公开(公告)号：US07043272B2

公开(公告)日：2006-05-09

申请号：US10025780

申请日：2001-12-26

申请人： Hyeong Geun Park ,  Hyun Seo Oh ,  Mun Geon Kyeong

发明人： Hyeong Geun Park ,  Hyun Seo Oh ,  Mun Geon Kyeong

IPC分类号： H04M1/00

CPC分类号： H04B7/0408 ,  G01S3/30 ,  H04B7/0617

摘要： Disclosed are an apparatus for forward beamforming using a terminal feedback and a method thereof. The base station estimates an angle of arrival (AOA) range of a user signal from reverse link received data and calculates a plurality of beamforming weights steering the estimated AOA range. Then, the base station transmits a user pilot signal by sequentially using the plurality of beamforming weights at different time areas through a control channel to estimate a forward channel conditions. A terminal calculates the user pilot signal power for all fingers at the respective time areas and feeds a time area number corresponding to the greatest power back to the base station. The base station transmits a data channel signal using a beamforming weight corresponding to the time area number fed back from the terminal.

公开(公告)号：US08774033B2

公开(公告)日：2014-07-08

申请号：US13247079

申请日：2011-09-28

申请人： Cheon In Oh ,  Kyeong-Soo Han ,  Hyun Seo Oh ,  Hyun Kyun Choi

发明人： Cheon In Oh ,  Kyeong-Soo Han ,  Hyun Seo Oh ,  Hyun Kyun Choi

IPC分类号： G01R31/08

CPC分类号： H04W74/0833 ,  H04L45/3065 ,  H04W4/046 ,  H04W4/90 ,  H04W72/12

摘要： In a vehicle communication system, a frame transmitting apparatus gives a transmission opportunity to an emergency frame received from an upper layer without EDCA (Enhanced Distributed Channel Access), and gives a transmission opportunity to a generic frame received from an upper layer through EDCA.

摘要翻译： 在车辆通信系统中，帧发送装置向没有EDCA（增强分布式信道接入）的上层接收到的紧急帧提供发送机会，并且通过EDCA向从上层接收的通用帧给出发送机会。

公开(公告)号：US20060030366A1

公开(公告)日：2006-02-09

申请号：US11246098

申请日：2005-10-11

申请人： Hyeong Geun Park ,  Hyun Seo Oh ,  Mun Geon Kyeong

发明人： Hyeong Geun Park ,  Hyun Seo Oh ,  Mun Geon Kyeong

IPC分类号： H04M1/00

CPC分类号： H04B7/0408 ,  G01S3/30 ,  H04B7/0617

摘要： Disclosed are an apparatus for forward beamforming using a terminal feedback and a method thereof. The base station estimates an angle of arrival (AOA) range of a user signal from reverse link received data and calculates a plurality of beamforming weights steering the estimated AOA range. Then, the base station transmits a user pilot signal by sequentially using the plurality of beamforming weights at different time areas through a control channel to estimate a forward channel conditions. A terminal calculates the user pilot signal power for all fingers at the respective time areas and feeds a time area number corresponding to the greatest power back to the base station. The base station transmits a data channel signal using a beamforming weight corresponding to the time area number fed back from the terminal.

公开(公告)号：US08270510B2

公开(公告)日：2012-09-18

申请号：US12643296

申请日：2009-12-21

申请人： Hyun Seo Oh ,  Hyun Kyun Choi ,  Sangin Kim ,  Daeki Hong ,  Dong Yong Kwak ,  Jong-Hyun Park

发明人： Hyun Seo Oh ,  Hyun Kyun Choi ,  Sangin Kim ,  Daeki Hong ,  Dong Yong Kwak ,  Jong-Hyun Park

IPC分类号： H04L27/28

CPC分类号： H04L27/2656 ,  H04L25/068 ,  H04L27/2675 ,  H04L27/2695

摘要： An apparatus for time synchronization of an orthogonal frequency division multiplexing (OFDM) system oversamples a received signal using a master clock having a frequency at least four times higher than a minimum sampling frequency in a transmission apparatus, sets one of a plurality of oversampled signals to an on-time signal, and shifts each of the remaining oversampled signals by a predetermined time on the basis of the on-time signal. The apparatus for time synchronization calculates a correlation value by correlating each of the shifted signals and the on-time signal with a previously known signal, detects a maximum energy value among the calculated correlation values, and detects a start point of a frame by comparing the maximum energy value with a predetermined threshold value.

