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：US07742391B2

公开(公告)日：2010-06-22

申请号：US11636809

申请日：2006-12-11

申请人： Chang-Wahn Yu ,  Youn-Ok Park

发明人： Chang-Wahn Yu ,  Youn-Ok Park

IPC分类号： H04J11/00

CPC分类号： H04L27/2657 ,  H04L27/0014 ,  H04L27/2675 ,  H04L2027/003 ,  H04L2027/0046 ,  H04L2027/0067 ,  H04L2027/0087

摘要： In a frequency offset estimating device of a subscriber station of a communication system in which a plurality of sectors are allocated to a cell, the frequency offset estimating device extracts a preamble sequence from a downlink frame signal. The frequency offset estimating device estimates a phase offset of a sector to which the subscriber station belongs among the sectors by using the preamble sequence, and calculates the autocorrelation value for the respective signals of the preamble sequence. The frequency offset estimating device compensates the autocorrelation value by using the phase offset, and estimates a frequency offset from the sum of the phase offset compensated autocorrelation values.

摘要翻译： 在将多个扇区分配给小区的通信系统的用户台的频率偏移估计装置中，频率偏移估计装置从下行链路帧信号中提取前置码序列。 频率偏移估计装置通过使用前置码序列来估计用户站所属的扇区的相位偏移，并且计算前导序列的各个信号的自相关值。 频率偏移估计装置通过使用相位偏移来补偿自相关值，并且从相位偏移补偿自相关值的和估计频率偏移。

公开(公告)号：US20070147225A1

公开(公告)日：2007-06-28

申请号：US11636809

申请日：2006-12-11

申请人： Chang-Wahn Yu ,  Youn-Ok Park

发明人： Chang-Wahn Yu ,  Youn-Ok Park

IPC分类号： H04J11/00 ,  H04J1/00

CPC分类号： H04L27/2657 ,  H04L27/0014 ,  H04L27/2675 ,  H04L2027/003 ,  H04L2027/0046 ,  H04L2027/0067 ,  H04L2027/0087

摘要： In a frequency offset estimating device of a subscriber station of a communication system in which a plurality of sectors are allocated to a cell, the frequency offset estimating device extracts a preamble sequence from a downlink frame signal. The frequency offset estimating device estimates a phase offset of a sector to which the subscriber station belongs among the sectors by using the preamble sequence, and calculates the autocorrelation value for the respective signals of the preamble sequence. The frequency offset estimating device compensates the autocorrelation value by using the phase offset, and estimates a frequency offset from the sum of the phase offset compensated autocorrelation values.

摘要翻译： 在将多个扇区分配给小区的通信系统的用户台的频率偏移估计装置中，频率偏移估计装置从下行链路帧信号中提取前置码序列。 频率偏移估计装置通过使用前置码序列来估计用户站所属的扇区的相位偏移，并且计算前导序列的各个信号的自相关值。 频率偏移估计装置通过使用相位偏移来补偿自相关值，并且从相位偏移补偿自相关值的和估计频率偏移。

公开(公告)号：US20070133728A1

公开(公告)日：2007-06-14

申请号：US11636797

申请日：2006-12-11

申请人： Seung-Jae Bahng ,  Youn-Ok Park ,  Chang-Wahn Yu ,  Eon-Young Hong

发明人： Seung-Jae Bahng ,  Youn-Ok Park ,  Chang-Wahn Yu ,  Eon-Young Hong

IPC分类号： H04L25/38

CPC分类号： H04L27/2656 ,  H04L27/2676

摘要： Disclosed is an apparatus for acquiring initial frame timing in a communication system having a normalizer that calculates a normalized window power from powers of samples of received signal during a monitoring period, a cross power calculator that calculates a window cross power from cross powers of the samples during the monitoring period, and each cross power corresponds to multiplication of two of the samples, a divider that divides the window cross power by the normalized window power and outputs a metric for a sample corresponding to the monitoring period, and a peak-value detector that searches a sample having the maximum value among metrics for the samples of the received signals during a predetermined period, and the metrics are calculated by shifting the monitoring period, with a sample next to the sample searched by the peak-value detector being determined as a starting point of a frame.

摘要翻译： 公开了一种用于在具有归一化器的通信系统中获取初始帧定时的装置，该归一化器根据监视期间的接收信号的采样功率计算归一化窗功率;交叉功率计算器，其从样本的交叉功率计算窗口交叉功率 在监视期间，并且每个交叉功率对应于两个样本的乘法，分频器将窗口交叉功率除以归一化窗功率，并输出对应于监视周期的样本的度量，以及峰值检测器 在预定时间段内搜索具有接收信号样本的度量中的最大值的样本，并且通过将监测周期移位，通过峰值检测器搜索的样本旁边的样本被确定为 一个框架的起点。

公开(公告)号：US20050135230A1

公开(公告)日：2005-06-23

申请号：US10923136

申请日：2004-08-19

申请人： Chang-Wahn Yu ,  Kyung-Yeol Sohn ,  Youn-Ok Park ,  Seung-Ku Hwang

发明人： Chang-Wahn Yu ,  Kyung-Yeol Sohn ,  Youn-Ok Park ,  Seung-Ku Hwang

IPC分类号： H04J11/00 ,  H04L5/02

CPC分类号： H04L5/023

摘要： Disclosed is an apparatus and method for processing a ranging channel in an OFDMA system. The apparatus converts received ranging complex signals to polar coordinate signals having a signal magnitude and a phase, and the received converted signals are each represented by a signal magnitude component and a phase component. A predetermined phase component of a signal according to a phase rotation is used to estimate a time delay by an addition operation of the phase of the received signal and the phase according to the phase rotation. Accordingly, the time delay and the power of each reverse link user of the OFDMA mobile communication system can be calculated by arithmetic operations of addition components instead of multiplication components, resulting in the reduction of complexity.

摘要翻译： 公开了一种在OFDMA系统中处理测距信道的装置和方法。 该装置将接收到的测距复合信号转换为具有信号幅度和相位的极坐标信号，并且接收的转换信号各自由信号幅度分量和相位分量表示。 根据相位旋转的信号的预定相位分量用于通过根据相位旋转的接收信号的相位和相位的相加运算来估计时间延迟。 因此，可以通过加法分量的算术运算而不是乘法分量来计算OFDMA移动通信系统的每个反向链路用户的时延和功率，从而降低复杂度。