Patents by Inventor Yong-Xing Zhou

Yong-Xing Zhou 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: 8442448
    Abstract: An apparatus and method for transmitting and/or receiving data in a closed-loop multi-antenna system, the method of receiving data including: acquiring CQIs of data streams by channel estimation of a received signal; selecting at least one CQI from among the acquired CQIs; calculating a common CQI using the acquired CQIs; generating feedback information with the at least one CQI, the common CQI, and an index of a data stream with the at least one CQI; and transmitting the feedback information to a transmitter.
    Type: Grant
    Filed: July 2, 2007
    Date of Patent: May 14, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Sung-Jin Kim, Yong-Xing Zhou, Ho-Jin Kim, Jung-Hoon Suh, Chang-Soon Park
  • Patent number: 8315346
    Abstract: A method for transmitting/receiving feedback information in a multi-antenna system using a closed-loop scheme supporting multiple users, and a feedback system supporting the same. Multiple feedback protocol scenarios are predefined on the basis of communication environments affecting feedback information configurations. The feedback information is transmitted in a feedback protocol scenario determined by a communication environment. The feedback information is constructed with information required by the communication environment.
    Type: Grant
    Filed: March 16, 2007
    Date of Patent: November 20, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Ho-Jin Kim, Sung-Jin Kim, Jianjun Li, Yong-Xing Zhou
  • Patent number: 7995670
    Abstract: Provided are a data transmitting and receiving method for a multiple-input multiple-output (MIMO) communication system, and a transmitter and a receiver using the method. Accordingly, since precoding matrices of a codebook is constituted using a rotation matrix, expansion of the codebook is easy, and since each of the precoding matrices is determined according to the number of transmit antennas, the codebook is systematically created according to a system. In addition the codebook can be applied to even a correlated channel, and the minimum distance between precoding matrices can advantageously be maximized.
    Type: Grant
    Filed: May 24, 2007
    Date of Patent: August 9, 2011
    Assignees: Samsung Electronics Co., Ltd., Purdue Research Foundation
    Inventors: Ho-Jin Kim, Il-Han Kim, David J. Love, Seung-Young Park, Sung-Jin Kim, Yong-Xing Zhou
  • Publication number: 20110122971
    Abstract: A method for transmitting/receiving feedback information in a multi-antenna system using a closed-loop scheme supporting multiple users, and a feedback system supporting the same. Multiple feedback protocol scenarios are predefined on the basis of communication environments affecting feedback information configurations. The feedback information is transmitted in a feedback protocol scenario determined by a communication environment. The feedback information is constructed with information required by the communication environment.
    Type: Application
    Filed: March 16, 2007
    Publication date: May 26, 2011
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Ho-Jin Kim, Sung-Jin Kim, Jianjun Li, Yong-Xing Zhou
  • Patent number: 7936843
    Abstract: A self-adaptive multiple-input multiple-output (MIMO) transmission/reception system includes a transmitter provided with a serial-to-parallel converter, channel encoders, a plurality of constellation mappers, and transmission power controllers, and a receiver provided with a transmission scheme selection device, a zero forcing/minimum mean square error (ZF/MMSE) detector, reception power controllers, constellation demappers, channel decoders and a parallel-to-serial converter. The transmission scheme selection device generates information regarding plural sets of information to be used, a constellation mapping scheme and transmission power and transmits the generated information to the associated units of the transmitter and receiver, thereby controlling the number of sub code streams, the constellation mapping scheme and the transmission power. The system and method provide superior performance and require minimal feedback information.
    Type: Grant
    Filed: April 9, 2007
    Date of Patent: May 3, 2011
    Assignees: Samsung Electronics Co., Ltd., Tsinghua University
    Inventors: Yong-Xing Zhou, Jianjun Li, Jae-Kwon Kim, Jiansong Gan, Jing Wang
  • Patent number: 7894409
    Abstract: A method and apparatus for estimating available throughput of a fixed node in a mobile node of a communication network. The communication network includes fixed nodes connected to a router connected to at least one foreign network and mobile nodes connected to the fixed nodes. A second mobile node is selected from among mobile nodes connected to a fixed node whose available throughput is estimated in a first mobile node. An idle slot interval of the second mobile node connected to the fixed node is set. A transmission probability is measured in one slot interval of the second mobile node through an average of set idle slot intervals. Transmission information of the second mobile node is acquired using the measured transmission probability. The available throughput of the fixed node is estimated using the acquired transmission information.
