Patents by Inventor Mingguang Xu

Mingguang Xu 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).

  • Patent number: 10411937
    Abstract: A communication device generates a first portion of a physical layer (PHY) preamble of a PHY data unit to include a first plurality of orthogonal frequency division multiplexing (OFDM) symbols. Each OFDM symbol of the first plurality of OFDM symbols is generated with a first OFDM tone spacing. The communication device generate a second portion of the PHY preamble to include a second plurality of OFDM symbols. Each OFDM symbol of the second plurality of OFDM symbols is generated with a second OFDM tone spacing that is a fraction 1/N of the first OFDM tone spacing, where N is a positive integer greater than one. The communication device generates a PHY data portion of the PHY data unit to include one or more third OFDM symbols. Each third OFDM symbol is generated with the second OFDM tone spacing.
    Type: Grant
    Filed: March 29, 2019
    Date of Patent: September 10, 2019
    Assignee: Marvell World Trade Ltd.
    Inventors: Hongyuan Zhang, Yakun Sun, Mingguang Xu, Rui Cao, Hui-Ling Lou
  • Publication number: 20190268449
    Abstract: A first communication device generates a physical layer (PHY) preamble for a PHY data unit to be transmitted via a communication channel, the PHY data unit conforming to a first communication protocol. Generating the PHY preamble includes generating a legacy portion of the PHY preamble to include a legacy signal field, which is decodable by one or more second communication devices that conform to a second communication protocol to determine a duration of the PHY data unit. The PHY preamble is generated to also include a duplicate of the legacy signal field in the PHY preamble, wherein presence of the duplicate of the legacy signal field indicates to one or more third communication devices that conform to the first communication protocol that the PHY data unit conforms to the first communication protocol. The first communication device generates the PHY data unit to include the PHY preamble and a PHY payload.
    Type: Application
    Filed: May 13, 2019
    Publication date: August 29, 2019
    Inventors: Hongyuan ZHANG, Mingguang XU, Yakun SUN
  • Patent number: 10383054
    Abstract: Accordingly, systems and methods for managing power when the number of training and data tones are increased in a wireless communications system are provided. An L-SIG field is generated that includes a set of data and pilot tones, wherein the pilot tones are inserted between the data tones in the set of data and pilot tones. A plurality of training tones is added to the L-SIG field before and after the set of data and pilot tones. A symbol is generated that includes the L-SIG field, an L-LTF field, and a data field, wherein the training tones of the L-SIG field provide channel estimates for the data field. Power of the L-LTF field is managed relative to power of the L-SIG field in the generated symbol in a time domain.
    Type: Grant
    Filed: August 6, 2018
    Date of Patent: August 13, 2019
    Assignee: Marvell International Ltd.
    Inventors: Hongyuan Zhang, Mingguang Xu, Yakun Sun
  • Patent number: 10374840
    Abstract: Systems and techniques relating to repeated signal detection are described. A described system includes a receiver to receive a frame including first and second portions, the first portion including first and second signal fields; a detector to determine a first decision metric component based on a hypothesis that the second signal field is a repeated version of the first signal field, determine a second decision metric component based on a hypothesis that the second signal field is not the repeated version, and make a determination, based on the first and second decision metric components, of whether the second signal field is the repeated version; and a decoder to process the second portion in accordance with a first format if the second signal field is not the repeated version, and to decode the second portion in accordance with a second format if the second signal field is the repeated version.
    Type: Grant
    Filed: May 15, 2018
    Date of Patent: August 6, 2019
    Assignee: MARVELL INTERNATIONAL LTD.
    Inventors: Yakun Sun, Mingguang Xu, Hongyuan Zhang
  • Publication number: 20190229969
    Abstract: A communication device generates a first portion of a physical layer (PHY) preamble of a PHY data unit to include a first plurality of orthogonal frequency division multiplexing (OFDM) symbols. Each OFDM symbol of the first plurality of OFDM symbols is generated with a first OFDM tone spacing. The communication device generate a second portion of the PHY preamble to include a second plurality of OFDM symbols. Each OFDM symbol of the second plurality of OFDM symbols is generated with a second OFDM tone spacing that is a fraction 1/N of the first OFDM tone spacing, where N is a positive integer greater than one. The communication device generates a PHY data portion of the PHY data unit to include one or more third OFDM symbols. Each third OFDM symbol is generated with the second OFDM tone spacing.
