公开(公告)号：US20110167321A1

公开(公告)日：2011-07-07

申请号：US12809392

申请日：2008-02-29

申请人： Sung-Hyun Hwang ,  Jung Sun Um ,  Myung Sun Song ,  Chang-Joo Kim ,  Se-Bin Im ,  Tae-Woong Yoon ,  Hyung-Jin Choi

发明人： Sung-Hyun Hwang ,  Jung Sun Um ,  Myung Sun Song ,  Chang-Joo Kim ,  Se-Bin Im ,  Tae-Woong Yoon ,  Hyung-Jin Choi

IPC分类号： H04L27/28 ,  H04B17/00 ,  H03M13/23 ,  G06F11/10

CPC分类号： H04L5/0051 ,  H04L25/0224 ,  H04L25/03292 ,  H04L27/2613 ,  H04L27/2647

摘要： A data transmitter and receiver for improving a data rate, and more particularly, to an apparatus and method of transmitting and receiving an orthogonal frequency division multiplexing (OFDM) symbol in which a pilot signal is added to a data signal is provided. The apparatus includes a transmitter including: a pilot adder to add a pilot signal to a data signal; and a guard interval inserting unit to insert a guard interval to the data signal with the added pilot signal, and a receiver including: a guard interval removal unit to remove a guard interval in a received time domain signal; a fast Fourier transform (FFT) unit to transform the time domain signal in which the guard interval is removed to a frequency domain signal; a channel estimator to estimate a channel value from the time domain signal in which the guard interval is removed; an equalizer to equalize the frequency domain signal based on the estimated channel value; and a pilot signal removal unit to remove the pilot signal in the equalized frequency domain signal.

摘要翻译： 提供了一种用于提高数据速率的数据发送器和接收器，更具体地，涉及一种发送和接收其中向数据信号添加导频信号的正交频分复用（OFDM）符号的装置和方法。 该装置包括：发射机，包括：导频加法器，用于将导频信号加到数据信号上; 以及保护间隔插入单元，用于利用所附加的导频信号向所述数据信号插入保护间隔;以及接收机，包括：保护间隔去除单元，用于去除所接收的时域信号中的保护间隔; 快速傅立叶变换（FFT）单元，用于将保护间隔被去除的时域信号变换为频域信号; 信道估计器，用于从保护间隔被去除的时域信号中估计信道值; 均衡器，用于基于估计的信道值来均衡频域信号; 以及导频信号去除单元，用于去除均衡的频域信号中的导频信号。

公开(公告)号：US20090274174A1

公开(公告)日：2009-11-05

申请号：US12298225

申请日：2007-04-24

申请人： Sung-Hyun Hwang ,  Chang-Joo Kim ,  Myung-Sun Song ,  Jung-Sun Um

发明人： Sung-Hyun Hwang ,  Chang-Joo Kim ,  Myung-Sun Song ,  Jung-Sun Um

IPC分类号： H04J1/00 ,  H04L27/28

CPC分类号： H04W72/0406 ,  H04L5/0007 ,  H04L5/0048

摘要： Provided is a method of generating a pilot pattern capable of perform adaptive channel estimation, and a method and apparatus of a base station and a method and apparatus of a terminal using the pilot pattern. The pilot pattern selects pilot symbol positions based on distances from pilots of previous orthogonal frequency division multiple access (OFDMA) symbols to a subcarrier position of a current OFDMA symbol in the frequency domain and the time domain, so that a low pilot density is maintained so as to effectively transmit data, and stable channel estimation performance can be obtained even in a bad channel environment. In addition, the minimum burst allocation size is determined according to the channel environment between the base station and the terminal, guaranteeing channel estimation performance suitable for the channel environment, and improving granularity, channel estimation latency, and channel estimation memory size.

