专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

11. 发明授权

US07515902B2 Velocity estimation apparatus in mobile communication environments 有权
标题翻译：移动通信环境中的速度估计装置
公开(公告)号：US07515902B2
公开(公告)日：2009-04-07
申请号：US11143074
申请日：2005-06-02
申请人： Goo-Hyun Park , Dae-Sik Hong , Ye-Hoon Lee , Eung-Sun Kim , Myeon-Gyun Cho , Jong-Hyeuk Lee
发明人： Goo-Hyun Park , Dae-Sik Hong , Ye-Hoon Lee , Eung-Sun Kim , Myeon-Gyun Cho , Jong-Hyeuk Lee
IPC分类号： H04Q7/20
CPC分类号： G01S11/10 , H04W64/006
摘要： Disclosed is a method for estimating the velocity of a mobile station in Rician fading environments in which a direct wave exists. Cellular mobile communication environments include two environments, Rician fading environments in which a direct wave exists and Rayleigh fading environments in which a direct wave does not exist. Generally, many methods for estimating the velocity of a mobile station have been known in Rayleigh fading environments. However, in Rician fading environments in which a direct wave exists, many errors occurs in estimating the velocity of a mobile station due to difficulty in estimation of a Rician coefficient K and an incident angle θ0. According to the invention, a method is provided wherein error is mostly eliminated in estimating the velocity of a mobile station by obtaining a maximum Doppler frequency of the mobile station, even without directly obtaining a Rician coefficient K and an incident angle θ0.
摘要翻译：公开了一种用于估计在存在直接波的Rician衰落环境中的移动台的速度的方法。蜂窝移动通信环境包括两个环境，其中存在直接波的Rician衰落环境和不存在直接波的瑞利衰落环境。通常，用于估计移动台的速度的许多方法在瑞利衰落环境中是已知的。然而，在存在直接波的Rician衰落环境中，由于难以估计Rician系数K和入射角θ0，在估计移动台的速度时出现许多错误。根据本发明，提供了一种方法，其中即使没有直接获得Rician系数K和入射角θ0，通过获得移动台的最大多普勒频率来估计移动台的速度，大多数地消除了误差。

12. 发明申请

US20060153060A1 Method of reducing feedback channel state information within adaptive ofdma system and adaptive ofdma system using the same 失效
标题翻译：减少自适应系统中的反馈信道状态信息的方法和使用该方法的自适应系统
公开(公告)号：US20060153060A1
公开(公告)日：2006-07-13
申请号：US10545047
申请日：2004-02-09
申请人： Myeon-Gyun Cho
发明人： Myeon-Gyun Cho
IPC分类号： H04B7/00 , H04J11/00 , H04B1/00
CPC分类号： H04L1/0026 , H04B7/0619 , H04L1/0003 , H04L1/0009 , H04L1/0027 , H04L5/023 , H04L27/2601
摘要： A method of reducing channel state information fed back in an adaptive orthogonal frequency division multiple access system when transmitting and receiving data packets between a base station and a mobile station using an orthogonal frequency division multiplexing method comprising adaptive modulation and coding. The method includes: transmitting a data packet comprising information as to whether adaptive modulation and coding is on or off from the base station to the mobile station via a downlink; and tracking a modulation and coding scheme level only when it is determined that adaptive modulation and coding is performed based on the information as to whether adaptive modulation and coding is on or off and feeding back the channel state information obtained from the tracking result from the mobile station to the base station via an uplink.
摘要翻译：一种在使用包括自适应调制和编码的正交频分复用方法在基站和移动台之间发送和接收数据分组时减少在自适应正交频分多址系统中反馈的信道状态信息的方法。该方法包括：经由下行链路，从基站向移动台发送包括关于自适应调制和编码是开启还是关闭的信息的数据分组; 以及仅当基于关于自适应调制和编码开启或关闭的信息确定执行自适应调制和编码时才跟踪调制和编码方案级别，并且从移动台反馈从跟踪结果获得的信道状态信息通过上行链路站到基站。

