公开(公告)号：US20090225704A1

公开(公告)日：2009-09-10

申请号：US11721122

申请日：2005-12-09

申请人： Young-Ha Lee ,  Chang-Wahn Yu ,  Jun-Woo Kim ,  Youn-Ok Park

发明人： Young-Ha Lee ,  Chang-Wahn Yu ,  Jun-Woo Kim ,  Youn-Ok Park

IPC分类号： H04W72/04

CPC分类号： H04L5/0007 ,  H04L5/0044 ,  H04L5/0053 ,  H04L5/0094

摘要： A tile index generation apparatus for allocating subchannels of a control channel and a diversity channel, a subchannel allocation apparatus for allocating subchannels of a diversity channel, and a subchannel allocation apparatus for allocating subchannels of an adaptive modulation coding (AMC) channel, which are used for an uplink of an orthogonal frequency division multiplexing access (OFDMA) system, are provided. With these subchannel allocation apparatuses, optimum designs for the uplink subchannel allocation in the OFDM scheme can be provided to a modulator of a subscriber station and a demodulator of a base station, and so the uplink subchannel allocation apparatus has a simple structure and an enhanced transmission speed.

摘要翻译： 一种用于分配控制信道和分集信道的子信道的瓦片索引生成装置，用于分配分集信道的子信道的子信道分配装置和用于分配自适应调制编码（AMC）信道的子信道的子信道分配装置，其被使用 用于正交频分复用接入（OFDMA）系统的上行链路。 利用这些子信道分配装置，OFDM方式中的上行链路子信道分配的最佳设计可以提供给用户台的调制器和基站的解调器，因此上行链路子信道分配装置具有简单的结构和增强的传输 速度。

公开(公告)号：US07302022B2

公开(公告)日：2007-11-27

申请号：US10687355

申请日：2003-10-15

申请人： Jun-Woo Kim ,  Young-Ha Lee ,  Chang-Wahn Yu ,  Dae-Ho Kim ,  Youn-Ok Park

发明人： Jun-Woo Kim ,  Young-Ha Lee ,  Chang-Wahn Yu ,  Dae-Ho Kim ,  Youn-Ok Park

IPC分类号： H04L27/08

CPC分类号： H04L27/261 ,  H03G3/3089

摘要： Disclosed is an AGC (automatic gain control) device and method of an OFDM system with a DC offset compensation function, and a recording medium storing a program including the method. The AGC device calculates an energy of input signals with DC offsets as the summation of the square of the input signals, and calculates an energy of the DC offsets in the input signals as the summation of the square of the DC offsets. Pure signal energy without DC offsets is produced by subtracting the energy of the DC offsets from the energy of the calculated input signal. The energy and an AGC reference value are then compared, and feedback of a comparison result is performed.

摘要翻译： 公开了具有DC偏移补偿功能的OFDM系统的AGC（自动增益控制）装置和方法，以及存储包括该方法的程序的记录介质。 AGC装置使用DC偏移量计算输入信号的能量作为输入信号的平方的总和，并且计算输入信号中的DC偏移的能量作为DC偏移的平方的总和。 没有DC偏移的纯信号能量通过从计算的输入信号的能量中减去DC偏移的能量来产生。 然后比较能量和AGC参考值，并执行比较结果的反馈。

公开(公告)号：US20080305804A1

公开(公告)日：2008-12-11

申请号：US12094763

申请日：2006-12-08

申请人： Young-Ha Lee ,  Chang-Wahn Yu ,  Youn-Ok Park

发明人： Young-Ha Lee ,  Chang-Wahn Yu ,  Youn-Ok Park

IPC分类号： H04Q7/20 ,  H04M1/00

CPC分类号： H04L27/2655 ,  H04L27/2646

摘要： When a base station of a time division duplex based mobile communication system receives an initial ranging request signal from a subscriber station, the base station generates initial ranging information including delay time information to the subscriber station, and receives uplink data delayed and transmitted using a delay time from the subscriber station. Also, when the subscriber station transmits an initial ranging request signal to the base station and receives initial ranging information including delay time information from the base station, the subscriber station establishes a transmission parameter value by using the transmission parameter value included in the initial ranging information and transmits uplink data by using the established delay time.

