公开(公告)号：US20110183623A1

公开(公告)日：2011-07-28

申请号：US13010262

申请日：2011-01-20

申请人： Kai Yang ,  Chan-Byoung Chae ,  Doru Calin ,  Denis Rouffet ,  Simon Yiu

发明人： Kai Yang ,  Chan-Byoung Chae ,  Doru Calin ,  Denis Rouffet ,  Simon Yiu

IPC分类号： H04B15/00

CPC分类号： H04W72/082 ,  H04B7/0408 ,  H04W16/28 ,  H04W16/30 ,  H04W72/046

摘要： Example embodiments are directed to methods of reducing interference in a communication system. In at least one example embodiment, a method includes first determining, by a first transmitter having a multi-directional antenna configured to produce a plurality of beams, at least one interference level of at least one interfering beam of a plurality of beams of at least one transmitter in the communication system, second determining a transmitting beam pattern based on the interference level, the transmitting beam pattern indicating a sequence of illuminating the plurality of beams at corresponding time slots, third determining a fractional frequency reuse pattern based on the transmitting beam pattern, and transmitting data based on the transmitting beam pattern and the frequency reuse pattern.

摘要翻译： 示例性实施例涉及减少通信系统中的干扰的方法。 在至少一个示例性实施例中，一种方法包括首先由具有被配置为产生多个波束的多方向天线的第一发射机确定至少一个至少一个波束的至少一个干扰波束的至少一个干扰电平 通信系统中的一个发射机，基于干扰电平来第二确定发射波束图案，所述发射波束图案指示在相应时隙照射多个波束的序列，第三确定基于所述发射波束图案的分数频率复用模式 并且基于发送波束图案和频率重用模式发送数据。

公开(公告)号：US07218946B2

公开(公告)日：2007-05-15

申请号：US10342084

申请日：2003-01-14

申请人： In-Bum Chang ,  Ki-Ho Cho ,  Chan-Byoung Chae

发明人： In-Bum Chang ,  Ki-Ho Cho ,  Chan-Byoung Chae

IPC分类号： H04Q7/20 ,  H04B7/00 ,  H04B7/216

CPC分类号： H04W52/12

摘要： An outer loop power control apparatus and method in a mobile communication system are disclosed. If a first received frame has no errors and the raw BER of the first received frame is equal to or greater than a predetermined raw BER, a power control mode is changed to an adjustment mode. If a second received frame following the first received frame has no errors and the raw BER of the second received frame is less than the threshold raw BER in the adjustment mode, a target Eb/No is decreased by a product of a first step coefficient and a decrement unit. If the raw BER of the second received frame is equal to or greater than the threshold raw BER, the raw BERs of the first and second received frames are compared. If the raw BER of the second received frame is less than the raw BER of the first received frame, the target Eb/No is decreased by a product of a second step coefficient and the decrement unit.

摘要翻译： 公开了一种移动通信系统中的外环功率控制装置和方法。 如果第一接收帧没有错误，并且第一接收帧的原始BER等于或大于预定原始BER，则将功率控制模式改变为调整模式。 如果第一接收帧之后的第二接收帧没有错误，并且第二接收帧的原始BER小于调整模式中的阈值原始BER，则目标Eb / No减少乘以第一阶跃系数和 减量单位 如果第二接收帧的原始BER等于或大于阈值原始BER，则比较第一和第二接收帧的原始BER。 如果第二接收帧的原始BER小于第一接收帧的原始BER，则目标Eb / No由第二阶梯系数和减量单位的乘积减小。

公开(公告)号：US20070086540A1

公开(公告)日：2007-04-19

申请号：US11582172

申请日：2006-10-17

申请人： Chan-Byoung Chae ,  David Mazzarese ,  Sung-Ryul Yun

发明人： Chan-Byoung Chae ,  David Mazzarese ,  Sung-Ryul Yun

IPC分类号： H04L1/02

CPC分类号： H04B7/0697 ,  H04B7/0665 ,  H04B7/086

摘要： Provided is an apparatus and method for transmitting/receiving data in a multi-user multi-antenna communication system. A data transmitting apparatus and method computes a RX filter or a TX filter for each user receiver in an improved scheme, selects a codebook correlating with the computed TX filter or the computed RX filter, and transmits an index of the selected TX filter codebook or an index of the selected RX filter codebook to a receiver. A data receiving apparatus and method receives the codebook index and detects a corresponding RX filter from the codebook by using the received codebook index.