摘要翻译： 提供了一种生成能够执行自适应信道估计的导频模式的方法，以及基站的方法和装置以及使用导频模式的终端的方法和装置。 导频模式基于从先前的正交频分多址（OFDMA）符号的导频到频域和时域中的当前OFDMA符号的子载波位置的距离来选择导频符号位置，从而维持低导频密度 为了有效地发送数据，即使在恶劣的信道环境中也可以获得稳定的信道估计性能。 另外，根据基站和终端之间的信道环境确定最小突发分配大小，保证适合信道环境的信道估计性能，提高粒度，信道估计延迟和信道估计存储器大小。

公开(公告)号：US20110149889A1

公开(公告)日：2011-06-23

申请号：US12942491

申请日：2010-11-09

申请人： Jung Sun UM ,  Gwangzeen Ko ,  Sung-Hyun Hwang ,  Myung Sun Song ,  Chang-Joo Kim

发明人： Jung Sun UM ,  Gwangzeen Ko ,  Sung-Hyun Hwang ,  Myung Sun Song ,  Chang-Joo Kim

IPC分类号： H04W72/04

CPC分类号： H04W72/1205 ,  H04W84/045 ,  H04W84/047

摘要： Provided is a large range management device (LRMD) of managing a communication between a plurality of small range devices (SRDs) and a plurality of large range devices (LRDs), the SRDs and the LRDs being located in a single cell and having different transmission coverage, the LRMD including an access slot allocation unit to allocate an SRD access slot to a radio resource for a downlink, to enable a first SRD to request an association from a network, a selection unit to select a communication relay device for relaying relay data of the first SRD, a relay slot allocation unit to allocate at least one SRD relay slot to a radio resource for an uplink, to enable the communication relay device to relay the relay data to a second SRD or another LRD, and a receiving unit to receive the relay data based on the at least one SRD relay slot

摘要翻译： 提供了一种管理多个小范围设备（SRD）和多个大范围设备（LRD）之间的通信的大范围管理设备（LRMD），SRD和LRD位于单个小区中并具有不同的传输 覆盖，所述LRMD包括接入时隙分配单元，用于向下行链路的无线电资源分配SRD接入时隙，以使得第一SRD能够从网络请求关联，所述选择单元选择用于中继中继数据的通信中继设备 的第一SRD的中继时隙分配单元，用于向上行链路的无线资源分配至少一个SRD中继时隙，以使得所述通信中继设备能够将所述中继数据中继到第二SRD或另一个LRD;以及接收单元， 基于所述至少一个SRD中继槽接收所述中继数据

公开(公告)号：US20100040080A1

公开(公告)日：2010-02-18

申请号：US12527569

申请日：2008-03-06

申请人： Jung-Sun Um ,  Sung-Hyun Hwang ,  Chang-Joo Kim ,  Myung-Sun Song

发明人： Jung-Sun Um ,  Sung-Hyun Hwang ,  Chang-Joo Kim ,  Myung-Sun Song

IPC分类号： H04J3/16

CPC分类号： H04L5/023 ,  H04L5/0039 ,  H04L5/0041 ,  H04L5/006

摘要： A method and apparatus for allocating subchannels in an orthogonal frequency division multiple access (OFDMA) system is provided. In the method and apparatus, mixed bands in each of which adjacent subcarriers and distributed subcarriers are mixed are used to form a band of a basic physical resource. Accordingly, diversity subchannels each comprised of distributed subcarriers distributed over the whole band and band subchannels each comprised of adjacent subcarriers adjacent to parts of the band are formed in a single OFDMA symbol, thereby simultaneously and flexibly allocating subchannels to users.

摘要翻译： 提供了一种用于在正交频分多址（OFDMA）系统中分配子信道的方法和装置。 在该方法和装置中，使用相邻副载波和分布式副载波混合的混合频带，形成基本物理资源的频带。 因此，在单个OFDMA符号中形成各自包含分布在整个频带上的分布式子载波的分集子信道和每个包括与频带部分相邻的相邻子载波的频带子信道，从而同时且灵活地向用户分配子信道。

公开(公告)号：US08787271B2

公开(公告)日：2014-07-22

申请号：US12942491

申请日：2010-11-09

申请人： Jung Sun Um ,  Gwangzeen Ko ,  Sung-Hyun Hwang ,  Myung Sun Song ,  Chang-Joo Kim

发明人： Jung Sun Um ,  Gwangzeen Ko ,  Sung-Hyun Hwang ,  Myung Sun Song ,  Chang-Joo Kim

