Patents by Inventor Ruiqi Zhang

Ruiqi Zhang 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: 8213345
    Abstract: A method and an apparatus for an uplink control signaling transmission in a time division duplex OFDMA system are provided for the long term evolution time division duplex (LTE TDD). A signaling processing unit reserves frequency resource for an uplink control channel according to the total amount of the uplink control signaling, and the reserved frequency resource are assigned on both sides of the frequency domain used by uplink time slots, so that the uplink control signaling of a terminal UE is transmitted on the position and the bandwidth of the reserved frequency resource. The transmitted uplink control signaling is transmitted on respective reserved uplink control sub-channels by an intra-subframe hopping way, each terminal UE or a group of UEs corresponding to a frequency-hop sequence. The present invention is simple to realizes and capable of utilizing resource repeatedly and utilizing the time domain and frequency domain diversity simultaneously.
    Type: Grant
    Filed: March 21, 2008
    Date of Patent: July 3, 2012
    Assignee: China Academy of Telecommunications Technology
    Inventors: Shiqiang Suo, Guojun Xiao, Ruiqi Zhang
  • Patent number: 8165151
    Abstract: A method for implementing upward frequency hopping transmission is adopted to the communication system with time slotted frame structure, and it comprises: receiving the frequency band and frequency hopping mode allocated by the network side; after implementing the upward transmission on one frequency band allocated in the first predivided time period based on the frequency hopping mode, hopping to the other allocated frequency band to implement upward transmission in the predivided second time period. A system and terminal for implementing upward frequency hopping transmission are also provided. By the invention, the frequency hopping in a transmission time interval of the alternative frame structure in the Long Term Evolution can be realized and the frequency diversity gain can be acquired.
    Type: Grant
    Filed: February 4, 2008
    Date of Patent: April 24, 2012
    Assignee: China Academy of Telecommunications Technology
    Inventors: Shiqiang Suo, Ruiqi Zhang, Shaohui Sun
  • Publication number: 20110206169
    Abstract: A noisy frequency-domain channel estimate enhancer includes an over-sampler configured to transform the noisy frequency-domain channel estimate into a time-domain channel estimate that is virtually over-sampled by an integer factor m. The over-sampler is connected to a de-interleaver configured to divide the time-domain channel estimate into m de-interleaved sub-vectors. The de-interleaver is connected to a suppressor configured to suppress noisy taps from each de-interleaved sub-vectors to form m noise suppressed sub-vectors. The suppressor is connected to a selector configured to select a noise suppressed sub-vector associated with a highest signal-to-noise ratio. The selector is connected to a discrete Fourier transformer configured to transform the selected noise suppressed sub-vector into a noise suppressed preliminary frequency-domain channel estimate.
    Type: Application
    Filed: February 22, 2011
    Publication date: August 25, 2011
    Applicant: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Zhiheng Guo, Hai Wang, Ruiqi Zhang
  • Patent number: 7780428
    Abstract: A fluid-guiding and electric conducting system for a suspended electric submersible PCP comprises a fluid-guiding system and an electric conducting system. The fluid-guiding system comprises an upper connector, a protector, a fluid-guiding sleeve, a driving mechanism, a shaft coupling, a first annular cavity, a second annular cavity, a third annular cavity, a fourth annular cavity, and a fluid outlet. The first annular cavity, the second annular cavity, the third annular cavity, the fourth annular cavity, and the fluid outlet are connected orderly to the well fluid pipe. The electric conducting system comprises a motor lead wire, a center hole of the protector, a fifth annular cavity, and a wire outlet. The fluid-guiding and electric conducting system has the advantages of simple structure, low manufacturing cost, easy assembly and inexpensive maintenance.
    Type: Grant
    Filed: July 11, 2008
    Date of Patent: August 24, 2010
    Inventors: Xihuan Zhao, Ruiqi Zhang
  • Publication number: 20100177669
    Abstract: A method and an apparatus for an uplink control signaling transmission in a time division duplex OFDMA system are provided for the long term evolution time division duplex (LTE TDD). A signaling processing unit reserves frequency resource for an uplink control channel according to the total amount of the uplink control signaling, and the reserved frequency resource are assigned on both sides of the frequency domain used by uplink time slots, so that the uplink control signaling of a terminal UE is transmitted on the position and the bandwidth of the reserved frequency resource. The transmitted uplink control signaling is transmitted on respective reserved uplink control sub-channels by an intra-subframe hopping way, each terminal UE or a group of UEs corresponding to a frequency-hop sequence. The present invention is simple to realizes and capable of utilizing resource repeatedly and utilizing the time domain and frequency domain diversity simultaneously.
    Type: Application
    Filed: March 21, 2008
    Publication date: July 15, 2010
    Applicant: DA TANG MOBILE COMMUNICATIONS EQUIPMENT CO., LTD.
    Inventors: Shiqiang Suo, Guojun Xiao, Ruiqi Zhang
  • Publication number: 20100111007
    Abstract: A method for implementing upward frequency hopping transmission is adopted to the communication system with time slotted frame structure, and it comprises: receiving the frequency band and frequency hopping mode allocated by the network side; after implementing the upward transmission on one frequency band allocated in the first predivided time period based on the frequency hopping mode, hopping to the other allocated frequency band to implement upward transmission in the predivided second time period. A system and terminal for implementing upward frequency hopping transmission are also provided. By the invention, the frequency hopping in a transmission time interval of the alternative frame structure in the Long Term Evolution can be realized and the frequency diversity gain can be acquired.
    Type: Application
    Filed: February 4, 2008
    Publication date: May 6, 2010
    Inventors: Shiqiang Suo, Ruiqi Zhang, Shaohui Sun
  • Publication number: 20080267802
    Abstract: A fluid-guiding and electric conducting system for a suspended electric submersible PCP comprises a fluid-guiding system and an electric conducting system. The fluid-guiding system comprises an upper connector, a protector, a fluid-guiding sleeve, a driving mechanism, a shaft coupling, a first annular cavity, a second annular cavity, a third annular cavity, a fourth annular cavity, and a fluid outlet. The first annular cavity, the second annular cavity, the third annular cavity, the fourth annular cavity, and the fluid outlet are connected orderly to the well fluid pipe. The electric conducting system comprises a motor lead wire, a center hole of the protector, a fifth annular cavity, and a wire outlet. The fluid-guiding and electric conducting system has the advantages of simple structure, low manufacturing cost, easy assembly and inexpensive maintenance.
    Type: Application
    Filed: July 11, 2008
    Publication date: October 30, 2008
    Inventors: Xihuan ZHAO, Ruiqi ZHANG