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公开(公告)号：KR100450849B1
公开(公告)日：2004-10-01
申请号：KR1020020052764
申请日：2002-09-03
IPC: H04B1/711
CPC classification number: H04B1/71055 , H04B1/7115 , H04B7/04 , H04B7/0854 , H04L2025/03605
Abstract: An adaptive interference suppression receiver for a DS/CDMA system includes: input signal generators outputting a part of received signals of receiver antennas that has a coding block's transfer code; adaptive filter blocks filtering a complex signal output from the input signal generators with a tap weight updated based on a constraint MMSE criterion and estimating phase and amplitude components of a specific user channel using the filtering output signal to generate a channel-estimated signal; a signal restorer combining the channel-estimated signal and the filtering output signal and restoring an original signal; a signal selector for selecting known training data signal or the restored signal; and error generators comparing the channel-estimated signal and the filtering output signal and calculating an error between the two signals.
Abstract translation: 用于DS / CDMA系统的自适应干扰抑制接收机包括：输入信号发生器，输出接收天线的接收信号的一部分，其具有编码块的传送码; 自适应滤波器块利用基于约束MMSE准则更新的抽头权重对从输入信号生成器输出的复信号进行滤波，并且使用滤波输出信号来估计特定用户信道的相位和振幅分量以生成信道估计信号; 信号恢复器，将信道估计信号和滤波输出信号组合并恢复原始信号; 信号选择器，用于选择已知的训练数据信号或恢复的信号; 以及误差生成器，将信道估计信号与滤波输出信号进行比较并计算两个信号之间的误差。
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公开(公告)号：KR100415550B1
公开(公告)日：2004-01-24
申请号：KR1020010061537
申请日：2001-10-05
Applicant: 한국전자통신연구원
IPC: H04B1/7103
CPC classification number: H04B1/71075
Abstract: An interference cancellation receiver reduces the multiple access interference in a CDMA system. The receiver includes a demodulator for receiving a residual signal or a received signal from a calling terminal as an over-sample unit baseband spread signal and down-sampling the baseband spread signal on a chip basis to output a demodulation signal, a regenerator for performing a bit decision for the demodulation signal, regenerating signals through the channelization and scrambling and converting the regenerated signals to signals on the over-sample basis, an adder for summing up the over-sample unit signals, a filter for filtering the summed-up signal to output a band spread signal, a subtractor for subtracting the band spread signal from the received signal to output the residual signal and a delay for keeping timing with the residual signal by delaying the chip unit signals outputted from the regenerator.
Abstract translation: 干扰消除接收机减少了CDMA系统中的多址干扰。 接收机包括：解调器，用于接收来自呼叫终端的残留信号或接收信号作为过采样单位基带扩展信号，并基于码片对基带扩展信号进行下采样以输出解调信号;再生器，用于执行 通过信道化和加扰重新生成信号，并将重新生成的信号转换成过采样信号;加法器，用于求和过采样单元信号;滤波器，用于将求和信号滤波为 输出频带扩展信号;减法器，用于从接收信号中减去频带扩展信号以输出剩余信号;延迟器，用于通过延迟从再生器输出的芯片单元信号来保持与剩余信号的定时。
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公开(公告)号：KR1020020039782A
公开(公告)日：2002-05-30
申请号：KR1020000069593
申请日：2000-11-22
Applicant: 한국전자통신연구원
IPC: H04B1/7117 , H04B1/7103
CPC classification number: H04B1/7107
Abstract: PURPOSE: An apparatus and a method for canceling a group-wise parallel interference of a CDMA system with a multiple transmission speed are provided to cancel a group-wise parallel interference by determining ranks of signals using output values of a maximal ratio combiner received to each finger and power measured values of the fingers, and by grouping the fingers according to the ranks. CONSTITUTION: A received intermediate frequency signal(100) is generated through a receiver antenna, a carrier frequency demodulator and an analog to digital converter. The received signal(100) is converted into a baseband signal(107). After that, the baseband signal(107) is stored in a buffer(102). The signal(107) is inputted to an adder(106). A DCB(Despreading and Channel estimation Block) is composed of a timing circuit(108), a PN code generator(109), a demodulator(111) and a channel and power estimator(112). The synchronization acquisition circuit(108) performs a processing of PN code acquisition and tracking using the signal(107). The PN code generator(109) generates a PN code(110) using synchronization acquisition information outputted from the circuit(108).
