公开(公告)号：US20050253652A1

公开(公告)日：2005-11-17

申请号：US11126322

申请日：2005-05-11

申请人： Yoo-Seung Song ,  Jae-Hyok Lee ,  Seung-Hwan Lee ,  Ki-Hwan Hwang ,  Jae-Ho Jeon ,  Seung-Joo Maeng

发明人： Yoo-Seung Song ,  Jae-Hyok Lee ,  Seung-Hwan Lee ,  Ki-Hwan Hwang ,  Jae-Ho Jeon ,  Seung-Joo Maeng

IPC分类号： H04B7/26 ,  H03F1/26 ,  H03F1/32

CPC分类号： H03F1/3247

摘要： A digital predistortion apparatus is provided for predistorting a nonlinear characteristic caused by a wideband power amplifier that amplifies a input signal. The digital predistortion apparatus includes a predistorter, connected to the power amplifier via a digital-to-analog converter (DAC) and a frequency up-converter, for receiving the input signal and compensating for the nonlinear characteristic using a look-up table that depends upon a change in output power of the power amplifier. The digital predistortion apparatus further includes look-up table (LUT) updating block for adaptively updating the look-up table by comparing a feedback signal output from the power amplifier, connected thereto via an analog-to-digital converter (ADC), with the input signal output from the predistorter.

摘要翻译： 提供一种用于预失真由放大输入信号的宽带功率放大器引起的非线性特性的数字预失真装置。 数字预失真装置包括一个预失真器，它通过一个数/模转换器（DAC）和一个上变频器连接到功率放大器，用于接收输入信号，并使用一个查找表来补偿非线性特性 在功率放大器的输出功率变化时。 数字预失真装置还包括查找表（LUT）更新块，用于通过将经由模数转换器（ADC）连接到其的功率放大器输出的反馈信号与自动更新查找表与 来自预失真器的输入信号输出。

公开(公告)号：US06512753B1

公开(公告)日：2003-01-28

申请号：US09473766

申请日：1999-12-29

申请人： Jae-Yoel Kim ,  Jae-Min Ahn ,  Hoe-Won Kang ,  Seung-Joo Maeng

发明人： Jae-Yoel Kim ,  Jae-Min Ahn ,  Hoe-Won Kang ,  Seung-Joo Maeng

IPC分类号： H04B7216

CPC分类号： H04J13/102 ,  H04B7/264 ,  H04B2201/70703

摘要： Disclosed is a channel spreading device for a base station device in a CMDA communication system for spreading input symbols using a first quasi-orthogonal code having a first length or channel spreading the input symbols using a second quasi-orthogonal code having a second length which is a multiple of the first length. The device comprises a spreading code generator for generating the second quasi-orthogonal code; a channel spreader for providing a plurality of durations by dividing a duration of the second quasi-orthogonal code by said multiple of the length of the first quasi-orthogonal code, and spreading channel coded symbols with the quasi-orthogonal codes divided to have a length corresponding to the divided durations so as to spread the symbols identical in number to said multiple of the first quasi-orthogonal code duration at the duration of the second quasi-orthogonal; and a PN spreader for spreading the channel spread signal with a PN code.

摘要翻译： 公开了一种用于CMDA通信系统中的基站装置的信道扩展装置，用于使用具有第一长度或信道的第一准正交码扩展输入符号，该第一准正交码具有使用第二长度的第二准正交码扩展输入符号，第二准正交码是第二长度， 第一个长度的倍数。 该装置包括用于产生第二准正交码的扩展码发生器; 通道扩展器，用于通过将所述第二准正交码的持续时间除以所述第一准正交码的长度的所述倍数来提供多个持续时间，以及扩展信道编码符号与准正交码被划分为具有长度 对应于划分的持续时间，以便在第二准正交的持续时间内将与数字相同的符号扩展到第一准正交码持续时间的所述倍数; 以及用于使用PN码扩展信道扩展信号的PN扩展器。

