Patents by Inventor Ming Jia

Ming Jia 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).

  • Pilot symbol patterns for transmission through a plurality of antennas
    Patent number: 10348542
    Abstract: A method and apparatus for improving channel estimation within an OFDM communication system. Channel estimation in OFDM is usually performed with the aid of pilot symbols. The pilot symbols are typically spaced in time and frequency. The set of frequencies and times at which pilot symbols are inserted is referred to as a pilot pattern. In some cases, the pilot pattern is a diagonal-shaped lattice, either regular or irregular. The method first interpolates in the direction of larger coherence (time or frequency). Using these measurements, the density of pilot symbols in the direction of faster change will be increased thereby improving channel estimation without increasing overhead. As such, the results of the first interpolating step can then be used to assist the interpolation in the dimension of smaller coherence (time or frequency).
    Type: Grant
    Filed: January 23, 2019
    Date of Patent: July 9, 2019
    Assignee: Apple Inc.
    Inventors: Jianglei Ma, Ming Jia, Wen Tong, Peiying Zhu, Hang Zhang, Hua Xu, Dongsheng Yu
  • Multimedia broadcast multicast service (MBMS) utilizing spatial multiplexing
    Patent number: 10349229
    Abstract: Systems and methods are disclosed herein for an enhanced Multimedia Broadcast Multicast Service (MBMS) in a wireless communications network. In one embodiment, a number of base stations in a MBMS zone, or broadcast region, accommodate both Spatial Multiplexing (SM) enabled user elements and non-SM enabled user elements. In another embodiment, a number of base stations form a MBMS zone, or broadcast region, where the MBMS zone is sub-divided into an SM zone and a non-SM zone. In another embodiment, the wireless communications network includes multiple MBMS zones. For each MBMS zone, base stations serving the MBMS zone transmit an MBMS zone identifier (ID) for the MBMS zone. The MBMS zone ID may be used by a user element for decoding and/or to determine when to perform a handoff from one MBMS zone to another.
    Type: Grant
    Filed: October 11, 2017
    Date of Patent: July 9, 2019
    Assignee: Apple Inc.
    Inventors: Jianglei Ma, Aaron Callard, Ming Jia, Wen Tong, Peiying Zhu, Hang Zhang
  • Wireless feedback system and method
    Patent number: 10340990
    Abstract: A codebook C is provided in a MIMO transmitter as well as a MIMO receiver. The codebook C will include M codewords ci, where i is a unique codeword index for each codeword ci. Each codeword defines weighting factors to apply to the MIMO signals, and may correspond to channel matrices or vectors to apply to the MIMO signals prior to transmission from the respective antennas of the MIMO transmitter. The present invention creates codeword subsets Si for each codeword ci of the codebook C. Each codeword subset Si defines L codewords cj, which are selected from all the codewords ci in the codebook C. The codewords cj in a codeword subset Si are the L codewords in the entire codebook that best correlate with the corresponding codeword ci.
    Type: Grant
    Filed: July 30, 2018
    Date of Patent: July 2, 2019
    Assignee: Apple Inc.
    Inventors: Wen Tong, Hosein Nikopour, Amir Khandani, Hua Xu, Ming Jia, Peiying Zhu, Dong-sheng Yu
  • METHODS FOR CONFIGURABLE NON-ORTHOGONAL MULTIPLE ACCESS TRANSMISSION
    Publication number: 20190190753
    Abstract: Aspects of the present disclosure provide a scheme for generating a multiple access (MA) signal that include mapping each of at least one stream of bits to generate a set of modulated symbols and transmitting the set of modulated symbols. The spreading signatures that are selected to map the at least one stream of bits are selected, at least in part, based on a set of compatibility rules. The spreading involves mapping each stream of bits using a respective spreading signature from a set of spreading signatures to generate a respective set of modulated symbols, wherein real spreading signature components of the spreading signatures are orthogonal to each other and imaginary spreading signature components of the spreading signatures are orthogonal to each other.
    Type: Application
    Filed: December 15, 2017
    Publication date: June 20, 2019
    Applicant: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: ALIREZA BAYESTEH, MING JIA, SANJEEWA HERATH, JIANGLEI MA
  • System and method for machine-type communications
    Patent number: 10327122
    Abstract: A method for operating a machine-type device (MTD) includes determining communications requirements for a machine-type device (MTD), and assigning a first signal waveform selected from a plurality of signal waveforms to the MTD in accordance with the determined communications requirements, wherein each signal waveform has an associated characteristic signal bandwidth.
