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公开(公告)号：KR101002536B1
公开(公告)日：2010-12-17
申请号：KR1020080111815
申请日：2008-11-11
Applicant: 성균관대학교산학협력단
Abstract: 본 발명은 주기도표를 이용한 저복잡도의 OFDM 주파수 옵셋 추정 방법 및 장치에 관한 것이다.
본 발명은, 수신 신호로부터 주기도표 확장 기술을 이용해서 확장된 주기도표를 얻는 단계와,
확장된 주기도표를 이용해서 주파수 옵셋을 추정하는 단계 및,
추정된 주파수 옵셋을 보상하는 단계를 갖추어 이루어진 OFDM 주파수 옵셋 추정 방법으로,
상기 주파수 옵셋을 추정하는 단계에서,
(여기서, 이고, 는 q배 확장된 주기율표를 이용한 정수 주파수 옵셋의 새로운 추정치, 는 q배 확장된 주기율표를 이용한 정수 주파수 옵셋 추정을 위한 시험 값, (ㆍ)은 복소수의 허수 값, N은 전체 수신 신호 샘플의 수, q는 주기도표의 확장계수임)
에 의해 정수 주파수 옵셋 추정의 복잡도를 감소시키고,
(여기서, 는 q배 확장된 주기율표를 이용한 소수 주파수 옵셋의 새로운 추정치임)
에 의해 소수 주파수 옵셋 추정 가능 범위를 확장시킬 수 있도록 하는 것을 특징으로 한다.-
公开(公告)号：KR1020100055175A
公开(公告)日：2010-05-26
申请号：KR1020080114128
申请日：2008-11-17
Applicant: 성균관대학교산학협력단
IPC: H04B1/707
CPC classification number: H04B1/7075 , H04B2201/70715 , H04J14/007
Abstract: PURPOSE: A high speed code acquisition method in an optical code division multiple access system and a method thereof are provided to improve performance by realizing faster code acquisition through increasing template signal power by M(1+α)/2 (α
Abstract translation: 目的：提供一种光码分多址系统中的高速码采集方法及其方法，通过M（1 +α）/ 2（α<1）增加模板信号功率实现更快的码采集，提高性能。 构成：第一相关器（41）获得接收信号和第一模板信号之间的第一相关值。 在第一相关值大于第一阈值或第一相关值小于第一阈值且大于第二阈值的情况下，第二相关器获得接收信号和第二模板信号之间关于信元的第二相关值 的相关组的M / 2。 模板信号发生器和位置控制器（70）进行第一模板信号和第二模板信号的产生和延迟。
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公开(公告)号：KR1020100052919A
公开(公告)日：2010-05-20
申请号：KR1020080111815
申请日：2008-11-11
Applicant: 성균관대학교산학협력단
CPC classification number: H04L27/2657 , H04L27/2684
Abstract: PURPOSE: A method and an apparatus for estimating OFDM frequency offset of low complexity using a period diagram are provided to expand a frequency offset estimation range by using a frequency offset estimating method through a periodogram. CONSTITUTION: An expanded periodogram is obtained from a received signal through a frequency offset estimating method. A frequency offset is estimated through the expanded periodogram. A estimated frequency offset is compensated.
Abstract translation: 目的：提供一种使用周期图来估计低复杂度的OFDM频偏的方法和装置，以通过周期图使用频率偏移估计方法来扩展频偏估计范围。 构成：通过频率偏移估计方法从接收信号获得扩展的周期图。 通过扩展周期图来估计频率偏移。 估计频率补偿被补偿。
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Patent Agency Ranking4.发明公开첫번째 다중 경로 성분에서의 동기화를 통한 초광대역 무선 통신 수신기에서의 동기화 방법 및 이를 이용한 초광대역 무선 통신 수신기 无效通过同步超声波接收机中的多路分量的第一组件和使用其的超宽带接收机的同步方法
公开(公告)号：KR1020100009981A
公开(公告)日：2010-01-29
申请号：KR1020080070833
申请日：2008-07-21
Applicant: 성균관대학교산학협력단
IPC: H04L7/027
CPC classification number: H04B1/719 , H04B1/71637 , H04B1/7183
Abstract: PURPOSE: A method for synchronizing synchronization in an ultra wide band wireless communication receiver through the synchronization of a first multiple path component and an ultra wide band wireless communication receiver using the same are provided to improve the performance of the process after synchronization by performing the synchronization at a first multiple path component of a received signal. CONSTITUTION: A UWB reception signal transmitted through a multiple path is received through an antenna(S201). A multiplication circuit multiplies the UWB reception signal received through the antenna with a reference signal(S203). A correlator produces a correlation value between the UWB reception signal and the reference signal(S205). A synchronization state is determined at a first multiple path signal of the received signal according to a determination rule(S207). A verification unit verifies the synchronization(S209). The verification unit outputs the synchronized signal.