摘要翻译： 当基于时分双工的移动通信系统的基站从用户站接收到初始测距请求信号时，基站向用户站生成包括延迟时间信息的初始测距信息，并且接收延迟并使用延迟发送的上行链路数据 来自用户站的时间。 此外，当用户台向基站发送初始测距请求信号并从基站接收包括延迟时间信息的初始测距信息时，用户台通过使用包含在初始测距信息中的传输参数值来建立传输参数值 并通过使用建立的延迟时间来发送上行链路数据。

公开(公告)号：US20050141626A1

公开(公告)日：2005-06-30

申请号：US10970208

申请日：2004-10-20

申请人： Young-Ha Lee ,  Chang-Wahn Yu ,  Youn-Ok Park ,  Seung-Ku Hwang

发明人： Young-Ha Lee ,  Chang-Wahn Yu ,  Youn-Ok Park ,  Seung-Ku Hwang

IPC分类号： H04J11/00 ,  H04K1/10 ,  H04L5/02 ,  H04L25/02 ,  H04L27/26

CPC分类号： H04L25/0232 ,  H04L5/023

摘要： In the uplink of an OFDMA system, a preamble is used to estimate a channel and then the pilot tones of a data symbol are used for channel estimation to update the channel estimate. The channel estimate is used for channel compensation, and the phase of the channel is corrected using the channel estimate obtained from the pilot tones. In this way, the channel estimation performance and hence the compensation ability can be enhanced.

摘要翻译： 在OFDMA系统的上行链路中，使用前导码来估计信道，然后将数据符号的导频音调用于信道估计以更新信道估计。 信道估计用于信道补偿，并且使用从导频音获得的信道估计来校正信道的相位。 以这种方式，可以提高信道估计性能和补偿能力。

公开(公告)号：US08600420B2

公开(公告)日：2013-12-03

申请号：US12094763

申请日：2006-12-08

申请人： Young-Ha Lee ,  Chang-Wahn Yu ,  Youn-Ok Park

发明人： Young-Ha Lee ,  Chang-Wahn Yu ,  Youn-Ok Park

IPC分类号： H04B15/00 ,  H04W72/00 ,  H04W74/00 ,  H04W4/00 ,  H04J3/06

CPC分类号： H04L27/2655 ,  H04L27/2646

摘要： When a base station of a time division duplex based mobile communication system receives an initial ranging request signal from a subscriber station, the base station generates initial ranging information including delay time information to the subscriber station, and receives uplink data delayed and transmitted using a delay time from the subscriber station. Also, when the subscriber station transmits an initial ranging request signal to the base station and receives initial ranging information including delay time information from the base station, the subscriber station establishes a transmission parameter value by using the transmission parameter value included in the initial ranging information and transmits uplink data by using the established delay time.

摘要翻译： 当基于时分双工的移动通信系统的基站从用户站接收到初始测距请求信号时，基站向用户站生成包括延迟时间信息的初始测距信息，并且接收延迟并使用延迟发送的上行链路数据 来自用户站的时间。 此外，当用户台向基站发送初始测距请求信号并从基站接收包括延迟时间信息的初始测距信息时，用户台通过使用包含在初始测距信息中的传输参数值来建立传输参数值 并通过使用建立的延迟时间来发送上行链路数据。

公开(公告)号：US07428267B2

公开(公告)日：2008-09-23

申请号：US10970208

申请日：2004-10-20

申请人： Young-Ha Lee ,  Chang-Wahn Yu ,  Youn-Ok Park ,  Seung-Ku Hwang

发明人： Young-Ha Lee ,  Chang-Wahn Yu ,  Youn-Ok Park ,  Seung-Ku Hwang

IPC分类号： H04K1/10 ,  H04L27/28

CPC分类号： H04L25/0232 ,  H04L5/023

摘要： In the uplink of an OFDMA system, a preamble is used to estimate a channel and then the pilot tones of a data symbol are used for channel estimation to update the channel estimate. The channel estimate is used for channel compensation, and the phase of the channel is corrected using the channel estimate obtained from the pilot tones. In this way, the channel estimation performance and hence the compensation ability can be enhanced.