摘要翻译： 正交频分复用（OFDM）系统的时间同步的装置使用在发送装置中具有比最小采样频率高至少四倍的频率的主时钟对接收信号进行采样，将多个过采样信号中的一个设置为 导通时间信号，并且基于接通时间信号将每个剩余的过采样信号移位预定时间。 用于时间同步的装置通过将每个移位信号和接通时间信号与先前已知的信号相关来计算相关值，检测所计算的相关值中的最大能量值，并通过比较 具有预定阈值的最大能量值。

公开(公告)号：US08170471B2

公开(公告)日：2012-05-01

申请号：US12631351

申请日：2009-12-04

申请人： Woong Cho ,  Hyun Seo Oh ,  Dong Yong Kwak

发明人： Woong Cho ,  Hyun Seo Oh ,  Dong Yong Kwak

IPC分类号： H04B7/15

CPC分类号： H04B7/15557 ,  H04B7/15592

摘要： A cooperative communication method for vehicular communication is provided. The method in which when one vehicle transmits a signal to another vehicle, a signal of a transmission vehicle passes through a roadside device or a plurality of vehicles and thereafter signals having a plurality of paths are transmitted to a reception vehicle, and the reception vehicle combines and demodulates the signals received through the plurality of paths.

摘要翻译： 提供了一种用于车辆通信的协作通信方法。 当一个车辆向另一车辆发送信号时，传输车辆的信号通过路侧设备或多个车辆，此后具有多个路径的信号被发送到接收车辆，并且接收车辆组合 并解调通过多个路径接收的信号。

公开(公告)号：US20100173603A1

公开(公告)日：2010-07-08

申请号：US12617130

申请日：2009-11-12

申请人： Dong Yong Kwak ,  Hyun Seo Oh ,  Wan Sik Choi ,  Jong-Hyun Park

发明人： Dong Yong Kwak ,  Hyun Seo Oh ,  Wan Sik Choi ,  Jong-Hyun Park

IPC分类号： H04M11/04

CPC分类号： G08G1/164 ,  B60W30/0956 ,  B60W2550/408

摘要： Provided are a method and a system for transmitting and receiving a warning message that rapidly inform an adjacent hop of a dangerous situation that occurs on a road. The method for transmitting the warning message includes selecting one or more relay vehicles by using distances between vehicles and state information of the vehicles when the dangerous situation occurs on a road or outside, and increasing a warning message sequence number and generating and transmitting a warning message containing an identifier of the relay vehicle and a retransmission time.

摘要翻译： 提供了一种用于发送和接收警告消息的方法和系统，其迅速地通知在道路上发生的危险情况的相邻跳跃。 用于发送警告消息的方法包括：当道路或外部发生危险情况时，通过使用车辆之间的距离和车辆的状态信息来选择一个或多个中继车辆，并且增加警告消息序列号并生成并发送警告消息 包含中继车辆的标识符和重传时间。

公开(公告)号：US20100158164A1

公开(公告)日：2010-06-24

申请号：US12643296

申请日：2009-12-21

申请人： Hyun Seo Oh ,  Hyun Kyun Choi ,  Sangin Kim ,  Daeki Hong ,  Dong Yong Kwak ,  Jong-Hyun Park

发明人： Hyun Seo Oh ,  Hyun Kyun Choi ,  Sangin Kim ,  Daeki Hong ,  Dong Yong Kwak ,  Jong-Hyun Park

IPC分类号： H04L27/06 ,  H04L7/00

CPC分类号： H04L27/2656 ,  H04L25/068 ,  H04L27/2675 ,  H04L27/2695

摘要： An apparatus for time synchronization of an orthogonal frequency division multiplexing (OFDM) system oversamples a received signal using a master clock having a frequency at least four times higher than a minimum sampling frequency in a transmission apparatus, sets one of a plurality of oversampled signals to an on-time signal, and shifts each of the remaining oversampled signals by a predetermined time on the basis of the on-time signal. The apparatus for time synchronization calculates a correlation value by correlating each of the shifted signals and the on-time signal with a previously known signal, detects a maximum energy value among the calculated correlation values, and detects a start point of a frame by comparing the maximum energy value with a predetermined threshold value.

