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: 20140219373
    Abstract: A method, system and device are provided to enable one or more users to receive mixed-rank data from two transmitters by using an indexed list of linearly independent, predetermined vectors Vref={vref1, . . . , vrefM} and channel knowledge H1, H2 from first and second transmitters to compute equivalent channel matrix information Hieq based on the assigned or determined rank of the receiver. With this information, each transmitter selects Li receivers and constructs a transmitted signal by applying a selected precoding matrix to the mixed rank data, thereby eliminating interference to the rest of the receivers in the network so that a receiver can receive transmitted signals from both transmitters.
    Type: Application
    Filed: February 1, 2011
    Publication date: August 7, 2014
    Applicant: Research In Motion Limited
    Inventors: Amin Mobasher, Yongkang Jia, Alireza Bayesteh
  • Patent number: 8724724
    Abstract: The present disclosure provides for the construction and use of a set of Zero-Correlation-Zone (ZCZ) Concatenated Complementary Pair (CCP) sequences with zero-correlation-zone range greater than one or with zero-correlation-zone range equal to one and the sequence set size greater than two. Complementary pair sequences A and B are selected and, for each member of the set of ZCZ CCP sequences, sign sequences pA and pB are combined with the complementary pair sequences to form a member ZCZ CCP sequence of the set. A ZCZ CCP sequence modified by propagation over a communication channel may be identified by cross-correlation with ZCZ CCP sequences of the set. A set of sign sequences may be constructed by recursive expansion from an initial set or found by a computer search. The sequences may be used in a transceiver of a portable electronic device or other communication device.
    Type: Grant
    Filed: June 29, 2012
    Date of Patent: May 13, 2014
    Assignee: BlackBerry Limited
    Inventors: Yan Xin, Yongkang Jia, Huan Wu, Shouxing Qu, Arnold Sheynman
  • Patent number: 8705463
    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: Grant
    Filed: June 21, 2010
    Date of Patent: April 22, 2014
    Assignee: BlackBerry Limited
    Inventors: Dongsheng Yu, Yongkang Jia, Hua Xu, Zhijun Cai, Mo-Han Fong
  • Patent number: 8665993
    Abstract: Methods are disclosed for transmitting a plurality of information bits using resource selection on multiple antennas. In one or more embodiments, the methods include: selecting a first and a second orthogonal resource from an allocation of more than two orthogonal resources according to the state of the plurality of information bits; transmitting a first symbol in a first symbol instant on a first antenna using the first orthogonal resource; and transmitting a second symbol in the first symbol instant on a second antenna using the second orthogonal resource. In some embodiments, the first and second orthogonal resources are different and the first symbol is either a reference symbol or a modulation symbol.
    Type: Grant
    Filed: September 29, 2011
    Date of Patent: March 4, 2014
    Assignee: BlackBerry Limited
    Inventors: Masoud Ebrahimi Tazeh Mahalleh, Robert Mark Harrison, Youn Hyoung Heo, Yongkang Jia
  • Patent number: 8665930
    Abstract: A method for user equipment operation in a wireless communication system, the wireless communication system having an base station, the method comprising measuring a channel between the UE and the base station, determining a quantized estimate using a codebook to approximate the measured channel, computing an error measure for the quantized estimate and transmitting the error measure and the quantized estimate to the base station for use by the base station in reconstructing an actual channel vector.
    Type: Grant
    Filed: February 17, 2010
    Date of Patent: March 4, 2014
    Assignee: BlackBerry Limited
    Inventors: Shiguang Guo, Hua Xu, Yongkang Jia, Dongsheng Yu, Alireza Bayesteh, Shiwei Gao
  • Patent number: 8644422
    Abstract: A method is provided for searching for a pairing PMI including estimating a MIMO wireless propagation channel from an access point transmitter to a receiver at a UE; quantizing the estimated channel with a codebook consisting of a plurality of codewords, the result being an actual SU-MIMO PMI currently applicable to the UE; estimating the channel quality corresponding to the actual SU-MIMO PMI, resulting in at least one CQI for the UE; constructing a plurality of subsets from a codebook of codewords, wherein each subset comprises potential MU-MIMO PMIs that represent channels that have reduced interference with a channel represented by one of the potential SU-MIMO PMIs; associating each potential SU-MIMO PMI with the subset that comprises the potential MU-MIMO PMIs that represent channels that have reduced interference with the channel represented by that potential SU-MIMO PMI; searching for an appropriate pairing PMI and the associated CQI for the UE.
