Patents by Inventor Yongkang Jia

Yongkang 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).

  • Publication number: 20110200018
    Abstract: A method for providing transmit diversity in wireless network communications is presented. An indication of a slot structure is received. The slot structure identifies at least a first location of a reference signal within a slot. A first reference signal is transmitted within a first slot using a first antenna. A location of the first reference signal within the first slot is determined by the slot structure. A second reference signal is transmitted within the first slot using a second antenna. A location of the second reference signal within the first slot is determined by the slot structure. In some cases, the slot structure identifies a second location of a reference signal within the slot structure. The second location being offset from the first location, and a third reference signal is transmitted within the first slot at the second location on the first antenna.
    Type: Application
    Filed: February 12, 2010
    Publication date: August 18, 2011
    Inventors: Masoud Ebrahimi Tazeh Mahalleh, Robert Mark Harrison, Yongkang Jia, Hua Xu
  • Publication number: 20110176629
    Abstract: Information transmission in a multiple-input multiple-output (“MIMO”) wireless communication system is provided.
    Type: Application
    Filed: January 18, 2010
    Publication date: July 21, 2011
    Inventors: Alireza Bayesteh, Amin Mobasher, Hua Xu, Yongkang Jia, Yi Yu, Jack Anthony Smith, Zhijun Sam Cai, Shiwei Gao
  • Publication number: 20100322179
    Abstract: A method and system for identifying a reference signal pattern in contiguous resource blocks received by a user agent (UA) in a wireless communication system where any of one through N contiguous resource blocks may be assigned to a UA, the method performed by a UA and comprising the steps of storing resource block reference signal patterns in a UA memory where the patterns include a separate reference signal pattern for each possible number of contiguous resource blocks that may be assigned to a UA, receiving a resource grant indicating a number contiguous resource block is assigned to the UA, based on the number of contiguous resource blocks assigned to the UA, identifying one of the reference signal patterns in the memory and using the identified one of the reference signal patterns to identify reference signals in contiguously received resource blocks.
    Type: Application
    Filed: June 21, 2010
    Publication date: December 23, 2010
    Applicant: RESEARCH IN MOTION LIMITED
    Inventors: Dongsheng Yu, Yongkang Jia, Hua Xu, Zhijun Cai, Mo-Han Fong
  • Publication number: 20100322341
    Abstract: A method and device for transmitting and receiving data. A device comprises a code book and a transmitter. The code book comprises a plurality of codewords, wherein the plurality of codewords correspond to a plurality of vectors having a largest minimum chordal distance with respect to the plurality of vectors. The transmitter is configured to send a number of wireless signals using the code book. A receiver receives and decodes the number of wireless signals.
    Type: Application
    Filed: February 9, 2010
    Publication date: December 23, 2010
    Applicant: RESEARCH IN MOTION LIMITED
    Inventors: Alireza Bayesteh, Farzaneh Kohandani, Yongkang Jia
  • Publication number: 20100271988
    Abstract: A method and system for multiple input, multiple output (MIMO) detection and channel decoding comprising: decomposing a channel complex gain matrix into a unitary matrix and an upper right hand triangular matrix; providing a received signal to a complex conjugate transpose of the unitary matrix, thereby creating a plurality of signals; normalizing a last of the plurality of signals; channel decoding the normalized last of the plurality of signals, thereby recovering a last codeword signal; encoding the last codeword signal; utilizing the encoded last codeword signal to recover a second last codeword signal; and repeating the utilizing until all codeword signals are recovered. Also, a method and system for providing an imbalanced modulation and coding scheme for successive interference cancellation.
    Type: Application
    Filed: April 27, 2010
    Publication date: October 28, 2010
    Inventors: Yongkang Jia, Mo-Han Fong, Zhijun Cai, Yi Yu, Hua Xu
  • Publication number: 20100067632
    Abstract: A method for performing a radio link timing estimation for synchronization to a wireless communications channel such as an uplink channel in a 3GPP Long Term Evolution (LTE) network in a mobile wireless device or wireless network base station is provided. A channel frequency response estimate from a received reference signal comprising multiple non-coherent Orthogonal Frequency Division Multiplexing (OFDM) symbols is obtained. A frequency response covariance matrix from the channel frequency response estimate is then generated. Timing offsets of the received reference signal using covariance matrix and timing offset estimation algorithms are then estimated.
    Type: Application
    Filed: September 12, 2008
    Publication date: March 18, 2010
    Applicant: Research in Motion Limited
    Inventor: Yongkang Jia
  • Publication number: 20090161620
    Abstract: A system and method are disclosed for providing efficient uplink resource utilization wireless communication system. The system and method for use with a network access equipment in scheduling uplink transmissions to ensure that a user equipment is not transmitting unnecessary information at inconvenient times.
    Type: Application
    Filed: December 18, 2008
    Publication date: June 25, 2009
    Applicant: RESEARCH IN MOTION LIMITED
    Inventors: Zhijun CAI, James Earl WOMACK, Yongkang JIA
  • Publication number: 20090161654
    Abstract: A system and method are disclosed for providing uplink timing synchronization in a wireless communication system. The uplink timing synchronization may be provided via a specific message sent from the user equipment to a network access device, or may be calculated based upon data received at the network access device from the user equipment.
    Type: Application
    Filed: December 18, 2008
    Publication date: June 25, 2009
    Applicant: Research in Motion Limited
    Inventors: Zhijun Cai, James Earl Womack, Yongkang Jia
  • Publication number: 20090129312
    Abstract: The present disclosure relates generally to systems and methods for timing synchronization. Uplink synchronization is a necessary component of a UE operating in a mobile, wireless network. Reliable uplink synchronization generally requires regular uplink transmission containing reference signals. A method is provided that defines a burst period for sending the reference signals, determines an interval between the reference signals, and sends a timing instruction message that includes the burst period and the determined interval. A second method is provided that receives the timing instruction message and sends the reference signals in accordance with the timing instruction.
    Type: Application
    Filed: November 20, 2007
    Publication date: May 21, 2009
    Applicant: RESEARCH IN MOTION LIMITED
    Inventors: Yongkang Jia, James Earl Womack, Zhijun Cai, Shouxing Qu