Patents Assigned to Kaist
  • Patent number: 7081443
    Abstract: The present application describes a fusion molecule that includes coiled coil domain, which renders the molecule soluble and provides potent activity.
    Type: Grant
    Filed: October 18, 2002
    Date of Patent: July 25, 2006
    Assignee: Korea Advanced Institutes of Science and Technology (Kaist)
    Inventor: Gou Young Koh
  • Publication number: 20060140217
    Abstract: Disclosed is a method for adaptively allocating frequency resources in a communication system using an orthogonal frequency division multiple access scheme. The method for allocating frequency resources in the communication system that includes a plurality of cells using an identical frequency band includes the steps of dividing a frequency band used in the communication system into sub-frequency bands corresponding to a number of cells, and allocating one of the sub-frequency bands to each of mobile subscriber stations exiting in the cells according to positions of the mobile subscriber stations, thereby increasing the degree of the freedom for frequency resource allocation and minimizing ICI.
    Type: Application
    Filed: November 30, 2005
    Publication date: June 29, 2006
    Applicants: SAMSUNG ELECTRONICS CO., LTD., Korea Advanced Institute of Science and Technology (KAIST)
    Inventors: Young-Ho Jung, Jae-Hak Chung, Woo-Seok Nam, Jae-Yeun Yun, Yong-Hoon Lee
  • Publication number: 20060104254
    Abstract: Disclosed is a method for acquiring synchronization in a mobile communication system using an Orthogonal Frequency Division Multiplexing (OFDM) scheme. The method includes modeling a power delay profile in time-varying frequency selective fading channel conditions by a specific function; detecting a log probability distribution function of a timing offset and a frequency offset in consideration of a correlation between a received signal and the received multi-path signal in the time-varying frequency selective fading channel conditions having the power delay profile modeled as the specific function; and estimating a timing offset and a frequency offset which maximize the log probability distribution function of the timing offset and the frequency offset.
    Type: Application
    Filed: November 15, 2005
    Publication date: May 18, 2006
    Applicants: SAMSUNG ELECTRONICS CO., LTD., Korea Advanced Institute of Science and Technology (KAIST)
    Inventors: Won-Yong Shin, Young-Ho Jung, Chan-Soo Hwang, Yong-Hoon Lee, Jin-Gon Joung
  • Publication number: 20060094372
    Abstract: Disclosed is a method for uplink scheduling in a communication system. The method for uplink scheduling in a communication system having a cellular structure hopping between sub-channels according to a predetermined rule whenever a signal is transmitted The communication system dividing a whole frequency band into a plurality of sub-carrier bands and including the sub-channels which are sets of the sub-carrier bands.
    Type: Application
    Filed: October 28, 2005
    Publication date: May 4, 2006
    Applicants: SAMSUNG ELECTRONICS CO., LTD., KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY (KAIST)
    Inventors: Woo-Geun Ahn, Seung-Young Park, Yeon-Woo Lee, Ok-Seon Lee, Hyung-Myung Kim, Hye-Ju Oh, Yung-Soo Kim, Tae-Sung Kang
  • Publication number: 20060094363
    Abstract: An orthogonal frequency division multiple access (OFDMA) communication system. The system has a plurality of cells, divides an entire frequency band into a plurality of subcarrier bands in each cell, and has subchannels that are a set of a preset number of subcarrier bands, respectively. Interference from neighbor cells of the plurality of cells is predicted. A time interval in which interference is absent and a time interval in which the interference is present are classified according to the interference predicted from the neighbor cells. Transmit power is equally distributed and allocated to subchannels capable of being allocated in the time interval in which the interference is absent. Transmit power is adjusted and allocated for the subchannels capable of being allocated such that inference to the neighbor cells does not occur in the time interval in which the interference is present.
    Type: Application
    Filed: October 28, 2005
    Publication date: May 4, 2006
    Applicants: SAMSUNG ELECTRONICS CO., LTD., KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY (KAIST)
    Inventors: Tae-Sung Kang, Yeon-Woo Lee, Seung-young Park, Ok-Seon Lee, Hyung-Myung Kim, Hye-Ju Oh, Yun-Jik Jang, Woo-Geun Ahn
  • Publication number: 20060068823
    Abstract: A method of compressing uplink control information in a wireless communication system where an MSS scans neighbor BSs upon request from a serving BS and transmits neighbor BS information to the serving BS. In the method, the serving BS broadcasts a neighbor advertisement message including the BS ID of at least one neighbor BS about which the serving BS wants to acquire information, and the BS ID of the at least one neighbor BS. The MSS then scans a channel from the at least one neighbor BS and transmits a scanning result along with a BS index of the at least one neighbor BS to the serving BS.