13. 发明申请

US20080096488A1 Apparatus and method for transmitting and receiving data in a communication system 审中-公开
标题翻译：用于在通信系统中发送和接收数据的装置和方法
公开(公告)号：US20080096488A1
公开(公告)日：2008-04-24
申请号：US11645415
申请日：2006-12-26
申请人： Myeon-Gyun Cho , Sung-Jin Kim , Ho-Jin Kim , In-Soo Hwang
发明人： Myeon-Gyun Cho , Sung-Jin Kim , Ho-Jin Kim , In-Soo Hwang
IPC分类号： H04B1/00 , H04B1/02
CPC分类号： H04B7/0417 , H04B7/0632
摘要： For data transmission/reception in a communication system, a transmitter precodes data to be transmitted via at least two antennas, with use of at least one precoding matrix of a predetermined rank, and transmits the precoded data to a receiver. A receiver receives a signal which is precoded with a precoding matrix of a predetermined rank, detects the precoding matrix, calculates a sum rate corresponding to the detected precoding matrix, and feeds back quality information on a channel formed between a transmitter and the receiver when the calculated sum rate falls within a predetermined rank among sum rates calculated for all precoding matrixes.
摘要翻译：对于通信系统中的数据发送/接收，发送器利用至少一个预定等级的预编码矩阵，经由至少两个天线来对数据进行发送，并将预编码的数据发送到接收机。接收机接收用预定秩的预编码矩阵预编码的信号，检测预编码矩阵，计算与检测到的预编码矩阵相对应的和速率，并且当发送机与接收机之间形成的信道上的质量信息反馈时计算出的和速率落入针对所有预编码矩阵计算的总和速率之内的预定等级。

14. 发明申请

US20070249401A1 Method for transmitting data in a communication system 有权
标题翻译：在通信系统中发送数据的方法
公开(公告)号：US20070249401A1
公开(公告)日：2007-10-25
申请号：US11702907
申请日：2007-02-06
申请人： Sung-Jin Kim , Myeon-Gyun Cho , Ho-Jin Kim
发明人： Sung-Jin Kim , Myeon-Gyun Cho , Ho-Jin Kim
IPC分类号： H04M1/00
CPC分类号： H04B7/0452 , H04B7/063 , H04B7/0632 , H04B7/0689 , H04B7/0691
摘要： A method is provided a method for transmitting data in a MIMO communication system. The method includes receiving feedback information including channel quality information of transmission antennas from terminals; selecting one of a multi-user mode and a single user mode according to the channel quality information; extracting information for the selected mode from the feedback information; selecting at least one terminal and a preceding matrix of at least one transmission antenna through which data is transmitted according to the extracted information and the selected mode; and transmitting data using the selected precoding matrix and information of the selected terminal.
摘要翻译：提供了一种在MIMO通信系统中发送数据的方法。该方法包括从终端接收包括发送天线的信道质量信息的反馈信息; 根据信道质量信息选择多用户模式和单用户模式之一; 从反馈信息中提取所选模式的信息; 根据所提取的信息和所选择的模式，选择数据被发送的至少一个发射天线的至少一个终端和前一矩阵; 以及使用所选择的预编码矩阵和所选择的终端的信息来发送数据。

15. 发明申请

US20050282499A1 Velocity estimation apparatus in mobile communication environments 有权
标题翻译：移动通信环境中的速度估计装置
公开(公告)号：US20050282499A1
公开(公告)日：2005-12-22
申请号：US11143074
申请日：2005-06-02
申请人： Goo-Hyun Park , Dae-Sik Hong , Ye-Hoon Lee , Eung-Sun Kim , Myeon-Gyun Cho , Jong-Hyeuk Lee
发明人： Goo-Hyun Park , Dae-Sik Hong , Ye-Hoon Lee , Eung-Sun Kim , Myeon-Gyun Cho , Jong-Hyeuk Lee
IPC分类号： H04B7/26 , G01S11/10 , G01S13/08 , H04B17/00 , H04W64/00
CPC分类号： G01S11/10 , H04W64/006
摘要： Disclosed is a method for estimating the velocity of a mobile station in Rician fading environments in which a direct wave exists. Cellular mobile communication environments include two environments, Rician fading environments in which a direct wave exists and Rayleigh fading environments in which a direct wave does not exist. Generally, many methods for estimating the velocity of a mobile station have been known in Rayleigh fading environments. However, in Rician fading environments in which a direct wave exists, many errors occurs in estimating the velocity of a mobile station due to difficulty in estimation of a Rician coefficient K and an incident angle θ0. According to the invention, a method is provided wherein error is mostly eliminated in estimating the velocity of a mobile station by obtaining a maximum Doppler frequency of the mobile station, even without directly obtaining a Rician coefficient K and an incident angle θ0.
摘要翻译：公开了一种用于估计在存在直接波的Rician衰落环境中的移动台的速度的方法。蜂窝移动通信环境包括两个环境，其中存在直接波的Rician衰落环境和不存在直接波的瑞利衰落环境。通常，用于估计移动台的速度的许多方法在瑞利衰落环境中是已知的。然而，在存在直接波的Rician衰落环境中，由于难以估计Rician系数K和入射角θ0而在估计移动台的速度时出现许多错误。根据本发明，提供了一种方法，其中通过获得移动台的最大多普勒频率来估计移动台的速度大多消除了误差，即使没有直接获得Rician系数K和入射角θ0 。

