公开(公告)号：US08693563B2

公开(公告)日：2014-04-08

申请号：US12943515

申请日：2010-11-10

申请人： Sung-Hyun Hwang ,  Yun Hee Kim ,  Jin Soo Wang ,  Jae Cheol Park

发明人： Sung-Hyun Hwang ,  Yun Hee Kim ,  Jin Soo Wang ,  Jae Cheol Park

IPC分类号： H04B7/06

CPC分类号： H04L27/2633 ,  H04B7/0602 ,  H04B7/0669 ,  H04L1/0042 ,  H04L1/0625 ,  H04L1/0631 ,  H04L25/0204 ,  H04L25/022 ,  H04L25/0224 ,  H04L27/2621 ,  H04L27/2647

摘要： Provided is a transmitter for transmitting an orthogonal frequency division multiplexing (OFDM) signal using multiple antennas, including: a subgroup generator to divide data symbols of a frequency domain into a plurality of subgroups; an inverse fast Fourier transform (IFFT) unit to perform an IFFT with respect to each of the subgroups so as to generate partial signals of a time domain corresponding to the plurality of subgroups, respectively; a candidate OFDM signal generator to generate at least two candidate OFDM signals using a combination of the partial signals so that each of the partial signals is transmitted to one of transmit antennas; and a selector to select one of the at least two candidate OFDM signals.

摘要翻译： 提供了一种用于使用多个天线发送正交频分复用（OFDM）信号的发射机，包括：子群发生器，用于将频域的数据符号划分为多个子群; 逆快速傅里叶变换（IFFT）单元，用于相对于每个子组执行IFFT，以便分别产生与多个子组相对应的时域的部分信号; 候选OFDM信号发生器，用于使用所述部分信号的组合来产生至少两个候选OFDM信号，使得每个所述部分信号被发送到发射天线之一; 以及选择器，用于选择所述至少两个候选OFDM信号中的一个。

公开(公告)号：US08605610B2

公开(公告)日：2013-12-10

申请号：US12731370

申请日：2010-03-25

申请人： Sung-Hyun Hwang ,  Jin Soo Wang ,  Jae Chul Park ,  Yun Hee Kim

发明人： Sung-Hyun Hwang ,  Jin Soo Wang ,  Jae Chul Park ,  Yun Hee Kim

IPC分类号： H04L12/26 ,  H04H20/71 ,  H04W72/04

CPC分类号： H04L1/0028 ,  H04H20/42 ,  H04H20/71 ,  H04L1/0026 ,  H04L1/1607 ,  H04L25/0224 ,  H04L2001/0093

摘要： A method and apparatus for adaptively transmitting the same data, i.e., multicast/broadcast data, according to channel quality to a receiving group including one or more terminals that request the same service in a wireless network. A base station obtains feedback on channel quality indications (CQIs) from a plurality of terminals, selects a transmission technique that satisfies desired service quality based on the CQIs, and transmits data to the terminals included in a receiving group by using the selected transmission technique. The CQIs to be transmitted from the terminals in the receiving group to the base station are transmitted through a previously allocated common CQI feedback channel. In the present invention, in order to reduce a CQI feedback channel capacity, the base station does not allocate a common CQI feedback channel with respect to each reception terminal and allocates radio resources according to CQI levels. As radio resources are allocated according to CQI levels, a CQI feedback channel capacity may not be increased even when the number of terminals in the receiving group is increased and adaptive transmission may be efficiently performed.

摘要翻译： 一种用于根据信道质量将相同数据即组播/广播数据自适应发送到包括在无线网络中请求相同服务的一个或多个终端的接收组的方法和装置。 基站从多个终端获取对信道质量指示（CQI）的反馈，基于CQI选择满足期望的服务质量的传输技术，并且通过使用所选择的传输技术将数据发送到包括在接收组中的终端。 通过先前分配的公共CQI反馈信道来发送从接收组中的终端发送到基站的CQI。 在本发明中，为了降低CQI反馈信道容量，基站不对每个接收终端分配公共CQI反馈信道，根据CQI等级分配无线资源。 由于根据CQI等级分配无线资源，所以即使接收组中的终端数量增加，也可以有效地进行自适应传输，CQI反馈信道容量也不会增加。