    Type: Grant
    Filed: October 31, 2006
    Date of Patent: February 22, 2011
    Assignees: Samsung Electronics Co., Ltd., Tsinghua University
    Inventors: Hyo-Sun Hwang, Yong-Xing Zhou, Dong-Jun Lee, Jung-Hoon Suh, Kyung-Hun Jang, Young-Soo Kim, Junfeng Jiang, Pingyi Fan, Zhigang Cao
  • Patent number: 7894505
    Abstract: An apparatus and method for selecting an effective channel in a multi-user MIMO system are provided, in which a receiver receives pilot signals from a transmitter, determines channel information indicating an antenna offering the best quality among a plurality of antennas using the pilot signals, and generates feedback information with the channel information, and the transmitter receives feedback information from a plurality of receivers, generates a channel matrix using the feedback information, and transmits data simultaneously to the plurality of receivers using the channel matrix.
    Type: Grant
    Filed: April 19, 2007
    Date of Patent: February 22, 2011
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Yong-Xing Zhou, Sung-Jin Kim, JianJun Li, Ho-Jin Kim
  • Patent number: 7881396
    Abstract: A method and apparatus for transmitting a preamble for frame synchronization and channel estimation in a MIMO-OFDM communication system are provided. An OFDM communication system using Q transmit antennas generates a base preamble sequence including a CP and an orthogonal sequence. If Q?a predetermined number M, a preamble sequence for a kth antenna is S(t?(k?1)T/M). If Q>M and k?M, the preamble sequence transmitted for the kth antenna is S(t?(k?1)T/M). If Q>M and k>M, the preamble sequence for the kth antenna is (?1)(PS-1)S(t?(k?M?1)T/M). Here, S(t) is the orthogonal sequence, T is the period of the orthogonal sequence, and PS is an index indicating a transmission period of the preamble sequence. The preamble sequences are at least twice transmitted from the Q transmit antennas.
    Type: Grant
    Filed: March 4, 2010
    Date of Patent: February 1, 2011
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Yong-Xing Zhou, Jong-Han Kim
  • Publication number: 20100195480
    Abstract: A method and apparatus for transmitting a preamble for frame synchronization and channel estimation in a MIMO-OFDM communication system are provided. An OFDM communication system using Q transmit antennas generates a base preamble sequence including a CP and an orthogonal sequence. If Q?a predetermined number M, a preamble sequence for a kth antenna is S(t?(k?1)T/M). If Q>M and k?M, the preamble sequence transmitted for the kth antenna is S(t?(k?1)T/M). If Q>M and k>M, the preamble sequence for the kth antenna is (?1)(PS-1)S(t?(k?M?1)T/M). Here, S(t) is the orthogonal sequence, T is the period of the orthogonal sequence, and PS is an index indicating a transmission period of the preamble sequence. The preamble sequences are at least twice transmitted from the Q transmit antennas.
    Type: Application
    Filed: March 4, 2010
    Publication date: August 5, 2010
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Yong-Xing ZHOU, Jong-Han Kim
  • Patent number: 7729442
    Abstract: A method and system are provided for transmitting data in a multiple-input multiple-output (MIMO) communication system. A receiver sets the number of sub-streams of each column of a preceding matrix with respect to all precoding matrices of channels formed between the receiver and a transmitter and measures channel states with respect to sub-stream combinations whose number is equivalent to the number of set sub-streams. The receiver transmits data according to channel states to the transmitter after measuring the channel states with respect to the sub-stream combinations and antenna combinations representing sub-streams used upon data transmission of all the precoding matrices.
    Type: Grant
    Filed: October 31, 2006
    Date of Patent: June 1, 2010
    Assignees: Samsung Electronics Co., Ltd, Seoul National University Industry Foundation
    Inventors: Sung-Jin Kim, Ho-Jin Kim, Ju-Ho Lee, Hwan-Joon Kwon, Jianjun Li, Yong-Xing Zhou, In-Soo Hwang, Kwang-Bok Lee
  • Patent number: 7729333
    Abstract: In a method for selecting a transmission target terminal in a zero-forcing beamforming algorithm, information about a channel capacity of each terminal is received from all K terminals. A terminal with a largest channel capacity is selected as an initial transmission target terminal. A determination is made as to whether the number of currently selected terminals, i, is equal to the predefined number N. If the number of currently selected terminals, i, is different from the predefined number N, information about channel capacities of remaining terminals except previously selected transmission target terminals is received until i is equal to N and a terminal with a largest channel capacity is selected as a transmission target terminal.
