会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 2. 发明申请
    • Method for transmitting/receiving data in mobile communication systems using an OFDMA scheme
    • 使用OFDMA方案在移动通信系统中发送/接收数据的方法
    • US20050281189A1
    • 2005-12-22
    • US11154763
    • 2005-06-16
    • Yong-Hwan LeeJune Moon
    • Yong-Hwan LeeJune Moon
    • H04B7/216H04J3/16H04J3/22H04J11/00H04L5/02H04L27/26H04Q7/00
    • H04L5/023H04L1/0003H04L1/1819H04L5/0044
    • A method for transmitting data in a mobile communication system using an OFDMA scheme. The method includes dividing an entire frequency band of the mobile communication system into a plurality of sub-carrier frequency bands, generating a plurality of segments each of the plurality of segments having a preset number of sub-frequency bands and a preset number of time intervals, and each of the plurality of segments having a frequency domain and a time domain, classifying the plurality of segments into multiple types of segments in consideration of data characteristics, determining combinations of signal transmitting and receiving schemes to be applied to each of the type of segments in consideration of the data characteristics, and selecting one of the multiple types of segments for transmitting data in consideration of the data characteristics when the data is generated for transmission.
    • 一种使用OFDMA方案在移动通信系统中发送数据的方法。 该方法包括将移动通信系统的整个频带划分成多个子载波频带,产生多个段,每个段具有预设数量的子频带和预设数量的时间间隔 ,并且所述多个段中的每一个具有频域和时域,考虑到数据特性将所述多个段分类为多种类型的段,确定要应用于所述类型的每个类型的信号发送和接收方案的组合 考虑到数据特性的段,并且当数据被生成用于传输时,考虑到数据特性来选择用于发送数据的多种类型的段之一。
    • 3. 发明授权
    • Method for transmitting/receiving data in mobile communication systems using an OFDMA scheme
    • 使用OFDMA方案在移动通信系统中发送/接收数据的方法
    • US07505397B2
    • 2009-03-17
    • US11154763
    • 2005-06-16
    • Yong-Hwan LeeJune Moon
    • Yong-Hwan LeeJune Moon
    • H04J11/00
    • H04L5/023H04L1/0003H04L1/1819H04L5/0044
    • A method for transmitting data in a mobile communication system using an OFDMA scheme. The method includes dividing an entire frequency band of the mobile communication system into a plurality of sub-carrier frequency bands, generating a plurality of segments each of the plurality of segments having a preset number of sub-frequency bands and a preset number of time intervals, and each of the plurality of segments having a frequency domain and a time domain, classifying the plurality of segments into multiple types of segments in consideration of data characteristics, determining combinations of signal transmitting and receiving schemes to be applied to each of the type of segments in consideration of the data characteristics, and selecting one of the multiple types of segments for transmitting data in consideration of the data characteristics when the data is generated for transmission.
    • 一种使用OFDMA方案在移动通信系统中发送数据的方法。 该方法包括将移动通信系统的整个频带划分成多个子载波频带,产生多个段,每个段具有预设数量的子频带和预设数量的时间间隔 ,并且所述多个段中的每一个具有频域和时域,考虑到数据特性将所述多个段分类为多种类型的段,确定要应用于所述类型的每个类型的信号发送和接收方案的组合 考虑到数据特性的段,并且当数据被生成用于传输时,考虑到数据特性来选择用于发送数据的多种类型的段之一。
    • 4. 发明申请
    • Interference Signal Avoiding Device of a Frequency Hopping Spread System and Method Thereof
    • 跳频传播系统的干扰信号避免装置及其方法
    • US20130251001A1
    • 2013-09-26
    • US13990745
    • 2011-12-01
    • Yong-Hwan LeeSeung-Hwan LeeJin-Seok Han
    • Yong-Hwan LeeSeung-Hwan LeeJin-Seok Han
    • H04B1/715
    • H04B1/715H04B2001/7154H04W28/18
    • An interference signal avoiding device of a frequency hopping spread system and a method thereof are disclosed. A method of transmitting/receiving an interference signal avoiding signal according to the present invention includes: determining a frequency hopping channel set and a parameter of an interference signal detector in consideration of characteristics of an interference signal; detecting whether there is an interference signal with respect to frequency hopping candidate channels that are to be used for the next frequency hopping by using the determined interference signal detector; transmitting a signal through a channel that is determined by the interference signal detector that there is no interference signal among the frequency hopping candidate channels; and searching a channel through which the signal is transmitted from the frequency hopping candidate channels in order to receive the transmitted signal.
    • 公开了一种跳频扩散系统的干扰信号避免装置及其方法。 根据本发明的发送/接收干扰信号避免信号的方法包括:考虑干扰信号的特性,确定跳频信道组和干扰信号检测器的参数; 通过使用所确定的干扰信号检测器检测是否存在关于要用于下一次跳频的跳频候选信道的干扰信号; 通过由所述干扰信号检测器确定的在所述跳频候选信道中不存在干扰信号的信道发送信号; 并且从跳频候选信道搜索发送信号的信道,以便接收所发送的信号。
    • 5. 发明申请
    • TRANSMISSION BEAMFORMING METHOD AND APPARATUS IN AN ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING-BASED MIMO WIRELESS SYSTEM
    • 基于频分多路复用的MIMO无线系统中的传输波束形成方法及装置
    • US20120321017A1
    • 2012-12-20
    • US13520794
    • 2011-01-07
    • Yong-Hwan LeeO-Jin KwonKeon-Wook Lee
    • Yong-Hwan LeeO-Jin KwonKeon-Wook Lee
    • H04B15/00
    • H04B7/0639H04B7/0641H04B7/0663H04L5/0023H04L25/0204H04L25/022H04L25/0224H04L25/03949
    • The present invention relates to a transmission beamforming method and apparatus in an orthogonal frequency division multiplexing (OFDM)-based MIMO wireless system. In particular, the present invention relates to a transmission beamforming method in an OFDM-based MIMO wireless system and an apparatus therefor, wherein the transmission beamforming method comprises: estimating a channel from a received pilot signal and obtaining time for the estimating channel and 2D channel correlation information of a frequency band; obtaining estimated channel information based on the channel correlation information; obtaining differential information that represents a difference between the current channel and the estimated channel and quantizing the differential information; and generating a transmission beam weight by using a predefined code book from the quantized differential information. The present invention may also provide a method and apparatus for reducing the channel quantization error and feedback load by employing the OFDM-based MIMO in a wireless communication system using a transmission beamforming scheme, wherein a receiver estimates current channel information by using time and 2D channel correlation information of a frequency based on the previous channel information, compares the estimated current channel information with an actual channel and then feeds back the differential channel information, i.e., the difference between the estimated channel and the actual channel, to a transmitter.
