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公开(公告)号：KR100843252B1
公开(公告)日：2008-07-03
申请号：KR1020070037629
申请日：2007-04-17
Applicant: 한국전자통신연구원
IPC: H04B1/7097
Abstract: 본 발명은 이동통신시스템에서의 반복 수신 방법 및 반복 수신기에 관한 것이다.
본 발명은 다중 셀 환경에서 반복 수신되는 수신 신호에서 셀 간 간섭을 제거하기 위하여, 자기 셀을 제외한 다른 셀의 경성 판정치를 이용한다. 또한, 채널 추정의 부정확성 등으로 인해 발생할 수 있는 자기 셀 내의 다른 사용자의 간섭을 제거하기 위하여 자기 셀 신호의 경성 판정치를 이용한다. 또한, 경성 판정치를 이용한 간섭제거를 수행하는 반복 수신기의 수신 성능을 향상시키기 위하여 반복 수신되는 신호에 대해 자기 셀 신호의 경성 판정치를 이용하여 반복적으로 채널 추정을 수행하여 채널 추정치를 갱신한다.
MC-CDMA, 다중반송파, 경성 판정, 간섭, 반복 수신Abstract translation: 本发明涉及移动通信系统中的迭代接收方法和迭代接收机。
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公开(公告)号：KR1020080053129A
公开(公告)日：2008-06-12
申请号：KR1020060125133
申请日：2006-12-08
Applicant: 한국전자통신연구원
CPC classification number: H04B17/327 , H04B7/0413 , H04B17/336 , H04L1/0071
Abstract: A method for determining the validity of received data in a wireless communication channel and an apparatus therefor are provided to calculate the power of a noise signal using a sufficiently long PN(Pseudo Noise) code and determine the validity of measured data automatically on the basis of the calculated power, thereby processing the data measured in a fast broadband wireless communication channel measuring system quickly and efficiently. A method for determining the validity of received data in a wireless communication channel comprises the following steps of: acquiring the maximum power of the received data on the basis of correlation of data received in the wireless communication channel(401); determining a section where there is only a noise signal except the received data on a checked PDP(Power Delay Profile) according to the correlation(402); acquiring the representative power of the noise signal on the basis of the power values of the determined section(404); and determining that the data is valid data when a difference between the maximum power of the received data and the representative power of the noise signal is greater than a set reference value(406,408).
Abstract translation: 提供了一种用于确定无线通信信道中的接收数据的有效性的方法及其装置，用于使用足够长的PN（伪噪声）码来计算噪声信号的功率，并基于以下方式自动确定测量数据的有效性： 计算功率，从而快速有效地处理在快速宽带无线通信测量系统中测量的数据。 一种用于确定无线通信信道中的接收数据的有效性的方法包括以下步骤：基于在无线通信信道（401）中接收的数据的相关性来获取接收数据的最大功率; 根据所述相关性（402），确定除已检查的PDP（功率延迟曲线）上的接收数据之外仅存在噪声信号的部分; 基于所确定的部分（404）的功率值获取噪声信号的代表功率; 并且当所述接收数据的最大功率与所述噪声信号的代表功率之间的差异大于设定的参考值时，确定所述数据是有效数据（406,408）。
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公开(公告)号：KR1020080052323A
公开(公告)日：2008-06-11
申请号：KR1020070095440
申请日：2007-09-19
Applicant: 한국전자통신연구원 , 재단법인서울대학교산학협력재단
CPC classification number: H04L27/261 , H04B7/2621 , H04L27/2626
Abstract: An apparatus and a method for controlling a transmission of an uplink sounding signal in an OFDMA/FDD communication system are provided to improve a data transmission rate and a proportional fairness of a proportional fair scheduler by transmitting a sounding signal to terminals based on the proportional fairness. An apparatus for controlling a transmission of an uplink sounding signal in an OFDMA/FDD communication system includes a data sub-band number determination unit(410), and a sounding sub-band number determination unit(420). The data sub-band determination unit determines the number of data sub-bands to be used in a transmission of a data signal through an uplink frame based on a channel gain of each of terminals. The sounding sub-band determination unit determines the number of sounding sub-bands to be used in a sounding signal transmission through the uplink frame in proportion to the number of sub-bands to be used in terminals.