    Type: Grant
    Filed: June 26, 2006
    Date of Patent: June 1, 2010
    Assignees: Samsung Electronics Co., Ltd, Tsinghua University
    Inventors: Jing Wang, Haibo Zheng, Yong-Xing Zhou, Jianjun Li, Sung-Jin Kim
  • Patent number: 7702028
    Abstract: A method and apparatus for transmitting a preamble for frame synchronization and channel estimation in a MIMO-OFDM communication system are provided. An OFDM communication system using Q transmit antennas generates a base preamble sequence including a CP and an orthogonal sequence. If Q? a predetermined number M, a preamble sequence for a kth antenna is S(t?(k?1)T/M). If Q>M and k?M the preamble sequence transmitted for the kth antenna is S(t?(k?1)T/M). If Q>M and k>M, the preamble sequence for the kth antenna is (?1)(PS?1)S(t?(k?M?1)T/M). Here, S(t) is the orthogonal sequence, T is the period of the orthogonal sequence, and PS is an index indicating a transmission period of the preamble sequence. The preamble sequences are at least twice transmitted from the Q transmit antennas.
    Type: Grant
    Filed: October 14, 2004
    Date of Patent: April 20, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Yong-Xing Zhou, Jong-Han Kim
  • Publication number: 20080125122
    Abstract: Provided is a method in which a subscriber can receive a desired service at the lowest price in a heterogeneous network and a network provider can maximize its own revenue according to situation. A handoff to a target cell for a terminal is performed by considering a handoff probability as well as resource prices in current and target cells. In cells configuring the heterogeneous network, optimal resource price for each service is computed on the basis of demand and supply resources. An arrived call from the terminal is processed using the computed resource price.
    Type: Application
    Filed: June 27, 2006
    Publication date: May 29, 2008
    Applicants: SAMSUNG ELECTRONICS CO., LTD., TSINGHUA UNIVERSITY
    Inventors: Yong- Xing Zhou, Jianjun Li, Hao Chen, Zhigang Cao, Pingyi Fan, Won-Hyoung Park
  • Publication number: 20080125051
    Abstract: An apparatus and method for transmitting and/or receiving data in a closed-loop multi-antenna system, the method of receiving data including: acquiring CQIs of data streams by channel estimation of a received signal; selecting at least one CQI from among the acquired CQIs; calculating a common CQI using the acquired CQIs; generating feedback information with the at least one CQI, the common CQI, and an index of a data stream with the at least one CQI; and transmitting the feedback information to a transmitter.
    Type: Application
    Filed: July 2, 2007
    Publication date: May 29, 2008
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Sung-Jin KIM, Yong-Xing Zhou, Ho-Jin Kim, Jung-Hoon Suh, Chang-Soon Park
  • Publication number: 20070286304
    Abstract: Provided are a data transmitting and receiving method for a multiple-input multiple-output (MIMO) communication system, and a transmitter and a receiver using the method. Accordingly, since precoding matrices of a codebook is constituted using a rotation matrix, expansion of the codebook is easy, and since each of the precoding matrices is determined according to the number of transmit antennas, the codebook is systematically created according to a system. In addition the codebook can be applied to even a correlated channel, and the minimum distance between precoding matrices can advantageously be maximized.
    Type: Application
    Filed: May 24, 2007
    Publication date: December 13, 2007
    Inventors: Ho-Jin Kim, Il-Han Kim, David Love, Seung-Young Park, Sung-Jin Kim, Yong-Xing Zhou
  • Publication number: 20070253507
    Abstract: A self-adaptive multiple-input multiple-output (MIMO) transmission/reception system includes a transmitter provided with a serial-to-parallel converter, channel encoders, a plurality of constellation mappers, and transmission power controllers, and a receiver provided with a transmission scheme selection device, a zero forcing/minimum mean square error (ZF/MMSE) detector, reception power controllers, constellation demappers, channel decoders and a parallel-to-serial converter. The transmission scheme selection device generates information regarding plural sets of information to be used, a constellation mapping scheme and transmission power and transmits the generated information to the associated units of the transmitter and receiver, thereby controlling the number of sub code streams, the constellation mapping scheme and the transmission power. The system and method provide superior performance and require minimal feedback information.