摘要翻译： 在OFDMA系统的上行链路中，使用前导码来估计信道，然后将数据符号的导频音调用于信道估计以更新信道估计。 信道估计用于信道补偿，并且使用从导频音获得的信道估计来校正信道的相位。 以这种方式，可以提高信道估计性能和补偿能力。

公开(公告)号：US08718153B2

公开(公告)日：2014-05-06

申请号：US12105172

申请日：2008-04-17

申请人： Jun-Woo Kim ,  Dae-Ho Kim ,  Young-Ha Lee ,  Youn-Ok Park

发明人： Jun-Woo Kim ,  Dae-Ho Kim ,  Young-Ha Lee ,  Youn-Ok Park

IPC分类号： H04K1/10 ,  H04L27/28

CPC分类号： H04L27/2607 ,  H04L27/263

摘要： The present invention relates to a signal transmitting apparatus, a method thereof, and an inverse fast Fourier transform (IFFT) apparatus for a signal transmitting apparatus. A signal transmitting apparatus according to an embodiment of the present invention receives data, and performs inverse fast Fourier transform (IFFT) on the data on the basis of a twiddle factor for shifting output data by the size of a cyclic prefix. In addition, the signal transmitting apparatus sequentially stores data corresponding to the size of the cyclic prefix starting with initial data among the transformed data, and generates an OFDM symbol on the basis of the stored data and the transformed data. According to the embodiment of the present invention, it is possible to efficiently reduce a time delay and a memory use amount when a cyclic prefix is added at a transmitting end, without changing the size of hardware and power consumption.

摘要翻译： 信号发送装置及其方法技术领域本发明涉及信号发送装置及其方法以及信号发送装置的快速傅里叶逆变换（IFFT）装置。 根据本发明的实施例的信号发送装置接收数据，并且基于用于根据循环前缀的大小移位输出数据的旋转因子对数据进行快速傅立叶逆变换（IFFT）。 此外，信号发送装置顺序地存储与变换数据中的初始数据开始的循环前缀的大小相对应的数据，并且根据存储的数据和变换后的数据生成OFDM符号。 根据本发明的实施例，可以有效地减少在发送端添加循环前缀的时间延迟和存储器使用量，而不改变硬件和功耗的大小。

公开(公告)号：US08134914B2

公开(公告)日：2012-03-13

申请号：US11721136

申请日：2005-11-10

申请人： Jun-Woo Kim ,  Su-Chang Chae ,  Young-Ha Lee ,  Eon-Young Hong ,  Youn-Ok Park

发明人： Jun-Woo Kim ,  Su-Chang Chae ,  Young-Ha Lee ,  Eon-Young Hong ,  Youn-Ok Park

IPC分类号： H04J11/00

CPC分类号： H04L5/0044 ,  H04L5/0048 ,  H04L5/0092

摘要： A subcarrier allocating apparatus allocating data to be transmitted to a plurality of orthogonal subcarriers in an orthogonal frequency division multiplexing (OFDM) system is provided. The apparatus includes a logical index generator generating a logical index for allocating a data subcarrier to a physical index, the logical index being included with only data subcarriers and the physical index indicating a location of a substantial subcarrier within a symbol, an intermediate index converter converting the logical index into an intermediate index by performing a given operation on the generated logical index and a pilot location constant, and a physical index converter converting the intermediate index into a physical index based on the number of data subcarriers on the left and right sides of a null subcarrier for insertion of a guard interval formed by the null subcarrier.