Abstract translation: 提供了一种用于控制OFDMA / FDD通信系统中的上行链路探测信号的传输的装置和方法，以通过基于比例公平性向终端发送探测信号来提高比例公平调度器的数据传输速率和比例公平性 。 一种用于在OFDMA / FDD通信系统中控制上行探测信号的传输的装置包括数据子带号确定单元（410）和探测子带号确定单元（420）。 数据子带确定单元基于每个终端的信道增益来确定通过上行链路帧在数据信号的传输中要使用的数据子带的数量。 探测子波段确定单元与终端中要使用的子带的数量成比例地确定通过上行链路帧的探测信号传输中使用的探测子带的数量。
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公开(公告)号：KR1020080052214A
公开(公告)日：2008-06-11
申请号：KR1020070052598
申请日：2007-05-30
Applicant: 한국전자통신연구원
CPC classification number: H04L1/0048 , H04B7/0854 , H04L1/005 , H04L1/06
Abstract: An iterative receiver and a method for detecting transmitted signal thereof are provided to increase the receiving performance of signals transmitted from a transmitter. An iterative receiver(100) includes an antenna array(110), a signal detector(120), a decoder(130), a soft decision unit(140), a channel estimator(150), a covariance estimator(160), and a hard decision unit(170). The antenna array includes plural receiving antennas, and receives a signal from a transmitter and transmits the signal to the signal detector. The signal detector cancels an interference signal from the received signal and suppresses the residual interference signal through an MMSE(Minimum Mean Squared Error) filter to detect and output a signal corresponding to a plurality of transmitted signals. The decoder calculates an LLR(Log-Likelihood Ratio) by using the output signal of the signal detector, performs a channel decoding process by using the calculated LLR, and outputs a resultant signal. The soft decision unit performs a soft decision process on plural transmitted signals by using the channel decoded signal output by the decoder. The channel estimator estimates the channel, through which the transmitted signals have passed, by using the transmitted signals from the soft decision unit and a received signal. The covariance estimator estimates the covariance on the summed signal of interference and noise by using the transmitted signals from the soft decision unit, channel information from the channel estimator, and the received signal. The hard decision unit determines a plurality of transmitted signals by using the signal output by the decoder after the signal detector, the decoder, the soft decision unit, the channel estimator, and the covariance estimator are iterated a predetermined number of times.
Abstract translation: 提供了一种用于检测其发送信号的迭代接收机和方法，以增加从发射机发射的信号的接收性能。 迭代接收机（100）包括天线阵列（110），信号检测器（120），解码器（130），软判决单元（140），信道估计器（150），协方差估计器（160） 硬决策单元（170）。 天线阵列包括多个接收天线，并且从发射机接收信号，并将该信号发送到信号检测器。 信号检测器从接收信号中消除干扰信号，并通过MMSE（最小均方误差）滤波器抑制残留干扰信号，以检测和输出与多个发送信号相对应的信号。 解码器通过使用信号检测器的输出信号来计算LLR（对数似然比），通过使用计算的LLR执行信道解码处理，并输出结果信号。 软判决单元通过使用解码器输出的信道解码信号对多个发送信号进行软判定处理。 信道估计器通过使用来自软判决单元的发送信号和接收信号来估计传输信号已经通过的信道。 协方差估计器通过使用来自软判决单元的发送信号，来自信道估计器的信道信息和接收信号来估计干扰和噪声的求和信号的协方差。 硬判决单元在信号检测器，解码器，软判决单元，信道估计器和协方差估计器被迭代预定次数之后，通过使用由解码器输出的信号来确定多个发送信号。
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公开(公告)号：KR1020080052133A
公开(公告)日：2008-06-11
申请号：KR1020070018976
申请日：2007-02-26
Applicant: 한국전자통신연구원
CPC classification number: H04L27/2614 , H04L5/0007 , H04L25/0204 , H04L25/0224 , H04L25/0226 , H04L27/2602 , H04L27/2607 , H04L27/2613 , H04L5/0048 , H04L5/0032 , H04L27/2675
Abstract: An apparatus and a method for transmitting/receiving a pilot signal of a wireless communication system are provided to support at least two channels in an SC-FDMA system simultaneously by maintaining frequency resolution of a frequency area. An apparatus for transmitting a pilot signal of a wireless communication system comprises a digital Fourier transformer(213), a pilot signal generator(220), a time division multiplexer(218), and a symbol and sub-carrier mapping unit(214). The digital Fourier transformer performs a digital Fourier transform for a data signal. The pilot signal generator generates a pilot signal shifted for a predetermined interval in a frequency area. The time division multiplexer performs time division multiplexing for the pilot signal and the transformed data signal and transmits the time division multiplexed signal through an antenna. The symbol and sub-carrier mapping unit determines a sub-carrier transmitting the pilot signal and the data signal and maps the data signal to the determined sub-carrier.