Abstract translation: 目的：提供一种用于消除具有多个传输速度的CDMA系统的分组并行干扰的装置和方法，以通过使用接收到每个信道的最大比组合器的输出值确定信号等级来消除群组并行干扰 手指和功率测量值的手指，并根据等级对手指进行分组。 构成：通过接收机天线，载波频率解调器和模数转换器产生接收到的中频信号（100）。 接收信号（100）被转换成基带信号（107）。 之后，将基带信号（107）存储在缓冲器（102）中。 信号（107）被输入到加法器（106）。 DCB（解扩和信道估计块）由定时电路（108），PN码发生器（109），解调器（111）和信道和功率估计器（112）组成。 同步采集电路（108）使用信号（107）执行PN码采集和跟踪处理。 PN码发生器（109）使用从电路（108）输出的同步获取信息产生PN码（110）。
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公开(公告)号：KR101726864B1
公开(公告)日：2017-04-13
申请号：KR1020100103654
申请日：2010-10-22
Applicant: 한국전자통신연구원
Inventor： 최인경
CPC classification number: H04B7/0452 , H04B7/0639 , H04L25/0202 , H04W72/044
Abstract: 다중채널을이용하는무선랜시스템에서 MU-MIMO 방법, MU-MIMO를위한액세스포인트및 스테이션에관한기술이개시된다. 이러한기술에따르면, 적어도하나이상의스테이션을포함하며다중채널을이용하는무선랜시스템에서, 액세스포인트의 MU-MIMO 방법에있어서, 상기다중채널각각에대해, 상기스테이션에의해선택된빔에대한프리코딩벡터를나타내는인덱스정보및 채널품질정보를상기스테이션으로부터수신하는단계; 상기채널품질정보를이용하여, 상기다중채널중 기설정된채널대역폭에따른채널조합그룹의제1채널용량정보를생성하는단계; 및상기제1채널용량정보에따라상기채널조합그룹중 선택된채널조합에서, 상기인덱스정보및 상기채널품질정보를이용하여, 상기스테이션에자원을할당하는단계를포함하며, 상기액세스포인트및 상기스테이션은상기 MU-MIMO를위한복수의빔에대한프리코딩벡터정보를기 저장하고있는 MU-MIMO 방법이개시된다.
Abstract translation: 公开了涉及多信道无线LAN系统中的MU-MIMO方法，MU-MIMO的接入点和站的技术。 根据该技术，在包括至少一个站并且使用多个信道的WLAN系统中的接入点的MIMO-MIMO方法中，对于多个信道中的每一个，针对由该站选择的波束的预编码向量 从站接收索引信息和信道质量信息; 使用所述信道质量信息，根据所述多个信道的预定信道带宽生成信道组合组的第一信道容量信息; 并根据所述第一信道容量信息，利用所述信道组合组之间的选定信道组合中的索引信息和信道质量信息为所述站点分配资源， 公开了用于存储用于MU-MIMO的多个波束的预编码矢量信息的MU-MIMO方法。
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公开(公告)号：KR100959645B1
公开(公告)日：2010-05-26
申请号：KR1020070130387
申请日：2007-12-13
CPC classification number: H04B7/0413 , H04B7/0465 , H04L25/03343 , H04L2025/0342 , H04L2025/03426
Abstract: 본 발명은 본 발명은 다중사용자 다중입출력 채널에서 송수신 방법으로, 채널 행렬의 허미션 전치 행렬을 QR 분해하여 제1 행렬과 삼각 행렬인 제2 행렬을 구하고, 상기 제1 행렬을 이용하여 전처리 행렬을 구하고, 상기 전처리 행렬을 블록 삼각화 기법으로 이용하여 유효 채널을 형성한다.
