Patents by Inventor Dong-Sheng Yu

Dong-Sheng Yu 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: 8897384
    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: November 5, 2013
    Date of Patent: November 25, 2014
    Assignee: Apple Inc.
    Inventors: Wen Tong, Hosein Nikopourdeilami, IV, Amir Keyvam Khandani, Hua Xu, Ming Jia, Peiying Zhu, Dong-Sheng Yu
  • Patent number: 8879652
    Abstract: The description herein relates to pilot designs for an Orthogonal Frequency Division Multiplexing (OFDM) based communication system. In at least one embodiment, the communication system is one operating according to the IEEE 802.16m, or WiMax, standard. In general, an OFDM transmitter operates to insert pilot symbols into a resource of a transmit frame according to a predetermined staggered pilot symbol pattern defining pilot symbol locations within the resource of the transmit frame. The predetermined pilot symbol pattern is defined such that pilot symbols are located at or near time boundaries of the resource, at or near frequency boundaries of the resource, or both. By doing so, when generating a channel estimate for the communication channel between the OFDM transmitter and an OFDM receiver based on the pilot symbols, extrapolations needed to estimate the channel near the boundaries of the resource are optimized, thereby improving overall channel estimation accuracy.
    Type: Grant
    Filed: August 14, 2013
    Date of Patent: November 4, 2014
    Assignee: Microsoft Corporation
    Inventors: Dong-Sheng Yu, Mo-Han Fong, Jianglei Ma, Sophie Vrzic, Hang Zhang
  • Publication number: 20140286303
    Abstract: Methods and systems are described that are suitable for channelization, in particular, but not limited to, the IEEE 80216.m telecommunications standard. For a time-frequency resource, physical sub-carriers for each of one or more zones in the time-frequency resource are assigned to one or more zones having a respective type of transmission. At least one zone is allocated for a type of transmission using localized sub-carriers. The physical sub-carriers assigned to each zone are permuted to map to logical sub-carriers. Groups of resource blocks are formed, in which each resource block includes at least one logical sub-carrier for each of the one or more zones. The information defining the groups of resource blocks for each of the one or more zones can then be transmitted to a user. The information may be in the form of a zone configuration index.
    Type: Application
    Filed: June 5, 2014
    Publication date: September 25, 2014
    Inventors: Sophie Vrzic, Dong-Sheng Yu, Mo-Han Fong
  • Patent number: 8842756
    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: November 1, 2012
    Date of Patent: September 23, 2014
    Assignee: Apple Inc.
    Inventors: Jianglei Ma, Ming Jia, Hua Xu, Wen Tong, Peiying Zhu, Dong-Sheng Yu, Hang Zhang
  • Patent number: 8842514
    Abstract: Systems and methods for OFDM channelization are provided that allow for the co-existence of sub-band channels and diversity channels. Methods of defining diversity sub-channels and sub-band sub-channels are provided, and systematic channel definition and labeling schemes are provided.
    Type: Grant
    Filed: August 17, 2012
    Date of Patent: September 23, 2014
    Assignee: Apple Inc.
    Inventors: Hang Zhang, Jianglei Ma, Ming Jia, Sophie Vrzic, Mo-Han Fong, Dong-Sheng Yu, Hua Xu
  • Patent number: 8837631
    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: November 25, 2013
    Date of Patent: September 16, 2014
    Assignee: Apple Inc.
    Inventors: Jianglei Ma, Ming Jia, Hua Xu, Wen Tong, Peiying Zhu, Dong-Sheng Yu, Hang Zhang
  • Publication number: 20140241326
    Abstract: Transmission of uplink control message for a wireless system. The uplink control message may be encoded according to one of multiple possible schemes. The choice of encoding scheme may be made based on the control message size and/or based on the available transmission resources and/or based on the detection scheme used on the receiving end. A modulation scheme may also be selected based on such factors. CDM may be used for certain control messages. Block code encoding, such as Reed-Muller encoding may be used for certain control messages. Different transmission resources may be allocated for different control message uses. The encoding specifics may be selected to obtain a certain hamming distance and/or size of the encoded message or based on other factors.
    Type: Application
    Filed: May 5, 2014
    Publication date: August 28, 2014
    Applicant: Apple Inc.
