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公开(公告)号：KR101390317B1
公开(公告)日：2014-05-02
申请号：KR1020070078131
申请日：2007-08-03
Applicant: 삼성전자주식회사 , 성균관대학교산학협력단
Abstract: 본발명은직교주파수분할다중화(Orthogonal Frequency Division Multiplexing : 이하 'OFDM'이라함) 시스템에서채널임펄스응답(Channel Impulse Response : 이하 'CIR'이라칭함)의추정오류를보상하기위한장치및 방법에관한것으로서, 초기채널을추정하는초기채널추정기와, 상기추정된초기채널값에 IFFT(Inverse Fast Fourier Transform) 연산을수행하여 CIR을추정하는 IFFT 연산기와, 상기추정된 CIR에대하여최대파워를갖는경로를검출하는최대파워경로검출부와, 상기검출된최대파워경로의 CIR 값과 CIR 추정오류함수를이용하여, 모든경로에대한 CIR 추정오류를보상하는 CIR 오류보상부를포함하여, 초기채널추정치에존재하는잡음의영향과보호대역설정에따른스펙트럼누수영향을효과적으로제거할수 있는이점이있다. 나아가보호대역설정에따른성능의열화를보완하여우수한채널추정성능을제공하므로수신기의성능향상을가져올수 있는이점이있다.
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公开(公告)号：KR1020090013957A
公开(公告)日：2009-02-06
申请号：KR1020070078131
申请日：2007-08-03
Applicant: 삼성전자주식회사 , 성균관대학교산학협력단
CPC classification number: H04L25/0212 , H04L25/0224 , H04L27/2614 , H04L27/2647
Abstract: An apparatus and a method for compensation of estimation error are provided to improve spectrum leakage and noises by compensating for estimation error of a channel impulse response before selecting a valid channel impulse response. A initial channel estimation machine(403) estimates a primary channel. By performing IFFT calculation in the presumed primary channel value, An IFFT(Inverse Fast Fourier Transform) operator(404) estimates CIR(Channel Impulse Response). A maximum power route detection part(420) detects route has the maximum power reserve about presumed CIR. A CIR error compensation part(430) uses the CIR value and the CIR estimation error function of the maximum power route in order to compensate for the CIR estimation error about all routes.
Abstract translation: 提供用于补偿估计误差的装置和方法，以在选择有效的信道脉冲响应之前补偿信道脉冲响应的估计误差来改善频谱泄漏和噪声。 初始信道估计机（403）估计主信道。 通过在推定的主信道值中进行IFFT计算，IFFT（快速傅里叶逆变换）运算符（404）估计CIR（信道脉冲响应）。 最大功率路由检测部分（420）检测到具有关于推定的CIR的最大功率储备。 CIR误差补偿部（430）使用CIR值和最大功率路由的CIR估计误差函数，以补偿关于所有路由的CIR估计误差。
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公开(公告)号：KR101415202B1
公开(公告)日：2014-08-07
申请号：KR1020070094507
申请日：2007-09-18
Applicant: 삼성전자주식회사
Abstract: 역 이산 푸리에 변환 방법에 있어서, 상기 방법은 제 1 신호가 2의 멱수인지 검사하는 과정과 상기 제 1 신호가 2의 멱수가 아닌 경우, 상기 제 1 신호룰 제 2 신호로 생성하는 과정과 상기 제 2 신호에 대해 역 고속 푸리에 변환을 수행하는 과정과 상기 역 고속 푸리에 변환한 신호의 각 샘플 간격 사이에 제 1 소정 갯 수의 보간 값을 구하여 보간을 수행하는 과정을 포함하고 상기 제 2 신호는 역 이산 푸리에 변환 수(N) 보다는 작지만 고속 푸리에 변환을 수행할 수 있는 2의 멱수인 것을 특징으로 한다.
고속 푸리에 변환, 이산 푸리에 변환, 보간, OFDM, SC-FDMA.-
公开(公告)号：KR1020090029345A
公开(公告)日：2009-03-23
申请号：KR1020070094507
申请日：2007-09-18
Applicant: 삼성전자주식회사
CPC classification number: G06F17/142 , H04L27/2636
Abstract: An apparatus and a method for a discrete fourier transform are provided to reduce complexity and operation quantity by using an interpolation and a fast fourier transform. In a signal of length m, whether or not m is exponent of 2 is confirmed. The signal of length m is generated as a signal of length M in case m is not exponential. M is exponent of 2. An IFFT(Inverse Fast Fourier Transform) is performed about the signal of length M(730). An interpolation is performed by calculating an interpolation value of a first fixed number in an interval between samples of an inverse fast fourier transformed signal(740). The first fixed number is N/M-1. The IFFT is performed about the signal of length m in case m is exponent of 2. An interpolation is performed by calculating an interpolation value of a second fixed number in an interval between samples of the inverse fast fourier transformed signal. The second fixed number is N/m-1.
