专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US07382718B2 Transmitting and receiving method for reducing distortion caused by a time-varying channel in an orthogonal frequency division multiplex system 有权
标题翻译：用于减少由正交频分复用系统中的时变信道引起的失真的发送和接收方法
公开(公告)号：US07382718B2
公开(公告)日：2008-06-03
申请号：US10334354
申请日：2002-12-31
申请人： Kyung-Hi Chang , Yun-Hee Kim , Yong-Soo Cho , Kyung-Won Park
发明人： Kyung-Hi Chang , Yun-Hee Kim , Yong-Soo Cho , Kyung-Won Park
IPC分类号： H04L5/04 , H04L27/00 , H04J11/00 , G06F15/00
CPC分类号： H04W52/16 , H04L1/0618 , H04L25/0204 , H04L27/2647 , H04W52/42
摘要： Disclosed is a transmitting and receiving method for reducing a time-varying channel distortion in an orthogonal frequency division multiplex (OFDM) system. In the present invention, the transmitter defines M sub-channels in one data group, mathematically analyzes a change of channel for each path causing a time-varying channel distortion in a high-speed mobile environment by approximation, calculates a weight value based on the mathematical analysis and assigns the calculated weight value to transmit data of each sub-channel. Subsequently, the receiver combines the signals of these M sub-channels and demodulates the combined signals. Accordingly, the present invention greatly reduces a distortion caused by the time-varying channel to improve a bit error rate and a channel estimation performance.
摘要翻译：公开了一种用于减少正交频分复用（OFDM）系统中的时变信道失真的发送和接收方法。在本发明中，发射机在一个数据组中定义M个子信道，通过近似来数学地分析导致高速移动环境中的时变信道失真的每个路径的信道变化，基于数学分析，并分配计算的权重值以发送每个子频道的数据。随后，接收机组合这些M个子信道的信号并解调组合的信号。因此，本发明大大减少了由时变信道引起的失真，以提高误码率和信道估计性能。

2. 发明授权

US07542504B2 Frequency hopping ofdma method using symbols of comb pattern 失效
标题翻译：使用梳状图案符号进行跳频
公开(公告)号：US07542504B2
公开(公告)日：2009-06-02
申请号：US10532734
申请日：2002-11-26
申请人： Kyung-Hi Chang , Kwang-Soon Kim , Yong-Soo Cho , Suk-Won Ha
发明人： Kyung-Hi Chang , Kwang-Soon Kim , Yong-Soo Cho , Suk-Won Ha
IPC分类号： H04B1/00 , H04B1/66
CPC分类号： H04L5/0044 , H04B1/713 , H04B1/7136 , H04B1/7143 , H04B2001/71367 , H04B2001/7154 , H04L1/0025 , H04L5/0007 , H04L5/0048 , H04L25/0226 , H04L27/2613 , H04L27/2628 , H04L27/2657
摘要： Method for providing frequency-hopping OFDMA using symbols of comb patter, the method including the steps of: a) assigning frequency domain signal X(k) of comb pattern (comb symbol, k is frequency index) to modulated data sequence, the comb symbol comprising predetermined number of sub carriers (sub carrier group) which are placed with predetermined interval in the whole available frequency band; b) getting the comb symbol hopped for the comb symbol to have independent frequency offset; and c) inverse fast fourier transforming the comb symbol to time domain signal x(n) (n is time index) and transmitting the signal.
摘要翻译：一种用于使用梳状图案符号提供跳频OFDMA的方法，所述方法包括以下步骤：a）将梳状模式（梳状符号，k为频率索引）的频域信号X（k）分配给调制数据序列，梳状符号包括在整个可用频带中以预定间隔放置的预定数量的子载波（子载波组）; b）使梳状符号跳转的梳状符号具有独立的频率偏移; 和c）将梳状符号逆向快速傅立叶变换成时域信号x（n）（n是时间索引）并发送信号。

