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公开(公告)号：KR101056276B1
公开(公告)日：2011-08-11
申请号：KR1020090075985
申请日：2009-08-18
Applicant: 성균관대학교산학협력단
IPC: H04L27/26
Abstract: 본 발명은 협력 STBC-OFDM 시스템을 위한 반복적 ICI 제거 방법에 관한 것으로, 초기 추정 및 간섭 제거 전에 수신 신호 전력에 따른 우선권을 부여하고, 부여된 우선권에 따라 부반송파 단위로 상기 추정 및 반복적 간섭 제거 이후에 STBC 복호를 수행함으로서 낮은 복잡도의 연산 추가만으로도 효과적으로 수신기의 성능을 향상시킬 수 있도록 한 반복적 ICI 제거 방법에 관한 것이다.
Abstract translation: 由于本发明涉及一种重复ICI去除合作STBC-OFDM系统中，根据所述初始估计和干扰消除之前与接收的信号功率优先，其特征在于，根据所述优先级估计和重复干扰消除的副载波单元 本发明涉及通过执行STBC解码来添加低复杂度操作来有效地提高接收器的性能的重复ICI消除方法。
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公开(公告)号：KR1020110018494A
公开(公告)日：2011-02-24
申请号：KR1020090075985
申请日：2009-08-18
Applicant: 성균관대학교산학협력단
IPC: H04L27/26
CPC classification number: H04L27/2691
Abstract: PURPOSE: An ICI removal method for the cooperation STBC-OFDM system is provided to improve the accuracy of the initial guess by giving the priority of the interference removal step and initial guess. CONSTITUTION: The ICI removal algorithm previously decides the priority of the initial guess according to the electricity of the received signal and interference cancellation the initial guess with the subcarrier unit(764). According to the priority pitching as described above, the estimation(765) and interference cancellation(766) process of the transmission symbol are repetitively calculated as the subcarrier number.
Abstract translation: 目的：提供用于协作STBC-OFDM系统的ICI去除方法，通过给出干扰消除步骤和初始猜测的优先级来提高初始猜测的准确性。 构成：ICI删除算法先前根据接收信号的电量决定初始猜测的优先级，并用副载波单元（764）对干扰消除初始猜测。 根据如上所述的优先级俯仰，重复地计算发送符号的估计（765）和干扰消除（766）处理作为子载波号。
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53.发明授权다중입출력 안테나 직교주파수 분할 다중화 시스템의 셀간 간섭 완화를 위한 공간 공분산 행렬 추정 기법을 이용한 셀간 간섭 완화 방법 및 이를 이용한 셀간 간섭 완화 수신 장치 失效使用多输入和多输出天线OFDM系统的空间相似矩阵估计的内部干扰减轻方法和使用该接收装置的接收装置
公开(公告)号：KR100996535B1
公开(公告)日：2010-11-24
申请号：KR1020090040786
申请日：2009-05-11
Applicant: 성균관대학교산학협력단
CPC classification number: H04L25/022 , H04B7/0891 , H04L25/021 , H04L25/0228
Abstract: PURPOSE: An ICI(Inter-Cell Interference) relaxation method and an ICI relaxation reception apparatus using the same in a MIMO(Multiple Input Multiple Output antenna)-OFDM(Orthogonal Frequency Division Multiplexing) system without a complex decomposition method are provided to reduce the error of SCM estimation by a spectral leakage. CONSTITUTION: A channel estimation unit(1113) performs channel estimation by using an RS(Reference Symbol) signal. The channel estimation unit outputs a channel estimation result. An SCM estimation unit(1120) estimates the SCM by using a channel estimation result outputted from the channel estimation unit. A data symbol demodulating unit(1130) demodulates a data symbol by using the SCM estimated from the SCM estimation unit.