Abstract translation: 提供用于发送/接收无线通信系统的导频信号的装置和方法，以通过维持频率区域的频率分辨率来同时支持SC-FDMA系统中的至少两个信道。 用于发送无线通信系统的导频信号的装置包括数字付里叶变换器（213），导频信号发生器（220），时分复用器（218）和符号和子载波映射单元（214）。 数字傅立叶变换器对数据信号进行数字傅里叶变换。 导频信号发生器产生在频率区域中移动预定间隔的导频信号。 时分复用器对导频信号和变换后的数据信号进行时分复用，并通过天线发送时分复用信号。 符号和子载波映射单元确定发送导频信号和数据信号的子载波，并将数据信号映射到确定的子载波。
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Patent Agency Ranking
公开(公告)号：KR1020080051307A
公开(公告)日：2008-06-11
申请号：KR1020060122148
申请日：2006-12-05
Applicant: 한국전자통신연구원
CPC classification number: H04L7/0004 , H04W56/00
Abstract: A method and an apparatus for obtaining a timing synchronization signal in a radio channel measurement system are provided to measure a radio channel in a dead zone by generating phase-synchronized timing synchronization signals in respective timing modules. A timing synchronization acquiring apparatus includes a synchronous clock generator(101), a clock counter(103), and a reset button(115). Timing modules are arranged in transmitter and receiver systems for measuring radio channels using multiple antennas. The synchronous clock generator receives an external clock, synchronizes phases of the external clock with an internal clock, and outputs a synchronized external clock. The clock counter counts the clock from the synchronous clock generator according to a predetermined counter value, and generates a timing synchronization signal. The reset button resets the clock counter according to a reset signal and commences a timing process.
Abstract translation: 提供了一种在无线电信道测量系统中获得定时同步信号的方法和装置，用于通过在相应的定时模块中产生相位同步定时同步信号来测量死区中的无线电信道。 定时同步获取装置包括同步时钟发生器（101），时钟计数器（103）和复位按钮（115）。 定时模块安排在发射机和接收机系统中，用于测量使用多个天线的无线电信道。 同步时钟发生器接收外部时钟，使外部时钟的相位与内部时钟同步，并输出同步的外部时钟。 时钟计数器根据预定的计数器对来自同步时钟发生器的时钟进行计数，并产生定时同步信号。 复位按钮根据复位信号复位时钟计数器，并开始定时处理。
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公开(公告)号：KR1020080050204A
公开(公告)日：2008-06-05
申请号：KR1020070037629
申请日：2007-04-17
Applicant: 한국전자통신연구원
IPC: H04B1/7097
CPC classification number: H04B1/71075 , H04B1/71072 , H04B2201/70702
Abstract: An iterative reception method and an iterative receiver are provided to improve a reception performance by obtaining an accurate channel estimated value by iteratively updating the channel estimated value. An iterative receiver receives signals iteratively transmitted from a plurality of cells, and a channel estimator outputs a channel estimated value obtained by using pilot symbols of the reception signals(S100). If the number of iterative receptions is not a first sequence(S110), an inter-cell parallel interference canceler reduces an inter-cell interference of the reception signal by using spread value of hard decision values of the other remaining cell signals(second cell signals) than its pertinent cell signal, namely, the first cell signal, and outputs the same(S120). An equalizer performs channel equalization corresponding to each subcarrier on the inter-cell interference-reduced signal by using the channel estimated value, and the orthogonality of the corresponding signal is restored and outputted(S130). The orthogonality-restored signal is despread by a despreader and outputted(S140). The despread signal is inputted to a hard decision unit and used to calculate a hard decision value obtained by making a hard decision on a user symbol of the pertinent cell(S150). The hard decision value is re-spread by a hard decision spreader(S160).
Abstract translation: 提供迭代接收方法和迭代接收机，以通过迭代地更新信道估计值来获得准确的信道估计值来提高接收性能。 迭代接收机接收从多个小区迭代发送的信号，并且信道估计器输出通过使用接收信号的导频符号获得的信道估计值（S100）。 如果迭代接收次数不是第一序列（S110），则小区间并行干扰消除器通过使用其余剩余小区信号的硬判决值的扩展值来减少接收信号的小区间干扰（第二小区信号 ）比其相关单元信号，即第一单元信号，并输出相同的单元信号（S120）。 均衡器通过使用信道估计值来对小区间干扰减少信号上的每个子载波进行信道均衡，并恢复并输出相应信号的正交性（S130）。 正交恢复信号由解扩器解扩并输出（S140）。 解扩信号被输入到硬判决单元，用于计算通过对相关单元的用户符号进行硬判定而获得的硬判定值（S150）。 硬决策扩展器重新传播硬判决值（S160）。
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公开(公告)号：KR100830538B1
公开(公告)日：2008-05-22
申请号：KR1020070021857
申请日：2007-03-06
Applicant: 한국전자통신연구원 , 경희대학교 산학협력단
CPC classification number: H04L1/1812 , H04L1/1816 , H04L1/1825 , H04L1/1845 , H04L2001/0097 , H04L1/004
Abstract: An H-ARQ(Hybrid Automatic Repeat reQuest) supporting method for cooperation transmission is provided to reduce an overhead of responsive information by selecting previously a transmitter for retransmission. A transmission error determination process is performed to receive a transmission error by receiving a data packet from at least one transmitter included in a cooperation group(S201,S202). A selection process is performed to select a retransmission group including at least one transmitter included in the cooperation group when the transmission error is determined(S205). A retransmission request according to the transmission error and responsive information corresponding to the retransmission transformer are transmitted to the cooperation group(S207).
