trigger packet indicating that wireless access points (APs) can join coordinated transmission with the wireless device and a wireless transceiver configured to transmit the trigger packet to the wireless APs.
    Type: Application
    Filed: January 19, 2024
    Publication date: July 25, 2024
    Inventors: Hari Ram Balakrishnan, Sudhir Srinivasa
  • Patent number: 12041577
    Abstract: A first client station receives from an access point an indication of whether angular information is to be included in feedback information in a range measurement session. The first client station transmits a null data packet (NDP) as part of an uplink multi-user (MU) PHY transmission that also includes simultaneous transmissions by one or more second client stations of one or more other respective NDPs to the access point as part of the range measurement session. The first client station receives a downlink physical layer (PHY) data unit from the access point that includes respective downlink feedback frames for the first client station and the one or more second client stations. When angular information is to be included in the feedback, a downlink feedback frame for the first client station includes angular information.
    Type: Grant
    Filed: September 14, 2022
    Date of Patent: July 16, 2024
    Assignee: Marvell Asia Pte Ltd
    Inventors: Liwen Chu, Hongyuan Zhang, Christian R. Berger, Niranjan Grandhe, Sudhir Srinivasa, Hui-Ling Lou
  • Patent number: 12028149
    Abstract: A wireless network includes a client device and an access point (AP). The client device generates a data packet having a physical layer protocol data unit frame format. The client device transmits the data packet to the AP such that a plurality of long training fields (LTFs) of the data packet is transmitted at higher power as compared to a data field of the data packet, and a preamble portion of the data packet is transmitted at higher power as compared to the plurality of LTFs. Further, the data field includes various resource units (RUs) and one such RU is utilized for data transmission between the client device and the AP. The transmission of the data packet from the client device to the AP in the aforementioned manner results in the range extension of the wireless network.
    Type: Grant
    Filed: May 25, 2022
    Date of Patent: July 2, 2024
    Assignee: NXP USA, Inc.
    Inventors: Nilesh Nilkanth Khude, Sudhir Srinivasa, Hari Ram Balakrishnan, Ankit Sethi, Vijay Ahirwar
  • Publication number: 20240196423
    Abstract: An access point (AP) device that serves a wireless local area network (WLAN) determines that a coverage area of the AP device is partitioned into a plurality of sectors, the coverage area corresponding to the WLAN. The AP device determines that a first transmission is occurring within a first sector among the plurality of sectors, and determines that a client station is located in a second sector among the plurality of sectors, the second sector different than the first sector. In response to determining that the first transmission is occurring within the first sector, the AP device selects the client station for a directional second transmission in a direction i) within the second sector and ii) outside of the first sector, and transmits the directional second transmission to the client station in the second sector while the first transmission in the first sector is occurring.
    Type: Application
    Filed: February 22, 2024
    Publication date: June 13, 2024
    Inventors: B Hari RAM, Vijay AHIRWAR, Sri Varsha ROTTELA, Nilesh N. KHUDE, Sudhir SRINIVASA
  • Publication number: 20240171238
    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.
    Type: Application
    Filed: November 17, 2023
    Publication date: May 23, 2024
    Inventors: Sayak Roy, Ankit Sethi, Sudhir Srinivasa
  • Publication number: 20240171430
    Abstract: A multi-radio system comprises a first radio and a second radio co-located on the multi-radio system. The first radio is arranged to generate an RF transmit signal which is output by a first antenna of the first radio. In an example, the first radio comprises a radio frequency (RF) canceller arranged to output a RF cancellation signal which couples with the RF transmit signal received at a second antenna of the second radio. The RF cancellation signal that is output results in the cancellation of the RF transmit signal at the second antenna of the second radio.
    Type: Application
    Filed: January 11, 2023
    Publication date: May 23, 2024
    Inventors: Vijay Ahirwar, Nilesh Nilkanth Khude, Hari Ram Balakrishnan, Sudhir Srinivasa, Olivier Jerome Celestin Jamin
  • Publication number: 20240171254
    Abstract: Embodiments of an apparatus and method for wireless communications are disclosed. In an embodiment, a wireless device includes a controller configured to construct an orthogonal matrix, and a wireless transceiver configured to conduct wireless communications based on the orthogonal matrix. The size of the orthogonal matrix is 12×12 or 16×16.