Abstract translation: 目的：提供在没有复杂分解方法的MIMO（多输入多输出天线）-OFDM（正交频分复用））系统中使用ICI（小区间干扰）松弛方法和ICI松弛接收装置，以减少 通过频谱泄漏的SCM估计误差。 构成：信道估计单元（1113）通过使用RS（参考符号）信号进行信道估计。 信道估计单元输出信道估计结果。 SCM估计单元（1120）通过使用从信道估计单元输出的信道估计结果来估计SCM。 数据符号解调单元（1130）通过使用从SCM估计单元估计的SCM来解调数据符号。
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公开(公告)号：KR1020100094218A
公开(公告)日：2010-08-26
申请号：KR1020090013541
申请日：2009-02-18
Applicant: 삼성전기주식회사 , 성균관대학교산학협력단
IPC: H04L27/26
CPC classification number: H04L27/2695 , H04L27/2614 , H04L27/2628 , H04L27/2675
Abstract: PURPOSE: A channel estimator of an OFDM system is provided to execute a channel estimation by using a weighting value based on an adaptive channel impulse response. CONSTITUTION: A channel estimator(100) obtains a channel frequency response value by using a received signal and a reference pilot signal. An interpolator(200) obtains a channel frequency response value in entire effective bands of a present symbol by interpolating the channel frequency response value. An IFFT(Inverse Fast Fourier Transform) part(300) changes the channel frequency response value of the interpolator into the channel frequency response value in the time domain through the IFFT transformation. A weighting value setting part(400) sets a weighting value according to the size of a pass power. A multiplicator(500) varies the channel impulse response value from the IFFT part. A FFT(Fast Fourier Transform) part(600) transforms the channel impulse response value from the multiplicator into the channel frequency response value in the frequency domain.
Abstract translation: 目的：提供OFDM系统的信道估计器，以通过使用基于自适应信道脉冲响应的加权值来执行信道估计。 构成：信道估计器（100）通过使用接收信号和参考导频信号来获得信道频率响应值。 内插器（200）通过内插通道频率响应值来获得当前符号的整个有效频带中的信道频率响应值。 IFFT（逆快速傅立叶变换）部分（300）通过IFFT变换将内插器的信道频率响应值改变为时域中的信道频率响应值。 加权值设定部（400）根据通过功率的大小设定加权值。 乘法器（500）改变来自IFFT部分的信道脉冲响应值。 FFT（快速傅立叶变换）部分（600）将来自乘法器的信道脉冲响应值转换为频域中的信道频率响应值。
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公开(公告)号：KR1020100072481A
公开(公告)日：2010-07-01
申请号：KR1020080130901
申请日：2008-12-22
Applicant: 삼성전기주식회사 , 성균관대학교산학협력단
CPC classification number: H04L25/0204 , H04L25/0242 , H04L25/03159 , H04L25/03821 , H04L27/2647 , H04L2025/0342 , H04L27/01 , H04L27/2695
Abstract: PURPOSE: An OFDM channel equalizer and a method thereof are provided to improve the dispersion capability by multiplying the number of occurrence. CONSTITUTION: A compensation value setting unit(100) sets the compensation value of the diagonal matrix form by using preset divergence limit value and extracted diagonal matrix from the channel matrix of an OFDM receiver. An initial estimation value calculation unit(200) calculates the initial estimation value by using signal and the compensation value processed FFT. An equalizer unit(300) obtains the interference induction value by using the compensation value, and the channel matrix and diagonal matrix. The equalizer unit obtains the interference cancellation compensation value by multiplying the equalization signal and the interference induction value which symbol is determined. The equalizer unit detects the transmission signal by subtracting the interference cancellation compensation value in the initial estimation value. A symbol decision unit(400) provides the proximal signal of the previous which symbol is determined the signals of equalizer to equalizer by deciding symbol toward the proximal signal of the transmission signal.