    Type: Application
    Filed: March 29, 2019
    Publication date: July 25, 2019
    Inventors: Hongyuan ZHANG, Yakun SUN, Mingguang XU, Rui CAO, Hui-Ling LOU
  • Patent number: 10291752
    Abstract: A first communication device generates a physical layer (PHY) preamble for a PHY data unit to be transmitted via a communication channel, the PHY data unit conforming to a first communication protocol. Generating the PHY preamble includes generating a legacy portion of the PHY preamble to include a legacy signal field, which is decodable by one or more second communication devices that conform to a second communication protocol to determine a duration of the PHY data unit. The PHY preamble is generated to also include a duplicate of the legacy signal field in the PHY preamble, wherein presence of the duplicate of the legacy signal field indicates to one or more third communication devices that conform to the first communication protocol that the PHY data unit conforms to the first communication protocol. The first communication device generates the PHY data unit to include the PHY preamble and a PHY payload.
    Type: Grant
    Filed: October 19, 2017
    Date of Patent: May 14, 2019
    Assignee: Marvell World Trade Ltd.
    Inventors: Hongyuan Zhang, Mingguang Xu, Yakun Sun
  • Patent number: 10263735
    Abstract: For a first group of devices having a first group size, a set of block allocations is selected from a codebook. A block allocation for the first group of devices is selected from the selected set of block allocations. A corresponding integer number of different orthogonal frequency division multiplexing (OFDM) tone blocks is assigned to each device of the first group of devices according to the allocation. An orthogonal frequency division multiple access (OFDMA) data unit to be transmitted to the first group of devices via the WLAN communication channel is generated using the assigned set of OFDM tone blocks. The OFDMA data unit includes a preamble portion and a data portion, the preamble portion having an index to the codebook that indicates i) the first group size, and ii) the selected block allocation.
    Type: Grant
    Filed: October 28, 2016
    Date of Patent: April 16, 2019
    Assignee: Marvell International Ltd.
    Inventors: Yakun Sun, Mingguang Xu, Hongyuan Zhang, Liwen Chu, Lei Wang, Hui-Ling Lou, Jinjing Jiang
  • Patent number: 10257006
    Abstract: A communication device determines that an extension field should be included in physical layer (PHY) data unit to provide a receiver with more processing time to process data included in the PHY data unit, wherein the extension field is not required to be processed by the receiver. The communication device generates i) a PHY preamble of the PHY data unit, and ii) a PHY data portion of the PHY data unit, the PHY data unit conforming to a first communication protocol. Each orthogonal frequency division multiplexing (OFDM) symbol in the PHY data portion is generated with a first tone spacing, which is a fraction 1/N of a second tone spacing defined by a second communication protocol, wherein N is a positive integer greater than one. The communication device also generates the extension field of the PHY data unit, which is appended to an end of the PHY data portion.
    Type: Grant
    Filed: October 25, 2017
    Date of Patent: April 9, 2019
    Assignee: Marvell World Trade Ltd.
    Inventors: Hongyuan Zhang, Yakun Sun, Mingguang Xu, Rui Cao, Hui-Ling Lou
  • Publication number: 20190104523
    Abstract: A communication device associated with a first wireless communication network transmits an indication that a communication channel in an unlicensed frequency band is being utilized by the first wireless communication network. The indication is transmitted to an access point of a second wireless communication network. The first wireless communication network utilizes a first wireless communication protocol developed for use in licensed frequency bands, and the second wireless communication network utilizes a second wireless communication protocol developed for use in the unlicensed frequency band. The indication is transmitted by the communication device to prompt the access point of the second wireless communication network, to determine that i) the communication channel cannot be used by the second wireless communication network, or ii) the second wireless communication network is to temporarily yield the communication channel to the first wireless communication network.
    Type: Application
    Filed: November 5, 2018
    Publication date: April 4, 2019
    Inventors: Yakun SUN, Hongyuan ZHANG, Mingguang XU, Liwen CHU, Hui-Ling LOU
  • Publication number: 20190068418
    Abstract: A boundary within a last orthogonal frequency division multiplexing (OFDM) symbol of a PHY data unit is determined. Pre-encoder padding bits are added to a set of information bits to generate a set of padded information bits such that the set of padded information bits, after being encoded, fill one or more OFDM symbols up to the boundary within the last OFDM symbol. The set of padded information bits are encoded to generate a set of coded bits. A PHY preamble is generated to include a subfield that indicates the boundary. The one or more OFDM symbols are generated to include (i) the set of coded information bits in the one or more OFDM symbols up to the boundary to allow a receiving device to stop decoding the one or more OFDM symbols at the boundary, and (ii) post-encoder padding bits in the last OFDM symbol following the boundary.