IPC分类号： H04W4/00 ,  H04W72/12 ,  H04W84/04

CPC分类号： H04W72/1205 ,  H04W84/045 ,  H04W84/047

摘要： Provided is a large range management device (LRMD) of managing a communication between a plurality of small range devices (SRDs) and a plurality of large range devices (LRDs), the SRDs and the LRDs being located in a single cell and having different transmission coverage, the LRMD including an access slot allocation unit to allocate an SRD access slot to a radio resource for a downlink, to enable a first SRD to request an association from a network, a selection unit to select a communication relay device for relaying relay data of the first SRD, a relay slot allocation unit to allocate at least one SRD relay slot to a radio resource for an uplink, to enable the communication relay device to relay the relay data to a second SRD or another LRD, and a receiving unit to receive the relay data based on the at least one SRD relay slot.

摘要翻译： 提供了一种管理多个小范围设备（SRD）和多个大范围设备（LRD）之间的通信的大范围管理设备（LRMD），SRD和LRD位于单个小区中并具有不同的传输 覆盖，所述LRMD包括接入时隙分配单元，用于向下行链路的无线电资源分配SRD接入时隙，以使得第一SRD能够从网络请求关联，所述选择单元选择用于中继中继数据的通信中继设备 的第一SRD的中继时隙分配单元，用于向上行链路的无线资源分配至少一个SRD中继时隙，以使得所述通信中继设备能够将所述中继数据中继到第二SRD或另一个LRD;以及接收单元， 基于所述至少一个SRD中继槽接收所述中继数据。

公开(公告)号：US08488526B2

公开(公告)日：2013-07-16

申请号：US12747299

申请日：2008-12-10

申请人： Sung-Hyun Hwang ,  Jung-Sun Um ,  Gwangzeen Ko ,  Myung-Sun Song ,  Chang-Joo Kim

发明人： Sung-Hyun Hwang ,  Jung-Sun Um ,  Gwangzeen Ko ,  Myung-Sun Song ,  Chang-Joo Kim

IPC分类号： H04J11/00 ,  H04J3/24 ,  H04W4/00

CPC分类号： H04W52/283 ,  H04L7/041 ,  H04W16/14 ,  H04W48/16 ,  H04W72/082

摘要： Provided are a network communication method and a network device using a preamble. According to the network communication method and the network device, network coexistence is easily achieved by using network identification transmitted in the preamble, and an unknown terminal, which has a low reception signal to noise ratio (SNR) and has not yet been connected to an existing network, is easily connected to the existing network.

摘要翻译： 提供了一种网络通信方法和使用前置码的网络设备。 根据网络通信方式和网络设备，通过使用在前导码中发送的网络识别和具有低接收信噪比（SNR）并且尚未连接到前导码的未知终端容易地实现网络共存 现有网络，轻松连接到现有网络。

公开(公告)号：US08326336B2

公开(公告)日：2012-12-04

申请号：US12858841

申请日：2010-08-18

申请人： Jung-Sun Um ,  Myung-Sun Song ,  Chang-Joo Kim ,  Gwangzeen Ko ,  Sung-Hyun Hwang ,  Sang-Won Kim ,  Changhyun Park

发明人： Jung-Sun Um ,  Myung-Sun Song ,  Chang-Joo Kim ,  Gwangzeen Ko ,  Sung-Hyun Hwang ,  Sang-Won Kim ,  Changhyun Park

IPC分类号： H04B17/00 ,  H04B7/00 ,  H04B5/00

CPC分类号： H04W72/085 ,  H04W16/14 ,  H04W72/042

摘要： A CR apparatus for performing communication in a CR network includes: a communication unit configured to measure a channel estimation signal, transmit measured channel state information to a master device, and, when a QP of a reference channel arrives, make a communication channel transition to a candidate channel and perform communication; and a channel information management unit configured to receive and manage the channel state information measured by the communication unit and channel information comprising a candidate channel, into which a channel transition is to be made during a QP of the reference channel, received from the master device and control channel transition of the communication unit based on the channel information.

