Patents by Inventor Dazi Feng

Dazi Feng 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).

  • Techniques for providing efficient transmit diversity and bandwidth segmentation in a wireless communication system
    Patent number: 8868132
    Abstract: Wireless communication techniques for cellular deployment of wireless communication systems with transmitters in each cell to have partially overlapped transmission patterns between two adjacent transmitters. Implementations of the described techniques can provide transmit diversity with intentional partial beam pattern overlays to improve cell sectorization or frequency re-use factor, at the same time, reduce intra-cell and inter-cell interference. Various modulations may be used in the described systems, including FDMA, TDMA, and OFDMA modulation schemes.
    Type: Grant
    Filed: May 21, 2012
    Date of Patent: October 21, 2014
    Assignee: ZTE (USA) Inc.
    Inventors: Jason Hou, Dazi Feng, Sean Cai, Mary Chion, Jing Wang
  • Subcarrier cluster-based power control in wireless communications
    Patent number: 8711739
    Abstract: Devices, systems and techniques to monitor signal fading based on a cluster of subcarriers at a receiver and feedback monitored signal fading to a transmitter in wireless communication systems such as OFDM and OFDMA systems.
    Type: Grant
    Filed: October 4, 2011
    Date of Patent: April 29, 2014
    Assignee: ZTE (USA) Inc.
    Inventors: Sean Cai, Jason Hou, Jing Wang, Dazi Feng, Mary Chion, Jun Han
  • Techniques for providing efficient transmit diversity and bandwidth segmentation in a wireless communication system
    Patent number: 8185160
    Abstract: Wireless communication techniques for cellular deployment of wireless communication systems with transmitters in each cell to have partially overlapped transmission patterns between two adjacent transmitters. Implementations of the described techniques can provide transmit diversity with intentional partial beam pattern overlays to improve cell sectorization or frequency re-use factor, at the same time, reduce intra-cell and inter-cell interference. Various modulations may be used in the described systems, including FDMA, TDMA, and OFDMA modulation schemes.
    Type: Grant
    Filed: August 19, 2008
    Date of Patent: May 22, 2012
    Assignee: ZTE (USA) Inc.
    Inventors: Jason Hou, Dazi Feng, Sean Cai, Mary Chion, Jing Wang
  • Transmission and reception of reference preamble signals in OFDMA or OFDM communication systems
    Patent number: 8116195
    Abstract: Techniques for generating preamble sequences for OFDM and OFDMA communication systems based on CAZAC sequences with desired properties of constant amplitudes (CA) and zero autocorrelation (ZAC). Such preamble sequences may be used for synchronization and identification of individual transmitters. For example, the OFDMA symbol is constructed using a CAZAC sequence in the frequency-domain and the resulting time-domain waveform is a near-CAZAC sequence.
    Type: Grant
    Filed: July 27, 2005
    Date of Patent: February 14, 2012
    Assignee: ZTE (USA) Inc.
    Inventors: Jason Hou, Jing Wang, Sean Cai, Dazi Feng, Yonggang Fang, Yunsong Yang
  • Subcarrier cluster-based power control in wireless communications
    Patent number: 8031642
    Abstract: Devices, systems and techniques to monitor signal fading based on a cluster of subcarriers at a receiver and feedback monitored signal fading to a transmitter in wireless communication systems such as OFDM and OFDMA systems.
    Type: Grant
    Filed: October 20, 2005
    Date of Patent: October 4, 2011
    Assignee: ZTE (USA) Inc.
    Inventors: Sean Cai, Jason Hou, Jing Wang, Dazi Feng, Mary Chion, Jun Han
  • Techniques for providing efficient transmit diversity and bandwidth segmentation in a wireless communication system
    Patent number: 7415288
    Abstract: Wireless communication techniques for cellular deployment of wireless communication systems with transmitters in each cell to have partially overlapped transmission patterns between two adjacent transmitters. Implementations of the described techniques can provide transmit diversity with intentional partial beam pattern overlays to improve cell sectorization or frequency re-use factor, at the same time, reduce intra-cell and inter-cell interference. Various modulations may be used in the described systems, including FDMA, TDMA, and OFDMA modulation schemes.
    Type: Grant
    Filed: January 9, 2006
    Date of Patent: August 19, 2008
    Assignee: ZTE (USA) Inc.
    Inventors: Jason Hou, Dazi Feng, Sean Cai, Mary Chion, Jing Wang
  • Subcarrier cluster-based power control in wireless communications
    Publication number: 20060109923
    Abstract: Devices, systems and techniques to monitor signal fading based on a cluster of subcarriers at a receiver and feedback monitored signal fading to a transmitter in wireless communication systems such as OFDM and OFDMA systems.
    Type: Application
    Filed: October 20, 2005
    Publication date: May 25, 2006
    Inventors: Sean Cai, Jason Hou, Jing Wang, Dazi Feng, Mary Chion, Jun Han
  • Transmission and reception of reference preamble signals in OFDMA or OFDM communication systems
    Publication number: 20060050799
    Abstract: Techniques for generating preamble sequences for OFDM and OFDMA communication systems based on CAZAC sequences with desired properties of constant amplitudes (CA) and zero autocorrelation (ZAC). Such preamble sequences may be used for synchronization and identification of individual transmitters. For example, the OFDMA symbol is constructed using a CAZAC sequence in the frequency-domain and the resulting time-domain waveform is a near-CAZAC sequence.
    Type: Application
    Filed: July 27, 2005
    Publication date: March 9, 2006
    Inventors: Jason Hou, Jing Wang, Sean Cai, Dazi Feng, Yonggang Fang, Yunsong Yang