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公开(公告)号：KR1020100088513A
公开(公告)日：2010-08-09
申请号：KR1020090052912
申请日：2009-06-15
Applicant: 한국전자통신연구원
CPC classification number: H04L27/265 , H04L25/0204 , H04L27/38
Abstract: PURPOSE: A multi-channel down-converter and a multi-channel down-converting method for generating a narrowband channel using fast Fourier transform are provided to reduce hardware complexity of the multi-channel down-converter or reduce an operation amount when realizing the multi-channel down-converter by a DSP(Digital Signal Processor). CONSTITUTION: A buffer(110) converts a broadband signal of a time domain into a data vector with a fixed length. A preprocessor(120) pre-processes the data vector saved in the buffer. An FFT(Fast Fourier Transform) processing unit(130) converts the pre-processed data vector into frequency domain data. A baseband processor(140) adds a frequency value in which a narrowband channel exists in the frequency domain data and converts the added value into a baseband.
Abstract translation: 目的：提供一种用于使用快速傅立叶变换产生窄带信道的多通道下变频器和多通道下变频方法，以降低多通道下变频器的硬件复杂度，或者在实现多通道下变频器时减少操作量 通道DSP（数字信号处理器）的通道下变频器。 构成：缓冲器（110）将时域的宽带信号转换成具有固定长度的数据向量。 预处理器（120）预处理保存在缓冲器中的数据向量。 FFT（快速傅里叶变换）处理单元将预处理的数据向量转换为频域数据。 基带处理器（140）将在频域数据中存在窄带信道的频率值相加，并将该相加值转换为基带。
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公开(公告)号：KR1020110069662A
公开(公告)日：2011-06-23
申请号：KR1020100010831
申请日：2010-02-05
Applicant: 한국전자통신연구원
IPC: H04L27/26
CPC classification number: H04L27/2662 , H04L27/0012
Abstract: PURPOSE: A symbol estimation apparatus using a second order differential phase vector and a method thereof are provided to compensate frequency offset automatically, by performing second order differential of phase components of input data. CONSTITUTION: Input data is received(410). Phase components of the input data are drawn(420). A real part and an imaginary part of the input data are obtained. A second order differential vector is generated by differentiating a first order differential phase vector(430). The first order differential phase vector is drawn using smoothing window. A modulation method of the input data is judged using the dispersion of the second order differential phase vector(440). Symbols corresponding to the input data are estimated(450).
Abstract translation: 目的：提供使用二阶微分相位矢量的符号估计装置及其方法，通过执行输入数据的相位分量的二阶微分来自动补偿频偏。 构成：接收输入数据（410）。 绘制输入数据的相位分量（420）。 获得输入数据的实部和虚部。 通过微分一阶微分相位矢量（430）来生成二阶微分矢量。 使用平滑窗口绘制一阶微分相位矢量。 使用二阶微分相位矢量（440）的色散判断输入数据的调制方式。 估计对应于输入数据的符号（450）。
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Patent Agency Ranking
公开(公告)号：KR100822705B1
公开(公告)日：2008-04-17
申请号：KR1020060110692
申请日：2006-11-09
Applicant: 한국전자통신연구원
CPC classification number: H01Q21/20 , G01S11/023 , H01Q1/38 , H01Q1/48 , H01Q21/14
Abstract: A direction-finding antenna using a phase comparison method is provided to operate five antenna elements more stably by providing a common reference ground plane to five antenna elements through an installation of a simple ground plate. A direction-finding antenna using a phase comparison method includes antenna arrays(101-105), transmission units(106,107) and a metal grounding part(108). The antenna array has a plurality of antenna elements which are vertically arranged on a circumference having a predetermined radius. The transmission units are connected to the antenna arrays and transmit an antenna signal. The metal grounding part grounds the antenna arrays. The direction-finding antenna has a multi-layer structure having the same central axis. The antenna elements are alternatively arranged to have a different angle from antenna elements of a different direction-finding antenna.
Abstract translation: 提供了一种使用相位比较方法的测向天线，通过简单的接地板的安装，通过向五个天线元件提供共同的参考接地平面，更稳定地操作五个天线元件。 使用相位比较方法的测向天线包括天线阵列（101-105），传输单元（106,107）和金属接地部分（108）。 天线阵列具有垂直布置在具有预定半径的圆周上的多个天线元件。 传输单元连接到天线阵列并发射天线信号。 金属接地部分将天线阵列接地。 测向天线具有具有相同中心轴的多层结构。 天线元件交替地布置成与不同的测向天线的天线元件具有不同的角度。
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公开(公告)号：KR101675963B1
公开(公告)日：2016-11-15
申请号：KR1020120098777
申请日：2012-09-06
Applicant: 한국전자통신연구원
CPC classification number: H04L27/38 , H04L27/0012 , H04L27/10 , H04L27/18
Abstract: 본발명은신호에대한정보를알 수없는상태에서목적신호에대한변조방식을자동분류하는알고리즘의실용적인설계에관한것이다. 통상, 정보를알 수없는신호에대하여종래의대부분의자동분류알고리즘은사전에신호와관련한정보를일정수준알고있다는가정하에알고리즘을제시하여적대적통신등 실환경상태의신호에대해적용하기어렵고, 대상신호를제한하는것이일반적이다. 또한, 전송주파수복원없이는자동변조방식분류알고리즘설계가어려운상황이다. 본발명에서는대상신호의효율적인정보획득을위하여입력신호의위상차이를활용해 PSK(single carrier), FSK(variant carrier) 계열로분류한후 자기상관함수(Auto Correlation Function)의특성을이용하여복잡한계산없이대상신호의변조지수 M(Modulation index)을결정하는기법을제안하고자한다.
