公开(公告)号：US07978798B2

公开(公告)日：2011-07-12

申请号：US11499164

申请日：2006-08-04

申请人： Keun-Chul Hwang ,  Soong-Yoon Choi ,  Jae-Kwon Kim ,  Cheol-Woo You

发明人： Keun-Chul Hwang ,  Soong-Yoon Choi ,  Jae-Kwon Kim ,  Cheol-Woo You

IPC分类号： H04B1/10

CPC分类号： H04B7/0697 ,  H04L1/0631 ,  H04L25/0204

摘要： Provided are a spatial multiplexing apparatus and method in a Multiple Input Multiple Output (MIMO) system. The spatial multiplexing detection method includes estimating channels of a received signal, and sorting the estimated channels in descending order according to a scheme; generating a subsystem of a minimum unit by nulling an arbitrary channel among the sorted channels; performing a modified maximum likelihood (MML) in the subsystem of the minimum unit to calculate a number of transmission signal vectors; and calculating Euclidean distances of the number of the transmission signal vectors, and selecting a transmission signal vector having a minimum Euclidean distance. Accordingly, the receiver exhibits a performance level similar to a Maximum Likelihood (ML) and can obtain the complexity similar to successive interference cancellation (SIC).

摘要翻译： 提供了一种多输入多输出（MIMO）系统中的空间复用装置和方法。 空间复用检测方法包括估计接收信号的信道，并按照方案按降序对估计信道进行排序; 通过使排序的频道中的任意频道舍弃来生成最小单位的子系统; 在最小单位的子系统中执行修改的最大似然（MML）以计算传输信号向量的数量; 并计算发送信号向量的欧几里得距离，并选择具有最小欧几里德距离的发送信号向量。 因此，接收机呈现类似于最大似然（ML）的性能水平，并且可以获得与连续干扰消除（SIC）类似的复杂度。

公开(公告)号：US07941186B2

公开(公告)日：2011-05-10

申请号：US11782629

申请日：2007-07-24

申请人： Myeon-Kyun Cho ,  Sung-Jin Kim ,  Ho-Jin Kim ,  Cheol-Woo You

发明人： Myeon-Kyun Cho ,  Sung-Jin Kim ,  Ho-Jin Kim ,  Cheol-Woo You

IPC分类号： H04M1/00 ,  H04W4/00 ,  H04B7/216

CPC分类号： H04W72/085 ,  H04B7/0452 ,  H04B7/0632 ,  H04B7/0697 ,  H04L1/0026

摘要： An apparatus and method for scheduling a multiuser and a single user in a Multiple Input Multiple Output (MIMO) system are provided. The method for scheduling a multiuser and a single user at BS in MIMO system includes determining ratios of MultiUser-MIMO (MU-MIMO) chunks and Single User-MIMO (SU-MIMO) chunks to allocation chunks, determining the MU-MIMO chunks in the determined ratio and the remaining chunks as the SU-MIMO chunks, transmitting chunk information relating to the determined chunks to one or more Mobile Stations (MSs), and, when Channel Quality Information (CQI) feedback information relating to the determined MU-MIMO chunks and the determined SU-MIMO chunks is received from the MSs, allocating chunks and streams for MU-MIMO/SU-MIMO to users who maximize overall capacity using the CQI feedback information.

摘要翻译： 提供了一种用于在多输入多输出（MIMO）系统中调度多用户和单个用户的装置和方法。 在MIMO系统中在BS处调度多用户和单个用户的方法包括：将多用户MIMO（MU-MIMO）块和单用户MIMO（SU-MIMO）块的比率确定为分组块，确定MU-MIMO块中的MU-MIMO块 确定的比率和剩余的块作为SU-MIMO块，将与所确定的块相关的块信息发送到一个或多个移动站（MS），以及当与确定的MU-MIMO相关的信道质量信息（CQI）反馈信息 块，并且从MS接收确定的SU-MIMO块，将用于MU-MIMO / SU-MIMO的块和流分配给使用CQI反馈信息最大化总体容量的用户。

