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1. 发明授权

US08040980B2 Log likelihood ratio calculation method, transmit signal detection method, and receiver 有权
标题翻译：对数似然比计算方法，发射信号检测方法和接收机
公开(公告)号：US08040980B2
公开(公告)日：2011-10-18
申请号：US12142600
申请日：2008-06-19
申请人： Seung Jae Bahng , Chang Wahn Yu , Young Jo Bang , Dae Ho Kim , Young Ha Lee , Youn-Ok Park
发明人： Seung Jae Bahng , Chang Wahn Yu , Young Jo Bang , Dae Ho Kim , Young Ha Lee , Youn-Ok Park
IPC分类号： H04L27/06 , H03K9/00 , H04L27/00
CPC分类号： H04L25/03318 , H04L25/0204 , H04L25/0246 , H04L25/067
摘要： The present invention relates to a log-likelihood ratio calculation method, a transmitting signal detection method, and a receiver. The present invention estimates a channel on the basis of the received signal and rearranges a plurality of layers. Further, at the time of rearrangement of the layers, a symbol of a layer having the lowest reliability is considered for every constellation dot, and the successive interference for the remaining layers is removed corresponding to the constellation dots of the layer having the lowest reliability to set the transmitting symbol candidate vector. Furthermore, a log-likelihood ratio for every bit of the plurality of layers is calculated using the transmitting symbol candidate vector to decode the channel.
摘要翻译：本发明涉及对数似然比计算方法，发送信号检测方法和接收机。本发明基于接收到的信号来估计信道并重排多个层。此外，在层的重排时，对于每个星座点考虑具有最低可靠性的层的符号，并且对应于具有最低可靠性的层的星座点去除对剩余层的连续干扰，设置发送符号候选向量。此外，使用发送符号候选向量计算多个层中的每一比特的对数似然比，以解码该信道。

2. 发明申请

US20080305804A1 Method and Apparatus for Uplink Timing Synchronization with Ranging Signal in Mobile Communication System 有权
标题翻译：移动通信系统中测距信号上行时序同步的方法与装置
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。

3. 发明申请

US20050141626A1 Uplink channel estimation system for orthogonal frequency division multiple access system and method thereof 有权
标题翻译：用于正交频分多址系统的上行链路信道估计系统及其方法
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。

4. 发明授权

US07742391B2 Apparatus and method for estimating frequency offset 有权
标题翻译：用于估计频率偏移的装置和方法
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。

5. 发明申请

US20070147225A1 Apparatus and method for estimating frequency offset 有权
标题翻译：用于估计频率偏移的装置和方法
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。

6. 发明申请

US20070133728A1 Apparatus and method for acquiring frame timing in communication system 有权
标题翻译：在通信系统中获取帧定时的装置和方法
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。

7. 发明申请

US20050135230A1 Apparatus and method for processing ranging channel in orthogonal frequency division multiple access system 有权
标题翻译：在正交频分多址系统中处理测距信道的装置和方法
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。

8. 发明授权

US08600420B2 Method and apparatus for uplink timing synchronization with ranging signal in mobile communication system 有权
标题翻译：用于在移动通信系统中与测距信号进行上行链路定时同步的方法和装置
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。

9. 发明授权

US08103273B2 Cell search device of cellular system using OFDMA scheme and method thereof 有权
标题翻译：使用OFDMA方案的蜂窝系统的小区搜索设备及其方法
公开(公告)号：US08103273B2
公开(公告)日：2012-01-24
申请号：US11721153
申请日：2005-11-30
申请人： Chang-Wahn Yu , Youn-Ok Park
发明人： Chang-Wahn Yu , Youn-Ok Park
IPC分类号： H04W36/00
CPC分类号： H04J11/0069 , H04J13/0022
摘要： A cell search device using an appropriate preamble for a downlink of a cellular system using an orthogonal frequency division multiplexing access (OFDMA) scheme and a method thereof is disclosed. The cell search device for a terminal of a cellular system using an orthogonal frequency division multiplexing access scheme includes when the terminal receives a preamble symbol from a base station, a PN code and phase delay estimating unit for generating a code with the received preamble symbol and a combination of a PN code and a Walsh code, calculating a correlation value therebetween using a differential demodulation for the codes to detect the PN code, a plurality of Walsh codes, and an error of a time delay, and estimating a component of a phase delay for the time delay; and a Walsh code estimating unit for minimizing the influence of the time error using the phase delay and the PN code information obtained by the differential demodulation of the PN code and phase delay estimating unit and estimating a Walsh code for the corresponding cell by synchronization demodulation.
摘要翻译：公开了一种使用正交频分复用接入（OFDMA）方案的蜂窝系统的下行链路的适当前导码的小区搜索装置及其方法。用于使用正交频分复用接入方式的蜂窝系统的终端的小区搜索装置包括当终端从基站接收到前导码符号时，PN码和相位延迟估计单元用于产生具有接收到的前导码符号的码， PN码和沃尔什码的组合，使用用于检测PN码的代码的差分解调，多个沃尔什码和时间延迟的误差来计算其间的相关值，并且估计相位的分量延迟延迟; 以及沃尔什码估计单元，用于使用相位延迟和通过PN码和相位延迟估计单元的差分解调获得的PN码信息来最小化时间误差的影响，并通过同步解调估计相应小区的沃尔什码。

10. 发明授权

US07817707B2 Apparatus and method for generating ranging pseudo noise code 有权
标题翻译：用于产生测距伪噪声码的装置和方法
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。

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