    Type: Grant
    Filed: February 12, 2010
    Date of Patent: February 4, 2014
    Assignee: BlackBerry Limited
    Inventors: Shiwei Gao, Hua Xu, Yongkang Jia, Amin Mobasher, Alireza Bayesteh, Zhijun Cai
  • Publication number: 20140003474
    Abstract: The present disclosure provides for the construction and use of a set of Zero-Correlation-Zone (ZCZ) Concatenated Complementary Pair (CCP) sequences with zero-correlation-zone range greater than one or with zero-correlation-zone range equal to one and the sequence set size greater than two. Complementary pair sequences A and B are selected and, for each member of the set of ZCZ CCP sequences, sign sequences pA and pB are combined with the complementary pair sequences to form a member ZCZ CCP sequence of the set. A ZCZ CCP sequence modified by propagation over a communication channel may be identified by cross-correlation with ZCZ CCP sequences of the set. A set of sign sequences may be constructed by recursive expansion from an initial set or found by a computer search. The sequences may be used in a transceiver of a portable electronic device or other communication device.
    Type: Application
    Filed: June 29, 2012
    Publication date: January 2, 2014
    Applicant: RESEARCH IN MOTION LIMITED
    Inventors: Yan XIN, Yongkang JIA, Huan WU, Shouxing QU, Arnold SHEYNMAN
  • Publication number: 20140003475
    Abstract: The present disclosure provides for the construction and use of a set of Zero-Correlation-Zone (ZCZ) Concatenated Complementary Pair (CCP) sequences with zero-correlation-zone range greater than one or with zero-correlation-zone range equal to one and the sequence set size greater than two. Complementary pair sequences A and B are selected and, for each member of the set of ZCZ CCP sequences, sign sequences pA and pB are combined with the complementary pair sequences to form a member ZCZ CCP sequence of the set. A ZCZ CCP sequence modified by propagation over a communication channel may be identified by cross-correlation with ZCZ CCP sequences of the set. A set of sign sequences may be constructed by recursive expansion from an initial set or found by a computer search. The sequences may be used in a transceiver of a portable electronic device or other communication device.
    Type: Application
    Filed: June 29, 2012
    Publication date: January 2, 2014
    Applicant: RESEARCH IN MOTION LIMITED
    Inventors: Yan Xin, Yongkang Jia, Huan Wu, Shouxing Qu, Arnold Sheynman
  • Publication number: 20130343477
    Abstract: A method is provided for communication in a wireless telecommunication system. The method comprises transmitting, by a UE, a DMRS, wherein REs carrying the DMRS are separated into a plurality of portions, each of the portions occupying a different OFDM symbol in a single slot of a radio subframe. In one aspect, a new PUSCH DMRS format may provide accurate channel estimates, increased RS density in the time domain at the expense of relaxed PAPR, and/or a symmetric pattern to ease the channel estimation algorithm. The PUSCH DMRS format may provide sufficient RS density in the time domain to enable accurate channel estimation for high Doppler scenarios.
    Type: Application
    Filed: November 1, 2012
    Publication date: December 26, 2013
    Applicant: RESEARCH IN MOTION LIMITED
    Inventors: Yongkang Jia, Yi Song, Yi Yu, Chandra Sekhar Bontu, Zhijun Cai
  • Publication number: 20130322287
    Abstract: A method for communication in a wireless network is provided. The method includes a relay node receiving a data packet and determining whether to transmit the packet without performing error checking.
    Type: Application
    Filed: February 17, 2011
    Publication date: December 5, 2013
    Applicant: BLACKBERRY LIMITED
    Inventors: Chandra Sekhar Bontu, Yongkang Jia, Amin Mobasher
  • Patent number: 8594220
    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: Grant
    Filed: February 9, 2010
    Date of Patent: November 26, 2013
    Assignee: Research In Motion Limited
    Inventors: Alireza Bayesteh, Farzaneh Kohandani, Yongkang Jia
  • Patent number: 8576775
    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: Grant
    Filed: April 27, 2010
    Date of Patent: November 5, 2013
    Assignee: BlackBerry Limited
    Inventors: Yongkang Jia, Mo-Han Fong, Zhijun Cai, Yi Yu, Hua Xu
  • Publication number: 20130235812
    Abstract: A method is provided for communication in a wireless telecommunication system. The method comprises generating a sequence of signals of an enhanced physical HARQ (hybrid automatic repeat request) indicator channel (E-PHICH). The method further comprises mapping the sequence of signals of the E-PHICH to a first set of resource elements, wherein the first set of resource elements is multiplexed with a second set of resource elements over a set of virtual resource blocks, and wherein the second set of resource elements carries at least one of an enhanced physical downlink control channel (E-PDCCH) and a physical downlink shared channel (PDSCH).
