公开(公告)号：US20050281226A1

公开(公告)日：2005-12-22

申请号：US11152428

申请日：2005-06-14

Applicant: Yong-Hwan Lee ,  Zhong-Hai Han

Inventor： Yong-Hwan Lee ,  Zhong-Hai Han

IPC: H04J11/00 ,  H04L1/00 ,  H04L12/26 ,  H04W72/08 ,  H04Q7/00

CPC classification number: H04W72/0413 ,  H04L1/0026 ,  H04L5/0007 ,  H04L5/006 ,  H04L5/0091 ,  H04W24/10 ,  H04W72/02

Abstract: Disclosed is a method for MS channel quality information to feed back in a communication system which divides an entire frequency band into a plurality of sub-carrier bands and includes sub-channels representing a set of a predetermined number of sub-carrier bands. The method includes measuring channel qualities of the sub-channels, arranging the sub-channels in a sequence in which a sub-channel having channel quality conditions precedes any other sub-channels, selecting sub-channels satisfying preset conditions from the arranged sub-channels, and feeding back channel quality information of the selected sub-channels.

Abstract translation: 公开了一种用于在将整个频带划分成多个子载波频带并且包括表示预定数量的子载波频带的一组的子信道的通信系统中反馈的MS信道质量信息的方法。 该方法包括测量子信道的信道质量，将子信道排列在具有信道质量条件的子信道先于任何其它子信道的序列中，从排列的子信道中选择满足预设条件的子信道 并且反馈所选子信道的信道质量信息。

公开(公告)号：US06950624B2

公开(公告)日：2005-09-27

申请号：US10211398

申请日：2002-08-02

Applicant: Byung-Hwan Kim ,  Yong-Hwan Lee

Inventor： Byung-Hwan Kim ,  Yong-Hwan Lee

IPC: H04B7/155 ,  H04H60/91 ,  H04M3/487 ,  H04M7/12 ,  H04N7/173 ,  H04N21/2343 ,  H04N21/235 ,  H04N21/236 ,  H04N21/258 ,  H04N21/414 ,  H04N21/434 ,  H04N21/435 ,  H04N21/4363 ,  H04N21/488 ,  H04N21/61 ,  H04N21/643 ,  H04N21/84 ,  H04H1/00

CPC classification number: H04N21/234318 ,  H04H60/91 ,  H04M3/4872 ,  H04M7/12 ,  H04M2203/205 ,  H04M2207/14 ,  H04M2207/18 ,  H04N7/173 ,  H04N21/2343 ,  H04N21/234309 ,  H04N21/235 ,  H04N21/23614 ,  H04N21/25808 ,  H04N21/41407 ,  H04N21/4348 ,  H04N21/435 ,  H04N21/43637 ,  H04N21/488 ,  H04N21/6131 ,  H04N21/643 ,  H04N21/84

Abstract: An apparatus and method for providing broadcasting service in a mobile communication system. A format converter transcodes video data received from video resources to a format suitable for the mobile communication system. A base station spreads the transcoded video data with a predetermined dedicated spreading code and broadcasts the spread video signal. A mobile station receives and despreads the broadcasting signal from the base station with the spreading code.

Abstract translation: 一种用于在移动通信系统中提供广播服务的装置和方法。 格式转换器将从视频资源接收的视频数据转码为适合移动通信系统的格式。 基站用预定的专用扩展码扩展经转码的视频数据，并广播扩展的视频信号。 移动站利用扩展码从基站接收并解扩广播信号。

公开(公告)号：US06522593B2

公开(公告)日：2003-02-18

申请号：US09989594

申请日：2001-11-20

Applicant: Sun Min Kim ,  Yong Hwan Lee

Inventor： Sun Min Kim ,  Yong Hwan Lee

IPC: G11C700

CPC classification number: G11C7/065 ,  G11C2207/065

Abstract: A sense amplifier circuit for a semiconductor device which can reduce current consumption by reducing the operation time of a pull-up driver for supplying the power voltage to a sense amp when a power voltage is higher than a reference voltage, and which can improve operation properties by increasing the operation time of the pull-up driver when the power voltage is lower than the reference voltage. The sense amplifier circuit includes: a first and a second pull-up drivers; a first and a second pull-down drivers; a voltage detecting unit; and selecting driver unit for respectively controlling operations of the first and the second pull-up drivers and the first and the second pull-down drivers according to the output signal of the voltage detecting unit.