    Type: Application
    Filed: October 25, 2018
    Publication date: February 28, 2019
    Inventors: Hongyuan ZHANG, Xiayu ZHENG, Rui CAO, Mingguang XU, Sudhir SRINIVASA, Jie HUANG
  • Patent number: 10218822
    Abstract: A first communication device generates a physical layer (PHY) preamble for a PHY data unit that conforms to a first communication protocol. A first portion of the PHY preamble is generated to include a first signal field having a length subfield that indicates a length of the PHY data unit, A second signal field is generated, and the second signal field and a duplicate of the second signal field are included in the PHY preamble. The PHY preamble is formatted such that the first portion of the PHY preamble is decodable by any second communication device that conforms to a second communication protocol, but does not conform to the first communication protocol, to determine a duration of the PHY data unit based on the length subfield in the first portion of the PHY preamble. The first communication device generates the PHY data unit to include the PHY preamble.
    Type: Grant
    Filed: February 5, 2016
    Date of Patent: February 26, 2019
    Assignee: Marvell World Trade Ltd.
    Inventors: Hongyuan Zhang, Yakun Sun, Mingguang Xu
  • Patent number: 10219162
    Abstract: A wireless device includes a first receiver configured to receive a first signal transmitted using a first communication protocol, and to generate at least one of first information based on a first portion of a first signal and second information based on a second portion of the first signal. The wireless device includes a second receiver configured to receive a second signal transmitted using a second communication protocol, to suppress at least a portion of interference from the first signal based on the first information in response to the first receiver generating only the first information, and to cancel interference from the first signal based on the first information and the second information in response to the first receiver generating the first information and the second information.
    Type: Grant
    Filed: February 23, 2017
    Date of Patent: February 26, 2019
    Assignee: Marvell International LTD.
    Inventors: Yakun Sun, Mingguang Xu, Hui-Ling Lou, Hongyuan Zhang, Yan Zhang, Liwen Chu, Jinjing Jiang
  • Publication number: 20190037549
    Abstract: Communicating wireless devices collaborate and utilize waveforms to enable secure channel estimation. To protect against a repetitive replay attack, some embodiments include Single Carrier Physical Layer (SC-PHY) waveforms and/or interpolated OFDM waveforms that do not include a repeatable or predictable structure. The waveforms are transmitted in ranging packet structures that are compatible with legacy 802.11 technologies that do not utilize secure channel estimation. The ranging packets are received in combination with the information previously exchanged to enable the receiving wireless system to securely determine a channel estimate (e.g., determine a channel estimate without an interloper transmission that is not an authentic first arrival path in a multi-path channel between the wireless systems). Thus, one or both of the wireless systems can estimate the distance between them (or range). Devices utilizing legacy 802.
    Type: Application
    Filed: March 27, 2018
    Publication date: January 31, 2019
    Applicant: Apple Inc.
    Inventors: Mingguang Xu, Su Khiong Yong, Mithat C. Dogan, Rohit U. Nabar, Qi Wang, Kyle C. Brogle, Andrew J. Ringer
  • Patent number: 10194006
    Abstract: In a method for generating a physical layer (PHY) data unit for transmission via a communication channel, the PHY data unit conforming to a first communication protocol, a first communication device generates a PHY preamble for the PHY data unit, including: generating a signal field, including the signal field and a duplicate of the signal field in the PHY preamble, and formatting the PHY preamble such that a first portion of the PHY preamble is decodable by a second communication device that conforms to a second communication protocol, but does not conform to the first communication protocol, to determine a duration of the PHY data unit based on the first portion of the PHY preamble. The first communication device generates the PHY data unit to include the PHY preamble and a PHY payload.
    Type: Grant
    Filed: January 7, 2015
    Date of Patent: January 29, 2019
    Assignee: Marvell World Trade Ltd.
    Inventors: Hongyuan Zhang, Mingguang Xu, Yakun Sun
  • Patent number: 10164729
    Abstract: A system including a direct current tone, guard tone, data tone allocation, mapping, and inverse Fourier transform (IFT) modules. The direct current tone module determines a number of direct current tones based on whether a network device is operating in a single user or multi-user mode. The guard tone module determines a number of guard tones based on whether the network device is operating in the single user or multi-user mode. The data tone allocation module determines a number of data tones based on the number of direct current and guard tones. The mapping module receives data and based on the number of data tones, maps the data to the data tones. The IFT module performs a frequency to time domain conversion of an output of the mapping module to generate orthogonal frequency division multiplexing (OFDM) symbols during the single user mode and OFDM access symbols during the multi-user mode.
    Type: Grant
    Filed: August 11, 2015
    Date of Patent: December 25, 2018
    Assignee: Marvell World Trade Ltd.
