公开(公告)号：US20060268814A1

公开(公告)日：2006-11-30

申请号：US11392407

申请日：2006-03-29

申请人： Jae-Hak Chung ,  Ji-Won Kang ,  Ye-Hoon Lee ,  Seung-Hoon Nam ,  Chung-Yong Lee ,  Hak-Ju Lee

发明人： Jae-Hak Chung ,  Ji-Won Kang ,  Ye-Hoon Lee ,  Seung-Hoon Nam ,  Chung-Yong Lee ,  Hak-Ju Lee

IPC分类号： H04B7/212

CPC分类号： H04W72/1257 ,  H04B7/0452 ,  H04L1/0003 ,  H04L1/0009 ,  H04L5/0075 ,  H04W72/1231

摘要： Provided is a scheduling apparatus and method for allocating resources to individual users in a multiantenna system. An upper layer determines resources to allocate to respective users one a long term, and provides the ratio to a scheduler. Then the scheduler determines coefficients appropriate for the provided ratio. On the assumption that a statistical channel characteristic for a user is constant for a predetermined time, the scheduler determines a channel capacity average and a standard deviation for the user. The scheduler schedules resource allocation for individual users according to the channel capacity average and standard deviation values, which are the statistical characteristic values, and instantaneous channel capacity fed back for the individual users, together with the found coefficients.

摘要翻译： 提供了一种用于在多天线系统中向各个用户分配资源的调度装置和方法。 上层确定长期分配给相应用户的资源，并将比例提供给调度器。 然后调度器确定适合所提供的比率的系数。 假设用户的统计信道特性在预定时间内是恒定的，则调度器确定用户的信道容量平均值和标准偏差。 调度器根据作为统计特征值的信道容量平均值和标准差值，以及针对各个用户反馈的瞬时信道容量，连同所找到的系数，为个体用户调度资源分配。

公开(公告)号：US08064428B2

公开(公告)日：2011-11-22

申请号：US11503289

申请日：2006-08-11

申请人： Yeheskel Bar-Ness ,  Ye-Hoon Lee ,  Dong-Ho Kim ,  Guillem Malagarriga

发明人： Yeheskel Bar-Ness ,  Ye-Hoon Lee ,  Dong-Ho Kim ,  Guillem Malagarriga

IPC分类号： H04J3/24

CPC分类号： H04B7/0669 ,  H04B7/0623 ,  H04B7/0697 ,  H04B7/0848 ,  H04L1/0009 ,  H04L1/0625 ,  H04L1/0668 ,  H04L1/1607 ,  H04L1/1812 ,  H04L1/1819 ,  H04L1/1845 ,  H04L1/1867

摘要： A method is provided for ordering retransmissions in a Multi-Input Multi-Output (MIMO) system using N×M antennas. A transmitter splits a coded data stream into N sub-packets, and transmits the N sub-packets to a receiver via N transmission antennas. The receiver removes interferences of the N sub-packets received via M reception antennas, and independently decodes the interference-removed sub-packets. The receiver transmits an acknowledgement (ACK) or a negative acknowledgement (NACK) to the transmitter based on errors included in the decoded sub-packets. Upon receipt of the NACK, the transmitter retransmits to the receiver a sub-packet retransmission using ordering based on an Alamouti space-time coding scheme.

摘要翻译： 提供了一种使用N×M个天线在多输入多输出（MIMO）系统中排序重传的方法。 发送器将编码数据流分解成N个子分组，并且经由N个发送天线将N个子分组发送到接收机。 接收器去除经由M个接收天线接收到的N个子分组的干扰，并且独立地解码干扰消除的子分组。 接收机基于解码的子分组中包含的错误向发射机发送确认（ACK）或否定确认（NACK）。 在接收到NACK时，发射机基于Alamouti时空编码方案使用排序向接收机重发子分组。

公开(公告)号：US07630380B2

公开(公告)日：2009-12-08

申请号：US11392407

申请日：2006-03-29

申请人： Jae-Hak Chung ,  Ji-Won Kang ,  Ye-Hoon Lee ,  Seung-Hoon Nam ,  Chung-Yong Lee ,  Hak-Ju Lee

发明人： Jae-Hak Chung ,  Ji-Won Kang ,  Ye-Hoon Lee ,  Seung-Hoon Nam ,  Chung-Yong Lee ,  Hak-Ju Lee

IPC分类号： H04L12/28

CPC分类号： H04W72/1257 ,  H04B7/0452 ,  H04L1/0003 ,  H04L1/0009 ,  H04L5/0075 ,  H04W72/1231

摘要： Provided is a scheduling apparatus and method for allocating resources to individual users in a multiantenna system. The method includes determining a ratio of time slots to be allocated according to a ratio desired by each of the terminals in every specific time slot interval, calculating a channel capacity average and a standard deviation for each terminal according to channel capacity reported from each terminal for a specific time, and determining, based on the determined ratio of time slots, a terminal to which a specific time slot is to be allocated according to the channel capacity average and the standard deviation, calculated for each terminal, and the last reported channel capacity.

