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11. 发明授权

US07734988B2 Method for puncturing a low density parity check code 有权
标题翻译：打孔低密度奇偶校验码的方法
公开(公告)号：US07734988B2
公开(公告)日：2010-06-08
申请号：US11541749
申请日：2006-10-02
申请人： Dong-Ho Kim , Yung-Soo Kim , Ye-Hoon Lee , Myeon-Gyun Cho , Hyo-Yol Park , Keum-Chan Whang , Kwang-Soon Kim , Jae-Won Kang
发明人： Dong-Ho Kim , Yung-Soo Kim , Ye-Hoon Lee , Myeon-Gyun Cho , Hyo-Yol Park , Keum-Chan Whang , Kwang-Soon Kim , Jae-Won Kang
IPC分类号： H03M13/35
CPC分类号： H03M13/1102 , H03M13/6306 , H03M13/6362
摘要： A method for puncturing a Low Density Parity Check (LDPC). The method includes a) setting a codeword length and the total number of bit nodes to be punctured; b) selecting a check node (or check nodes) with highest priority excluding check nodes completely checked in a current round; c) selecting a bit node (or bit nodes) with a highest priority excluding bit nodes completely checked among bit nodes connected to the selected check node (or check nodes); d) determining whether the selected bit node is a bit node to be punctured, that is, it is not systematic, not set by a puncturing prohibition flag; e) puncturing an associated bit node if the selected bit node is the bit node to be punctured, setting unpunctured bit nodes connected to the selected check node by a puncturing prohibition flag, decreasing the number of remained bit nodes to be punctured by 1 and increasing the number of connected punctured node of associated check node by 1; f) determining whether the number of remaining bits to be punctured is greater than 0; and g) returning to step b) if the number of remaining bits to be punctured is greater than 0, and ending a puncturing process if the number of remaining bits to be punctured is not greater than 0.
摘要翻译：一种用于打孔低密度奇偶校验（LDPC）的方法。该方法包括：a）设置码字长度和要被穿孔的比特节点的总数; b）选择具有最高优先级的校验节点（或校验节点），不包括在当前轮次中完全检查的校验节点; c）选择具有最高优先级的比特节点（或比特节点），不包括连接到所选择的校验节点（或校验节点）的比特节点之间完全检查的比特节点; d）确定所选择的比特节点是否是要被穿孔的比特节点，即，它不是系统的，不被打孔禁止标志设置; e）如果选择的比特节点是要被穿孔的比特节点，则对相关联的比特节点进行穿孔，通过打孔禁止标志来设置连接到所选择的校验节点的未穿孔比特节点，将要被穿孔的剩余比特节点的数量减少1并增加相关检查节点的连接穿孔节点数目为1; f）确定要穿孔的剩余比特数是否大于0; 以及g）如果要删除的剩余比特数大于0，则返回到步骤b），并且如果要穿孔的剩余比特数不大于0，则结束打孔处理。

12. 发明授权

US07515902B2 Velocity estimation apparatus in mobile communication environments 有权
标题翻译：移动通信环境中的速度估计装置
公开(公告)号：US07515902B2
公开(公告)日：2009-04-07
申请号：US11143074
申请日：2005-06-02
申请人： Goo-Hyun Park , Dae-Sik Hong , Ye-Hoon Lee , Eung-Sun Kim , Myeon-Gyun Cho , Jong-Hyeuk Lee
发明人： Goo-Hyun Park , Dae-Sik Hong , Ye-Hoon Lee , Eung-Sun Kim , Myeon-Gyun Cho , Jong-Hyeuk Lee
IPC分类号： H04Q7/20
CPC分类号： G01S11/10 , H04W64/006
摘要： Disclosed is a method for estimating the velocity of a mobile station in Rician fading environments in which a direct wave exists. Cellular mobile communication environments include two environments, Rician fading environments in which a direct wave exists and Rayleigh fading environments in which a direct wave does not exist. Generally, many methods for estimating the velocity of a mobile station have been known in Rayleigh fading environments. However, in Rician fading environments in which a direct wave exists, many errors occurs in estimating the velocity of a mobile station due to difficulty in estimation of a Rician coefficient K and an incident angle θ0. According to the invention, a method is provided wherein error is mostly eliminated in estimating the velocity of a mobile station by obtaining a maximum Doppler frequency of the mobile station, even without directly obtaining a Rician coefficient K and an incident angle θ0.
摘要翻译：公开了一种用于估计在存在直接波的Rician衰落环境中的移动台的速度的方法。蜂窝移动通信环境包括两个环境，其中存在直接波的Rician衰落环境和不存在直接波的瑞利衰落环境。通常，用于估计移动台的速度的许多方法在瑞利衰落环境中是已知的。然而，在存在直接波的Rician衰落环境中，由于难以估计Rician系数K和入射角θ0，在估计移动台的速度时出现许多错误。根据本发明，提供了一种方法，其中即使没有直接获得Rician系数K和入射角θ0，通过获得移动台的最大多普勒频率来估计移动台的速度，大多数地消除了误差。