摘要翻译： 提供一种用于在多用户多天线通信系统中发送/接收数据的装置和方法。 数据发送装置和方法以改进方案计算每个用户接收机的RX滤波器或TX滤波器，选择与所计算的TX滤波器或所计算的RX滤波器相关的码本，并且发送所选择的TX滤波码本的索引或 所选RX滤波器码本的索引到接收机。 数据接收装置和方法通过使用接收到的码本索引从码本接收码本索引并检测相应的RX滤波器。

公开(公告)号：US20060268776A1

公开(公告)日：2006-11-30

申请号：US11441371

申请日：2006-05-25

申请人： Kyun-Byoung Ko ,  Won-Il Roh ,  Jeong-Tae Oh ,  Jae-Ho Jeon ,  Seung-Joo Maeng ,  Chan-Byoung Chae

发明人： Kyun-Byoung Ko ,  Won-Il Roh ,  Jeong-Tae Oh ,  Jae-Ho Jeon ,  Seung-Joo Maeng ,  Chan-Byoung Chae

IPC分类号： H04Q7/00

CPC分类号： H04B7/0452 ,  H04W72/00 ,  H04W72/08

摘要： An apparatus and method for selecting at least two users to be serviced in SDMA in an SDMA wireless communication system are provided. All users are ordered according to a predetermined rule and all possible user combinations each having at least two users are created from the ordered users. An investigation limit number is set using the capacity of a jth user combination. Or a total investigation number is reduced by comparing the interference-reflected SNR decrements of users with an investigation threshold. Therefore, the computation volume for selecting SDMA users is decreased.

摘要翻译： 提供了一种在SDMA无线通信系统中选择要在SDMA中服务的至少两个用户的装置和方法。 根据预定规则对所有用户进行排序，并且从订购的用户创建每个具有至少两个用户的所有可能的用户组合。 调查限制号码使用第 用户组合的容量来设定。 或者通过将用户的干扰反射SNR递减与调查阈值进行比较来减少总调查数。 因此，选择SDMA用户的计算量减少。

公开(公告)号：US20060120478A1

公开(公告)日：2006-06-08

申请号：US11274662

申请日：2005-11-15

申请人： Sung-Jin Kim ,  Ho-Jin Kim ,  Kwang-Bok Lee ,  Ki-Ho Kim ,  Hyoung-Woon Park ,  Jae-Hak Chung ,  Chan-Byoung Chae ,  Won-Il Roh

发明人： Sung-Jin Kim ,  Ho-Jin Kim ,  Kwang-Bok Lee ,  Ki-Ho Kim ,  Hyoung-Woon Park ,  Jae-Hak Chung ,  Chan-Byoung Chae ,  Won-Il Roh

IPC分类号： H04L1/02

CPC分类号： H04B7/0617 ,  H04B7/0417 ,  H04B7/0443 ,  H04B7/0452 ,  H04B7/0634

摘要： A multiple-input multiple-output (MIMO) communication system is provided for communication between a transmission apparatus having a plurality of transmission antennas and a reception apparatus having a plurality of reception antennas. The reception apparatus performs singular value decomposition (SVD) on channel information for a channel established to the transmission apparatus, and feeds back the SVD-decomposed channel information to the transmission apparatus. The transmission apparatus receives the SVD-decomposed channel information from the reception apparatus, performs QR decomposition on the received SVD-decomposed channel information, and sets multiple transmission antennas to be allocated to the channel, thereby performing beamforming.