Abstract translation: 一种用于半导体器件的读出放大器电路，其可以通过减小当电源电压高于参考电压时将功率电压提供给感测放大器的上拉驱动器的操作时间来降低电流消耗，并且可以提高操作性能 通过在电源电压低于参考电压时增加上拉驱动器的操作时间。 读出放大器电路包括：第一和第二上拉驱动器; 第一和第二下拉驱动程序; 电压检测单元; 以及根据电压检测单元的输出信号选择驱动单元，分别控制第一和第二上拉驱动器以及第一和第二下拉驱动器的操作。

公开(公告)号：US09351305B2

公开(公告)日：2016-05-24

申请号：US13362209

申请日：2012-01-31

Applicant: Dong Chan Oh ,  Yong Hwan Lee

Inventor： Dong Chan Oh ,  Yong Hwan Lee

IPC: H04W72/08 ,  H04W16/16

CPC classification number: H04W72/082 ,  H04W16/16

Abstract: A resource allocation method and an apparatus for mitigating inter-cell interference in the heterogeneous cellular communication system are provided. The method for a first type base station to allocate resource in a wireless communication system including the first and second types base stations according to the present invention includes estimating an available Frequency Assignment (FA) not used by a neighbor second type terminal among FAs used by the first type base station, and allocating sub-channels associated with one of the available FAs not used by the neighbor second type terminal to a first type terminal, wherein the second type base station allocates the sub-channels for uplink and downlink transmissions of the second type terminal over a predetermined time period such that an FA in which sub-channels for the uplink transmissions are allocated and the FA in which sub-channels for the downlink transmissions are allocated are the same.

Abstract translation: 提供了用于减轻异构蜂窝通信系统中的小区间干扰的资源分配方法和装置。 根据本发明的用于在包括第一和第二类型基站的无线通信系统中分配资源的第一类型基站的方法包括估计由邻居第二类型终端不使用的可用频率分配（FA） 第一类型基站，并且将与相邻第二类型终端未使用的可用FA之一相关联的子信道分配给第一类型终端，其中第二类型基站分配用于上行链路和下行链路传输的子信道 第二类型终端在预定时间段内，使得其中分配了用于上行链路传输的子信道的FA和分配其中用于下行链路传输的子信道的FA相同。

公开(公告)号：US08693568B2

公开(公告)日：2014-04-08

申请号：US13479939

申请日：2012-05-24

Applicant: Yong-Hwan Lee ,  Han-Jun Park ,  Keon-Wook Lee

Inventor： Yong-Hwan Lee ,  Han-Jun Park ,  Keon-Wook Lee

IPC: H04B7/02

CPC classification number: H04L25/0228 ,  H04L25/0208

Abstract: The invention relates to a method for channel estimation using a dedicated pilot signal in an OFDM-based communication system with multi-antenna transmission techniques. The receiver estimates the statistical characteristics of a virtual channel generated by beamforming by exploiting the statistical characteristics of common pilot channel, determines the optimum dedicated pilot pattern, and estimates the channel from dedicated pilot signal transmitted in an optimum pattern by means of AMMSE interpolation. The invention minimizes the channel estimation error by exploiting the statistical characteristics of the virtual channel, and optimally determines the dedicated pilot pattern according to the operation environment to maximize the transmission performance in terms of the pilot signaling overhead and the channel estimation error. In particular, the invention is very effective in low signal-to-interference plus noise power ratio (SINR) operation environments.

Abstract translation: 本发明涉及一种在具有多天线传输技术的基于OFDM的通信系统中使用专用导频信号进行信道估计的方法。 接收器通过利用公共导频信道的统计特性来估计由波束成形产生的虚拟信道的统计特性，确定最佳专用导频模式，并且通过AMMSE插值从以最佳模式发送的专用导频信号估计信道。 本发明通过利用虚拟信道的统计特性来最小化信道估计误差，并根据操作环境最佳地确定专用导频模式，以根据导频信令开销和信道估计误差来最大化传输性能。 特别地，本发明在低信噪比加噪声功率比（SINR）操作环境中非常有效。