13. 发明申请

US20060153060A1 Method of reducing feedback channel state information within adaptive ofdma system and adaptive ofdma system using the same 失效
标题翻译：减少自适应系统中的反馈信道状态信息的方法和使用该方法的自适应系统
公开(公告)号：US20060153060A1
公开(公告)日：2006-07-13
申请号：US10545047
申请日：2004-02-09
申请人： Myeon-Gyun Cho
发明人： Myeon-Gyun Cho
IPC分类号： H04B7/00 , H04J11/00 , H04B1/00
CPC分类号： H04L1/0026 , H04B7/0619 , H04L1/0003 , H04L1/0009 , H04L1/0027 , H04L5/023 , H04L27/2601
摘要： A method of reducing channel state information fed back in an adaptive orthogonal frequency division multiple access system when transmitting and receiving data packets between a base station and a mobile station using an orthogonal frequency division multiplexing method comprising adaptive modulation and coding. The method includes: transmitting a data packet comprising information as to whether adaptive modulation and coding is on or off from the base station to the mobile station via a downlink; and tracking a modulation and coding scheme level only when it is determined that adaptive modulation and coding is performed based on the information as to whether adaptive modulation and coding is on or off and feeding back the channel state information obtained from the tracking result from the mobile station to the base station via an uplink.
摘要翻译：一种在使用包括自适应调制和编码的正交频分复用方法在基站和移动台之间发送和接收数据分组时减少在自适应正交频分多址系统中反馈的信道状态信息的方法。该方法包括：经由下行链路，从基站向移动台发送包括关于自适应调制和编码是开启还是关闭的信息的数据分组; 以及仅当基于关于自适应调制和编码开启或关闭的信息确定执行自适应调制和编码时才跟踪调制和编码方案级别，并且从移动台反馈从跟踪结果获得的信道状态信息通过上行链路站到基站。

14. 发明申请

US20070036068A1 Two-dimensional spreading method for an OFDM-CDM system 审中-公开
标题翻译：用于OFDM-CDM系统的二维扩展方法
公开(公告)号：US20070036068A1
公开(公告)日：2007-02-15
申请号：US11497583
申请日：2006-08-02
申请人： Myeon-Gyun Cho , Cheol-Woo You , Jong-Hyung Kwun
发明人： Myeon-Gyun Cho , Cheol-Woo You , Jong-Hyung Kwun
IPC分类号： H04J11/00 , H04J13/00
CPC分类号： H04L5/0017 , H04B1/713 , H04L5/0041 , H04L27/2605
摘要： A transmission apparatus and method for a communication system based on Orthogonal Frequency Division Multiplexing-Code Division Multiplexing (OFDM-CDM). A frequency spreader multiplies symbols to be transmitted by a frequency spreading factor and outputs frequency spread symbols whose number corresponds to the frequency spreading factor. Buffers whose number corresponds to the frequency spreading factor temporarily store the frequency spread symbols in a unit of a predefined number of symbols. A time spreader multiplies parallel frequency spread symbols from the buffers by a time spreading factor and outputs frequency-time spread symbols. An Inverse Fast Fourier Transform (IFFT) processor performs IFFT on the frequency-time spread symbols, and outputs an OFDM symbol. A Guard Interval (GI) inserter inserts a GI into a signal output from the IFFT processor and transmits the signal. The system can obtain complete diversity gain and residual gain due to the effect of a time-varying channel in any channel environment.
摘要翻译：一种基于正交频分复用码分多路复用（OFDM-CDM）的通信系统的发送装置和方法。频率扩展器将通过频率扩展因子发送的符号相乘，并输出数字对应于频率扩展因子的频率扩展符号。其数量对应于频率扩展因子的缓冲器以预定数量的符号的单位临时存储频率扩展符号。时间扩展器将来自缓冲器的并行频率扩展符号乘以时间扩展因子并输出频率 - 时间扩展符号。逆快速傅里叶变换（IFFT）处理器对频率 - 时间扩展符号执行IFFT，并输出OFDM符号。保护间隔（GI）插入器将GI插入从IFFT处理器输出的信号中并发送信号。由于任何信道环境中时变信道的影响，系统可以获得完整的分集增益和剩余增益。