摘要翻译： 提供了一种在正交频分复用（OFDM）系统中分配要发送到多个正交子载波的数据的副载波分配装置。 该装置包括逻辑索引生成器，其生成用于将数据子载波分配给物理索引的逻辑索引，所述逻辑索引仅包括数据子载波，并且所述物理索引指示符号内的实质子载波的位置，中间索引转换器转换 通过对所生成的逻辑索引和导频位置常数执行给定的操作而将中间索引的逻辑索引转换成中间索引;以及物理索引转换器，其基于左侧和右侧的数据子载波的数量将中间索引转换为物理索引 用于插入由无效副载波形成的保护间隔的无效副载波。

公开(公告)号：US20100061223A1

公开(公告)日：2010-03-11

申请号：US11721136

申请日：2005-11-10

申请人： Jun-Woo Kim ,  Su-Chang Chae ,  Young-Ha Lee ,  Eon-Young Hong ,  Youn-Ok Park

发明人： Jun-Woo Kim ,  Su-Chang Chae ,  Young-Ha Lee ,  Eon-Young Hong ,  Youn-Ok Park

IPC分类号： H04J1/00 ,  H04J11/00 ,  H04L27/28 ,  H04B15/00

CPC分类号： H04L5/0044 ,  H04L5/0048 ,  H04L5/0092

摘要： A subcarrier allocating apparatus allocating data to be transmitted to a plurality of orthogonal subcarriers in an orthogonal frequency division multiplexing (OFDM) system, the apparatus including: a logical index generator (142) generating a logical index for allocating a data subcarrier to a physical index, the logical index being included with only data subcarriers and the physical index indicating a location of a substantial subcarrier within a symbol; an intermediate index converter (144) converting the logical index into an intermediate index by performing a given operation on the generated logical index and a pilot location constant; and a physical index converter (146) converting the intermediate index into a physical index based on the number of data subcarriers on the left and right sides of a null subcarrier for insertion of a guard interval formed by the null subcarrier.

摘要翻译： 一种子载波分配装置，在正交频分复用（OFDM）系统中分配要发送到多个正交子载波的数据，该装置包括：逻辑索引发生器，产生用于将数据子载波分配到物理索引的逻辑索引 逻辑索引仅包括数据子载波，物理索引指示符号内的实质子载波的位置; 中间索引转换器（144），通过对所生成的逻辑索引和导频位置常数执行给定的操作将逻辑索引转换成中间索引; 以及物理索引转换器（146），其基于用于插入由所述无效副载波形成的保护间隔的无效副载波的左侧和右侧的数据子载波的数量将所述中间索引转换为物理索引。

公开(公告)号：US20050141474A1

公开(公告)日：2005-06-30

申请号：US10971787

申请日：2004-10-21

申请人： Young-Ha Lee ,  Jun-Woo Kim ,  Youn-Ok Park ,  Seung-Ku Hwang

发明人： Young-Ha Lee ,  Jun-Woo Kim ,  Youn-Ok Park ,  Seung-Ku Hwang

IPC分类号： H04J11/00 ,  H04J3/06 ,  H04L5/02 ,  H04L27/26

CPC分类号： H04J3/0682 ,  H04L5/023 ,  H04L27/2655

摘要： Disclosed is a ranging system and method in an OFDMA system. The ranging system includes complex exponential twiddle storage units for respectively storing complex exponential twiddle factors corresponding to a timing error, complex multipliers for respectively complex-multiplying the complex exponential twiddle factors by received uplink ranging data, code correlators for respectively correlating the outputs of the complex multipliers and ranging codes, and threshold comparators for respectively comparing the outputs of the code correlators with a threshold.

摘要翻译： 公开了OFDMA系统中的测距系统和方法。 测距系统包括用于分别存储对应于定时误差的复指数旋转因子的复指数旋转存储单元，用于分别复数乘以接收的上行测距数据的复指数旋转因子的复乘数，用于分别将复数的输出相关联的码相关器 乘法器和测距码，以及用于分别比较码相关器的输出与阈值的阈值比较器。