    Inventors: Dong-Sheng YU, Hosein Nikopourdeilami, Sophie Vrzic, Mo-Han Fong, Robert Novak, Jun Yuan
  • Publication number: 20140233502
    Abstract: The present disclosure generally relates to an uplink control signal design for wireless system. One example method of a subscriber station (SS) includes performing network entry in a multi-carrier wireless environment using a primary carrier, receiving timing information corresponding to the primary carrier, receiving a first control signaling via the primary carrier, the first control signaling assigning at least one secondary carrier, transmitting uplink data via the secondary carrier using an uplink transmission timing of the secondary carrier, the uplink transmission timing of the secondary carrier being assigned the same as an uplink transmission timing of the primary carrier, and determining an adjustment of the uplink transmission timing or frequency of the secondary carrier.
    Type: Application
    Filed: April 28, 2014
    Publication date: August 21, 2014
    Inventors: Mo-Han Fong, Dong-Sheng Yu, Hosein Nikopourdeilami
  • Patent number: 8761115
    Abstract: Methods and systems for providing uplink control in a wireless communication network are described herein. The wireless communication network includes at least one base station that is communicatively coupled to at least one mobile terminal. A method includes providing a dedicated random access channel to communicatively couple the base station and the mobile terminal; initiating the mobile terminal to select a random access signaling identification; generating a resource request at the at least one base station to receive uplink resource information from the mobile terminal; and receiving an initial access information request from the at least one mobile terminal to configure the base station connection.
    Type: Grant
    Filed: April 21, 2009
    Date of Patent: June 24, 2014
    Assignee: Apple Inc.
    Inventors: Sophie Vrzic, Jun Yuan, Mo-Han Fong, Robert Novak, Dong-Sheng Yu, Jianglei Ma
  • Patent number: 8761151
    Abstract: The present disclosure generally relates to an uplink control signal design for wireless system. One example method includes establishing communication with a mobile station in a multi-carrier wireless communication system using a primary carrier, providing a first control signaling via the primary carrier, the first control signaling assigning at least one secondary carrier, and receiving a channel quality indication of the secondary carrier via the primary carrier using a control channel.
    Type: Grant
    Filed: September 2, 2009
    Date of Patent: June 24, 2014
    Assignee: BlackBerry Limited
    Inventors: Dong-Sheng Yu, Hosein Nikopourdeilami, Mo-Han Fong
  • Patent number: 8761192
    Abstract: Methods and systems are described that are suitable for channelization, in particular, but not limited to, the IEEE 802.16m telecommunications standard. For a time-frequency resource, physical sub-carriers for each of one or more zones in the time-frequency resource are assigned to one or more zones having a respective type of transmission. At least one zone is allocated for a type of transmission using localized sub-carriers. The physical sub-carriers assigned to each zone are permuted to map to logical sub-carriers. Groups of resource blocks are formed, in which each resource block includes at least one logical sub-carrier for each of the one or more zones. The information defining the groups of resource blocks for each of the one or more zones can then be transmitted to a user. The information may be in the form of a zone configuration index.
    Type: Grant
    Filed: November 7, 2008
    Date of Patent: June 24, 2014
    Assignee: Apple Inc.
    Inventors: Sophie Vrzic, Dong-Sheng Yu, Mo-Han Fong
  • Publication number: 20140161068
    Abstract: A method and system are provided having an uplink control structure and a pilot signal having minimal signal overhead for providing channel estimation and data demodulation in a wireless communication network. The uplink control structures enable mobile terminals to communicate with corresponding base stations to perform various functions including obtaining initial system access, submitting a bandwidth request, triggering a continuation of negotiated service, or providing a proposed allocation re-configuration header. A dedicated random access channel is provided to communicatively couple the base station and the mobile terminal so that the mobile terminal can select a random access signaling identification. A resource request is received at the base station to uplink resource information from the mobile terminal and an initial access information request is received from the mobile terminal to configure the base station connection.
    Type: Application
    Filed: February 11, 2014
    Publication date: June 12, 2014
    Applicant: Apple Inc.
    Inventors: Sophie Vrzic, Jun Yuan, Mo-Han Fong, Robert Novak, Dong-Sheng Yu, Jianglei Ma
  • Publication number: 20140157091
    Abstract: There is provided a method of encoding and decoding data using an error control code having a codebook G. The codebook G is a sub-codebook of a codebook P. Each codeword g in the sub-codebook G has an autocorrelation amplitude that is different from and higher than each correlation amplitude between g and each of the other codewords in the sub-codebook G. In one specific embodiment in which the codebook P is that of a Reed-Muller code, using G instead of P reduces the likelihood of the presence of more than one maximum correlation amplitude when computing the non-coherent decision metric during decoding.