    Type: Application
    Filed: July 10, 2012
    Publication date: September 12, 2013
    Applicant: RESEARCH IN MOTION LIMITED
    Inventors: Youn Hyoung Heo, Shiwei Gao, Hua Xu, Yufei Wu Blankenship, Yongkang Jia
  • Publication number: 20130194908
    Abstract: A method for resource allocation. The method includes signaling a set of SRS subframes in which an SRS can be transmitted, wherein a UE not capable of aperiodic SRS transmission can be instructed to transmit periodic SRS in any of the SRS subframes. The method further includes signaling which of the SRS subframes are to be used for periodic SRS transmissions and which are to be used for aperiodic SRS transmissions, wherein a periodic SRS transmission is an SRS transmission that is transmitted by a UE in a first subframe, the first subframe being determined at least by the subframe in which the UE transmitted a previous SRS and an SRS periodicity, and wherein an aperiodic SRS transmission is an SRS transmission that is transmitted by a UE in a second subframe, the second subframe being determined at least by a transmission on a physical control channel to the UE.
    Type: Application
    Filed: August 13, 2010
    Publication date: August 1, 2013
    Applicant: RESEARCH IN MOTION LIMITED
    Inventors: Shiwei Gao, Robert Mark Harrison, Zhijun Cai, Yongkang Jia, Hua Xu, Jack Anthony Smith, James Earl Womack
  • Publication number: 20130083681
    Abstract: A method of operating an eNB in a wireless communication network is provided, wherein the eNB is configured for coordinated multipoint (CoMP) transmission. The method comprises determining, by the eNB, whether to use a fall back transmission scheme for communicating with a UE in the network, wherein the fall back transmission scheme is different from a regular transmission scheme. The method further comprises transmitting, by the eNB, data using the fall back transmission scheme in one or more selected subframes and/or on selected frequency resources.
    Type: Application
    Filed: July 10, 2012
    Publication date: April 4, 2013
    Applicant: RESEARCH IN MOTION LIMITED
    Inventors: Masoud Ebrahimi Tazeh Mahalleh, Shiwei Gao, Yongkang Jia, Tarik Tabet, Hua Xu
  • Patent number: 8406332
    Abstract: Information transmission in a multiple-input multiple-output (“MIMO”) wireless communication system is provided.
    Type: Grant
    Filed: January 18, 2010
    Date of Patent: March 26, 2013
    Assignee: Research In Motion Limited
    Inventors: Alireza Bayesteh, Amin Mobasher, Hua Xu, Yongkang Jia, Yi Yu, Jack Anthony Smith, Zhijun Sam Cai, Shiwei Gao
  • Publication number: 20130064196
    Abstract: A method is provided for operating an eNB in a wireless communication network. The method comprises allocating, by the eNB, one or more resource units within one or more physical resource block pairs to a user equipment for transmitting enhanced control information.
    Type: Application
    Filed: September 11, 2012
    Publication date: March 14, 2013
    Applicant: RESEARCH IN MOTION LIMITED
    Inventors: Shiwei Gao, Hua Xu, Yongkang Jia, Amin Mobasher
  • Publication number: 20130064216
    Abstract: A method is provided for operating a UE in a wireless communication network. The method comprises sending, by the UE, an ACK/NACK message after receiving data on a PDSCH scheduled by an E-PDCCH, wherein the sending is from at least one antenna port and uses at least one physical resource, and wherein the at least one physical resource is determined based at least partially on a resource over which the E-PDCCH is received, and wherein the resource over which the E-PDCCH is received consists of at least one eCCE.
    Type: Application
    Filed: September 11, 2012
    Publication date: March 14, 2013
    Applicant: RESEARCH IN MOTION LIMITED
    Inventors: Shiwei Gao, Hua Xu, Yongkang Jia, Amin Mobasher
  • Publication number: 20130064215
    Abstract: A method is provided for communication in a wireless telecommunications network. The method comprises transmitting an extended physical downlink control channel to a user equipment using transmit diversity from at least one demodulation reference signal port.
    Type: Application
    Filed: September 11, 2012
    Publication date: March 14, 2013
    Applicant: RESEARCH IN MOTION LIMITED
    Inventors: Shiwei Gao, Hua Xu, Yongkang Jia, Amin Mobasher
  • Patent number: 8391272
    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: Grant
    Filed: November 18, 2011
    Date of Patent: March 5, 2013
    Assignee: Research In Motion Corporation
    Inventors: Zhijun Cai, James Earl Womack, Yongkang Jia