    Type: Application
    Filed: November 21, 2023
    Publication date: May 23, 2024
    Inventors: Sayak Roy, Ankit Sethi, Sudhir Srinivasa, Rui Cao, Hongyuan Zhang
  • Patent number: 11985089
    Abstract: Various embodiments relate to a method of sounding a plurality of stations (STAs) with mixed operating bandwidths using a null data packet (NDP), wherein the bandwidth of the NDP is wider than the bandwidth of one STA, including: grouping STAs of mixed operating bandwidth in one sounding sequence by a beamformer; transmitting a null data packet announcement (NDPA) to the STAs, wherein the NDPA indicates the requested partial bandwidth channel feedback for each STA by the beamformer; transmitting the wide-bandwidth NDP to the STAs by the beamformer; transmitting beamforming report poll (BFRP) frame to the STAs to trigger uplink transmission of channel feedback reports by the beamformer; and receiving by the beamformer a partial bandwidth channel feedback within the STA's operating bandwidth from the STAs; receiving and parsing channel feedback reports from the STAs used for following steered OFDMA transmissions by the beamformer.
    Type: Grant
    Filed: October 6, 2021
    Date of Patent: May 14, 2024
    Assignee: NXP USA, Inc.
    Inventors: Rui Cao, Sudhir Srinivasa, Xiayu Zheng, Hongyuan Zhang
  • Publication number: 20240155682
    Abstract: Embodiments of a method and apparatus for wireless communications are disclosed. In an embodiment, a wireless device includes a controller configured to generate an extended range request-to-send (ER-RTS) packet and a wireless transceiver configured to transmit the ER-RTS packet to a second wireless device to reserve a transmission channel.
    Type: Application
    Filed: November 8, 2023
    Publication date: May 9, 2024
    Inventors: Priyanka Bansal, Hari Ram Balakrishnan, Rui Cao, Liwen Chu, Sudhir Srinivasa
  • Publication number: 20240106502
    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.
    Type: Application
    Filed: November 8, 2022
    Publication date: March 28, 2024
    Inventors: Sayak Roy, Ankit Sethi, Sudhir Srinivasa
  • Patent number: 11937230
    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.
    Type: Grant
    Filed: June 16, 2021
    Date of Patent: March 19, 2024
    Assignee: NXP USA, Inc.
    Inventors: Rui Cao, Hongyuan Zhang, Yan Zhang, Liwen Chu, Hari Ram Balakrishnan, Sudhir Srinivasa
  • Patent number: 11917670
    Abstract: A first communication device in a first WLAN determines a channel estimate of a communication channel between the first communication device and a second communication device in a second WLAN using measurements at the first communication device of a first transmission between the second communication device and a third communication device in the second WLAN. The first communication device generates a PPDU for transmission to a fourth communication device in the first WLAN, including: determining, using the channel estimate, a precoder matrix to use for transmitting the PPDU in the first WLAN, and generating the PPDU using the precoder matrix so that interference at the second communication device in the second WLAN caused by transmission of the PPDU by the first communication device in the first WLAN is reduced. The first communication device transmits the PPDU to the fourth communication device in the first WLAN as a directional second transmission.
    Type: Grant
    Filed: December 30, 2021
    Date of Patent: February 27, 2024
    Assignee: Marvell Asia Pte Ltd
    Inventors: B Hari Ram, Vijay Ahirwar, Sri Varsha Rottela, Nilesh N. Khude, Sudhir Srinivasa
  • Patent number: 11916624
    Abstract: A wireless network includes a networking device and various stations. The networking device determines an available bandwidth of each station of the wireless network. Further, the networking device assigns a bandwidth and at least one spatial stream to each station. The bandwidth assigned to each station is less than or equal to the available bandwidth of the corresponding station. Further, the bandwidth assigned to one station is different from and partially overlaps with the bandwidth assigned to another station. Similarly, the spatial stream assigned to one station is different from the spatial stream assigned to another station. The networking device generates a data packet indicative of the bandwidth and the spatial stream assigned to each station of the wireless network, and transmits the data packet to each station to enable multi-user multiple-input-multiple-output (MU-MIMO) communication between the networking device and the stations.