    Type: Application
    Filed: September 2, 2010
    Publication date: June 5, 2014
    Applicant: MICROSOFT CORPORATION
    Inventors: Dong-Sheng Yu, Hosein Nikopourdeilami, Mo-Han Fong
  • Patent number: 8718021
    Abstract: Transmission of uplink control message for a wireless system. The uplink control message may be encoded according to one of multiple possible schemes. The choice of encoding scheme may be made based on the control message size and/or based on the available transmission resources and/or based on the detection scheme used on the receiving end. A modulation scheme may also be selected based on such factors. CDM may be used for certain control messages. Block code encoding, such as Reed-Muller encoding may be used for certain control messages. Different transmission resources may be allocated for different control message uses. The encoding specifics may be selected to obtain a certain hamming distance and/or size of the encoded message or based on other factors.
    Type: Grant
    Filed: July 6, 2010
    Date of Patent: May 6, 2014
    Assignee: Apple Inc.
    Inventors: Dong-Sheng Yu, Hosein Nikopourdeilami, Sophie Vrzic, Mo-Han Fong, Robert Novak, Jun Yuan
  • Publication number: 20140119471
    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: July 17, 2013
    Publication date: May 1, 2014
    Applicant: Apple Inc.
    Inventors: Jianglei Ma, Ming Jia, Wen Tong, Peiying Zhu, Hang Zhang, Hua Xu, Dong-Sheng Yu
  • Patent number: 8711773
    Abstract: A method for a subscriber station to perform network entry in a multi-carrier wireless environment that has a primary carrier and at least one secondary carrier associated with a base station. The method includes sensing a carrier in an area serviced by the base station and determining if the carrier is a primary carrier or a secondary carrier. The method further includes performing the network entry if the determining establishes that the sensed carrier is a primary carrier and not a secondary carrier.
    Type: Grant
    Filed: September 2, 2010
    Date of Patent: April 29, 2014
    Assignee: BlackBerry Limited
    Inventors: Dong-Sheng Yu, Hosein Nikopourdeilami, Mo-Han Fong
  • Patent number: 8711781
    Abstract: A method for a subscriber station to perform network entry in a multi-carrier wireless environment that has a primary carrier and at least one secondary carrier associated with a base station. The method includes sensing a carrier in an area serviced by the base station and determining if the carrier is a primary carrier or a secondary carrier. The method further includes performing the network entry if the determining establishes that the sensed carrier is a primary carrier and not a secondary carrier.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: April 29, 2014
    Assignee: BlackBerry Limited
    Inventors: Dong-Sheng Yu, Hosein Nikopourdeilami, Mo-Han Fong
  • Publication number: 20140079152
    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: November 25, 2013
    Publication date: March 20, 2014
    Applicant: Apple Inc.
    Inventors: Jianglei Ma, Ming Jia, Hua Xu, Wen Tong, Peiying Zhu, Dong-Sheng Yu, Hang Zhang
  • Publication number: 20140072076
    Abstract: Methods and devices are provided for MIMO OFDM transmitter and receivers having odd and/even numbers of transmit antennas. Various methods for pre-coding information bits before space time coding (STC) are described for enabling transmission of information bits over all antennas. Methods of decoding received signals that have been pre-coded and STC coded are also provided by embodiments of the invention. Pilot patterns for downlink and uplink transmission between a base station and one or more wireless terminals for three transmit antenna transmitters are also provided.
    Type: Application
    Filed: November 12, 2013
    Publication date: March 13, 2014
    Applicant: Apple Inc.
    Inventors: Mahmoud Taherzadehboroujeni, Hossein Nikopourdeilami, Amir Khandani, Wen Tong, Ming Jia, Peiying Zhu, Dong-Sheng Yu, Jianglei Ma
  • Publication number: 20140064395
    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: Application
    Filed: November 5, 2013
    Publication date: March 6, 2014
    Applicant: Apple Inc.
    Inventors: Wen Tong, Hosein Nikopourdeilami, IV, Amir Keyvam Khandani, Hua Xu, Ming Jia, Peiying Zhu, Dong-Sheng Yu