摘要翻译： 提供了一种用于在多天线系统中向各个用户分配资源的调度装置和方法。 该方法包括根据每个特定时隙间隔中的每个终端所期望的比率来确定要分配的时隙的比率，根据从每个终端报告的信道容量来计算每个终端的信道容量平均值和标准偏差 并且根据所确定的时隙比例，根据对每个终端计算的信道容量平均值和标准偏差以及最后报告的信道容量来确定要分配特定时隙的终端 。

公开(公告)号：US20070115864A1

公开(公告)日：2007-05-24

申请号：US11503289

申请日：2006-08-11

申请人： Yeheskel Bar-Ness ,  Ye-Hoon Lee ,  Dong-Ho Kim ,  Guillem Malagarriga

发明人： Yeheskel Bar-Ness ,  Ye-Hoon Lee ,  Dong-Ho Kim ,  Guillem Malagarriga

IPC分类号： H04B7/005 ,  H04Q7/00

CPC分类号： H04B7/0669 ,  H04B7/0623 ,  H04B7/0697 ,  H04B7/0848 ,  H04L1/0009 ,  H04L1/0625 ,  H04L1/0668 ,  H04L1/1607 ,  H04L1/1812 ,  H04L1/1819 ,  H04L1/1845 ,  H04L1/1867

摘要： A method is provided for ordering retransmissions in a Multi-Input Multi-Output (MIMO) system using N×M antennas. A transmitter splits a coded data stream into N sub-packets, and transmits the N sub-packets to a receiver via N transmission antennas. The receiver removes interferences of the N sub-packets received via M reception antennas, and independently decodes the interference-removed sub-packets. The receiver transmits an acknowledgement (ACK) or a negative acknowledgement (NACK) to the transmitter based on errors included in the decoded sub-packets. Upon receipt of the NACK, the transmitter retransmits to the receiver a sub-packet retransmission using ordering based on an Alamouti space-time coding scheme.

摘要翻译： 提供了一种用于使用N×M个天线在多输入多输出（MIMO）系统中排序重传的方法。 发送器将编码数据流分解成N个子分组，并且经由N个发送天线将N个子分组发送到接收机。 接收器去除经由M个接收天线接收到的N个子分组的干扰，并且独立地解码干扰消除的子分组。 接收机基于解码的子分组中包含的错误向发射机发送确认（ACK）或否定确认（NACK）。 在接收到NACK时，发射机基于Alamouti时空编码方案使用排序向接收机重发子分组。

公开(公告)号：US20060098754A1

公开(公告)日：2006-05-11

申请号：US11256251

申请日：2005-10-21

申请人： Sung-Jin Kim ,  Ye-Hoon Lee ,  Ho-Jin Kim ,  Kwang-Bok Lee

发明人： Sung-Jin Kim ,  Ye-Hoon Lee ,  Ho-Jin Kim ,  Kwang-Bok Lee

IPC分类号： H04B7/02

CPC分类号： H04B7/0617 ,  H04B7/0417 ,  H04B7/0426 ,  H04B7/0443 ,  H04B7/0626 ,  H04B7/0691 ,  H04W52/42

摘要： A beam and power allocation method for a MIMO system transmitting multiple data streams from a transmitter having a plurality of transmit antennas to a receiver having at least two receive antennas, the transmit antennas being grouped based on feedback information from the receiver, includes obtaining covariance matrices for respective transmit antenna group, and allocating beam and power to the transmit antenna groups according to the covariance matrices of the respective antenna groups. The power allocation method can be adapted to various partial beamforming techniques by generalizing the optimization problem as a function of transmit covariance matrices.

摘要翻译： 一种用于MIMO系统的波束和功率分配方法，所述MIMO系统从具有多个发射天线的发射机向具有至少两个接收天线的接收机发射多个数据流，所述发射天线基于来自所述接收机的反馈信息分组，包括获得协方差矩阵 并且根据各个天线组的协方差矩阵将波束和功率分配给发射天线组。 功率分配方法可以通过将优化问题概括为发射协方差矩阵的函数来适应各种部分波束成形技术。

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 。

公开(公告)号：US07860179B2

公开(公告)日：2010-12-28

申请号：US12349219

申请日：2009-01-06

申请人： Yeheskel Bar-Ness ,  Ye-Hoon Lee

发明人： Yeheskel Bar-Ness ,  Ye-Hoon Lee

IPC分类号： H04L1/02 ,  H04B7/00

CPC分类号： H04W52/42 ,  H04L27/2608

摘要： Practical transmission power adaptation in multicarrier code division multiple access (MC-CDMA) communications is using either a frequency domain technique or a time domain technique or a combined frequency and time domain technique in response to channel variations. With frequency domain power adaptation, the transmission power is allocated over the N′ (1≦N′≦N) strongest subcarriers rather than over all possible N subcarriers, where the strongest subcarriers are understood to exhibit the highest channel gains. A substantially optimal N′ can be chosen so that the average bit error rate (BER) is minimized. In the time domain power adaptation technique, transmission power is adapted so that the desired signal strength at the receiver output is maintained at a fixed level. In the combined time and frequency domain adaptation technique, the transmission power is first allocated over the N′ (1≦N′≦N) strongest subcarriers rather than over all possible N subcarriers and then it is adapted so that the desired signal strength at the receiver output is maintained at a fixed level.