公开(公告)号：US09191860B2

公开(公告)日：2015-11-17

申请号：US12378868

申请日：2009-02-20

申请人： Hee-Kwang Lee ,  Seung-Joo Maeng ,  Jae-Ho Jeon

发明人： Hee-Kwang Lee ,  Seung-Joo Maeng ,  Jae-Ho Jeon

IPC分类号： H04W4/00 ,  H04W28/16 ,  H04W4/12 ,  H04W24/00 ,  H04W28/06

CPC分类号： H04W28/16 ,  H04W4/12 ,  H04W24/00 ,  H04W28/06

摘要： A resource allocation method of a Base Station (BS) in a wireless communication system is provided. The method includes estimating a size of a MAP message, and evaluating a size of an available burst allocation region according to the estimated size of the MAP message and allocating bursts in the evaluated-sized burst allocation region. Accordingly, when a DownLink (DL) subframe is used by being divining into a plurality of regions according to a burst characteristic, a throughput can be improved without waste of resources by estimating a resource amount occupied by a MAP message in the DL subframe.

公开(公告)号：US08254945B2

公开(公告)日：2012-08-28

申请号：US12380230

申请日：2009-02-25

申请人： Hee-Kwang Lee ,  Seung-Joo Maeng ,  Jae-Ho Jeon

发明人： Hee-Kwang Lee ,  Seung-Joo Maeng ,  Jae-Ho Jeon

IPC分类号： H04W72/00 ,  H04J11/00

CPC分类号： H04L5/0037 ,  H04L5/0023 ,  H04L5/0048 ,  H04L5/0058 ,  H04W52/38 ,  H04W72/04 ,  H04W72/10

摘要： A method of allocating bursts in a broadband wireless communication system is provided. The method includes dividing a downlink period into a plurality of regions according to a burst property, calculating a residual symbol axis size and a residual subchannel axis size of a first region conforming to two-dimensional allocation among the plurality of regions, allocating bursts to be allocated to the first region in a descending order, wherein the bursts are respectively allocated in a rectangular shape having a length corresponding to the number of residual symbols along a time axis or in a rectangular shape having a length corresponding to the number of residual subchannels along a frequency axis, and allocating bursts to be allocated to at least one region conforming to one-dimensional allocation among the plurality of regions to the at least one region conforming to one-dimensional allocation according to a scheduling priority.

摘要翻译： 提供了一种在宽带无线通信系统中分配突发的方法。 该方法包括根据突发特性将下行链路周期划分为多个区域，计算在多个区域之间符合二维分配的第一区域的残余符号轴大小和剩余子信道轴尺寸，将突发分配为 分配给第一区域，其中突发分别被分配成具有与沿着时间轴的残余符号的数量相对应的长度的矩形形状或者具有对应于沿着剩余子信道数量的长度的矩形形状 频率轴，并且根据调度优先级，将符合一维分配的至少一个区域的突发分配给符合一维分配的至少一个区域。

公开(公告)号：US08195178B2

公开(公告)日：2012-06-05

申请号：US12657327

申请日：2010-01-19

申请人： Pil-Jae Moon ,  Jeong-Heon Kim ,  Seung-Joo Maeng

发明人： Pil-Jae Moon ,  Jeong-Heon Kim ,  Seung-Joo Maeng

IPC分类号： H04W72/00 ,  H04W24/00 ,  H04W4/00

CPC分类号： H04W56/0075

摘要： A Base Station (BS) includes an apparatus capable of performing an offset adjustment for a Mobile Station (MS). The BS can determine an offset mean value of the MS using a previously estimated offset of the MS if UpLink (UL) data received from the MS does not exist. The BS determines whether to transmit an unsolicited ranging response message (Unsolicited RNG-RSP) using the offset mean value of the MS. If transmitting the Unsolicited RNG-RSP, the BS transmits the MS the Unsolicited RNG-RSP including an offset adjustment value for the MS.