公开(公告)号：US07796997B2

公开(公告)日：2010-09-14

申请号：US11508049

申请日：2006-08-22

申请人： Eung-Sun Kim ,  Yung-Soo Kim ,  Cheol-Woo You ,  Jong-Hyung Kwun

发明人： Eung-Sun Kim ,  Yung-Soo Kim ,  Cheol-Woo You ,  Jong-Hyung Kwun

IPC分类号： H04W88/02

CPC分类号： H04W48/12 ,  H04W72/048

摘要： Disclosed is a cellular-based wireless communication system, and more particularly a method for allocating resources for data transmission in a cellular-based wireless communication system employing a multicarrier scheme. Frequency resources are divided into time slots defined by one frame and the divided time slots are allocated to an uplink and the downlink. During a predetermined time period, the frequency resources are allocated as resources for transmitting sync preambles. During a next predetermined time period, the frequency resources are allocated in such a manner that the frequency resources for sectors are successively and repeatedly used as resources for transmitting broadcasting messages on a sector-by-sector basis. In the remaining time slots, except the time slots for transmitting the preambles and the broadcasting messages, the frequency resources are allocated as resources for transmitting channel estimation midambles for dynamic channel allocation.

摘要翻译： 公开了一种基于蜂窝的无线通信系统，更具体地，涉及一种在采用多载波方案的基于蜂窝的无线通信系统中为数据传输分配资源的方法。 频率资源划分为一帧定义的时隙，分配的时隙分配给上行链路和下行链路。 在预定时间段期间，频率资源被分配为用于发送同步前导码的资源。 在下一个预定时间段期间，频率资源被分配成使得用于扇区的频率资源被连续和重复地用作用于逐扇区地发送广播消息的资源。 在剩余时隙中，除了用于发送前导码和广播消息的时隙之外，频率资源被分配为用于发送用于动态信道分配的信道估计中间码的资源。

公开(公告)号：US20070201576A1

公开(公告)日：2007-08-30

申请号：US11703598

申请日：2007-02-07

申请人： In-Soo Hwang ,  Cheol-Woo You ,  Jin-Gon Joung ,  Yong-Hoon Lee ,  Yong-Up Jang ,  Won-Yong Shin

发明人： In-Soo Hwang ,  Cheol-Woo You ,  Jin-Gon Joung ,  Yong-Hoon Lee ,  Yong-Up Jang ,  Won-Yong Shin

IPC分类号： H04L1/02

CPC分类号： H04B7/0854 ,  H04B7/0417 ,  H04B7/0617

摘要： Provided are a system and a method for transmitting/receiving data in a communication system. The method includes calculating a processing matrix of a transmission unit for transmitting data, a processing matrix of a reception unit for receiving the data, a channel matrix formed by a plurality of transmission antennas and a plurality of reception antennas, and a parameter of the transmission data, when the data to be transmitted to the plurality of reception antennas via the plurality of transmission antennas is generated; determining a minimum value of a Minimum Mean Square Error (MMSE) according to the calculated matrixes and parameter; and transmitting/receiving the data using an MMSE multiplexing scheme based on the determined minimum MMSE value.

摘要翻译： 提供一种用于在通信系统中发送/接收数据的系统和方法。 该方法包括：计算用于发送数据的发送单元的处理矩阵，接收数据的接收单元的处理矩阵，由多个发送天线和多个接收天线形成的信道矩阵，以及发送的参数 当经由多个发送天线发送到多个接收天线的数据时，生成数据; 根据计算的矩阵和参数确定最小均方误差（MMSE）的最小值; 以及基于所确定的最小MMSE值使用MMSE复用方案来发送/接收数据。

公开(公告)号：US20070086549A1

公开(公告)日：2007-04-19

申请号：US11543387

申请日：2006-10-05

申请人： Jae-Kwon Kim ,  Yung-Soo Kim ,  Cheol-Woo You ,  Sung-Kwon Hong ,  Mazzarese David ,  Soong-Yoon Choi ,  Gun-Chul Hwang

发明人： Jae-Kwon Kim ,  Yung-Soo Kim ,  Cheol-Woo You ,  Sung-Kwon Hong ,  Mazzarese David ,  Soong-Yoon Choi ,  Gun-Chul Hwang

IPC分类号： H04L1/02

CPC分类号： H04B7/04 ,  H04L25/03006

摘要： Detection of a signal in a receiver of a MIMO communication system includes a transmitter for signals transmission via K antennas and a receiver for receiving the signals via L reception antennas, such that L is greater than or equal to K and the system has a K×L-dimensional channel matrix, by converting the channel matrix into a plurality of matrixes having an upper triangle structure; dividing each of the matrixes into at least two sub-matrixes having a dimension lower than that of the channel matrix; detecting transmission symbols from corresponding antennas through decoding of a) lowest sub-matrix signal received which sub-matrix is constituted of components having only the channel characteristics of two antennas among the two sub-matrixes; and b) an upper sub-matrix signal using the transmission symbols; and outputting all of the detected transmission symbols, if transmission symbols by a highest sub-matrix among at least two sub-matrixes are detected.