16. 发明授权

US07986972B2 Method for transmitting data in a communication system 有权
标题翻译：在通信系统中发送数据的方法
公开(公告)号：US07986972B2
公开(公告)日：2011-07-26
申请号：US11702907
申请日：2007-02-06
申请人： Sung-Jin Kim , Myeon-Gyun Cho , Ho-Jin Kim
发明人： Sung-Jin Kim , Myeon-Gyun Cho , Ho-Jin Kim
IPC分类号： H04M1/00
CPC分类号： H04B7/0452 , H04B7/063 , H04B7/0632 , H04B7/0689 , H04B7/0691
摘要： A method is provided a method for transmitting data in a MIMO communication system. The method includes receiving feedback information including channel quality information of transmission antennas from terminals; selecting one of a multi-user mode and a single user mode according to the channel quality information; extracting information for the selected mode from the feedback information; selecting at least one terminal and a preceding matrix of at least one transmission antenna through which data is transmitted according to the extracted information and the selected mode; and transmitting data using the selected precoding matrix and information of the selected terminal.
摘要翻译：提供了一种在MIMO通信系统中发送数据的方法。该方法包括从终端接收包括发送天线的信道质量信息的反馈信息; 根据信道质量信息选择多用户模式和单用户模式之一; 从反馈信息中提取所选模式的信息; 根据所提取的信息和所选择的模式，选择数据被发送的至少一个发射天线的至少一个终端和前一矩阵; 以及使用所选择的预编码矩阵和所选择的终端的信息来发送数据。

17. 发明申请

US20080101491A1 Method for transmitting signal in wireless communication system 有权
标题翻译：在无线通信系统中发送信号的方法
公开(公告)号：US20080101491A1
公开(公告)日：2008-05-01
申请号：US11981981
申请日：2007-10-31
申请人： Sang-Min Lee , Myeon-Gyun Cho , Yu-Seok Kim , Keum-Chan Whang , Jae-Won Kang , Sun-Young Lee
发明人： Sang-Min Lee , Myeon-Gyun Cho , Yu-Seok Kim , Keum-Chan Whang , Jae-Won Kang , Sun-Young Lee
IPC分类号： H04L27/28
CPC分类号： H04L27/0008 , H04L5/0007 , H04L5/0044
摘要： A method for transmitting a signal in a wireless communication system. The method comprises the steps of: grouping two subcarriers having different channel characteristics; identifying a number of all cases occurring when either equal symbols or different symbols, among symbols determined upon applying a first modulation scheme, are mapped to the two subcarriers; and mapping two subcarriers corresponding to each of the number of all cases to one symbol according to a second modulation scheme, and transmitting the signal, wherein a modulation order of the second modulation scheme is two times higher than a modulation order of the second modulation.
摘要翻译：一种在无线通信系统中发送信号的方法。该方法包括以下步骤：对具有不同信道特性的两个子载波进行分组; 识别当在应用第一调制方案确定的符号中的任一个相等符号或不同符号时发生的所有情况的数量被映射到两个子载波; 以及根据第二调制方案将与所有情况中的每一个对应的两个子载波映射到一个符号，并且发送所述信号，其中所述第二调制方案的调制阶数是所述第二调制的调制阶数的两倍。

18. 发明授权

US07120440B2 Velocity estimation apparatus and method using level crossing rate 有权
标题翻译：速度估计装置和方法使用等级穿越率
公开(公告)号：US07120440B2
公开(公告)日：2006-10-10
申请号：US10822130
申请日：2004-04-09
申请人： Myeon-Gyun Cho , Daesik Hong
发明人： Myeon-Gyun Cho , Daesik Hong
IPC分类号： H04Q7/20
CPC分类号： G01S11/02 , H04W36/32 , H04W64/006
摘要： Disclosed is a velocity estimator using a level crossing rate. The velocity estimator comprises a power calculator for calculating power values of a signal received from a mobile terminal; a mean power calculator for calculating mean power values for M power values according to a predetermined down-sampling factor M; an interpolator for interpolating the mean power values according to a predetermined interpolation ratio L; a root mean square calculator for calculating a root mean square value using an output of the interpolator; a level crossing counter for counting a level crossing frequency representing how many times the output of the interpolator crosses a level crossing threshold determined according to the root mean square value, for a predetermined time period; and a velocity calculator for calculating a velocity estimation value of the mobile terminal using the level crossing frequency.
摘要翻译：公开了使用等级穿越率的速度估计器。速度估计器包括：功率计算器，用于计算从移动终端接收的信号的功率值; 平均功率计算器，用于根据预定的下采样因子M计算M个功率值的平均功率值; 内插器，用于根据预定的插值比率L内插所述平均功率值; 使用内插器的输出来计算均方根值的均方根计算器; 一个电平交叉计数器，用于计数表示在根据均方根值确定的内插器的输出跨越多少倍的电平交叉频率的电平交叉频率; 以及速度计算器，用于使用所述电平交叉频率来计算所述移动终端的速度估计值。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式