摘要翻译： 基站（BS）包括能够对移动台（MS）执行偏移调整的装置。 如果从MS接收到的UpLink（UL）数据不存在，则BS可以使用先前估计的MS的偏移来确定MS的偏移平均值。 BS使用MS的偏移平均值来确定是否发送未经请求的测距响应消息（Unsolicited RNG-RSP）。 如果发送未经请求的RNG-RSP，则BS向MS发送包括MS的偏移调整值的未经请求的RNG-RSP。

公开(公告)号：US20110249715A1

公开(公告)日：2011-10-13

申请号：US13085993

申请日：2011-04-13

申请人： Yun-Seok Choi ,  Seung-Joo Maeng ,  Byung Chan Ahn

发明人： Yun-Seok Choi ,  Seung-Joo Maeng ,  Byung Chan Ahn

IPC分类号： H04B1/38 ,  H04B17/00

CPC分类号： H04W28/0221 ,  H04B7/0413 ,  H04B7/0615 ,  H04W52/0274 ,  H04W52/42 ,  H04W52/52 ,  H04W72/0446 ,  H04W72/1252 ,  Y02D70/126 ,  Y02D70/146

摘要： An apparatus and method reduce power consumption in a broadband wireless communication system. A transmitting end apparatus that includes a plurality of transmit (Tx) antennas includes a control block, a Processor (DSP) block, a modem block, and at least one power controller. The control block determines a traffic amount based on an amount of used resources. The Digital Signal Processor (DSP) block performs scheduling by using a subset of Tx antennas and a subset of resources on a frequency axis if the traffic amount is less than a threshold. The modem block applies boosting to a signal transmitted using the subset of resources. And at least one controller turns off an operation of at least one power amplifier that corresponds to at least one Tx antenna that is not included in the subset of Tx antennas.

摘要翻译： 一种降低宽带无线通信系统功耗的装置和方法。 包括多个发送（Tx）天线的发送端设备包括控制块，处理器（DSP）块，调制解调器块和至少一个功率控制器。 控制块基于所使用资源的数量来确定流量。 如果业务量小于阈值，则数字信号处理器（DSP）块通过使用Tx天线的子集和频率轴上的资源子集来执行调度。 调制解调器模块使用资源子集传输的信号进行升压。 并且至少一个控制器关闭对应于不包括在Tx天线的子集中的至少一个Tx天线的至少一个功率放大器的操作。

公开(公告)号：US20100331036A1

公开(公告)日：2010-12-30

申请号：US12816937

申请日：2010-06-16

申请人： Hwa-Sun YOU ,  Ji-Ho Jang ,  Jae-Ho Jeon ,  Seung-Joo Maeng

发明人： Hwa-Sun YOU ,  Ji-Ho Jang ,  Jae-Ho Jeon ,  Seung-Joo Maeng

IPC分类号： H04B7/005

CPC分类号： H04W52/10 ,  H04W52/08 ,  H04W52/146 ,  H04W52/228

摘要： An uplink (UL) power control apparatus and method in a broadband wireless communication system are provided. The Mobile Station (MS) includes a power controller for calculating a power compensation value using a last transmit power in a previous closed loop power control when a power control mode is changed to an open loop power control, and determining a transmit power according to the open loop power control using the power compensation value; and a transmitter for adjusting and transmitting the transmit power of a UL signal under control of the power controller.

摘要翻译： 提供了宽带无线通信系统中的上行（UL）功率控制装置和方法。 移动站（MS）包括功率控制器，用于当功率控制模式改变为开环功率控制时，使用先前闭环功率控制中的最后发射功率来计算功率补偿值，并且根据 开环功率控制采用功率补偿值; 以及发射机，用于在功率控制器的控制下调整和发送UL信号的发射功率。

公开(公告)号：US07826344B2

公开(公告)日：2010-11-02

申请号：US11176930

申请日：2005-07-07

申请人： Jeong-Tae Oh ,  Won-Il Roh ,  Kyun-Byoung Ko ,  Seung-Joo Maeng ,  Jae-Ho Jeon ,  Pan-Yuh Joo ,  Chan-Byoung Chae ,  Hong-Sil Jeong ,  Sung-Ryul Yun

发明人： Jeong-Tae Oh ,  Won-Il Roh ,  Kyun-Byoung Ko ,  Seung-Joo Maeng ,  Jae-Ho Jeon ,  Pan-Yuh Joo ,  Chan-Byoung Chae ,  Hong-Sil Jeong ,  Sung-Ryul Yun