Abstract translation: 提供用于协作传输的H-ARQ（混合自动重传请求）支持方法，以通过先前选择用于重传的发射机来减少响应信息的开销。 执行传输错误确定处理以通过从包括在协作组中的至少一个发射机接收数据分组来接收传输错误（S201，S202）。 执行选择处理以在确定传输错误时选择包括在协作组中的至少一个发射机的重发组（S205）。 根据发送错误的重传请求和与重发变压器对应的响应信息被发送到协作组（S207）。
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公开(公告)号：KR100829817B1
公开(公告)日：2008-05-16
申请号：KR1020070011015
申请日：2007-02-02
Applicant: 한국전자통신연구원
CPC classification number: H04B7/15542
Abstract: 중계기간의 간섭과 기지국 및 중계기 사이의 간섭을 줄여 자원 이용 효율을 높일 수 있는 셀룰러 시스템의 설계 방법에 따른 기지국, 중계기 및 단말이 개시된다.
중계기는 기지국에 의해 서비스되는 단말이 전송하는 제어 신호를 획득하여, 제어 신호의 레벨이 임계값보다 높은 단말을 간섭 단말 리스트에 등록한다. 그리고, 중계기는 기지국의 자원 할당 정보를 통해 간섭 단말 리스트에 속한 간섭 단말에 할당된 자원인 간섭 자원을 파악한다. 그리고, 중계기는 기지국으로부터 할당받은 자원 중에서 간섭 자원을 제외한 자원인 가용 자원을 파악하여, 가용 자원 중 일부를 단말에 할당한다.
중계기, 기지국, 간섭 회피-
公开(公告)号：KR1020080042680A
公开(公告)日：2008-05-15
申请号：KR1020070102610
申请日：2007-10-11
Applicant: 한국전자통신연구원
CPC classification number: H04L5/0007 , H04J11/00 , H04L5/0028 , H04L5/0048 , H04L25/0226 , H04L27/0008 , H04L27/2607 , H04L27/262 , H04L27/261 , H04L27/2628
Abstract: An apparatus and a method of pilot transmission to coexist OFDMA(Orthogonal Frequency Division Multiple Access) and SC-FDMA(Single Carrier-Frequency Division Multiple Access) are provided to use a pilot of a proper form according to a channel environment by allowing a pilot incorporated in an SC-FDMA symbol to have a flexible pattern. An apparatus of pilot transmission to coexist OFDMA and SC-FDMA includes a pilot inserting device(63), an up-sampling processing device(65), an interpolation processor(66), and a cyclic prefix(CP) inserting device(68). The pilot inserting device inserts a pilot into a symbol by receiving pilot information. The up-sampling processing device performs up-sampling parallel data inputted from a serial/parallel converter(64). The interpolation processor performs interpolation for symbols up-sampled by the up-sampling processing device. The cyclic prefix inserting device inserts a cyclic prefix symbol into output data of a parallel/serial converter(67).
Abstract translation: 提供了一种用于共存OFDMA（正交频分多址）和SC-FDMA（单载波 - 频分多址）的导频传输的装置和方法，以便根据信道环境使用适当形式的导频， 并入SC-FDMA符号以具有灵活的图案。 用于共存OFDMA和SC-FDMA的导频传输装置包括导频插入装置（63），上采样处理装置（65），内插处理器（66）和循环前缀（CP）插入装置（68） 。 导频插入装置通过接收导频信息将导频插入符号。 上采样处理装置执行从串行/并行转换器（64）输入的并行数据并行数据。 内插处理器对由上采样处理装置进行上采样的符号进行插值。 循环前缀插入装置将循环前缀符号插入到并行/串行转换器（67）的输出数据中。
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