公开(公告)号：US20130128764A1

公开(公告)日：2013-05-23

申请号：US13813138

申请日：2011-07-29

Applicant: Yong-Hwan Lee ,  Seung-Hwan Lee ,  Hyung-Sin Kim

Inventor： Yong-Hwan Lee ,  Seung-Hwan Lee ,  Hyung-Sin Kim

IPC: H04B7/06

CPC classification number: H04B7/0695 ,  H04B7/0452 ,  H04B7/0491 ,  H04B7/0617

Abstract: A Tx beamforming method for multi-sector cooperative transmission in a multi-antenna system includes determining a transmission mode of sector boundary users according to a channel condition; determining a multi-sector cooperative Tx beam for supporting multiple users, based on the transmission mode of the user; determining a user combination for multi-sector cooperative beamforming by considering the determined multi-sector cooperative Tx beam; and performing sector cooperative Tx beamforming with the determined user combination. Thus, the overall system capacity can be enhanced.

Abstract translation: 一种用于多天线系统中的多扇区协作传输的Tx波束成形方法，包括根据信道条件确定扇区边界用户的传输模式; 基于用户的传输模式确定用于支持多个用户的多扇区协作Tx波束; 通过考虑确定的多扇区协作Tx波束来确定用于多扇区协作波束成形的用户组合; 以及使用所确定的用户组合来执行扇区协作的Tx波束形成。 因此，可以提高整体系统容量。

公开(公告)号：US20130083685A1

公开(公告)日：2013-04-04

申请号：US13639845

申请日：2011-04-06

Applicant: Yong Hwan Lee ,  Hee-Nam Cho ,  Jin-Woo Lee

Inventor： Yong Hwan Lee ,  Hee-Nam Cho ,  Jin-Woo Lee

IPC: H04B7/04 ,  H04W24/10

CPC classification number: H04B7/0417 ,  H04B7/0434 ,  H04B7/0452 ,  H04B7/0478 ,  H04B7/0617 ,  H04B7/0639 ,  H04B7/0641 ,  H04B7/0647 ,  H04W24/10

Abstract: A method of signal transmission based on differentially quantized channel information in a multi-antenna wireless communication system which can transmit signal to multiple mobile stations simultaneously through multiple transmit antennas includes a main codebook reporting step of each mobile station for quantizing channel correlation information (CCI) using a main-codebook and reporting an index of the main codebook, which corresponds to the quantized CCI, to a base station. A sub-codebook reporting step of each mobile station for quantizing the change of the CCI between the quantization interval using a sub-codebook and reporting an index of the sub-codebook, which corresponds to the quantized CCI change, to a base station. A multi-user eigen-beam transmission step of the base station for generating multiple eigen-beams using the index of the main-codebook or sub-codebook reported from mobile stations and transmitting them to multiple users simultaneously.

Abstract translation: 一种能够通过多个发送天线同时发送信号到多个移动站的多天线无线通信系统中的基于差分量化信道信息的信号发送方法，包括：每个移动站的主码本报告步骤，用于量化信道相关信息（CCI） 使用主码本并将与量化的CCI对应的主码本的索引报告给基站。 每个移动站的子码本报告步骤，用于使用子码本量化量化间隔之间的CCI的变化，并将对应于量化的CCI改变的子码本的索引报告给基站。 基站的多用户特征波束发送步骤，用于使用从移动台报告的主码本或子码本的索引来生成多个本征波束，并将它们同时发送到多个用户。

公开(公告)号：US08340596B2

公开(公告)日：2012-12-25

申请号：US13058698

申请日：2009-08-06

Applicant: Yong Hwan Lee ,  Jae Yun Ko

Inventor： Yong Hwan Lee ,  Jae Yun Ko

IPC: H04B1/02

CPC classification number: H04B7/0691

Abstract: Disclosed are a signal transmission apparatus and method using a eigen antenna technique in a wireless communication system. The signal transmission apparatus according to one embodiment of the present invention relates to a signal transmission apparatus using a eigen antenna technique in a wireless communication system furnished with a plurality (N) of antennae, comprising: an antenna correlation estimate part that estimates correlation information among the antennae based on a signal received in a reverse channel; a group separation part that separates the plurality of antennae into antenna groups corresponding to the number (M) of transmission signals based on the estimated correlation information among the antennae and provides the information on the separated antenna groups; a gain adjustment part that adjusts the gain of each group antenna included in the antenna group based on the separated antenna group information; and a signal transmission part that transmits the pertinent signal via the antenna group for which the gain of the individual group antenna has been adjusted.