    • 本发明涉及一种基于正交频分复用(OFDM)的MIMO无线系统中的发射波束形成方法和装置。 具体地说,本发明涉及一种基于OFDM的MIMO无线系统中的发送波束形成方法及其装置,其中,所述发送波束形成方法包括:从接收的导频信号估计信道,并获得估计信道和2D信道的时间 频带的相关信息; 基于信道相关信息获取估计信道信息; 获取表示当前信道与估计信道之间的差分的差分信息并量化差分信息; 以及通过使用来自所述量化的差分信息的预定义码本来生成传输束权重。 本发明还可以提供一种通过在使用传输波束成形方案的无线通信系统中采用基于OFDM的MIMO来减少信道量化误差和反馈负载的方法和装置,其中接收机通过使用时间和2D信道来估计当前信道信息 基于先前信道信息的频率的相关信息,将估计的当前信道信息与实际信道进行比较,然后将差分信道信息(即估计信道与实际信道之间的差)反馈给发射机。
    • 6. 发明授权
    • Apparatus and method for cancellation of partially overlapped crosstalk signals
    • 用于消除部分重叠的串扰信号的装置和方法
    • US07640000B2
    • 2009-12-29
    • US11604898
    • 2006-11-28
    • Min-Ho CheongHyeong-Jun ParkYong-Hwan Lee
    • Min-Ho CheongHyeong-Jun ParkYong-Hwan Lee
    • H04B1/10H03D1/04
    • H04B1/0475
    • The present invention is related to a partially overlapped single-carrier crosstalk signal cancellation method and an apparatus using the same. For this purpose, the present invention provides a crosstalk canceller including a pre-processor for frequency down-shifting an input signal, a crosstalk signal cancellation module for canceling the crosstalk signal by dividing the input signal by an interpolation ratio, a post-processor for converting an output of the crosstalk signal cancellation modulation into a passband signal, and an error feedback processor for performing a decimation operation on a residual crosstalk signal and feeding backing the decimated residual crosstalk signal to the crosstalk signal cancellation module. In addition, the present invention provides a crosstalk signal cancellation method for performing interpolation and filtering operations by frequency down-shifting an input signal including a crosstalk signal to a baseband and decimating a residual crosstalk signal by frequency-shifting to an original signal frequency.
    • 本发明涉及部分重叠的单载波串扰信号消除方法及其使用方法。 为此目的,本发明提供了一种串扰消除器,包括用于降频输入信号的预处理器,用于通过将输入信号除以插值比来消除串扰信号的串扰信号消除模块,后处理器 将串扰信号消除调制的输出转换为通带信号,以及误差反馈处理器,用于对残留串扰信号执行抽取操作,并将抽取的残留串扰信号馈送到串扰信号消除模块。 此外,本发明提供了一种串扰信号消除方法,用于通过将包括串扰信号的输入信号降频到基带并通过频移到原始信号频率来抽取残留串扰信号来执行插值和滤波操作。
    • 10. 发明授权
    • System and method for transmitting/receiving data in a multicarrier communication system
    • 用于在多载波通信系统中发送/接收数据的系统和方法
    • US07835323B2
    • 2010-11-16
    • US11405827
    • 2006-04-18
    • Yong-Hwan LeeJae-Yun Ko
    • Yong-Hwan LeeJae-Yun Ko
    • H04W4/00
    • H04L27/2608H04J13/18H04L1/0006H04L1/0026H04W24/10H04W72/0413H04W72/085
    • A multicarrier communication system is provided that divides a full frequency band into a plurality of sub-carrier frequency bands, generates a plurality of segments having a frequency-time domain occupied by a predetermined number of sub-frequency bands and a predetermined number of time intervals, and classifies a plurality of segment types according to each of the segments, for data transmission. A mobile subscriber (MS) measures a channel state, extracts channel state information corresponding to the channel state, estimates a segment type using the extracted channel state information, and if there is a need for a change in the segment type, the MS transmits a segment type change request message to a base station (BS). Upon receiving a segment type change grant message from the BS, the MS receives data in a segment type corresponding to the received message.
    • 提供一种多载波通信系统,其将全频带划分成多个子载波频带,生成具有由预定数量的子频带占用的频率时间域和预定数量的时间间隔的多个段 并且根据每个段对多个段类型进行分类,以进行数据传输。 移动用户(MS)测量信道状态,提取与信道状态相对应的信道状态信息,使用所提取的信道状态信息来估计一个片段类型,并且如果需要片段类型的改变,则MS发送 段类型改变请求消息到基站(BS)。 在从BS接收到段类型改变授权消息时,MS以对应于接收到的消息的段类型接收数据。