    Type: Application
    Filed: April 9, 2007
    Publication date: November 1, 2007
    Applicants: SAMSUNG ELECTRONICS CO., LTD., Tsinghua University
    Inventors: Yong-Xing Zhou, Jianjun Li, Jae-Kwon Kim, Jiansong Gan, Jing Wang
  • Publication number: 20070253508
    Abstract: An apparatus and method for selecting an effective channel in a multi-user MIMO system are provided, in which a receiver receives pilot signals from a transmitter, determines channel information indicating an antenna offering the best quality among a plurality of antennas using the pilot signals, and generates feedback information with the channel information, and the transmitter receives feedback information from a plurality of receivers, generates a channel matrix using the feedback information, and transmits data simultaneously to the plurality of receivers using the channel matrix.
    Type: Application
    Filed: April 19, 2007
    Publication date: November 1, 2007
    Inventors: Yong-Xing Zhou, Sung-Jin Kim, JianJun Li, Ho-Jin Kim
  • Publication number: 20070160162
    Abstract: A method and system are provided for transmitting data in a multiple-input multiple-output (MIMO) communication system. A receiver sets the number of sub-streams of each column of a preceding matrix with respect to all precoding matrices of channels formed between the receiver and a transmitter and measures channel states with respect to sub-stream combinations whose number is equivalent to the number of set sub-streams. The receiver transmits data according to channel states to the transmitter after measuring the channel states with respect to the sub-stream combinations and antenna combinations representing sub-streams used upon data transmission of all the precoding matrices.
    Type: Application
    Filed: October 31, 2006
    Publication date: July 12, 2007
    Applicants: SAMSUNG ELECTRONICS CO., LTD., Seoul National University Industry Foundation
    Inventors: Sung-Jin Kim, Ho-Jin Kim, Ju-Ho Lee, Hwan-Joon Kwon, Jianjun Li, Yong-Xing Zhou, In-Soo Hwang, Kwang-Bok Lee
  • Publication number: 20070147291
    Abstract: A method and apparatus for estimating available throughput of a fixed node in a mobile node of a communication network. The communication network includes fixed nodes connected to a router connected to at least one foreign network and mobile nodes connected to the fixed nodes. A second mobile node is selected from among mobile nodes connected to a fixed node whose available throughput is estimated in a first mobile node. An idle slot interval of the second mobile node connected to the fixed node is set. A transmission probability is measured in one slot interval of the second mobile node through an average of set idle slot intervals. Transmission information of the second mobile node is acquired using the measured transmission probability. The available throughput of the fixed node is estimated using the acquired transmission information.
    Type: Application
    Filed: October 31, 2006
    Publication date: June 28, 2007
    Applicants: SAMSUNG ELECTRONICS CO., LTD., Tsinghua University
    Inventors: Hyo-Sun Hwang, Yong-Xing Zhou, Dong-Jun Lee, Jung-Hoon Suh, Kyung-Hun Jang, Young-Soo Kim, Junfeng Jiang, Pingyi Fan, Zhigang Cao
  • Publication number: 20070058590
    Abstract: In a method for selecting a transmission target terminal in a zero-forcing beamforming algorithm, information about a channel capacity of each terminal is received from all K terminals. A terminal with a largest channel capacity is selected as an initial transmission target terminal. A determination is made as to whether the number of currently selected terminals, i, is equal to the predefined number N. If the number of currently selected terminals, i, is different from the predefined number N, information about channel capacities of remaining terminals except previously selected transmission target terminals is received until i is equal to N and a terminal with a largest channel capacity is selected as a transmission target terminal.
    Type: Application
    Filed: June 26, 2006
    Publication date: March 15, 2007
    Applicants: SAMSUNG ELECTRONICS CO., LTD., Tsinghua University
    Inventors: Jing Wang, Haibo Zheng, Yong-Xing Zhou, Jianjun Li, Sung-Jin Kim