    Type: Grant
    Filed: December 15, 2021
    Date of Patent: February 27, 2024
    Assignee: NXP USA, Inc.
    Inventors: Ankit Sethi, Sayak Roy, Sudhir Srinivasa
  • Publication number: 20240022459
    Abstract: A method and system comprises receiving a signal over an air interface. A binary sequence is detected in the signal. A legacy signal (L-SIG) field of a physical layer protocol data circuit (PPDU) is decoded based on the detected binary sequence and based on decoding the L-SIG field, two spoofing symbols which directly follow the L-SIG field is checked in the PPDU, wherein the two spoofing symbols comprise binary phase shift keying (BPSK) symbols. Based a presence of the two spoofing symbols, a long range portion of the PPDU is processed; and based on an absence of the two spoofing symbols, the PPDU is processed as a legacy PPDU.
    Type: Application
    Filed: July 6, 2023
    Publication date: January 18, 2024
    Inventors: Hongyuan Zhang, Hari Ram Balakrishnan, Sudhir Srinivasa
  • Publication number: 20240015060
    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 ?s 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 ?s; 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 ?s.
    Type: Application
    Filed: July 10, 2023
    Publication date: January 11, 2024
    Inventors: Rui Cao, Sudhir Srinivasa, Hongyuan Zhang, Liwen Chu
  • Publication number: 20240015059
    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.
    Type: Application
    Filed: July 6, 2023
    Publication date: January 11, 2024
    Inventors: Hari Ram Balakrishnan, Sudhir Srinivasa, Rui Cao, Hongyuan Zhang, Sergey Timofeev, Rong Zhang, Priyanka Bansal
  • Publication number: 20230421295
    Abstract: A preamble of physical layer (PHY) data unit includes a first legacy portion and a first non-legacy portion that follows the first legacy portion. The first non-legacy portion includes i) a first orthogonal frequency division multiplexing (OFDM) symbol that immediately follows the first legacy portion and that is modulated using binary phase shift keying (BPSK), and ii) a second OFDM symbol that immediately follows the first OFDM symbol and that is modulated using BPSK modulation rotated by 90 degrees (Q-BPSK). The modulation of the first and second OFDM symbols indicates to a receiver device that conforms to a first communication protocol that the data unit conforms to the first communication protocol. The first OFDM symbol being modulated using BPSK modulation causes a receiver device that conforms to a second communication protocol to determine that the PHY data unit conforms to a third communication protocol.
    Type: Application
    Filed: September 11, 2023
    Publication date: December 28, 2023
    Inventors: Hongyuan ZHANG, Hui-Ling LOU, Rohit U. NABAR, Sudhir SRINIVASA, Mao YU, Raja BANERJEA
  • Publication number: 20230388002
    Abstract: A wireless network includes a client device and an access point (AP). The client device generates a data packet having a physical layer protocol data unit frame format. The client device transmits the data packet to the AP such that a plurality of long training fields (LTFs) of the data packet is transmitted at higher power as compared to a data field of the data packet, and a preamble portion of the data packet is transmitted at higher power as compared to the plurality of LTFs. Further, the data field includes various resource units (RUs) and one such RU is utilized for data transmission between the client device and the AP. The transmission of the data packet from the client device to the AP in the aforementioned manner results in the range extension of the wireless network.
    Type: Application
    Filed: May 25, 2022
    Publication date: November 30, 2023
    Inventors: Nilesh Nilkanth Khude, Sudhir Srinivasa, Hari Ram Balakrishnan, Ankit Sethi, Vijay Ahirwar