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
    • 1. 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。
    • 2. 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。
    • 4. 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。
    • 6. 发明申请
    • Wireless communication method and apparatus using multiple antennas and multiple random beams
    • 使用多个天线和多个随机波束的无线通信方法和装置
    • US20050181833A1
    • 2005-08-18
    • US10836588
    • 2004-04-30
    • Yong-hwan LeeSung-su Hwang
    • Yong-hwan LeeSung-su Hwang
    • H01Q3/26H04B7/04H04B7/06H04Q7/20
    • H04B7/088H01Q3/26H04B7/0452H04B7/0617H04B7/0695
    • The object of the present invention is to provide a wireless communication method and apparatus, which obtains both Multi-User Diversity (MUD) and Multi-User Multiplexing (MUM) effects simultaneously using multiple beams having random weights. In the wireless communication method, a transmission stage having M antennas (M is an integer equal to or greater than 1) selects B reception stages (B is an integer equal to or greater than 1) among K reception stages (K is an integer equal to or greater than 1) each having N antennas (N is an integer equal to or greater than 1) and generates B beams to transmit B signals in a multiple-access transmission manner. In the wireless communication method, the weight vector wb=[w1,b, w2,b, . . . , wM,b] is determined to generate the b-th beam (b is an integer equal to or greater than 1 and equal to or less than B) corresponding to the b-th signal among B signals so as to determine the weight of output values respectively allocated to M antennas for the purpose of respectively generating B signals. The weight vector is determined so that respective elements thereof are determined to prevent interference between the different beams of B beams from exceeding a preset threshold. B signals are transmitted through B multiple channels obtained by generating B beams depending on the weights of elements.
    • 本发明的目的是提供一种使用具有随机权重的多个波束同时获得多用户分集(MUD)和多用户多路复用(MUM)效应的无线通信方法和装置。 在无线通信方法中,具有M个天线(M为1以上的整数)的发送级在K个接收级中选择B个接收级(B为1以上的整数)(K为整数相等 大于1),每个具有N个天线(N是等于或大于1的整数),并且以多址传输方式生成B个波束以发送B个信号。 在无线通信方法中,权重向量wb = [w1,b2,w2,b2]。 。 。 ,确定w B,以产生对应于B中的第b信号的第b个波束(b为等于或大于1且等于或小于B的整数) 信号,以确定分别分配给M个天线的输出值的权重,以分别产生B信号。 确定权重向量,使得其各个元素被确定为防止B束的不同波束之间的干扰超过预设阈值。 B信号根据元素的权重通过生成B波束获得的B多个信道发送。