    Type: Grant
    Filed: May 19, 2017
    Date of Patent: June 18, 2019
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Yu Cao, Javad Abdoli, Ming Jia, Jianglei Ma
  • METHOD AND SYSTEM FOR LOW DATA RATE TRANSMISSION
    Publication number: 20190182307
    Abstract: Methods and devices are disclosed for encoding and transmitting data sequences for low data rate applications. An encoded data sequence is transformed and used to shape a multi-carrier pulse to create a narrow-band signal for transmission. Time domain tails of the narrow-band signal may be removed to decrease overhead. The data may be first encoded to create a sparse modulated data sequence. Multi-carrier pulse shaping may be carried out using frequency division multiplexing (FDM) or filter bank multi-carrier (FBMC) techniques. Alternatively, single carrier pulse shaping may be used to create the narrow-band signal.
    Type: Application
    Filed: February 21, 2019
    Publication date: June 13, 2019
    Inventors: Javad Abdoli, Jianglei Ma, Ming Jia
  • Preambles in OFDMA System
    Publication number: 20190173722
    Abstract: The present invention provides a preamble that is inserted into an OFDMA frame and has a common sequence for all the base stations participating in a transmission. The subscriber station performs fine synchronization using the common sequence on the common preamble, and the resulting peaks will provide the locations of candidate base stations. The base station specific search is then performed in the vicinities of those peaks by using base station specific pseudo-noise sequences. With this two stage cell search, the searching window is drastically reduced. The preamble is matched to known values by a respective receiver to decode the signals and permit multiple signals to be transferred from the transmitter to the receiver. The preamble may comprise two parts, Preamble-I and Preamble-2, which may be used in different systems, including multioutput, multi-input (MIMO) systems.
    Type: Application
    Filed: January 16, 2019
    Publication date: June 6, 2019
    Inventors: Jianglei Ma, Hang Zhang, Wen Tong, Ming Jia, Peiying Zhu, Mo-Han Fong
  • Method and System for Combining DFT-Transformed OFDM and Non-Transformed OFDM
    Publication number: 20190173701
    Abstract: Methods and systems are provided that enable an OFDM transmitter to be used for transmitting conventional OFDM or a form of transformed OFDM. A technique is provided for transforming a coded and modulated sequence of samples prior to an IFFT that enables the transformed sequence of samples to be transmitted using conventional OFDM or transformed OFDM. The selection of a transform function for transforming the coded and modulated sequence of samples may be based on optimizing the transform function for particular operating conditions between the transmitter and receiver. In some embodiments of the invention OFDM and time transformed OFDM are multiplexed in time and/or frequency in a transmission frame. In some embodiments of the invention a pilot pattern is provided in which the pilot are sent using OFDM and data is sent using OFDM and/or transformed OFDM.
    Type: Application
    Filed: February 12, 2019
    Publication date: June 6, 2019
    Inventors: Jianglei Ma, Wen Tong, Ming Jia, Hua Xu, Peiying Zhu, Hang Zhang
  • SIGNAL TRANSMISSION METHOD AND APPARATUS
    Publication number: 20190165907
    Abstract: Embodiments of this application provide a signal transmission method and apparatus, and the method includes: filtering a first time domain orthogonal frequency division multiplexing (OFDM) signal at each of M spatial transmission layers, where M is an integer greater than or equal to 1; performing spatial precoding on the filtered first time domain OFDM signal at each of the M spatial transmission layers, and mapping the filtered first time domain OFDM signal at each of the M spatial transmission layers to each of Nt transmit antenna ports, where Nt is an integer greater than or equal to M; and superposing and transmitting the first time domain OFDM signals that are at the M spatial transmission layers and that are mapped to all the Nt transmit antenna ports.
    Type: Application
    Filed: February 1, 2019
    Publication date: May 30, 2019
    Inventors: Jing QIU, Ming JIA, Jianglei MA
  • System and Method for Downlink Channel Sounding in Wireless Communications Systems
    Publication number: 20190165845
    Abstract: In accordance with an embodiment, a method of operating a base station configured to communicate with at least one user device includes transmitting a reference signal to the at least one user device, receiving channel quality information from the at least one user device, and forming a beam based on the channel quality information received from the at least one user device.
    Type: Application
    Filed: February 1, 2019
    Publication date: May 30, 2019
    Inventors: Jianglei Ma, Peiying Zhu, Wen Tong, Ming Jia
  • Multi-user MIMO systems and methods
    Patent number: 10306658
    Abstract: A method and system are provided for scheduling data transmission in a Multiple-Input Multiple-Output (MIMO) system. The MIMO system may comprise at least one MIMO transmitter and at least one MIMO receiver. Feedback from one or more receivers may be used by a transmitter to improve quality, capacity, and scheduling in MIMO communication systems. The method may include generating or receiving information pertaining to a MIMO channel metric and information pertaining to a Channel Quality Indicator (CQI) in respect of a transmitted signal; and sending a next transmission to a receiver using a MIMO mode selected in accordance with the information pertaining to the MIMO channel metric, and an adaptive coding and modulation selected in accordance with the information pertaining to the CQI.