Abstract translation: 目的：提供OFDM信道均衡器及其方法，通过乘以发生次数来提高色散能力。 构成：补偿值设定单元（100）通过使用预设发散极限值和从OFDM接收机的信道矩阵提取的对角矩阵来设置对角矩阵形式的补偿值。 初始估计值计算单元（200）通过使用信号和经过FFT的补偿值来计算初始估计值。 均衡器单元（300）通过使用补偿值和信道矩阵和对角矩阵来获得干扰感应值。 均衡器单元通过将均衡信号和确定符号的干扰感应值相乘来获得干扰消除补偿值。 均衡器单元通过减去初始估计值中的干扰消除补偿值来检测发送信号。 符号决定单元（400）通过向发送信号的近端信号判定符号，提供前一个符号的近端信号，该符号被确定为均衡器的信号。
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Patent Agency Ranking
公开(公告)号：KR100964396B1
公开(公告)日：2010-06-17
申请号：KR1020080052491
申请日：2008-06-04
Applicant: 한국전자통신연구원 , 성균관대학교산학협력단
CPC classification number: H04J13/00 , H04L25/0206 , H04L25/0212 , H04L25/022 , H04L25/0228 , H04L25/03159 , H04L25/03292 , H04L27/2602 , H04L27/2607 , H04L27/2613 , H04L27/265 , H04L2025/03414
Abstract: 본 발명은 채널 추정, 등화 방법 및 시스템에 관한 것이다.
본 발명은 시간 영역의 파일럿 신호를 보호 구간에 삽입하고, 주파수 영역의 경판정 신호를 이용하여 채널의 주파수 응답을 추정한다. 그리고 추정된 채널 값을 통해 무선 채널 왜곡을 등화한다. 따라서, 고속 이동체 속도 환경에서의 성능 향상이 두드러지며, 시간영역 파일럿 신호를 이용한 채널 추정과 연동할 경우, 적은 반복 횟수로도 최대 성능을 발휘할 수 있다.
OFDM(Orthogonal Frequency Division Multiplexing), 채널 추정, 등화, 파일럿, 시퀀스, CAZAC(Constant Amplitude Zero Autocorrelation Code)-
公开(公告)号：KR1020100063940A
公开(公告)日：2010-06-14
申请号：KR1020080122324
申请日：2008-12-04
Applicant: 삼성전기주식회사 , 성균관대학교산학협력단
CPC classification number: H04L27/2657 , H04L27/2676 , H04L27/2688 , H04L25/0224 , H04L25/03006
Abstract: PURPOSE: A frequency synchronization apparatus and a method in an OFDM system are provided to estimate a frequency offset using a correlative value by an echo channel. CONSTITUTION: A correlating unit(100) obtains a first correlative value by correlating a standards guard section for applying to a standard protective section and the standard protective section which previously knows among a OFDM symbols. The correlating unit establishes from a predetermined spot among the standard protective section as an estimation protective section. The correlating unit obtains a second correlative value by correlating an estimation guard section applying to the estimation protective section. A deciding unit(200) decides a first case, a second case and a third case by comparing the first correlative value and the second correlative value. A frequency offset estimator(400) estimates the frequency offset using the correlative value in case of applying to among the first case to the second case decided to the deciding unit.