삼각화 기법, ML 수신기, 유효 채널, BTHP-
Patent Agency Ranking
公开(公告)号：KR1020090065165A
公开(公告)日：2009-06-22
申请号：KR1020070132624
申请日：2007-12-17
CPC classification number: H04B7/0617 , H04B7/0632 , H04B7/0639 , H04W16/28 , H04B1/76
Abstract: A beam forming method is provided to design a beam according to a degree of correlation of a channel, thereby optimizing performance of a random beam forming method including a COBF(Codebook-based Opportunistic Beamforming) method and a CBF-CR(Codebook-based Beamforming with Code Rotation) method. A base station designs a beam(S110). The base station determines an optimized beam among Q beams(S120). The base station pre-codes data by multiplying the optimized beam to data to transmit(S130). The base station transmits the data through transmitting antennas by inserting a pilot to the pre-coded data(S140).
Abstract translation: 提供了一种波束形成方法，以根据信道的相关程度来设计波束，从而优化包括COBF（基于码本的机会波束形成）方法和CBF-CR（基于码本的波束形成）的随机波束形成方法的性能 与代码旋转）方法。 基站设计光束（S110）。 基站确定Q波束中的优化波束（S120）。 基站通过将优化的波束与要发送的数据相乘来对数据进行预编码（S130）。 基站通过将导频插入到预编码数据中，通过发送天线发送数据（S140）。
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公开(公告)号：KR1020090028170A
公开(公告)日：2009-03-18
申请号：KR1020070093542
申请日：2007-09-14
CPC classification number: H04B7/0617 , H04B7/0417 , H04B7/0632
Abstract: A multiple beam forming method for gaining the multi-user diversity gain and an apparatus thereof are provided to increase multi user diversity gain by using one matrix and utilize space freedom by multi antenna by using multi beam every time slot. A user terminal grouping unit groups user terminals by using feedback information received from each user terminal(S240). A base station scheduler uses the feedback information of the user terminal and the coding word. The user terminal in which the base station scheduler assigns each stream is determined(S250). The COMBF precoder of the base station uses the determined coding word and the unitary matrix promised between transmitter and receiver(S260). A multiplexer multiplexes the outputs of the COMBF precoder. The multiplexer inserts the MIMO midamble and the electrical transmission is performed through a plurality of transmission antenna(S270).
Abstract translation: 提供了用于获得多用户分集增益的多波束形成方法及其装置，以通过使用一个矩阵来增加多用户分集增益，并且通过每时隙使用多个波束来利用多天线的空间自由度。 用户终端分组单元通过使用从每个用户终端接收到的反馈信息来分组用户终端（S240）。 基站调度器使用用户终端和编码字的反馈信息。 确定基站调度器分配每个流的用户终端（S250）。 基站的COMBF预编码器使用所确定的编码字和发射机和接收机之间承诺的酉矩阵（S260）。 复用器复用COMBF预编码器的输出。 多路复用器插入MIMO中间码，并且通过多个发射天线执行电传输（S270）。
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公开(公告)号：KR1020080030433A
公开(公告)日：2008-04-04
申请号：KR1020060119829
申请日：2006-11-30
CPC classification number: H04W52/42 , H04B7/0452 , H04B7/0465 , H04W52/243 , H04L27/3483 , Y02D70/00
Abstract: A preprocessing device in a multi-user MIMO(Multiple Input Multiple Output) communication system and a preprocessing method are provided to select a constellation rotational angle based on interference signals between users on a transmission end, thereby minimizing transmission power as improving performance even without deteriorating a structural gain of an existing multi-user MIMO preprocessing device. An interference signal substantial channel generator(140) extracts an interference signal to be applied to a transmission signal of the first user. A rotational angle selector(110) selects a rotational angle for rotating constellation of the transmission signal to be transmitted by the first user, by using the extracted interference signal and rotational angle number information. A modulo operator(120) controls transmission power by removing the interference signal from the transmission signal of the first user. A matrix multiplier(130) multiplies a Hermitian matrix by the transmission signal of the first user to generate a communication channel for sending the transmission signal of the first user to a receiving end(200) as the selected rotational angle.