    Type: Grant
    Filed: January 26, 2018
    Date of Patent: May 28, 2019
    Assignee: BlackBerry Limited
    Inventors: Wen Tong, Ming Jia, Jianming Wu, Dong-Sheng Yu, Peiying Zhu
  • Frame structure for filter bank multi-carrier (FBMC) waveforms
    Patent number: 10305645
    Abstract: A unified frame structure for filter bank multi-carrier (FBMC) and orthogonal frequency division multiplexed (OFDM) waveforms may allow FBMC and OFDM frames to be communicated over a common channel without significant inter-frame gaps. The unified frame structure may set an FBMC frame duration to an integer multiple of an OFDM frame element duration to enable alignment of FBMC frames and OFDM frames in the time domain. The unified frame structure may also map control channels in the FBMC and OFDM frames to common resource locations so that the respective control channels are aligned in the time and/or frequency domains. The unified frame structure may also share synchronization channels between FBMC and OFDM frames. Additionally, overhead in an FBMC time division duplexed (TDD) communications channel can be reduced by overlapping time windows appended to FBMC blocks.
    Type: Grant
    Filed: November 13, 2017
    Date of Patent: May 28, 2019
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Javad Abdoli, Ming Jia, Jianglei Ma
  • Pilot Symbol Patterns for Transmission through a Plurality of Antennas
    Publication number: 20190158328
    Abstract: A method and apparatus for improving channel estimation within an OFDM communication system. Channel estimation in OFDM is usually performed with the aid of pilot symbols. The pilot symbols are typically spaced in time and frequency. The set of frequencies and times at which pilot symbols are inserted is referred to as a pilot pattern. In some cases, the pilot pattern is a diagonal-shaped lattice, either regular or irregular. The method first interpolates in the direction of larger coherence (time or frequency). Using these measurements, the density of pilot symbols in the direction of faster change will be increased thereby improving channel estimation without increasing overhead. As such, the results of the first interpolating step can then be used to assist the interpolation in the dimension of smaller coherence (time or frequency).
    Type: Application
    Filed: January 23, 2019
    Publication date: May 23, 2019
    Inventors: Jianglei Ma, Ming Jia, Wen Tong, Peiying Zhu, Hang Zhang, Hua Xu, Dongsheng Yu
  • METHOD AND SYSTEM FOR SYMBOL SEQUENCE GENERATION AND TRANSMISSION FOR NON-ORTHOGONAL MULTIPLE ACCESS TRANSMISSION
    Publication number: 20190158338
    Abstract: Methods and systems are disclosed for symbol sequence generation and transmission for non-orthogonal multiple access (NoMA) transmission. A NoMA signal may be generated based on: (1) a first symbol sequence, the first symbol sequence determined from a set of input bits and associated with a first MA signature within a first MA signature space; (2) a second symbol sequence determined based on the first symbol sequence, the second symbol sequence being associated with a second MA signature within a second MA signature space; and (3) a symbol-to-resource element mapping applied to the second symbol sequence to produce the NoMA signal.
    Type: Application
    Filed: November 23, 2017
    Publication date: May 23, 2019
    Applicant: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: SANJEEWA HERATH, ALIREZA BAYESTEH, MING JIA, JIANGLEI MA, PEIYING ZHU, WEN TONG
  • SYSTEM AND METHOD FOR BIT MAPPING IN MULTIPLE ACCESS
    Publication number: 20190140779
    Abstract: Methods of transmitting and receiving a set of bits are provided. In the transmitting method, some of the bits are mapped to modulated symbol, and some of the bits map to a subset of transmission resources out of a first set of transmission resources. The modulated symbol is transmitted using the subset of transmission resources. At the receiver, a modulated symbol is received using a subset of transmission resources. Some bits are recovered by demodulating the demodulated symbol, and some of the bits are recovered based on the subset of transmission resources over which the modulated symbol was received.