    Type: Application
    Filed: August 17, 2005
    Publication date: March 30, 2006
    Applicants: SAMSUNG ELECTRONICS CO., LTD., KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY (KAIST)
    Inventors: Tae-Soo Kwon, Sung-Hyun Cho, Dong-Ho Cho, Sang-Boh Yun, Won-Hyoung Park, Sik Choi, Ho-Won Lee, Ju-Yeop Kim, Ki-Ho Lee
  • Publication number: 20060039319
    Abstract: A method of scheduling uplink resources in a wireless communication system supporting VoIP service is provided. A BS allocates an identical amount of the resource continuously until an uplink data rate is changed by an SS's request for a data rate change. When the data rate is changed, the SS reports this event to the BS so that the BS allocates an amount of resource corresponding to the requested data rate.
    Type: Application
    Filed: August 17, 2005
    Publication date: February 23, 2006
    Applicants: SAMSUNG ELECTRONICS CO., LTD., KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY (KAIST)
    Inventors: Ho-Won Lee, Dong-Ho Cho, Sang-Boh Yun, Sung-Hyun Cho, Won-Hyoung Park, Ki-Ho Lee, Tae-Soo Kwon, Ju-Yeop Kim, Sik Choi
  • Publication number: 20060018365
    Abstract: A method of transmitting a signal by using an Adaptive Modulation and Coding scheme in a Frequency Hopping-Orthogonal Frequency Division Multiplexing Access communication system capable of dividing total frequency bands into a plurality of sub-carrier bands and including a plurality of sub-channels, which are sets of predetermined sub-carrier bands, and a plurality of cells. The method includes the steps of allocating a predetermined number of sub-channels as AMC sub-channels per each cell matching with predetermined conditions in order to apply the AMC scheme to the AMC sub-channels, and allocating remaining sub-channels except for the AMC sub-channels as FH-OFDMA sub-channels in order to apply an FH-OFDMA scheme to the FH-OFDMA sub-channels.
    Type: Application
    Filed: July 22, 2005
    Publication date: January 26, 2006
    Applicants: SAMSUNG ELECTRONICS CO., LTD., Korea Advanced Institute of Science and Technology (KAIST)
    Inventors: Young-Ho Jung, Chan-Soo Hwang, Yong-Hoon Lee, Kyung-Min Kim, Jae-Yeun Yun, Won-Yong Shin, Jin-Gon Joung, Woo-Hyuk Chang, Woo-Seok Nam
  • Publication number: 20060018412
    Abstract: Disclosed is a method for estimating a frequency offset in a mobile communication system that divides a predetermined frequency band by a time division scheme to transmit data signals or divides an entire frequency band into a plurality of sub-frequency bands to transmit the data signals. The method includes the steps of modeling a fast fading channel by one of a linear equation and a polynomial equation; and applying the model to a variable for the channel after performing the modeling and estimating the channel and the frequency offset based on a joint maximum likelihood using a training sequence.
    Type: Application
    Filed: July 22, 2005
    Publication date: January 26, 2006
    Applicants: SAMSUNG ELECTRONICS CO., LTD., Korea Advanced Institute of Science and Technology (KAIST)
    Inventors: Young-Ho Jung, Jae-Hak Chung, Jae-Yeol Kim, Jae-Yeun Yun, Young-Uhk Kim, Yong-Hoon Lee, Won-Yong Shin
  • Publication number: 20060018415
    Abstract: In a method for feeding back combination information of transmitted signals in a multiple-input multiple-output (MIMO) system using a multiple space-time block coding technique, mean square error values are computed in relation to the combination information pieces of the transmitted signals. An index of a combination having a minimum mean square error value from among the mean square error values is fed back.
    Type: Application
    Filed: July 14, 2005
    Publication date: January 26, 2006
    Applicants: SAMSUNG ELECTRONICS CO., LTD., Korea Advanced Institute of Science and Technology (KAIST)
    Inventors: Young-Ho Jung, Seung-Hoon Nam, Yong-Hoon Lee, Jin-Gon Joung, Woo-Seok Nam, Woo-Hyuk Chang
  • Publication number: 20060007887
    Abstract: A synchronous retransmission method in a mobile communication system supporting a multicast service wherein one response channel is assigned on a multicast service-by-multicast service basis, and a response signal is transmitted through the response channel only when at least one mobile terminal fails in decoding for a packet transmitted by the multicast service. Accordingly, the response signal is rapidly transferred to the packet transmitted by the multicast service, and overhead from to the response channel can be reduced.