摘要翻译： 提供了一种多输入多输出（MIMO）通信系统，用于具有多个发送天线的发送装置与具有多个接收天线的接收装置之间的通信。 接收装置对发送装置建立的信道的信道信息进行奇异值分解（SVD），并将SVD分解信道信息反馈给发送装置。 发送装置从接收装置接收SVD分解信道信息，对所接收的SVD分解信道信息进行QR分解，并设定要分配给信道的多个发送天线，从而进行波束形成。

公开(公告)号：US08798120B2

公开(公告)日：2014-08-05

申请号：US12727049

申请日：2010-03-18

申请人： Gustavo de Veciana ,  Hongseok Kim ,  Chan-Byoung Chae ,  Robert W. Heath, Jr.

发明人： Gustavo de Veciana ,  Hongseok Kim ,  Chan-Byoung Chae ,  Robert W. Heath, Jr.

IPC分类号： H04B1/38

CPC分类号： H04B7/0877 ,  H04B7/0417 ,  H04B7/063 ,  H04B7/0689 ,  H04W52/0261 ,  Y02D70/1262 ,  Y02D70/1264 ,  Y02D70/146 ,  Y02D70/444

摘要： Examples are generally described that include methods for selecting a transmit mode in a communications system. An example method may include calculating a first transmission rate for data in a multiple-input multiple-output mode of the communications system and calculating a second transmission rate for the data in a single-input multiple-output mode of the communications system. A mode may be selected from the group consisting of the multiple-input multiple-output mode and the single-input multiple-output mode based, at least in part, on an energy consumption of the first and second transmission rates. Data may be transmitted from a transceiver in the communications system using the selected mode.

摘要翻译： 通常描述包括在通信系统中选择发送模式的方法的示例。 示例性方法可以包括为通信系统的多输入多输出模式中的数据计算第一传输速率，并计算通信系统的单输入多输出模式中的数据的第二传输速率。 至少部分地基于第一和第二传输速率的能量消耗，从多输入多输出模式和单输入多输出模式中选择模式。 可以使用所选择的模式从通信系统中的收发器发送数据。

公开(公告)号：US08217835B2

公开(公告)日：2012-07-10

申请号：US12660644

申请日：2010-03-02

申请人： Eun Seok Ko ,  Jong-Hyung Kwun ,  Sang-hyun Kim ,  Robert Heath, Jr. ,  Chan-Byoung Chae

发明人： Eun Seok Ko ,  Jong-Hyung Kwun ,  Sang-hyun Kim ,  Robert Heath, Jr. ,  Chan-Byoung Chae

IPC分类号： H01Q3/00

CPC分类号： H04B7/043 ,  H04B7/0452

摘要： A base station is capable of transmitting a signal in a wireless communication network. The base station decides channel state information matrices of respective channels by determining a state of the channels corresponding to respective transmission antennas. The base station calculates transmission beam forming vectors for the respective transmission antennas by a combination of a dot product and a cross product of the channel state information matrices. Thereafter, the base station beam-forms signals for the respective transmission antennas by using the respective transmission beam forming vectors, and transmitting the beam-formed signals.

摘要翻译： 基站能够在无线通信网络中发送信号。 基站通过确定与各个发送天线相对应的信道的状态来确定各信道的信道状态信息矩阵。 基站通过信道状态信息矩阵的点积和交叉乘积的组合来计算各个发送天线的发送波束形成向量。 此后，基站通过使用各个发送波束形成向量波束形成各个发送天线的信号，并发送波束形成的信号。

公开(公告)号：US07764744B2

公开(公告)日：2010-07-27

申请号：US11523278

申请日：2006-09-18

申请人： Soong-Yoon Choi ,  Gun-Chul Hwang ,  Chan-Byoung Chae ,  Seung-Hoon Nam

发明人： Soong-Yoon Choi ,  Gun-Chul Hwang ,  Chan-Byoung Chae ,  Seung-Hoon Nam

IPC分类号： H04B7/02 ,  H04L27/28 ,  H04J7/02 ,  H04J11/00 ,  H04W4/00

CPC分类号： H04L1/0656 ,  H04B7/063 ,  H04B7/0634 ,  H04B7/0689 ,  H04L25/0206 ,  H04L25/0224 ,  H04L27/2608

摘要： An apparatus and method for simultaneously providing service to users each having a different number of antennas in a multiple-antenna wireless communication system are provided. The communication method discloses a BS in a wireless communication system that services a first multiple antenna mode using X transmit antennas and a second multiple antenna mode using Y transmit antennas such that (Y>X), the BS determines an MS to be serviced in the second multiple antenna mode and receives a sounding signal from the MS. The BS estimates an uplink channel using the received sounding signal and acquires downlink channel values using estimated uplink channel values. Then the BS services the MS in the second multiple antenna mode using the downlink channel values.