公开(公告)号：US20100172316A1

公开(公告)日：2010-07-08

申请号：US12303577

申请日：2006-10-30

申请人： Sung-Hyun Hwang ,  Myung-Sun Song ,  Chang-Joo Kim ,  Yun-Hee Kim ,  Jae-Yun Won

发明人： Sung-Hyun Hwang ,  Myung-Sun Song ,  Chang-Joo Kim ,  Yun-Hee Kim ,  Jae-Yun Won

IPC分类号： H04W72/04

CPC分类号： H04L27/2608 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0026 ,  H04L1/0027 ,  H04L5/0007 ,  H04L5/0039 ,  H04L5/0044 ,  H04L5/0048 ,  H04L5/006 ,  H04L5/0085 ,  H04L5/023

摘要： A resource allocation method for an orthogonal frequency division multiplexing access (OFDMA) system is provided. The resource allocation method includes dividing a frequency band occupied by a predetermined number of OFDM symbols into a plurality of subbands and determining the number of diversity subchannels, each of which comprises at least two time-frequency resources respectively included in different subbands, and the number of subband selective subchannels, which comprise time-frequency resources that are not included in the diversity subchannels; and generating the diversity subchannels and the subband selective subchannels according to the determined numbers and allocating a physical channel comprised of a generated subchannel to a user in a cell. Accordingly, diversity is enhanced without reducing the freedom of selection of a subband.

摘要翻译： 提供了一种用于正交频分复用接入（OFDMA）系统的资源分配方法。 资源分配方法包括将预定数量的OFDM符号占据的频带划分成多个子带，并确定分集子信道的数量，每个子信道包括分别包括在不同子带中的至少两个时间频率资源，并且数目 子带选择性子信道，其包括不包括在分集子信道中的时间 - 频率资源; 以及根据确定的号码生成分集子信道和子带选择性子信道，并将由生成的子信道组成的物理信道分配给小区中的用户。 因此，在不降低子带选择的自由度的情况下增强分集。

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：US20100177645A1

公开(公告)日：2010-07-15

申请号：US12376657

申请日：2007-08-08

申请人： Bub-Joo Kang ,  Chang-Joo Kim ,  Myung-Sun Song ,  Gwang-Zeen Ko ,  Sung-Hyun Hwang ,  Hyung-Rae Park

发明人： Bub-Joo Kang ,  Chang-Joo Kim ,  Myung-Sun Song ,  Gwang-Zeen Ko ,  Sung-Hyun Hwang ,  Hyung-Rae Park

IPC分类号： H04W72/04 ,  H04L12/26

CPC分类号： H04L27/2614 ,  H04B17/24 ,  H04B17/318 ,  H04B17/364 ,  H04B17/382 ,  H04L1/0003 ,  H04W24/10 ,  H04W72/02 ,  H04W72/0453

摘要： There is a provided a method for managing a multiple frequency assignment using a terminal's RX performance in an orthogonal frequency division multiple access (OFDMA) wireless regional area network (WRAN) system, including: a) measuring a bit energy/noise power spectral density (Eb/No) and a received signal strength indicator (RSSI) which are received in the terminal; b) informing the measured Eb/No and RSSI of a base station; c) calculating a round trip delay (RTD) in the base station; d) determining a terminal performance level based on the measured Eb/No, RSSI and the calculated RTD; and e) determining a frequency channel and modulation scheme based on the determined performance level.