    Type: Application
    Filed: July 7, 2005
    Publication date: January 12, 2006
    Applicants: SAMSUNG ELECTRONICS CO., LTD., KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY (KAIST)
    Inventors: Tae-Soo Kwon, Mi-Sun Do, Dong-Ho Cho, Gyung-Ho Hwang, Ki-Ho Lee, Sik Choi, Ho-Won Lee
  • Publication number: 20050254457
    Abstract: A resource allocation method in a multiuser-multiple-input multiple-output/orthogonal frequency division multiple access (MIMO/OFDMA) system. In the multiuser-MIMO/OFDMA system feedback information is received from terminals. A channel gain and a transmission rate for each user are determined using the feedback information. An average channel gain for each user is computed according to the channel gain. The average number of bits for each user is determined according to the average channel gain. The number of subchannels for each user is computed according to the average number of bits for each user. At least one subchannel is allocated to each user according to the number of subchannels for each user. A modulation scheme for each of the at least one subchannel is determined. The resource allocation method adaptively allocates subchannels and bits according to channel environment, thereby considerably improving frequency use efficiency as well as a power gain.
    Type: Application
    Filed: May 17, 2005
    Publication date: November 17, 2005
    Applicants: SAMSUNG ELECTRONICS CO., LTD., KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY (KAIST)
    Inventors: Young-Ho Jung, In-Soon Park, Seung-Hoon Nam, In-Hyoung Kim, Yong-Hoon Lee
  • Publication number: 20050254477
    Abstract: A beamforming method in a communication system having a transmitter for transmitting signals to users on a plurality of transmit antennas, and spatially identifying the users and a plurality of receivers for receiving the signals discriminately. A beamforming weight is determined based on channel information received from each of the receivers, based on whether the each receiver uses a single antenna or a plurality of antennas. A transmission signal is multiplied by the beamforming weight and transmitted.
    Type: Application
    Filed: May 17, 2005
    Publication date: November 17, 2005
    Applicants: SAMSUNG ELECTRONICS CO., LTD., KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY (KAIST)
    Inventors: Kyung-Chun Lee, Joo-Hwan Chun, Jae-Hak Chung, Seung-Hoon Nam
  • Publication number: 20050243939
    Abstract: A pilot designing method in an uplink OFDMA system is provided. In the uplink OFDMA system, communications are carried out in a frame divided into time-frequency lattices, and each time-frequency lattice includes a plurality of data symbol periods and a plurality of pilot symbol periods intermittently arranged with respect to the data symbol periods. The frame is divided into a plurality of blocks. The blocks are allocated to the terminals. A predetermined allocated pilot time-frequency lattice is shared between adjacent terminals.
    Type: Application
    Filed: March 11, 2005
    Publication date: November 3, 2005
    Applicants: SAMSUNG ELECTRONICS CO., LTD., KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY (KAIST)
    Inventors: Young-Ho Jung, Jae-Hak Chung, Chan-Soo Hwang, Seung-Hoon Nam, Yong-Hoon Lee, Hong-Sun Park
  • Publication number: 20050147176
    Abstract: In the ICI cancellation method for OFDM communication system, a receiver performs channel estimation using pilot subcarriers included in transmission signals transmitted from at least one transmitter. The transmitter generates the transmission signal in which pilot subcarriers and data subcarriers are regularly arranged, performs preceding on the transmission signal, modulates the pre-coded transmission signal into an OFDM symbol, and transmits the OFDM symbol. The receiver receives the OFDM symbol; demodulates the OFDM symbol, detects the pilot subcarriers from a demodulated signal, estimates channels using the pilot subcarriers, and restores the transmission signal using the estimated channels.