摘要翻译： 用于在CR网络中执行通信的CR装置包括：通信单元，被配置为测量信道估计信号，将测量的信道状态信息发送到主设备，并且当参考信道的QP到达时，使通信信道转换到 候选频道并进行通信; 以及信道信息管理单元，被配置为接收和管理由所述通信单元测量的信道状态信息，以及信道信息，所述信道信息包括在从所述主设备接收的参考信道的QP期间将要进行信道转换的候选信道 以及基于信道信息的通信单元的控制信道转换。

公开(公告)号：US20110243089A1

公开(公告)日：2011-10-06

申请号：US13139620

申请日：2009-12-15

申请人： Gwangzeen Ko ,  Moon-Won Lee ,  Sung-Jin You ,  Sung-Hyun Hwang ,  Jung-Sun Um ,  Myung-sun Song ,  Chang-Joo Kim

发明人： Gwangzeen Ko ,  Moon-Won Lee ,  Sung-Jin You ,  Sung-Hyun Hwang ,  Jung-Sun Um ,  Myung-sun Song ,  Chang-Joo Kim

IPC分类号： H04W72/04 ,  H04W4/00

CPC分类号： H04W48/08 ,  H04W88/06

摘要： Provided is a hybrid beaconing method in which a centralized beaconing scheme and a distributed beaconing scheme are combined. In the hybrid beaconing method, a beaconing scheme is converted according to a network condition, and a centralized beaconing scheme or a distributed beaconing scheme is used to maintain an optimum network status

摘要翻译： 提供了组合中央信标方案和分布式信标方案的混合信标方法。 在混合信标方法中，根据网络条件转换信标方案，并使用集中式信标方案或分布式信标方案来维持最佳网络状态

公开(公告)号：US20100111017A1

公开(公告)日：2010-05-06

申请号：US12596181

申请日：2008-04-21

申请人： Jung-Sun Um ,  Sung-Hyun Hwang ,  Chang-Joo Kim ,  Myung-Sun Song

发明人： Jung-Sun Um ,  Sung-Hyun Hwang ,  Chang-Joo Kim ,  Myung-Sun Song

IPC分类号： H04W72/04

CPC分类号： H04L27/2601 ,  H04L5/0048 ,  H04L27/2613 ,  H04L27/2656

摘要： Provided is a method and apparatus of generating signals for initial ranging in an Orthogonal Frequency Division Multiple Access (OFDMA) system. The method, includes: generating a plurality of ranging symbols by cyclic-shifting sample data of a ranging symbol in one OFDMA symbol period as much as a value obtained by multiplying a cyclic prefix size by a symbol index; generating a ranging signal by copying a rear part corresponding to the cyclic prefix size in the sample data with respect to each of the ranging symbols and inserting the copied rear part in front of the sample data as a cyclic prefix.

摘要翻译： 提供了一种在正交频分多址（OFDMA）系统中生成用于初始测距的信号的方法和装置。 该方法包括：通过循环移位一个OFDMA符号周期中的测距符号的采样数据，生成多个测距符号，其数量与通过将循环前缀大小乘以符号索引而获得的值一样多; 通过将相对于每个测距符号的采样数据中的循环前缀大小相对应的后部复制并作为循环前缀插入到采样数据的前面，生成测距信号。

公开(公告)号：US08964640B2

公开(公告)日：2015-02-24

申请号：US13139620

申请日：2009-12-15

申请人： Gwangzeen Ko ,  Moon-Won Lee ,  Sung-Jin You ,  Sung-Hyun Hwang ,  Jung-Sun Um ,  Myung-Sun Song ,  Chang-Joo Kim

发明人： Gwangzeen Ko ,  Moon-Won Lee ,  Sung-Jin You ,  Sung-Hyun Hwang ,  Jung-Sun Um ,  Myung-Sun Song ,  Chang-Joo Kim

IPC分类号： H04Q7/00 ,  H04W48/08 ,  H04W88/06

CPC分类号： H04W48/08 ,  H04W88/06

摘要： Provided is a hybrid beaconing method in which a centralized beaconing scheme and a distributed beaconing scheme are combined. In the hybrid beaconing method, a beaconing scheme is converted according to a network condition, and a centralized beaconing scheme or a distributed beaconing scheme is used to maintain an optimum network status.

摘要翻译： 提供了组合中央信标方案和分布式信标方案的混合信标方法。 在混合信标分析方法中，根据网络条件转换信标方案，并且使用集中式信标方案或分布式信标方案来维持最佳网络状态。