3. 发明申请

US20060072649A1 Frequency hopping ofdma method using symbols of comb pattern 失效
公开(公告)号：US20060072649A1
公开(公告)日：2006-04-06
申请号：US10532734
申请日：2002-11-26
申请人： Kyung-Hi Chang , Kwang-Soon Kim , Yong-Soo Cho , Suk-Won Ha
发明人： Kyung-Hi Chang , Kwang-Soon Kim , Yong-Soo Cho , Suk-Won Ha
IPC分类号： H04B1/713 , H04K1/10
CPC分类号： H04L5/0044 , H04B1/713 , H04B1/7136 , H04B1/7143 , H04B2001/71367 , H04B2001/7154 , H04L1/0025 , H04L5/0007 , H04L5/0048 , H04L25/0226 , H04L27/2613 , H04L27/2628 , H04L27/2657
摘要： Method for providing frequency-hopping OFDMA using symbols of comb patter, the method including the steps of: a) assigning frequency domain signal X(k) of comb pattern (comb symbol, k is frequency index) to modulated data sequence, the comb symbol comprising predetermined number of sub carriers (sub carrier group) which are placed with predetermined interval in the whole available frequency band; b) getting the comb symbol hopped for the comb symbol to have independent frequency offset; and c) inverse fast fourier transforming the comb symbol to time domain signal x(n) (n is time index) and transmitting the signal.

4. 发明授权

US07430193B2 Method and apparatus for embodying and synchronizing downlink signal in mobile communication system and method for searching cell using the same 有权
标题翻译：用于在移动通信系统中实现和同步下行链路信号的方法和装置及使用其的小区搜索方法
公开(公告)号：US07430193B2
公开(公告)日：2008-09-30
申请号：US10536593
申请日：2002-11-29
申请人： Kwang-Soon Kim , Kyung-Hi Chang , Yong-Soo Cho , Tae-Gon Kim
发明人： Kwang-Soon Kim , Kyung-Hi Chang , Yong-Soo Cho , Tae-Gon Kim
IPC分类号： H04B7/00 , H04B7/216 , H04B7/212 , H04Q7/00 , H04Q7/24 , H04J3/00 , H04J1/00 , H04J3/06
CPC分类号： H04L27/2656 , H04L5/0023 , H04L5/0048 , H04L5/0053 , H04L27/2613 , H04L27/2657 , H04L27/2662 , H04L27/2678
摘要： In an OFDMA-based cellular system, a frame of a downlink signal includes a common slot and traffic slots. The common slot includes a synchronization preamble and a cell search preamble. The synchronization preamble has a structure for synchronizing time and frequency, and the cell search preamble has a cell search structure. The traffic slot includes pilot symbols provided on the time and frequency axes. A cyclic prefix is used to estimate initial symbol synchronization, and the initial symbol synchronization and the synchronization preamble are used to synchronize the frame. The synchronization frame and the cell search preamble are used to estimate time and frequency synchronization. The cell search preamble is used to search cells. When the initial synchronization is performed, the cyclic prefix is used to track the frequency, the synchronization preamble is used to track symbol synchronization, and the cell search preamble is used to track fine frequency synchronization.
摘要翻译：在基于OFDMA的蜂窝系统中，下行链路信号的帧包括公共时隙和业务时隙。公共时隙包括同步前导码和小区搜索前同步码。同步前导码具有用于同步时间和频率的结构，并且小区搜索前导码具有小区搜索结构。业务插槽包括在时间轴和频率轴上提供的导频符号。使用循环前缀来估计初始符号同步，并且使用初始符号同步和同步前导码来同步该帧。同步帧和小区搜索前导码用于估计时间和频率同步。小区搜索前导码用于搜索小区。当执行初始同步时，使用循环前缀来跟踪频率，同步前同步码用于跟踪符号同步，并且使用小区搜索前导码来跟踪精细频率同步。