摘要翻译： 正交频分复用（OFDM）系统的时间同步的装置使用在发送装置中具有比最小采样频率高至少四倍的频率的主时钟对接收信号进行采样，将多个过采样信号中的一个设置为 导通时间信号，并且基于接通时间信号将每个剩余的过采样信号移位预定时间。 用于时间同步的装置通过将每个移位信号和接通时间信号与先前已知的信号相关来计算相关值，检测所计算的相关值中的最大能量值，并通过比较 具有预定阈值的最大能量值。

公开(公告)号：US07340282B2

公开(公告)日：2008-03-04

申请号：US11246098

申请日：2005-10-11

申请人： Hyeong Geun Park ,  Hyun Seo Oh ,  Mun Geon Kyeong

发明人： Hyeong Geun Park ,  Hyun Seo Oh ,  Mun Geon Kyeong

IPC分类号： H04M1/00 ,  H04B1/00

CPC分类号： H04B7/0408 ,  G01S3/30 ,  H04B7/0617

摘要： Disclosed are an apparatus for forward beamforming using a terminal feedback and a method thereof. The base station estimates an angle of arrival (AOA) range of a user signal from reverse link received data and calculates a plurality of beamforming weights steering the estimated AOA range. Then, the base station transmits a user pilot signal by sequentially using the plurality of beamforming weights at different time areas through a control channel to estimate a forward channel conditions. A terminal calculates the user pilot signal power for all fingers at the respective time areas and feeds a time area number corresponding to the greatest power back to the base station. The base station transmits a data channel signal using a beamforming weight corresponding to the time area number fed back from the terminal.

摘要翻译： 公开了一种使用终端反馈进行前向波束成形的装置及其方法。 基站估计来自反向链路接收数据的用户信号的到达角（AOA）范围，并计算指导估计的AOA范围的多个波束成形权重。 然后，基站通过控制信道通过在不同的时间区域顺序使用多个波束形成权重来发送用户导频信号，以估计前向信道条件。 终端计算各个时间区域中所有手指的用户导频信号功率，并将与最大功率相对应的时区数量反馈给基站。 基站使用对应于从终端反馈的时间区域号的波束形成权重发送数据信道信号。

公开(公告)号：US06832073B2

公开(公告)日：2004-12-14

申请号：US10125555

申请日：2002-04-19

申请人： Il-Soon Jang ,  Deuk Su Lyu ,  Hyun Seo Oh ,  Hyoung-Goo Jeon

发明人： Il-Soon Jang ,  Deuk Su Lyu ,  Hyun Seo Oh ,  Hyoung-Goo Jeon

IPC分类号： H04B1700

CPC分类号： H04B1/7097 ,  H04B1/71075 ,  H04B7/022 ,  H04B2201/70701 ,  H04B2201/70702

摘要： An apparatus and method for canceling pilot signals from neighbor base stations is disclosed. The present invention cancels unnecessary pilot signals transmitted from the neighbor base stations by detecting, analyzing a PN signal in a pilot signal of each base station, generating estimated interference signal according to analyzed information from the detected PN signal and subtracting estimated interference signal from the received signal. Therefore, the present invention increases a bandwidth of downlink transmission channel and improves the demodulator to be operatable in low signal-to-noise ratio (Eb/No).

摘要翻译： 公开了一种用于从相邻基站取消导频信号的装置和方法。 本发明通过检测分析每个基站的导频信号中的PN信号，根据来自检测到的PN信号的分析信息产生估计干扰信号并从接收到的信号中减去所估计的干扰信号来消除从相邻基站发送的不必要的导频信号 信号。 因此，本发明增加了下行链路传输信道的带宽，并使解调器在低信噪比（Eb / No）下可操作。