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。

公开(公告)号：US07515641B2

公开(公告)日：2009-04-07

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： H04K1/10

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。

公开(公告)号：US07817707B2

公开(公告)日：2010-10-19

申请号：US11791055

申请日：2005-11-11

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

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

IPC分类号： H04B1/69 ,  H04B1/707 ,  H04B1/713

CPC分类号： H04J13/10 ,  H04J13/0022

摘要： Disclosed is an apparatus for generating a ranging pseudo noise (PN) code used in a base station of a portable internet system of an orthogonal frequency division multiplexing access scheme, wherein a ranging pseudo noise mask value is generated using a cell ID number, and then the generated ranging pseudo noise mask value is stored in a memory. A final ranging PN code is generated using the stored ranging PN mask value and a status of a pseudo random binary sequence for generating a ranging PN code. With such a structure, the maximal 256-numbered ranging PN code values can be obtained simultaneously with each 144 bit-length.

摘要翻译： 公开了一种用于生成在正交频分复用接入方案的便携式互联网系统的基站中使用的测距伪噪声（PN）码的装置，其中使用小区ID号生成测距伪噪声掩码值，然后 生成的测距伪噪声掩码值被存储在存储器中。 使用所存储的测距PN掩码值和用于生成测距PN码的伪随机二进制序列的状态来生成最终测距PN码。 利用这种结构，可以同时获得每个144位长度的最大256个测距PN码值。

公开(公告)号：US20080170632A1

公开(公告)日：2008-07-17

申请号：US11791055

申请日：2005-11-11

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

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

IPC分类号： H04J11/00 ,  H04L27/28

CPC分类号： H04J13/10 ,  H04J13/0022

摘要： Disclosed is an apparatus for generating a ranging pseudo noise (PN) code used in a base station of a portable internet system of an orthogonal frequency division multiplexing access scheme, wherein a ranging pseudo noise mask value is generated using a cell ID number, and then the generated ranging pseudo noise mask value is stored in a memory. A final ranging PN code is generated using the stored ranging PN mask value and a status of a pseudo random binary sequence for generating a ranging PN code. With such a structure, the maximal 256-numbered ranging PN code values can be obtained simultaneously with each 144 bit-length.

摘要翻译： 公开了一种用于生成在正交频分复用接入方案的便携式互联网系统的基站中使用的测距伪噪声（PN）码的装置，其中使用小区ID号生成测距伪噪声掩码值，然后 生成的测距伪噪声掩码值被存储在存储器中。 使用所存储的测距PN掩码值和用于生成测距PN码的伪随机二进制序列的状态来生成最终测距PN码。 利用这种结构，可以同时获得每个144位长度的最大256个测距PN码值。

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：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：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：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。