5. 发明申请

US20060114812A1 Method and apparatus for embodying and synchronizing downlink signal in mobile communication system and method for searching cell using the same 有权
标题翻译：用于在移动通信系统中实现和同步下行链路信号的方法和装置及使用其的小区搜索方法
公开(公告)号：US20060114812A1
公开(公告)日：2006-06-01
申请号：US10536593
申请日：2002-11-29
申请人： Kwang-Soon Kim , Kyung-Hi Chang , Yong-Soo Cho , Tae-Gon Kim
发明人： Kwang-Soon Kim , Kyung-Hi Chang , Yong-Soo Cho , Tae-Gon Kim
IPC分类号： H04J11/00
CPC分类号： H04L27/2656 , H04L5/0023 , H04L5/0048 , H04L5/0053 , H04L27/2613 , H04L27/2657 , H04L27/2662 , H04L27/2678
摘要： In an OFDMA-based cellular system, a frame of a downlink signal includes a common slot and traffic slots. The common slot includes a synchronization preamble and a cell search preamble. The synchronization preamble has a structure for synchronizing time and frequency, and the cell search preamble has a cell search structure. The traffic slot includes pilot symbols provided on the time and frequency axes. A cyclic prefix is used to estimate initial symbol synchronization, and the initial symbol synchronization and the synchronization preamble are used to synchronize the frame. The synchronization frame and the cell search preamble are used to estimate time and frequency synchronization. The cell search preamble is used to search cells. When the initial synchronization is performed, the cyclic prefix is used to track the frequency, the synchronization preamble is used to track symbol synchronization, and the cell search preamble is used to track fine frequency synchronization.
摘要翻译：在基于OFDMA的蜂窝系统中，下行链路信号的帧包括公共时隙和业务时隙。公共时隙包括同步前导码和小区搜索前同步码。同步前导码具有用于同步时间和频率的结构，并且小区搜索前导码具有小区搜索结构。业务插槽包括在时间轴和频率轴上提供的导频符号。使用循环前缀来估计初始符号同步，并且使用初始符号同步和同步前导码来同步该帧。同步帧和小区搜索前导码用于估计时间和频率同步。小区搜索前导码用于搜索小区。当执行初始同步时，使用循环前缀来跟踪频率，同步前同步码用于跟踪符号同步，并且使用小区搜索前导码来跟踪精细频率同步。

6. 发明授权

US07848218B2 Virtual multi-antenna method for OFDM system and OFDM-based cellular system 失效
标题翻译：用于OFDM系统和基于OFDM的蜂窝系统的虚拟多天线方法
公开(公告)号：US07848218B2
公开(公告)日：2010-12-07
申请号：US12064206
申请日：2006-08-18
申请人： Hyo-Jin Lee , Jae-Young Ahn , Yong-Soo Cho , Kyu-Jin Lee , Kyung-Won Park
发明人： Hyo-Jin Lee , Jae-Young Ahn , Yong-Soo Cho , Kyu-Jin Lee , Kyung-Won Park
IPC分类号： H04J11/00
CPC分类号： H04B7/068 , H04L25/03159 , H04L25/03343 , H04L27/2602 , H04L2025/03414 , H04L2025/03522 , H04L2025/03605
摘要： Provided are a virtual multi-antenna method for an orthogonal frequency division multiplexing (OFDM) system and an OFDM-based cellular system. The virtual multi-antenna method includes grouping sub-carriers in a frequency domain of an OFDM symbol and generating at least one group including G sub-carriers; and regarding the G sub-carriers included in the at least one group as multiple channels used in a multi-antenna technique and virtually applying the multi-antenna technique to the transmission and reception of the OFDM symbol. The virtual multi-antenna method can effectively reduce an interference signal and obtain the effects of a spatial division multiple access (SDMA) technique without physically using multiple antennas.
摘要翻译：提供了一种用于正交频分复用（OFDM）系统和基于OFDM的蜂窝系统的虚拟多天线方法。虚拟多天线方法包括在OFDM符号的频域中分组子载波并且生成包括G个子载波的至少一个组; 并且将包括在至少一个组中的G个子载波作为在多天线技术中使用的多个信道，并将多天线技术虚拟地应用于OFDM符号的发送和接收。虚拟多天线方法可以有效地减少干扰信号并获得空分多址（SDMA）技术的效果，而无需物理上使用多个天线。