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公开(公告)号：KR1020150049423A
公开(公告)日：2015-05-08
申请号：KR1020130129991
申请日：2013-10-30
Applicant: 한국전자통신연구원
IPC: H04L25/02
CPC classification number: H04L25/03261 , H03H2017/0081
Abstract: 본발명은, 통신시스템에서유한임펄스응답필터구현방법에있어서, 유한임펄스응답필터를구현하기위한필터파라미터들을설정하는단계; 상기설정된필터파라미터들에근거하여입력데이터에미리설정된배수의제로패딩을하고, 윈도우함수를연산하는단계; 상기연산된윈도우함수에근거하여고속퓨리에변환을수행하는단계; 및신호의특성에따라적응하는데이터의중첩개수와미리설정된개수의채널합을설정하여상기고속퓨리에변환을이용한유한임펄스응답필터를구현하는단계를포함하고, 상기필터파라미터를설계하는단계는필터파라미터들중에서채널샘플링율을채널대역폭의두 배로설정하는단계를포함하는것을특징으로한다.
Abstract translation: 本发明涉及一种在通信系统中设计有限脉冲响应滤波器的方法，该方法包括设置滤波器参数以确保有限脉冲响应滤波器的步骤; 基于预定的滤波器参数对输入数据执行预定倍数的零填补来计算窗函数的步骤; 基于所计算的窗口函数执行高速傅里叶变换的步骤; 以及根据信号的特性设定预定数量的信道总和和重叠数据的步骤，并通过使用高速傅里叶变换来确保有限脉冲响应滤波器。 设计滤波器参数的步骤包括允许滤波器参数中的信道采样率为两倍带宽信道的步骤。
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公开(公告)号：KR1020140032190A
公开(公告)日：2014-03-14
申请号：KR1020120098777
申请日：2012-09-06
Applicant: 한국전자통신연구원
CPC classification number: H04L27/38 , H04L27/0012 , H04L27/10 , H04L27/18 , H04L27/00 , H04L27/0008 , H04L27/02 , H04L27/04 , H04L2025/03394 , H04L2025/03401
Abstract: The present invention relates to a practical design of an algorithm in which modulation schemes are automatically classified for a target signal in the state that the information of the target signal cannot be known. In general, most conventional automatic classification algorithms may be not applied to signals under actual environment states such as hostile communication and restrict a target signal because the algorithms are suggested under the assumption that information of the signal is previously known to some extent. In addition, the automatic modulation scheme classifying algorithm may be not designed without recovering a propagation frequency. The present invent suggests a scheme of determining a modulation index (M) of the target signal without complex computations by using the characteristic of an auto correlation function after classifying the signal into a PSK (single carrier) class signal and an FSK (variant carrier) class signal by utilizing a phase difference of an input signal in order to effectively acquire the information of the target signal. [Reference numerals] (AA) unknown signal; (BB) PSK class; (CC) FSK class
Abstract translation: 本发明涉及一种算法的实际设计，其中在目标信号的信息不能被知道的状态下，调制方案被自动分类为目标信号。 通常，大多数传统的自动分类算法可能不适用于诸如敌对通信之类的实际环境状态下的信号，并且限制目标信号，因为在某种程度上先前已知该信号的信息的假设下建议算法。 此外，自动调制方式分类算法可以不设计而不恢复传播频率。 本发明提出了一种在将信号分类为PSK（单载波）等级信号和FSK（变型载波）之后，通过使用自相关函数的特性来确定目标信号的调制指数（M）而不进行复杂计算的方案， 通过利用输入信号的相位差来实现等级信号，以有效地获取目标信号的信息。 （标号）（AA）未知信号; （BB）PSK类; （CC）FSK类
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公开(公告)号：KR101145097B1
公开(公告)日：2012-05-14
申请号：KR1020090052912
申请日：2009-06-15
Applicant: 한국전자통신연구원
Abstract: 본 발명은 다중 채널 하향 변환기 및 다중 채널 하향 변환 방법에 관한 것으로, 구체적으로는 단 한번의 FFT(Fast Fourier Transform) 연산으로 필터링을 대체하여 복수 개의 협대역 채널을 생성함으로써 수반되는 하드웨어의 복잡도를 현저하게 줄일 수 있다.
FFT, 다중 채널 하향 변환기, 광대역, 협대역, 다중 채널 분석 시스템
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