15. 发明授权

US07386277B2 Communication system and method for increasing communication efficiency 有权
标题翻译：提高通信效率的通信系统和方法
公开(公告)号：US07386277B2
公开(公告)日：2008-06-10
申请号：US10233014
申请日：2002-09-03
申请人： Myeon-gyun Cho , Ho-jin Kim
发明人： Myeon-gyun Cho , Ho-jin Kim
IPC分类号： H04B1/00
CPC分类号： H04L1/1671 , H04L1/0003 , H04L1/0009 , H04L1/0025 , H04L1/0029 , H04L1/0034
摘要： A mobile communication system capable of increasing communication efficiency and a method therefor are provided, including a receiver for grouping n MCS levels (where n>0) into continuous m MCS levels (where n>m>0) according to the quality of a data channel for transmitting an information signal, and sending information on an MCS group using a pilot signal, and an ACK or an NACK signal, which indicates whether the information signal is completely received; and a transmitter for storing information on the n MCS levels, extracting the m MCS levels according to the information on the MCS group transmitted from the receiver, determining one of the extracted m MCS levels as an initial MCS level, modulating and coding information data to be transmitted according to the initial MCS level and transmitting the result to the receiver, and changing the current MCS level in response to the ACK or the NACK signal.
摘要翻译：提供了能够提高通信效率的移动通信系统及其方法，包括根据数据质量将n个MCS级别（其中n> 0）分组成连续m个MCS级别（其中n> m> 0）的接收机用于发送信息信号的信道，以及使用导频信号发送关于MCS组的信息，以及指示信息信号是否被完全接收的ACK或NACK信号; 以及发送器，用于存储关于n个MCS级别的信息，根据从接收器发送的关于MCS组的信息提取m个MCS级别，将所提取的m个MCS级别中的一个确定为初始MCS级别，将信息数据调制和编码根据初始MCS级别进行发送，并将结果发送给接收机，并根据ACK或NACK信号改变当前的MCS级别。

16. 发明申请

US20080096488A1 Apparatus and method for transmitting and receiving data in a communication system 审中-公开
标题翻译：用于在通信系统中发送和接收数据的装置和方法
公开(公告)号：US20080096488A1
公开(公告)日：2008-04-24
申请号：US11645415
申请日：2006-12-26
申请人： Myeon-Gyun Cho , Sung-Jin Kim , Ho-Jin Kim , In-Soo Hwang
发明人： Myeon-Gyun Cho , Sung-Jin Kim , Ho-Jin Kim , In-Soo Hwang
IPC分类号： H04B1/00 , H04B1/02
CPC分类号： H04B7/0417 , H04B7/0632
摘要： For data transmission/reception in a communication system, a transmitter precodes data to be transmitted via at least two antennas, with use of at least one precoding matrix of a predetermined rank, and transmits the precoded data to a receiver. A receiver receives a signal which is precoded with a precoding matrix of a predetermined rank, detects the precoding matrix, calculates a sum rate corresponding to the detected precoding matrix, and feeds back quality information on a channel formed between a transmitter and the receiver when the calculated sum rate falls within a predetermined rank among sum rates calculated for all precoding matrixes.
摘要翻译：对于通信系统中的数据发送/接收，发送器利用至少一个预定等级的预编码矩阵，经由至少两个天线来对数据进行发送，并将预编码的数据发送到接收机。接收机接收用预定秩的预编码矩阵预编码的信号，检测预编码矩阵，计算与检测到的预编码矩阵相对应的和速率，并且当发送机与接收机之间形成的信道上的质量信息反馈时计算出的和速率落入针对所有预编码矩阵计算的总和速率之内的预定等级。

17. 发明申请

US20070249401A1 Method for transmitting data in a communication system 有权
标题翻译：在通信系统中发送数据的方法
公开(公告)号：US20070249401A1
公开(公告)日：2007-10-25
申请号：US11702907
申请日：2007-02-06
申请人： Sung-Jin Kim , Myeon-Gyun Cho , Ho-Jin Kim
发明人： Sung-Jin Kim , Myeon-Gyun Cho , Ho-Jin Kim
IPC分类号： H04M1/00
CPC分类号： H04B7/0452 , H04B7/063 , H04B7/0632 , H04B7/0689 , H04B7/0691
摘要： A method is provided a method for transmitting data in a MIMO communication system. The method includes receiving feedback information including channel quality information of transmission antennas from terminals; selecting one of a multi-user mode and a single user mode according to the channel quality information; extracting information for the selected mode from the feedback information; selecting at least one terminal and a preceding matrix of at least one transmission antenna through which data is transmitted according to the extracted information and the selected mode; and transmitting data using the selected precoding matrix and information of the selected terminal.
摘要翻译：提供了一种在MIMO通信系统中发送数据的方法。该方法包括从终端接收包括发送天线的信道质量信息的反馈信息; 根据信道质量信息选择多用户模式和单用户模式之一; 从反馈信息中提取所选模式的信息; 根据所提取的信息和所选择的模式，选择数据被发送的至少一个发射天线的至少一个终端和前一矩阵; 以及使用所选择的预编码矩阵和所选择的终端的信息来发送数据。