Abstract translation: 公开了一种在无线通信系统中使用本征天线技术的信号传输装置和方法。 根据本发明的一个实施例的信号传输装置涉及在具有多个（N）个天线的无线通信系统中使用本征天线技术的信号传输装置，包括：天线相关估计部分，其估计相关信息 基于在反向信道中接收的信号的天线; 基于所述天线中的所估计的相关信息，将所述多个天线分离成对应于所述传输信号的数量（M）的天线组的组分离部分，并提供关于分离的天线组的信息; 增益调整部，其基于分离的天线组信息来调整包括在天线组中的每个组天线的增益; 以及信号发送部，其经由已经调整了各组天线的增益的天线组来发送相关信号。

公开(公告)号：US08194635B2

公开(公告)日：2012-06-05

申请号：US12148964

申请日：2008-04-23

Applicant: Sunghyun Choi ,  Kwang-Hun Han ,  Young-Kyu Choi ,  Yong-Hwan Lee

Inventor： Sunghyun Choi ,  Kwang-Hun Han ,  Young-Kyu Choi ,  Yong-Hwan Lee

IPC: H04J3/00

CPC classification number: H04W72/1268 ,  H04W52/146 ,  H04W52/228

Abstract: An UpLink (UL) scheduling method and apparatus considering a characteristic of a power amplifier in a mobile communication terminal are provided. The UL scheduling method includes calculating a packet transmission time, which minimizes energy consumed in packet transmission, by using a Direct Current (DC) voltage used in a power amplifier for signal amplification and by using nonlinear amplification efficiency; and scheduling UL data by using the calculated packet transmission time.

Abstract translation: 提供了考虑移动通信终端中的功率放大器的特性的UpLink（UL）调度方法和装置。 UL调度方法包括通过使用用于信号放大的功率放大器中使用的直流（DC）电压和通过使用非线性放大效率来计算分组传输中消耗的能量最小化的分组传输时间; 并通过使用所计算的分组传输时间调度UL数据。

公开(公告)号：US20110261861A1

公开(公告)日：2011-10-27

申请号：US13126424

申请日：2009-10-27

Applicant: Yong Hwan Lee ,  Seung Hwan Lee

Inventor： Yong Hwan Lee ,  Seung Hwan Lee

IPC: H04B1/713

CPC classification number: H04B1/715 ,  H04B2201/709709

Abstract: Disclosed are an apparatus and a method for reducing the effect of an interference signal present in the same channel in a frequency hopping spread spectrum (FHSS) system. The apparatus of the present invention comprises: a group classification part for classifying the entire channels of the FHSS system into a certain number of groups according to the channel bandwidth unit of an FS interference signal; an FS interference elimination part for eliminating a group in which an FS interference exists from said certain number of groups based on the packet error rate (PER) of said certain number of groups that have been classified; and an FD interference avoidance part for avoiding interference by transmitting a packet only if an interference signal does not exist by estimating the existence of said FD interference signal based on a time sequence with respect to the channel to be used for the next frequency hopping (FH), when transmitting a signal by utilizing FH using channels wherein said FS interference signal does not exist. Thus, the present invention enables further shortening of the time taken for FS interference avoidance, and efficient avoidance of FD interference, thereby being capable of obtaining enhanced transmission performance.

Abstract translation: 公开了一种降低在跳频扩频（FHSS）系统中存在于相同信道中的干扰信号的影响的装置和方法。 本发明的装置包括：组分类部分，用于根据FS干扰信号的信道带宽单位将FHSS系统的整个信道分类成一定数量的组; FS干扰消除部分，用于基于已经被分类的所述一定数量的组的分组错误率（PER）来消除存在来自所述特定数量组的FS干扰的组; 以及FD干扰避免部分，用于通过基于相对于下一次跳频所使用的信道的时间序列（FH）来估计所述FD干扰信号的存在而不存在干扰信号来发送分组，以避免干扰 ），当使用其中所述FS干扰信号不存在的信道利用FH发送信号时。 因此，本发明能够进一步缩短FS干扰避免所需的时间，并且有效地避免FD干扰，从而能够获得增强的传输性能。