Abstract translation: 目的：提供一种通过第一多路径组件的同步和使用其的超宽带无线通信接收机来同步超宽带无线通信接收机中的同步的方法，以通过执行同步来改善同步之后的处理的性能 在接收信号的第一多路分量处。 构成：通过天线接收通过多路径发送的UWB接收信号（S201）。 乘法电路将通过天线接收的UWB接收信号与参考信号相乘（S203）。 相关器产生UWB接收信号和参考信号之间的相关值（S205）。 根据确定规则，在接收信号的第一多路径信号处确定同步状态（S207）。 验证单元验证同步（S209）。 验证单元输出同步信号。
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公开(公告)号：KR1020090131543A
公开(公告)日：2009-12-29
申请号：KR1020080057474
申请日：2008-06-18
Applicant: 성균관대학교산학협력단
IPC: H04J11/00
CPC classification number: H04L27/2695 , H04L25/0204
Abstract: PURPOSE: A method and an apparatus for estimating integer frequency offset are provided to estimate frequency offset without influence of a time error by using differential combination between successive correlation samples when the frequency offset is estimated at an OFDM system. CONSTITUTION: A fast fourier transform part(201) converts a time domain OFDM symbol into a frequency domain OFDM symbol. A correlation part(205) calculates a correlation sample between a training symbol generated from a training symbol generating part(204) and the frequency domain OFDM symbol delayed from a receiving symbol delay part(202). The correlation part applies differential combination between the successive correlation samples. An integer frequency offset estimating part(206) calculates integer frequency offset having a maximum value from correlation values delivered from the correlation part. A sample delay part of the receiving symbol delay part delays a receiving symbol delayed from the receiving symbol delay part as one sample in order to make the successive correlation samples. A sample delay part(207) of the training symbol generating part delays a training symbol generated from the training symbol generating part as one sample in order to make the successive correlation samples.
Abstract translation: 目的：提供一种用于估计整数频率偏移的方法和装置，以在OFDM系统估计频率偏移时，通过使用连续相关采样之间的差分组合来估计频偏，而不受时间误差的影响。 构成：快速傅立叶变换部分（201）将时域OFDM符号转换成频域OFDM符号。 相关部分（205）计算从训练符号生成部分（204）生成的训练符号与从接收符号延迟部分（202）延迟的频域OFDM符号之间的相关采样。 相关部分应用连续相关样本之间的差分组合。 整数频率偏移估计部（206）从相关部输出的相关值计算具有最大值的整数频率偏移。 接收符号延迟部分的采样延迟部分将从接收符号延迟部分延迟的接收符号延迟为一个样本，以便进行连续的相关采样。 训练符号生成部的采样延迟部（207）将从训练符号生成部生成的训练符号作为一个样本进行延迟，以进行连续的相关采样。
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公开(公告)号：KR1020100054987A
公开(公告)日：2010-05-26
申请号：KR1020080113863
申请日：2008-11-17
Applicant: 성균관대학교산학협력단
IPC: H04J11/00
CPC classification number: H04L27/2657 , H04L27/265 , H04L27/2695
Abstract: PURPOSE: An apparatus for frequency estimation at a OFDM system and a method thereof are provided to magnify frequency offset range by using a signal of period diagram in rayleigh fading channel environment. CONSTITUTION: An envelope curve regulating process of component generating unit(200) generates a component of envelop equality process. A integer frequency offset estimator(300) gets the fixed number frequency offset estimation value in which the sum between the consecutive period diagram makes have the maximum value. The prime number frequency offset estimator(400) gets the fraction frequency offset estimation value from the phase difference of the consecutive period diagram. The remainder frequency offset estimator(500) gets the frequency offset by using the fixed number frequency offset presumed and the period diagram corresponding to the fraction frequency offset.
Abstract translation: 目的：提供一种用于OFDM系统的频率估计的装置及其方法，用于通过使用在瑞利衰落信道环境中的周期图的信号来放大频率偏移范围。 构成：组件生成单元（200）的包络线调整过程生成包络相等处理的分量。 整数频率偏移估计器（300）获得固定数字频率偏移估计值，其中连续周期图之间的和具有最大值。 素数频率偏移估计器（400）根据连续周期图的相位差得到分数频率偏移估计值。 剩余频偏估计器（500）通过使用假定的固定数频率偏移和对应于分数频率偏移的周期图来获得频率偏移。
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公开(公告)号：KR100947432B1
公开(公告)日：2010-03-12
申请号：KR1020080115044
申请日：2008-11-19
Applicant: 성균관대학교산학협력단
CPC classification number: H04L1/203 , H04B2001/6912 , H04L27/18
Abstract: PURPOSE: A method of analysis for an efficiency of a css system using an overlap method is provided to use easily the induced BER(Bit Error Rate) formulation using two EDC(Exponentially Decreasing Cosine) formulations with short length instead of one EDC formulation with long length. CONSTITUTION: A CSS system models a transmission signal which is overlapped. The css system models the overlapped received signal which passed through a channel. The down-chirp filter output signal of the overlapped received signal is modeled in the CSS system. The CSS system induces the closed BER formulation.
Abstract translation: 目的：提供使用重叠方法对css系统的效率进行分析的方法，以便使用具有短长度的两个EDC（指数递减余弦）配方来简化引入的BER（误码率）配方，而不是具有长的EDC配方 长度。 构成：CSS系统对重叠的传输信号进行建模。 css系统模拟通过一个通道的重叠接收信号。 重叠接收信号的下啁啾滤波器输出信号在CSS系统中建模。 CSS系统引起封闭的BER公式。
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公开(公告)号：KR100994848B1
公开(公告)日：2010-11-16
申请号：KR1020080114128
申请日：2008-11-17
Applicant: 성균관대학교산학협력단
IPC: H04B1/707
Abstract: 본 발명은 광 부호 분할 다중 접속(code division multiple access: CDMA) 시스템에서의 고속 부호 획득(code acquisition) 방법 및 고속 부호 획득 장치에 관한 것으로, 특히 부호 획득 단계의 첫 단계에서 두 개의 문턱값을 사용함으로써 고속으로 부호 획득할 수 있도록 하는 광 CDMA 시스템에서의 고속 부호 획득 방법 및 그 장치에 관한 것이다.
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