摘要翻译： 提供了一种用于在多天线无线通信系统中同时向具有不同天数的用户提供服务的装置和方法。 该通信方法公开了使用X个发射天线来服务第一多天线模式的无线通信系统中的BS，以及使用Y个发射天线的第二多天线模式，使得（Y> X），BS确定要在 第二多天线模式并从MS接收探测信号。 BS使用接收到的探测信号估计上行链路信道，并且使用估计的上行链路信道值来获取下行链路信道值。 然后BS使用下行链路信道值在第二多天线模式中服务于MS。

公开(公告)号：US20090252250A1

公开(公告)日：2009-10-08

申请号：US12417426

申请日：2009-04-02

申请人： Robert Wendell Heath, JR. ,  Chan-Byoung Chae

发明人： Robert Wendell Heath, JR. ,  Chan-Byoung Chae

IPC分类号： H04B7/02 ,  H04M1/00

CPC分类号： H04B7/0617 ,  H04B7/0417

摘要： An apparatus and method for beamforming in a Multiple Input Multiple Output (MIMO) wireless communication system are provided. A Base Station (BS) includes a calculator for generating relational expressions between beamforming vectors of Mobile Stations (MSs) using channel information of each MS, for determining beamforming vector candidates of each MS from the relational expressions using generalized Eigen-analysis, and for selecting beamforming vectors for each MS from the beamforming vector candidates, and a plurality of Transmit (Tx) beamformers for performing Tx beamforming on dedicated pilot symbols to be transmitted to each MS using the beamforming vectors for each MS.

摘要翻译： 提供了一种用于多输入多输出（MIMO）无线通信系统中的波束成形的装置和方法。 基站（BS）包括使用每个MS的信道信息来生成移动站（MS）的波束成形向量之间的关系表达式的计算器，用于使用广义特征分析从关系表达式确定每个MS的波束形成向量候选，并且用于选择 波束形成向量候选的每个MS的波束成形向量，以及多个发射（Tx）波束形成器，用于在专用导频符号上执行Tx波束形成，以使用每个MS的波束成形向量发射到每个MS。

公开(公告)号：US07483502B2

公开(公告)日：2009-01-27

申请号：US10922467

申请日：2004-08-20

申请人： Chan-Byoung Chae ,  Katz-Marcos Daniel ,  Jung-Min Ro ,  Chang-Ho Suh

发明人： Chan-Byoung Chae ,  Katz-Marcos Daniel ,  Jung-Min Ro ,  Chang-Ho Suh

IPC分类号： H04L25/08

CPC分类号： H04B7/086

摘要： A method for receiving a signal from a radio unit in a base station having at least one reception antenna is disclosed. The method includes receiving a reception signal via the reception antenna, and generating an output signal using the reception signal and a reception beam weight for a previous time; calculating a cost function using a desired reception signal transmitted from the radio unit among the reception signal and the generated output signal; calculating a trace vector using the calculated cost function and the reception signal; updating the reception beam weight using the trace vector for a next time; and generating a reception beam by applying the updated reception beam weight.

摘要翻译： 公开了一种用于从具有至少一个接收天线的基站中的无线电单元接收信号的方法。 该方法包括经由接收天线接收接收信号，并使用接收信号和前一时刻的接收波束权重产生输出信号; 使用从所述无线单元在所述接收信号和所生成的输出信号中发送的期望接收信号来计算成本函数; 使用计算的成本函数和接收信号计算跟踪向量; 使用跟踪向量更新下一次的接收波束权重; 以及通过应用更新的接收波束权重来产生接收波束。