    Inventors: Hongyuan Zhang, Mingguang Xu, Yakun Sun
  • Publication number: 20180323919
    Abstract: A communication device generates a physical layer (PHY) preamble of a multi-user (MU) PHY data unit. The PHY preamble includes a first signal field, and a second signal field. The second signal field includes: a common field that includes a value, selected from a codebook, that indicates i) an allocation of frequency resources to one or more resource units, wherein each resource unit corresponds to a respective block of consecutive orthogonal frequency division multiplexing (OFDM) tones, and ii) a respective number of receiving devices assigned to each resource unit. The second signal field also includes a plurality of user-specific fields that indicate an allocation of the one or more resource units to the multiple receiving devices, wherein each user-specific field corresponds to a respective receiving device and includes i) an identifier of the respective receiving device, and ii) an indication of which one or more spatial streams are allocated to the respective receiving device.
    Type: Application
    Filed: July 16, 2018
    Publication date: November 8, 2018
    Inventors: Yakun SUN, Hongyuan ZHANG, Liwen CHU, Lei WANG, Jinjing JIANG, Mingguang XU
  • Patent number: 10123328
    Abstract: A communication device is configured to operate in a first wireless communication network that utilizes a communication protocol developed for use in frequency bands that are licensed by a government entity for wireless communication applications. The communication device determines whether one or more communication channels in an unlicensed frequency band are not being utilized by any second wireless communication networks, wherein the government entity does not require licenses to use the unlicensed frequency band. In response to determining that one or more communication channels in the unlicensed frequency band are not being utilized by any second wireless communication networks, the communication device selects a set of one or more communication channels in the one or more communication channels for use by the first wireless communication network, and utilizes the set of one or more communication channels for communications in the first wireless communication network.
    Type: Grant
    Filed: November 26, 2014
    Date of Patent: November 6, 2018
    Assignee: Marvell World Trade Ltd.
    Inventors: Yakun Sun, Hongyuan Zhang, Mingguang Xu, Liwen Chu, Hui-Ling Lou
  • Patent number: 10116477
    Abstract: A boundary within a last orthogonal frequency division multiplexing (OFDM) symbol of a PHY data unit is determined. Pre-encoder padding bits are added to a set of information bits to generate a set of padded information bits such that the set of padded information bits, after being encoded, fill one or more OFDM symbols up to the boundary within the last OFDM symbol. The set of padded information bits are encoded to generate a set of coded bits. A PHY preamble is generated to include a subfield that indicates the boundary. The one or more OFDM symbols are generated to include (i) the set of coded information bits in the one or more OFDM symbols up to the boundary to allow a receiving device to stop decoding the one or more OFDM symbols at the boundary, and (ii) post-encoder padding bits in the last OFDM symbol following the boundary.
    Type: Grant
    Filed: September 18, 2017
    Date of Patent: October 30, 2018
    Assignee: Marvell World Trade Ltd.
    Inventors: Hongyuan Zhang, Xiayu Zheng, Rui Cao, Mingguang Xu, Sudhir Srinivasa, Jie Huang
  • Patent number: 10079918
    Abstract: A communication device receives a plurality of information bits and determines a maximum number of information bits that can be encoded such that, after the plurality of information bits have been encoded using i) a forward error correction scheme, and ii) a block coding scheme, the block coded bits fit within a single orthogonal frequency division multiplex (OFDM) symbol. The maximum number of information bits is based on a number of repetitions of coded information bits by the block coding scheme, and a number of block coded bits for the maximum number of information bits is less than a number of data tones of the single OFDM symbol. The communication device encodes the plurality of information bits using the forward error correction scheme and the block coding scheme to generate block coded bits, and generates a physical layer data unit to include the block coded bits in the single OFDM symbol.
    Type: Grant
    Filed: February 17, 2016
    Date of Patent: September 18, 2018
    Assignee: Marvell World Trade Ltd.
    Inventors: Mingguang Xu, Yakun Sun, Hongyuan Zhang, Lei Wang, Hui-Ling Lou
  • Publication number: 20180248727
    Abstract: A physical layer (PHY) preamble of a PHY data unit is generated, including generating one or more short orthogonal frequency division multiplexing (OFDM) symbols for one or more long training fields of the PHY preamble. Each of the one or more short OFDM symbols corresponds to a frequency domain sequence having a number of tones. Every N-th tone is modulated and tones between modulated tones are zero tones, where N is a positive integer greater than one. A time duration of each short OFDM symbol is 1/N of a time duration of a full inverse discrete Fourier transform (IDFT) of the frequency domain sequence. A data portion of the PHY data unit is generated, including generating one or more long OFDM symbols. A time duration of each long OFDM symbol is greater than a time duration of each of the one or more short OFDM symbols.
    Type: Application
    Filed: April 23, 2018
    Publication date: August 30, 2018
    Inventors: Hongyuan ZHANG, Xiayu ZHENG, Rui CAO, Mingguang XU, Sudhir SRINIVASA, Jie HUANG