Abstract translation: 目的：提供OFDM系统中的频率同步装置和方法，以使用回波信道的相关值来估计频率偏移。 构成：相关单元（100）通过将用于应用于标准保护部分的标准防护部分与先前在OFDM符号中知道的标准保护部分相关联来获得第一相关值。 相关单元从标准保护部中的预定点建立为估计保护部。 相关单元通过将应用于估计保护部的估计保护部分相关联来获得第二相关值。 决定单元（200）通过比较第一相关值和第二相关值来判定第一情况，第二情况和第三情况。 频率偏移估计器（400）使用在第一种情况下应用的相关值来估计频率偏移，而对决定单元判定第二种情况。
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公开(公告)号：KR1020100037905A
公开(公告)日：2010-04-12
申请号：KR1020080097244
申请日：2008-10-02
Applicant: 삼성전기주식회사 , 성균관대학교산학협력단
IPC: H04J11/00
CPC classification number: H04L27/2675 , H04L25/0224 , H04L27/2691 , H04L27/2695
Abstract: PURPOSE: In OFDM(Orthogonal Frequency Division Multiplexing) receiver having the co-channel interference estimation and decoding performance improving function is the subcarrier location having interference, the stable performance of receiving % reception ability is guaranteed by accurately demodulating data. CONSTITUTION: A channel estimator(200) presumes the channel distortion by using the pilot symbol of the received signal. An equalizer(300) equalizes the channel distortion of the received signal by using the channel estimation value of the channel estimator. A P/S transform unit(400) changes the received signal which becomes equal as described above into the serial type. The co-channel interference estimating unit(500) obtains the distribution value toward the electricity of the received signal by using the channel estimation value. The location having the co-channel interference the co-channel interference estimating unit uses the distribution value is detected.
Abstract translation: 目的：具有同信道干扰估计和解码性能改善功能的OFDM（正交频分复用）接收机是具有干扰的子载波位置，通过准确解调数据来保证接收％接收能力的稳定性能。 构成：信道估计器（200）通过使用接收信号的导频符号来假设信道失真。 均衡器（300）通过使用信道估计器的信道估计值来均衡接收信号的信道失真。 P / S变换单元（400）将如上所述变得相等的接收信号改变为串行类型。 同信道干扰估计单元（500）通过使用信道估计值来获得接收信号的电力分布值。 检测具有同信道干扰估计单元的同信道干扰的位置使用分布值的位置。
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公开(公告)号：KR100943179B1
公开(公告)日：2010-02-19
申请号：KR1020080065596
申请日：2008-07-07
Applicant: 한국전자통신연구원 , 성균관대학교산학협력단
Abstract: 본 발명은 IOTA 함수 고유의 간섭을 제거할 수 있는 효과적인 채널 추정을 위한 파일럿 신호 구조와 그 구성 방법 및 데이터 송수신 방법에 관한 것이다.
본 발명은 주파수 및 시간 영역에서 파일럿 부반송파 주변의 인접 부반송파를 서로 상대적으로 배치하여 파일럿 부반송파에 주는 간섭의 양을 상쇄시킬 수 있다.-
公开(公告)号：KR1020100005521A
公开(公告)日：2010-01-15
申请号：KR1020080065596
申请日：2008-07-07
Applicant: 한국전자통신연구원 , 성균관대학교산학협력단
CPC classification number: H04L27/2695 , H04L27/262 , H04L27/36 , H04L27/3836
Abstract: PURPOSE: A method for transmitting and receiving data for OFDM/OQAM communication and a method for comprising a pilot are provided to transmit the data without the reducing a data transmission rate by arranging an adjacent subcarrier according to the data information bit. CONSTITUTION: A real number and an imaginary number of complex bit data separated with half-symbol interval are allocated to a data subcarrier. Binary phase shift modulated additional information data is allocated to the data subcarrier. The additional data subcarrier is outputted. A pilot subcarrier, an additional data subcarrier, and an interference cancellation subcarrier are inserted between the outputted data subcarriers. The additional data subcarrier is inserted adjacently to the pilot subcarrier. The interference cancellation subcarrier has the polarity opposite to the additional data subcarrier.
Abstract translation: 目的：提供用于OFDM / OQAM通信的发送和接收数据的方法以及包括导频的方法，用于通过根据数据信息比特布置相邻子载波来传输数据而不降低数据传输速率。 构成：分配有半符号间隔的实数和虚数的复数位数据被分配给数据副载波。 二进制相移调制附加信息数据被分配给数据子载波。 输出附加数据副载波。 在输出的数据子载波之间插入导频副载波，附加数据副载波和干扰消除子载波。 附加数据副载波相邻于导频子载波插入。 干扰消除子载波的极性与附加数据副载波相反。
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