7. 发明授权

US08432986B2 Apparatus and method for receiving signals in multiple-input multiple-output wireless communication system 有权
标题翻译：用于在多输入多输出无线通信系统中接收信号的装置和方法
公开(公告)号：US08432986B2
公开(公告)日：2013-04-30
申请号：US12004112
申请日：2007-12-20
申请人： Joo-Hyun Lee , Sang-Boh Yun , Yong-Soo Cho , Jae-Kwon Kim , Tae-Ho Im
发明人： Joo-Hyun Lee , Sang-Boh Yun , Yong-Soo Cho , Jae-Kwon Kim , Tae-Ho Im
IPC分类号： H04B7/02
CPC分类号： H04L25/03171 , H04B7/0854 , H04L25/067 , H04L27/38 , H04L2025/03426
摘要： An apparatus and method for receiving signals in a multiple-input, multiple-output (MIMO) wireless communication system is provided. A receiving end using as many as N Receive (Rx) antennas includes a first detector, as many as (N−2) nth detectors, and an Nth detector. A signal detection technique of the present invention has a low complexity and a throughput similar to that of a Maximum Likelihood (ML) scheme in a Multiple-Input Multiple-Output (MIMO) wireless communication system using a Spatial Multiplexing (SM) scheme.
摘要翻译：提供了一种用于在多输入多输出（MIMO）无线通信系统中接收信号的装置和方法。使用多达N个接收（Rx）天线的接收端包括第一检测器，多达（N-2）个第n个检测器和第N个检测器。本发明的信号检测技术具有与使用空间复用（SM）方案的多输入多输出（MIMO）无线通信系统中的最大似然（ML）方案相似的低复杂度和吞吐量。

8. 发明申请

US20110084278A1 THIN FILM TRANSISTOR AND METHOD FOR FABRICATING THE SAME 有权
标题翻译：薄膜晶体管及其制造方法
公开(公告)号：US20110084278A1
公开(公告)日：2011-04-14
申请号：US12576591
申请日：2009-10-09
申请人： Yong-Soo Cho , Kyo-Ho Moon , Hoon Choi
发明人： Yong-Soo Cho , Kyo-Ho Moon , Hoon Choi
IPC分类号： H01L33/00 , H01L21/336
CPC分类号： H01L29/4908 , H01L27/1214 , H01L29/78648
摘要： The present invention relates to a thin-film transistor in a liquid crystal display device and a method of fabricating the same, and the thin-film transistor may be configured by including a first gate electrode formed on an insulating substrate; a first gate insulation film formed on the insulating substrate including the first gate electrode; an active layer formed on the first gate insulation film; source/drain electrodes formed on the active layer and arranged at both sides of the first gate electrode; a second gate insulation film formed on the active layer and the first gate insulation film including the source/drain electrodes and provided with a contact hole for exposing part of the drain electrode; a second gate electrode overlapped with the first gate electrode on the second gate insulation film; and a pixel electrode electrically connected to the drain electrode through the contact hole.
摘要翻译：液晶显示装置中的薄膜晶体管及其制造方法技术领域本发明涉及液晶显示装置中的薄膜晶体管及其制造方法，薄膜晶体管可以通过包括形成在绝缘基板上的第一栅电极构成，形成在包括所述第一栅极的所述绝缘基板上的第一栅极绝缘膜; 形成在第一栅极绝缘膜上的有源层; 源极/漏电极，形成在有源层上，并布置在第一栅电极的两侧; 形成在所述有源层上的第二栅极绝缘膜和包括所述源极/漏极的所述第一栅极绝缘膜，并且设置有用于使所述漏极的一部分露出的接触孔; 在所述第二栅极绝缘膜上与所述第一栅电极重叠的第二栅电极; 以及通过接触孔与漏电极电连接的像素电极。