    Type: Application
    Filed: January 12, 2018
    Publication date: May 9, 2019
    Applicant: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: MING JIA, JIANGLEI MA, SANJEEWA HERATH, ALIREZA BAYESTEH
  • Methods and systems for OFDM using code division multiplexing
    Patent number: 10284322
    Abstract: In some embodiments of the invention, OFDM symbols are transmitted as a plurality of clusters. A cluster includes a plurality of OFDM sub-carriers in frequency, over a plurality of OFDM symbol durations in time. Each cluster includes data as well as pilot information as a reference signal for channel estimation. In some embodiments, a plurality of clusters collectively occupy the available sub-carrier set in the frequency domain that is used for transmission. In some embodiments of the invention data and/or pilots are spread within each cluster using code division multiplexing (CDM). In some embodiments pilots and data are separated by distributing data on a particular number of the plurality of OFDM symbol durations and pilots on a remainder of the OFDM symbol durations. CDM spreading can be performed in time and/or frequency directions.
    Type: Grant
    Filed: July 10, 2018
    Date of Patent: May 7, 2019
    Assignee: Apple Inc.
    Inventors: Jianglei Ma, Ming Jia, Wen Tong, Peiying Zhu, Hua Xu, Hang Zhang, Mo-Han Fong
  • Methods and systems for orthogonal frequency division multiplexing (OFDM) multiple zone partitioning
    Patent number: 10277374
    Abstract: Aspects of the invention include methods and devices for inserting data and pilot symbols into Orthogonal Frequency Division Multiplexing (OFDM) frames having a time domain and a frequency domain. A method involves inserting in at least one zone of a first type a two dimensional array of data and pilot symbols in time and frequency and inserting in at least one zone of a second type a two dimensional array of data and pilot symbols in time and frequency. In some implementations the zone of the first type comprises common pilot symbols that can be detected by all receivers receiving the OFDM frame. In some implementations the zone of the second type comprises dedicated pilot symbols that are only detectable by a receiver that is aware of pre-processing used to encode the dedicated pilot symbols.
    Type: Grant
    Filed: November 8, 2017
    Date of Patent: April 30, 2019
    Assignee: Apple Inc.
    Inventors: Jianglei Ma, Ming Jia, Wen Tong, Peiying Zhu, Hang Zhang, Mo-Han Fong
  • Scattered Pilot Pattern And Channel Estimation Method For MIMO-OFDM Systems
    Publication number: 20190123949
    Abstract: A method and apparatus are provided for reducing the number of pilot symbols within a MIMO-OFDM communication system, and for improving channel estimation within such a system. For each transmitting antenna in an OFDM transmitter, pilot symbols are encoded so as to be unique to the transmitting antenna. The encoded pilot symbols are then inserted into an OFDM frame to form a diamond lattice, the diamond lattices for the different transmitting antennae using the same frequencies but being offset from each other by a single symbol in the time domain. At the OFDM receiver, a channel response is estimated for a symbol central to each diamond of the diamond lattice using a two-dimensional interpolation. The estimated channel responses are smoothed in the frequency domain. The channel responses of remaining symbols are then estimated by interpolation in the frequency domain.
    Type: Application
    Filed: October 29, 2018
    Publication date: April 25, 2019
    Applicant: BlackBerry Limited
    Inventors: Peiying Zhu, Wen Tong, Jianglei MA, Ming Jia
  • SYSTEMS AND METHODS FOR PARTIAL COLLISION MULTIPLE ACCESS
    Publication number: 20190123865
    Abstract: Methods, devices and systems for encoding and transmitting data in a wireless communications system and, in particular, for unscheduled data transmissions including low data rate transmissions. The method for transmitting data in a wireless network includes mapping data according to a predefined sequence pattern from a group of sequence patterns to provide a spreading sequence that includes multiple non-zero elements and that is enabled to partially collide in the wireless network with other spreading sequences that have been mapped according to other sequence patterns from the group; and transmitting the spreading sequence. Multiple sequences may be received by a network node and decoded using successive interference cancellation (SIC) techniques.
    Type: Application
    Filed: December 17, 2018
    Publication date: April 25, 2019
    Inventors: Ming Jia, Jianglei Ma, Javad Abdoli
  • Method and system for allocating media access control layer resources in a wireless communication environment
    Patent number: 10271310
    Abstract: A method and system for allocating shareable wireless transmission resources. A resource pool is established. The resource pool is divided into a plurality of physical layer allocation units usable for wirelessly transmitting control information and traffic data. The allocation units are assigned at the media access control layer for the wireless transmission of the control information and traffic data. The system and method of the present invention also allows mobile stations to be dynamically grouped into multicast groupings to reduce system overhead resource requirements.
    Type: Grant
    Filed: September 24, 2014
    Date of Patent: April 23, 2019
    Assignee: Apple Inc.
    Inventors: Hang Zhang, Jianglei Ma, Ming Jia, Mo-Han Fong, Peiying Zhu, Wen Tong