摘要翻译： MIMO通信系统的接收机中的信号的检测包括：用于通过K个天线进行信号传输的发射机和用于经由L个接收天线接收信号的接收机，使得L大于或等于K，并且系统具有KxL- 通过将信道矩阵转换为具有上三角形结构的多个矩阵; 将每个矩阵划分成具有小于信道矩阵的维度的至少两个子矩阵; 通过对所接收到的最小子矩阵信号进行解码来检测来自相应天线的传输符号，哪个子矩阵由仅具有两个子矩阵中的两个天线的信道特性的分量构成; 以及b）使用所述发送符号的上部子矩阵信号; 并且如果检测到在至少两个子矩阵中的最高子矩阵的传输符号，则输出所有检测到的传输符号。

公开(公告)号：US07826571B2

公开(公告)日：2010-11-02

申请号：US11543387

申请日：2006-10-05

申请人： Jae-Kwon Kim ,  Yung-Soo Kim ,  Cheol-Woo You ,  Sung-Kwon Hong ,  Mazzarese David ,  Soong-Yoon Choi ,  Gun-Chul Hwang

发明人： Jae-Kwon Kim ,  Yung-Soo Kim ,  Cheol-Woo You ,  Sung-Kwon Hong ,  Mazzarese David ,  Soong-Yoon Choi ,  Gun-Chul Hwang

IPC分类号： H04L1/02

CPC分类号： H04B7/04 ,  H04L25/03006

摘要： Detection of a signal in a receiver of a MIMO communication system includes a transmitter for signals transmission via K antennas and a receiver for receiving the signals via L reception antennas, such that L is greater than or equal to K and the system has a K×L-dimensional channel matrix, by converting the channel matrix into a plurality of matrixes having an upper triangle structure; dividing each of the matrixes into at least two sub-matrixes having a dimension lower than that of the channel matrix; detecting transmission symbols from corresponding antennas through decoding of a) lowest sub-matrix signal received which sub-matrix is constituted of components having only the channel characteristics of two antennas among the two sub-matrixes; and b) an upper sub-matrix signal using the transmission symbols; and outputting all of the detected transmission symbols, if transmission symbols by a highest sub-matrix among at least two sub-matrixes are detected.

摘要翻译： MIMO通信系统的接收机中的信号的检测包括用于经由K个天线的信号传输的发射机和用于经由L个接收天线接收信号的接收机，使得L大于或等于K，并且系统具有K× 通过将信道矩阵转换成具有上三角形结构的多个矩阵来生成L维信道矩阵; 将每个矩阵划分成具有小于信道矩阵的维度的至少两个子矩阵; 通过对所接收到的最小子矩阵信号进行解码来检测来自相应天线的传输符号，哪个子矩阵由仅具有两个子矩阵中的两个天线的信道特性的分量构成; 以及b）使用所述发送符号的上部子矩阵信号; 并且如果检测到在至少两个子矩阵中的最高子矩阵的传输符号，则输出所有检测到的传输符号。

公开(公告)号：US07808954B2

公开(公告)日：2010-10-05

申请号：US11603652

申请日：2006-11-22

申请人： Seung-Hoon Nam ,  Cheol-Woo You ,  In-Soo Hwang ,  Yung-Soo Kim ,  Tarokh Vahid

发明人： Seung-Hoon Nam ,  Cheol-Woo You ,  In-Soo Hwang ,  Yung-Soo Kim ,  Tarokh Vahid

IPC分类号： H04B7/216

CPC分类号： H04L1/0021 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0025

摘要： A system and method are provided for controlling a data rate in a communication system. A transmitter sets threshold values for classifying Modulation and Coding Scheme (MCS) levels. When receiving information about an MCS level desired to be used in the receiver, the transmitter sets an MCS level to be actually used in the receiver and transmits information about the set MCS level to the receiver. When detecting that the information is to be transmitted to the transmitter, the receiver computes instantaneous link capacity using a channel estimation result, sets an MCS level mapped to the instantaneous link capacity, and transmits information about the set MCS level to the transmitter. The receiver receives the information about the MCS level to be actually used from the transmitter.