    Type: Application
    Filed: October 26, 2004
    Publication date: July 7, 2005
    Applicants: SAMSUNG ELECTRONICS CO., LTD, KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY (KAIST)
    Inventors: Jae-Yeun Yun, Yong-Hoon Lee, Eung-Sun Kim, Jong-Hyeuk Lee, Ho-Jin Kim, Chan-Soo Hwang, Seung-Hoon Nam
  • Publication number: 20050143072
    Abstract: A handoff method in a mobile communication system using frequency hopping-orthogonal frequency division multiplexing (FH-OFDM). A mobile host predicts a handoff according to strength of transmission power of a currently serving base station, reserves a physical channel required for the handoff associated with at least one candidate base station, selects a handoff target base station from the at least one candidate base station, releases a channel with the serving base station, and performs data communication with the target base station through the reserved physical channel.
    Type: Application
    Filed: October 18, 2004
    Publication date: June 30, 2005
    Applicants: SAMSUNG ELECTRONICS CO., LTD., KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY (KAIST)
    Inventors: Hyun-Soo Yoon, Pil-Yong Hwang, In-Sun Lee, Chi-Hyun Park, Kyung-Hun Jang, Yong-Hoo Lee, Won-Yong Shin, Nam-Gi Kim, Hye-Eun Choi
  • Publication number: 20050130684
    Abstract: A method for assigning a single frequency sub-channel to a plurality of MSs (Mobile Stations) in an OFDM (Orthogonal Frequency Division Multiplexing) system utilizing SDM (Spatial Division Multiplexing) with multiple transmit/receive antennas. In the method, a BS (Base Station) can effectively assign a pilot channel to estimate a downlink channel. The BS divides the single frequency sub-channel into a plurality of spatial channels, and sequentially assigns the plurality of spatial channels to the MSs having the maximum communication capacity, thereby transmitting signals of the MSs through the single frequency sub-channel.
    Type: Application
    Filed: November 15, 2004
    Publication date: June 16, 2005
    Applicants: SAMSUNG ELECTRONICS CO., LTD., KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY (KAIST)
    Inventors: Eung-Sun Kim, Jong-Hyeuk Lee, Jae-Hak Chung, Ho-Jin Kim, Joo-Hwan Chun, Kyung-Chun Lee, Il-Han Kim
  • Publication number: 20050075108
    Abstract: A method quickly resuming a downlink service in a hard handover in a cellular mobile communication system. To provide the fast downlink service to an MS during a hard handover from an OBS to an NBS, the NBS receives handover user information from the OBS, and generates an MS temporary ID using the handover user information to identify the MS. If user data is generated for the MS before a connection is established for traffic transmission between the MS and the NBS, the NBS transmits the user data to the MS on an HCCH using the MS temporary ID.
    Type: Application
    Filed: September 27, 2004
    Publication date: April 7, 2005
    Applicants: SAMSUNG ELECTRONICS CO., LTD., KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY (KAIST)
    Inventors: Dong-Ho Cho, Pil-Yong Hwang, In-Sun Lee, Chi-Hyun Park, Ae-Ri Lim, Ki-Hyun Pyun, Gyung-Ho Hwang, Ki-Ho Lee, Tae-Soo Kwon
  • Patent number: 6873165
    Abstract: A near electric-field probe is driven by a short laser pulse delayed through an optical delay-line for detecting vectors of near-field components of electrical signals propagating through a device under test including an electrical device or an electronic circuit based on a sampling principle. The near-field probe includes a photoconductive switch assembly including a thin semiconductor photoconductive body, at least two separated switch electrodes formed on the thin semiconductor photoconductive body, and an electrode gap formed between the two separated switch electrodes; and an optical waveguide attached to one side of the photoconductive switch assembly by using an optical adhesive, wherein the optical waveguide is partially coated with conductive material on the outer surface thereof.
    Type: Grant
    Filed: March 25, 2003
    Date of Patent: March 29, 2005
    Assignee: Korea Advanced Institute of Science and Technology (KAIST)
    Inventors: Jongjoo Lee, Jungho Kim
  • Publication number: 20040198340
    Abstract: An apparatus and method for self-calibrating mismatching orthogonal signals and non-linearity of a circuit occurring in a mobile transceiver. For this, in a mobile terminal, a transmitter is used as a signal generator and a receiver is used as a response characteristic measurer. A base band processor calibrates mismatching signals and non-linearity in a reception side and a transmission side, based on a test signal received via the transmitter and a test signal received via the receiver.
    Type: Application
    Filed: April 1, 2004
    Publication date: October 7, 2004
    Applicants: SAMSUNG ELECTRONICS CO., LTD., KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY (KAIST)
    Inventors: Kwy-Ro Lee, Pil-Soon Choi, Mi-Hyun Son, Seong-Soo Lee