Abstract translation: 提供了一种用于离散傅里叶变换的装置和方法，以通过使用插值和快速傅里叶变换来降低复杂度和操作量。 在长度为m的信号中，确认m是否为指数2。 在m不是指数的情况下，长度m的信号被生成为长度M的信号。 M是2的指数。关于长度M（730）的信号执行IFFT（快速傅里叶逆变换）。 通过计算逆快速傅里叶变换信号（740）的采样之间的间隔中的第一固定数的插值来执行内插。 第一个固定号码是N / M-1。 在m为2的指数的情况下，对长度为m的信号执行IFFT。通过在逆快速傅里叶变换信号的采样之间的间隔内计算第二固定数的内插值来进行插值。 第二个固定号码是N / m-1。
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公开(公告)号：KR1020090026436A
公开(公告)日：2009-03-13
申请号：KR1020070091402
申请日：2007-09-10
Applicant: 삼성전자주식회사
CPC classification number: H04L27/2614 , G06F17/141
Abstract: An apparatus and a method for arranging an index in a discrete fourier transformer are provided to perform an index arrangement regardless of an arrangement of a radix butterfly. A radix butterfly arrangement is set(302). A butterfly operation result is stored in a buffer(304). A fastest radix is selected in the radix butterfly arrangement(306). A base conversion of an index of an output signal stored in the buffer is performed(308). If a discrete fourier transform method is a DIF(Decimation-In-Frequency), a MSB(Most Significant Bit) digit is moved to (continuous number -1)-th position of a LSB(Least Significant Bit) digit(312). The MSB indicates a most left digit of a base-converted index. The LSB indicates a most right digit of the base-converted index.
Abstract translation: 提供了一种用于在离散傅立叶变换器中布置索引的装置和方法，以执行索引布置，而不管基数蝴蝶的布置。 设置基数蝴蝶布置（302）。 蝶形运算结果存储在缓冲器（304）中。 在基数蝶形布置（306）中选择最快的基数。 执行存储在缓冲器中的输出信号的索引的基本转换（308）。 如果离散傅里叶变换方法是DIF（抽取频率），则将MSB（最高有效位）数字移动到LSB（最低有效位）位（312）的（连续数-1）位置。 MSB指示基本转换索引的最左边数字。 LSB表示基本转换索引的最右边数字。
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Patent Agency Ranking
公开(公告)号：KR1020080016159A
公开(公告)日：2008-02-21
申请号：KR1020060077890
申请日：2006-08-17
Applicant: 삼성전자주식회사
IPC: H04B7/26
CPC classification number: H04J11/0069 , H04L5/0007 , H04L27/2613 , H04L27/2655 , H04L27/2675 , H04B7/2621
Abstract: A cell searching method in a communication system and a device are provided to transmit a cell number safely through the second synchronous channel after obtaining frame synchronization by the first synchronous channel by using an error correction code or repeatedly sending cell information, thereby variably controlling a time taken through the second synchronous channel according to channel situations. Slot timing and frame timing are detected by using the first synchronous channel. An ID of a cell to which a terminal belongs or a group ID of the cell is detected by using the second synchronous channel. The slot timing is detected from a synchronous code which constitutes the first synchronous channel. One code sequence is estimated among N code sequences according to the number of synchronous slots of the first predetermined synchronous channel, and the frame timing is detected from the estimated code.
Abstract translation: 提供通信系统和装置中的小区搜索方法，通过使用纠错码或重复发送小区信息，在获得第一同步信道的帧同步之后，通过第二同步信道安全地发送小区号，从而可变地控制时间 根据通道情况采取第二同步通道。 通过使用第一同步信道来检测时隙定时和帧定时。 通过使用第二同步信道来检测终端所属的小区的ID或小区的组ID。 从构成第一同步信道的同步码检测时隙定时。 根据第一预定同步信道的同步时隙数，在N个码序列中估计一个码序列，并根据估计码检测帧定时。
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公开(公告)号：KR1020080071853A
公开(公告)日：2008-08-05
申请号：KR1020070010270
申请日：2007-01-31
Applicant: 삼성전자주식회사
CPC classification number: H04L27/2647 , H04L25/0204 , H04L25/022 , H04L25/0232 , H04L27/2695
Abstract: An apparatus and a method for estimating a channel in an OFDM(Orthogonal Frequency Division Multiplexing) system are provided to improve performance by using a linear interpolation method in a high fading channel and using a IIR filtering method in a low facing channel. A reception apparatus of an OFDM system includes a pilot channel estimator(309), a channel compensator(311), and a decoder(313). The pilot channel estimator estimates a channel corresponding to a pilot of a received signal and estimates a data channel by performing a linear interpolation process and an IIR filtering process on the basis of a channel-estimated value of the pilot. A decoder decodes the compensated channel signal in order to obtain an original signal. The channel estimator includes a buffer for storing the received data, an LS estimator for performing an LS(Least Squares) estimation process for the data stored in the buffer, an FI(Frequency linear Interpolation) processor for processing a frequency linear interpolation process, and a IIR filtering processor for processing each sub-carrier in a IIR filtering manner.
Abstract translation: 提供了一种用于估计OFDM（正交频分复用）系统中的信道的装置和方法，以通过在高衰落信道中使用线性内插方法并且在低面向信道中使用IIR滤波方法来提高性能。 OFDM系统的接收装置包括导频信道估计器（309），信道补偿器（311）和解码器（313）。 导频信道估计器估计与接收信号的导频相对应的信道，并且基于导频的信道估计值执行线性内插处理和IIR滤波处理来估计数据信道。 解码器对补偿的信道信号进行解码，以获得原始信号。 信道估计器包括用于存储接收数据的缓冲器，用于对存储在缓冲器中的数据执行LS（最小二乘法）估计处理的LS估计器，用于处理频率线性插值处理的FI（频率线性插值）处理器，以及 用于以IIR滤波方式处理每个子载波的IIR滤波处理器。
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