摘要翻译： 提供了一种用于控制通信系统中的数据速率的系统和方法。 发射机设置用于分类调制和编码方案（MCS）级别的阈值。 当接收到有关希望在接收机中使用的MCS级别的信息时，发射机设置在接收机中实际使用的MCS级别，并将关于所设置的MCS级别的信息发送给接收机。 当检测到要将信息发送到发射机时，接收机使用信道估计结果计算瞬时链路容量，设置映射到瞬时链路容量的MCS级别，并将关于所设置的MCS级别的信息发送到发射机。 接收机从发射机接收关于实际使用的MCS级别的信息。

公开(公告)号：US07706351B2

公开(公告)日：2010-04-27

申请号：US11703266

申请日：2007-02-07

申请人： Cheol-Woo You ,  Eung-Sun Kim ,  Jong-Hyeuk Lee ,  Joo-Hwan Chun ,  Kyung-Chun Lee ,  Yung-Soo Kim

发明人： Cheol-Woo You ,  Eung-Sun Kim ,  Jong-Hyeuk Lee ,  Joo-Hwan Chun ,  Kyung-Chun Lee ,  Yung-Soo Kim

IPC分类号： H04B7/208

CPC分类号： H04L25/03343 ,  H04L5/023 ,  H04L25/0226 ,  H04L2025/03802

摘要： Disclosed is a method for transmitting an uplink signal by a mobile station in a mobile communication system using an OFDMA scheme. The method includes estimating a downlink channel status by using a signal received from a base station; determining a precoding matrix by using the estimated downlink channel status; and transmitting a signal obtained by multiplying an uplink signal to be transmitted by the precoding matrix to the base station.

摘要翻译： 公开了一种移动台在使用OFDMA方案的移动通信系统中发送上行链路信号的方法。 该方法包括：使用从基站接收的信号来估计下行链路信道状态; 通过使用所估计的下行链路信道状态来确定预编码矩阵; 并且将通过预编码矩阵发送的上行链路信号乘以基站而获得的信号。

公开(公告)号：US20070036068A1

公开(公告)日：2007-02-15

申请号：US11497583

申请日：2006-08-02

申请人： Myeon-Gyun Cho ,  Cheol-Woo You ,  Jong-Hyung Kwun

发明人： Myeon-Gyun Cho ,  Cheol-Woo You ,  Jong-Hyung Kwun

IPC分类号： H04J11/00 ,  H04J13/00

CPC分类号： H04L5/0017 ,  H04B1/713 ,  H04L5/0041 ,  H04L27/2605

摘要： A transmission apparatus and method for a communication system based on Orthogonal Frequency Division Multiplexing-Code Division Multiplexing (OFDM-CDM). A frequency spreader multiplies symbols to be transmitted by a frequency spreading factor and outputs frequency spread symbols whose number corresponds to the frequency spreading factor. Buffers whose number corresponds to the frequency spreading factor temporarily store the frequency spread symbols in a unit of a predefined number of symbols. A time spreader multiplies parallel frequency spread symbols from the buffers by a time spreading factor and outputs frequency-time spread symbols. An Inverse Fast Fourier Transform (IFFT) processor performs IFFT on the frequency-time spread symbols, and outputs an OFDM symbol. A Guard Interval (GI) inserter inserts a GI into a signal output from the IFFT processor and transmits the signal. The system can obtain complete diversity gain and residual gain due to the effect of a time-varying channel in any channel environment.

摘要翻译： 一种基于正交频分复用码分多路复用（OFDM-CDM）的通信系统的发送装置和方法。 频率扩展器将通过频率扩展因子发送的符号相乘，并输出数字对应于频率扩展因子的频率扩展符号。 其数量对应于频率扩展因子的缓冲器以预定数量的符号的单位临时存储频率扩展符号。 时间扩展器将来自缓冲器的并行频率扩展符号乘以时间扩展因子并输出频率 - 时间扩展符号。 逆快速傅里叶变换（IFFT）处理器对频率 - 时间扩展符号执行IFFT，并输出OFDM符号。 保护间隔（GI）插入器将GI插入从IFFT处理器输出的信号中并发送信号。 由于任何信道环境中时变信道的影响，系统可以获得完整的分集增益和剩余增益。