摘要翻译： 多载波码分多址（MC-CDMA）通信中的实际发射功率适配采用频域技术或时域技术，或者采用组合频域和时域技术来响应信道变化。 通过频域功率自适应，发射功率分配在N'（1＆nlE; N'和nlE; N）个最强子载波上，而不是在所有可能的N个子载波上分配，其中最强子载波被理解为呈现最高信道增益。 可以选择基本上最佳的N'，使得平均误码率（BER）被最小化。 在时域功率自适应技术中，发射功率被适配成使得接收机输出端的期望信号强度保持在固定的水平。 在组合的时域和频域自适应技术中，首先在N'（1＆nlE; N'和nlE; N）个最强子载波上分配发射功率，而不是在所有可能的N个子载波上分配发射功率，然后将其适应于 接收机输出保持在固定的水平。

公开(公告)号：US20090147749A1

公开(公告)日：2009-06-11

申请号：US12349219

申请日：2009-01-06

申请人： Yeheskel Bar-Ness ,  Ye-Hoon Lee

发明人： Yeheskel Bar-Ness ,  Ye-Hoon Lee

IPC分类号： H04W52/00 ,  H04B7/216 ,  H04B7/02

CPC分类号： H04W52/42 ,  H04L27/2608

摘要： Practical transmission power adaptation in multicarrier code division multiple access (MC-CDMA) communications is using either a frequency domain technique or a time domain technique or a combined frequency and time domain technique in response to channel variations. With frequency domain power adaptation, the transmission power is allocated over the N′ (1≦N′≦N) strongest subcarriers rather than over all possible N subcarriers, where the strongest subcarriers are understood to exhibit the highest channel gains. A substantially optimal N′ can be chosen so that the average bit error rate (BER) is minimized. In the time domain power adaptation technique, transmission power is adapted so that the desired signal strength at the receiver output is maintained at a fixed level. In the combined time and frequency domain adaptation technique, the transmission power is first allocated over the N′ (1≦N′≦N) strongest subcarriers rather than over all possible N subcarriers and then it is adapted so that the desired signal strength at the receiver output is maintained at a fixed level.

摘要翻译： 多载波码分多址（MC-CDMA）通信中的实际发射功率适配采用频域技术或时域技术，或者采用组合频域和时域技术来响应信道变化。 通过频域功率自适应，发射功率分配在N'（1 <= N'<= N）个最强子载波上，而不是在所有可能的N个子载波上分配，其中最强子载波被理解为呈现最高信道增益。 可以选择基本上最佳的N'，使得平均误码率（BER）被最小化。 在时域功率自适应技术中，发射功率被适配成使得接收机输出端的期望信号强度保持在固定的水平。 在组合的时域和频域适应技术中，首先在N'（1 <= N'<= N）个最强子载波上分配发射功率，而不是在所有可能的N个子载波上分配发射功率，然后适配使得所需的信号强度 在接收机输出端保持固定的电平。

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。

公开(公告)号：US20070162816A1

公开(公告)日：2007-07-12

申请号：US11582007

申请日：2006-10-17

申请人： Dong-Ho Kim ,  Ye-Hoon Lee ,  Nam-Shik Kim ,  Hyun-Cheol Park ,  Cheol-Woo You

发明人： Dong-Ho Kim ,  Ye-Hoon Lee ,  Nam-Shik Kim ,  Hyun-Cheol Park ,  Cheol-Woo You

IPC分类号： H03M13/00

CPC分类号： H03M13/033 ,  H03M13/116 ,  H03M13/118

摘要： A method for generating a parity check matrix of a Low Density Parity Check (LDPC) code. A base matrix is generated in which elements with a value of 1 are arranged at predefined distances. The elements with the value of 1 in the base matrix are replaced with predefined sub-matrices. The method can improve the performance of the LDPC code by implementing the parity check matrix in which the number of 4-cycles or 6-cycles adversely affecting the LDPC code performance is minimized.

摘要翻译： 一种用于生成低密度奇偶校验（LDPC）码的奇偶校验矩阵的方法。 生成基本矩阵，其中值为1的元素以预定距离排列。 在基本矩阵中具有值1的元素被预定义的子矩阵替代。 该方法可以通过实现对LDPC码性能有不利影响的4个周期或6个周期数的奇偶校验矩阵来提高LDPC码的性能。