9. 发明申请

US20080152032A1 Apparatus and method for receiving signals in multiple-input multiple-output wireless communication system 有权
标题翻译：用于在多输入多输出无线通信系统中接收信号的装置和方法
公开(公告)号：US20080152032A1
公开(公告)日：2008-06-26
申请号：US12004112
申请日：2007-12-20
申请人： Joo-Hyun Lee , Sang-Boh Yun , Yong-Soo Cho , Jae-Kwon Kim , Tae-Ho Im
发明人： Joo-Hyun Lee , Sang-Boh Yun , Yong-Soo Cho , Jae-Kwon Kim , Tae-Ho Im
IPC分类号： H04L27/28
CPC分类号： H04L25/03171 , H04B7/0854 , H04L25/067 , H04L27/38 , H04L2025/03426
摘要： An apparatus and method for receiving signals in a multiple-input, multiple-output (MIMO) wireless communication system is provided. A receiving end using as many as N Receive (Rx) antennas includes a first detector, as many as (N-2) nth detectors, and an Nth detector. A signal detection technique of the present invention has a low complexity and a throughput similar to that of a Maximum Likelihood (ML) scheme in a Multiple-Input Multiple-Output (MIMO) wireless communication system using a Spatial Multiplexing (SM) scheme.
摘要翻译：提供了一种用于在多输入多输出（MIMO）无线通信系统中接收信号的装置和方法。使用多达N个接收（Rx）天线的接收端包括第一检测器，多达（N-2）个第n个检测器和第N个检测器。本发明的信号检测技术具有与使用空间复用（SM）方案的多输入多输出（MIMO）无线通信系统中的最大似然（ML）方案相似的低复杂度和吞吐量。

10. 发明授权

US08660563B2 Preamble design method for reducing overhead during handover in hierarchical cellular system 有权
标题翻译：用于在分层蜂窝系统中减少切换期间的开销的前导码设计方法
公开(公告)号：US08660563B2
公开(公告)日：2014-02-25
申请号：US12316727
申请日：2008-12-16
申请人： Joo-Hyun Lee , Jin-Ghoo Choi , Sang-Boh Yun , Jong-Ho Lee , Yong-Soo Cho , Jae-Kwon Kim , Yeong-Jun Kim , Kyung-Soo Woo , Hyun-Il Yoo
发明人： Joo-Hyun Lee , Jin-Ghoo Choi , Sang-Boh Yun , Jong-Ho Lee , Yong-Soo Cho , Jae-Kwon Kim , Yeong-Jun Kim , Kyung-Soo Woo , Hyun-Il Yoo
IPC分类号： H04W36/04
CPC分类号： H04W36/30 , H04B7/2606 , H04W16/26
摘要： Provided is a handover method of a wireless communication system using a hierarchical cellular scheme. In the method, signal quality of a serving node is measured, so that whether to start scanning for a handover is determined. When the scanning for the handover starts, signal qualities of a serving cell including the serving node and one or more neighbor cells are measured through a first preamble including a first identifier for distinguishing a cell. An intra-cell handover or an inter-cell handover is selected using the signal qualities of the serving cell and the neighbor cells. Therefore, a terminal can easily distinguish between the inter-cell handover and the intra-cell handover, and an overhead during a handover can be reduced because an intra-cell handover procedure is simplified.
摘要翻译：提供了使用分层蜂窝方案的无线通信系统的切换方法。在该方法中，测量服务节点的信号质量，从而确定是否开始扫描切换。当切换的扫描开始时，包括服务节点和一个或多个相邻小区的服务小区的信号质量通过包括用于区分小区的第一标识符的第一前同步码进行测量。使用服务小区和相邻小区的信号质量来选择小区内切换或小区间切换。因此，终端可以容易地区分小区间切换和小区内切换，并且可以减少切换期间的开销，因为小区内切换过程被简化。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式