IPC分类号： H04J11/00 ,  H04K1/10

CPC分类号： H04B7/0613 ,  H04L1/0066 ,  H04L1/007 ,  H04L1/0071 ,  H04L1/0668 ,  H04L5/0023 ,  H04L5/0048 ,  H04L25/0226

摘要： A method and system for transmitting reference signals in a BWA communication system using a first transmit antenna, a second transmit antenna, and a plurality of sub-carriers. Each of the sub-carriers occupies a sub-frequency domain. In the method, reference signals for identifying a first transmit antenna are transmitted through a second predetermined number of sub-carriers in a first mini sub-channel transmitted through the first transmit antenna and occupied by a predetermined time domain and sub-frequency domains of a first predetermined number of sub-carriers, and reference signals for identifying a second transmit antenna are transmitted through the second predetermined number of the sub-carriers in a second mini sub-channel transmitted through the second transmit antenna and occupied by the time domain and the sub-frequency domains of the first predetermined number of sub-carriers.

摘要翻译： 一种使用第一发射天线，第二发射天线和多个子载波在BWA通信系统中发送参考信号的方法和系统。 每个子载波占用一个子频域。 在该方法中，用于识别第一发射天线的参考信号通过第一预定数量的子载波在通过第一发射天线发送并由预定时域占据的第一小型子信道中传输， 第一预定数量的子载波和用于识别第二发射天线的参考信号通过第二预定数量的子载波在通过第二发射天线发射并被时域占用的第二小型子信道中发送，并且 第一预定数量的副载波的子频域。

公开(公告)号：US20100216472A1

公开(公告)日：2010-08-26

申请号：US12660364

申请日：2010-02-25

申请人： Il-Jin Youn ,  Byung-Chan An ,  Seung-Joo Maeng

发明人： Il-Jin Youn ,  Byung-Chan An ,  Seung-Joo Maeng

IPC分类号： H04W36/34 ,  H04B7/005

CPC分类号： H04L1/0003 ,  H04L1/0009 ,  H04L1/0026 ,  H04W36/30 ,  H04W52/146 ,  H04W52/243 ,  H04W52/367 ,  H04W72/085

摘要： A base station is capable of performing a method for scheduling in a wireless communication system. In the method, a downlink channel measurement value received from a terminal is compared with a threshold. When the downlink channel measurement value is smaller than the threshold, an activation set for a handover of the terminal is determined. When the number of base stations inside the activation set is two or more, a Modulation and Coding Scheme (MCS) level is allocated to the terminal with consideration of the downlink channel measurement value. A wireless resource is allocated to the terminal with consideration of the allocated MCS level and a headroom of the terminal.

摘要翻译： 基站能够执行无线通信系统中的调度方法。 在该方法中，将从终端接收的下行链路信道测量值与阈值进行比较。 当下行链路信道测量值小于阈值时，确定终端切换的激活集合。 当激活集合内的基站的数量是两个或更多个时，考虑到下行链路信道测量值，向终端分配调制和编码方案（MCS）级别。 考虑到分配的MCS级别和终端的余量，将无线资源分配给终端。

公开(公告)号：US20100208717A1

公开(公告)日：2010-08-19

申请号：US12658650

申请日：2010-02-12

申请人： Young-Ky Kim ,  Jae-Ho Jeon ,  Il-Whan Kim ,  Seung-Joo Maeng

发明人： Young-Ky Kim ,  Jae-Ho Jeon ,  Il-Whan Kim ,  Seung-Joo Maeng

IPC分类号： H04B7/216 ,  H04B7/00

CPC分类号： H04W16/14 ,  H04W72/0453

摘要： A base station includes a center frequency setting unit, a local oscillator, a baseband processor, and an RF processor. In the event of a frequency band change, the center frequency setting unit sets a center frequency of a use frequency channel to have a predetermined offset value with respect to a center frequency before the frequency band change. The local oscillator generates an LO frequency signal according to the center frequency set by the center frequency setting unit. The baseband processor generates a downlink baseband signal. The RF processor uses the LO frequency signal to convert the downlink baseband signal into an RF signal prior to transmission.

摘要翻译： 基站包括中心频率设置单元，本地振荡器，基带处理器和RF处理器。 在频带变化的情况下，中心频率设定单元将频率信道的中心频率设定为相对于频带变化前的中心频率具有规定的偏移值。 本地振荡器根据由中心频率设定单元设定的中心频率产生LO频率信号。 基带处理器生成下行链路基带信号。 RF处理器使用LO频率信号在传输之前将下行链路基带信号转换成RF信号。