摘要翻译： 提供了一种用于在正交频分多址（OFDMA）无线区域网（WRAN）系统中使用终端的RX性能来管理多频分配的方法，包括：a）测量位能量/噪声功率谱密度 Eb / No）和接收到的信号强度指示符（RSSI）; b）通知基站的测量Eb / No和RSSI; c）计算基站中的往返延迟（RTD）; d）基于测量的Eb / No，RSSI和所计算的RTD确定终端性能水平; 以及e）基于所确定的性能水平来确定频道和调制方案。

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：US20090196362A1

公开(公告)日：2009-08-06

申请号：US12304291

申请日：2006-09-28

申请人： Myung-Sun Song ,  Sung-Hyun Hwang ,  Gwang-Zeen Ko ,  Kyung-Hi Chang ,  Sung-Ho Park ,  Sang-Jun Ko ,  Joo Heo ,  Jung-Ju Kim

发明人： Myung-Sun Song ,  Sung-Hyun Hwang ,  Gwang-Zeen Ko ,  Kyung-Hi Chang ,  Sung-Ho Park ,  Sang-Jun Ko ,  Joo Heo ,  Jung-Ju Kim

IPC分类号： H04L27/28

CPC分类号： H04L5/0058 ,  H04B7/0408 ,  H04L1/0003 ,  H04L1/0009 ,  H04L5/0023 ,  H04L5/0032 ,  H04L5/0037 ,  H04L5/0046

摘要： Provided are a transmission method and apparatus for allocating a subchannel and forming a stationary beam to maximize transmission efficiency in an OFDMA based wireless communication system. The method includes determining the subchannel for the equipment of each user based on the channel state of the equipment of each user, determining a beam index for the equipment of each user, based on location information and direction of arrival information of the equipment of each user, generating an OFDM symbol by mapping a modulation symbol corresponding to the equipment of each user to the determined subchannel, and transmitting the generated OFDM symbol to a wireless space by forming a beam following the determined beam index. Using the method, the equipment of each user can be allocated with an advantageous subchannel, can remove an interference signal at low cost, and can increase total throughput of an OFDMA system downlink.

摘要翻译： 提供了一种用于分配子信道并形成固定波束以在基于OFDMA的无线通信系统中最大化传输效率的传输方法和装置。 该方法包括基于每个用户的设备的信道状态来确定每个用户的设备的子信道，基于每个用户的设备的位置信息和到达方向信息确定每个用户的设备的波束索引 通过将与每个用户的设备相对应的调制符号映射到所确定的子信道来生成OFDM符号，并且通过形成遵循所确定的波束索引的波束来将生成的OFDM符号发送到无线空间。 使用该方法，可以为每个用户的设备分配有利的子信道，可以以低成本去除干扰信号，并且可以增加OFDMA系统下行链路的总吞吐量。

公开(公告)号：US08199216B2

公开(公告)日：2012-06-12

申请号：US12495129

申请日：2009-06-30

申请人： Sung-Hyun Hwang

发明人： Sung-Hyun Hwang

IPC分类号： H04N9/73

CPC分类号： H04N1/58 ,  G06T3/4015 ,  G06T5/002 ,  G06T2207/10024 ,  G06T2207/20012 ,  G06T2207/20192 ,  H04N9/68

摘要： Provided are an apparatus and method for improving an image quality of an image sensor, capable of adaptively removing noise occurring in a de-mosaicking that is performed for generating three-channel data of R, G and B from a single channel pixel structure based on a bayer pattern. The apparatus includes a first converting unit for converting RGB color data into a YCbCr color data, the RGB color data being obtained from bayer data through a de-mosaicking, a noise removal unit for removing noise from a Cb and a Cr color data outputted from the first converting unit, and a second converting unit for converting the Cb and the Cr color data from the noise removal unit and a Y data from the first converting unit into the RGB color data.

摘要翻译： 提供了一种用于提高图像传感器的图像质量的装置和方法，该装置和方法能够自适应地去除从基于以下的单通道像素结构生成R，G和B的三通道数据而进行的去镶嵌中发生的噪声 拜耳模式 该装置包括用于将RGB颜色数据转换为YCbCr颜色数据的第一转换单元，通过去镶嵌获得的拜耳数据获得的RGB颜色数据，用于从Cb去除噪声的噪声去除单元和从Cb输出的Cr颜色数据 第一转换单元和用于将来自噪声去除单元的Cb和Cr颜色数据以及来自第一转换单元的Y数据转换成RGB颜色数据的第二转换单元。

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。