Abstract translation: 提供多用户MIMO（多输入多输出）通信系统和预处理方法中的预处理装置，用于基于传输端的用户之间的干扰信号来选择星座旋转角度，由此尽可能降低传输功率，即使不降低性能也能提高性能 现有的多用户MIMO预处理装置的结构增益。 干扰信号实质信道发生器（140）提取要施加到第一用户的传输信号的干扰信号。 旋转角度选择器（110）通过使用提取的干涉信号和旋转角度数信息来选择用于旋转要由第一用户发送的发送信号的星座的旋转角度。 模运算器（120）通过从第一用户的发送信号中去除干扰信号来控制发送功率。 矩阵乘法器（130）将Hermitian矩阵乘以第一用户的发送信号，以生成用于将第一用户的发送信号发送到接收端（200）的通信信道作为所选择的旋转角度。
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公开(公告)号：KR100760998B1
公开(公告)日：2007-09-21
申请号：KR1020060095650
申请日：2006-09-29
Applicant: 한국전자통신연구원 , 연세대학교 산학협력단
CPC classification number: H04B7/0658 , H04B7/0634 , H04B7/0639
Abstract: A method and an apparatus for optimizing a codebook for a quantized precoder by using a steepest descent algorithm are provided to minimize the maximum correlation of the codebook by optimizing the codebook through the steepest descent algorithm, thereby improving the bit error performance of the codebook. A method for optimizing a codebook comprises the following steps of: selecting a codebook to optimize(S610); changing each code word into code words of which the correlation is minimized between the code words by applying a steepest descent algorithm to the each code word of the selected codebook(S620); determining whether codebook including the changed code words is optimized(S640); and storing the codebook when it is determined that the codebook is optimized(S650).
Abstract translation: 提供一种通过使用最陡下降算法来优化量化预编码器的码本的方法和装置，以通过最速下降算法优化码本来最小化码本的最大相关性，从而提高码本的位错误性能。 一种用于优化码本的方法包括以下步骤：选择要优化的码本（S610）; 通过对所选码本的每个码字应用最陡下降算法，将每个码字变换成代码字之间相关最小化的码字（S620）; 确定包括改变的代码字的码本是否被优化（S640）; 以及当确定码本被优化时存储码本（S650）。
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公开(公告)号：KR100706634B1
公开(公告)日：2007-04-11
申请号：KR1020040092587
申请日：2004-11-12
CPC classification number: H04B7/061 , H04B7/0669 , H04B7/0691 , H04B7/08 , H04L1/0003 , H04L1/0637 , H04L1/0675
Abstract: 본 발명은 성능이 향상된 다중 안테나 시스템에 관한 것으로, 그 시스템은 시공간부호화 기법과 송신 안테나 선택 기법을 동시에 사용하는 시스템으로, 송신 장치 및 수신 장치를 포함한다. 송신 장치는 공간 채널로의 신호 전송에 사용되는 안테나의 수(M, M은 자연수)보다 많은 수(N, N은 M보다 큰 자연수)의 송신 안테나를 구비하고, 전송할 심볼을 시공간부호화 처리하여 상기 N개의 송신 안테나 중에서 특정의 상기 M개의 송신 안테나를 선택하여 공간 채널로 전송한다. 수신 장치는 공간 채널로부터의 신호 수신에 사용되는 M개의 수신 안테나를 구비하고, 상기 수신 안테나를 통해 수신된 신호를 사용하여 정보 심볼을 검출하는 동시에, 상기 수신된 신호로부터 추정된 채널 결과에 기초하여 상기 송신 장치의 N개의 송신 안테나 중에서 상기 M개의 송신 안테나를 선택하도록 하는 송신 안테나 선택 정보를 생성하여 상기 송신 장치로 귀환시켜 전달한다. 본 발명에 따르면, 시공간부호화기의 다이버시티 이득을 최적화하는 동시에 신호대 잡음비 이득을 크게 하여 시공간부호화기의 비트오차확률을 크게 개선시킬 수 있다.
다중 안테나 시스템, MIMO, 시공간부호화 기법, 송신 안테나 선택 기법
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