18. 发明申请

US20070207810A1 System and method for allocating a channel in a communication system 有权
标题翻译：用于在通信系统中分配信道的系统和方法
公开(公告)号：US20070207810A1
公开(公告)日：2007-09-06
申请号：US11706853
申请日：2007-02-15
申请人： Myeon-Gyun Cho , Yung-Soo Kim , Hyung-Myung Kim , Tae-Sung Kang , Dae-Hyun Kim , Woo-Geun Ahn
发明人： Myeon-Gyun Cho , Yung-Soo Kim , Hyung-Myung Kim , Tae-Sung Kang , Dae-Hyun Kim , Woo-Geun Ahn
IPC分类号： H04Q7/20 , H04B1/26
CPC分类号： H04W72/0406 , H04L1/0026 , H04L5/023 , H04L27/2608 , H04W72/085
摘要： A method and system for allocating a channel are provided in a communication system including a plurality of Mobile Stations (MSs) and Base Stations (BSs) for providing a communication service to the plurality of MSs. A BS transmits an average Channel Quality Information (CQI) request to MSs. The MSs measure CQI with respect to their channels in response to the request from the BS, compute average CQI from the measured CQI, and transmit the average CQI to the BS. The BS selects a predefined number of MSs according to the average CQI received from the MSs and sets an MS group. The BS transmits a CQI request to the MS group. The MSs of the MS group transmit the CQI to the BS. The BS receives the CQI from the MS group and allocates a channel according to the CQI.
摘要翻译：在包括用于向多个MS提供通信服务的多个移动站（MS）和基站（BS）的通信系统中提供了用于分配信道的方法和系统。 BS向MS发送平均信道质量信息（CQI）请求。 MS响应于来自BS的请求测量相对于它们的信道的CQI，从测量的CQI计算平均CQI，并将平均CQI发送到BS。 BS根据从MS接收到的平均CQI来选择预定数量的MS，并设置MS组。 BS向MS组发送CQI请求。 MS组的MS向BS发送CQI。 BS从MS组接收CQI，并根据CQI分配信道。

19. 发明申请

US20050282499A1 Velocity estimation apparatus in mobile communication environments 有权
标题翻译：移动通信环境中的速度估计装置
公开(公告)号：US20050282499A1
公开(公告)日：2005-12-22
申请号：US11143074
申请日：2005-06-02
申请人： Goo-Hyun Park , Dae-Sik Hong , Ye-Hoon Lee , Eung-Sun Kim , Myeon-Gyun Cho , Jong-Hyeuk Lee
发明人： Goo-Hyun Park , Dae-Sik Hong , Ye-Hoon Lee , Eung-Sun Kim , Myeon-Gyun Cho , Jong-Hyeuk Lee
IPC分类号： H04B7/26 , G01S11/10 , G01S13/08 , H04B17/00 , H04W64/00
CPC分类号： G01S11/10 , H04W64/006
摘要： Disclosed is a method for estimating the velocity of a mobile station in Rician fading environments in which a direct wave exists. Cellular mobile communication environments include two environments, Rician fading environments in which a direct wave exists and Rayleigh fading environments in which a direct wave does not exist. Generally, many methods for estimating the velocity of a mobile station have been known in Rayleigh fading environments. However, in Rician fading environments in which a direct wave exists, many errors occurs in estimating the velocity of a mobile station due to difficulty in estimation of a Rician coefficient K and an incident angle θ0. According to the invention, a method is provided wherein error is mostly eliminated in estimating the velocity of a mobile station by obtaining a maximum Doppler frequency of the mobile station, even without directly obtaining a Rician coefficient K and an incident angle θ0.
摘要翻译：公开了一种用于估计在存在直接波的Rician衰落环境中的移动台的速度的方法。蜂窝移动通信环境包括两个环境，其中存在直接波的Rician衰落环境和不存在直接波的瑞利衰落环境。通常，用于估计移动台的速度的许多方法在瑞利衰落环境中是已知的。然而，在存在直接波的Rician衰落环境中，由于难以估计Rician系数K和入射角θ0而在估计移动台的速度时出现许多错误。根据本发明，提供了一种方法，其中通过获得移动台的最大多普勒频率来估计移动台的速度大多消除了误差，即使没有直接获得Rician系数K和入射角θ0 。

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