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公开(公告)号：KR1020150084300A
公开(公告)日：2015-07-22
申请号：KR1020140004165
申请日：2014-01-13
Applicant: 한국전자통신연구원
IPC: H04L27/26
CPC classification number: H04L27/2626
Abstract: OFDM(Orthogonal Frequency Division Multiplexing) 무선전송시스템에서, 전송하고자하는데이터에대한데이터레이트가설정값에해당하는경우, 파일럿톤의파워를제1 설정배수만큼증가시켜설정한다. 그리고이러한파일럿톤을포함하는전송신호를생성하여송신한다.
Abstract translation: OFDM（正交频分复用）无线传输系统技术领域本发明涉及一种OFDM（正交频分复用）无线传输系统，其中如果要传输的数据的数据速率等于设定值，则导频音功率增加设定值1的倍数。 生成并发送包含导频音的发送信号。
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公开(公告)号：KR1020130029687A
公开(公告)日：2013-03-25
申请号：KR1020110093117
申请日：2011-09-15
Applicant: 한국전자통신연구원
CPC classification number: H04W56/0035 , H04W56/0085
Abstract: PURPOSE: A method for obtaining receipt synchronization in a near field communication system and a device thereof are provided to efficiently and easily obtain synchronization from a receiving signal formed with a frame structure including an STF(Short Training Field) having a repeated pattern. CONSTITUTION: A receiving device(11) includes a packet detecting unit(13), a gain control unit(14), first processing units(15,16), second processing units(17,18), and a timing synchronizing unit(19). The packet detecting unit detects a packet from a receiving signal based on a plurality of STF patterns. A gain control unit measures power based on the STF patterns and controls an amplification gain of the receiving signal based on the measured power. The first processing units perform frequency error estimation to the STF patterns of the receiving signal to obtain a phase error of each sample unit composing the STF patterns. The first processing units perform first frequency error estimation and compensation for correcting a frequency of the STF patterns based on the obtained phase error. The second processing units perform frequency error estimation to the STF patterns outputted after the first frequency error estimation and compensation to obtain a phase error of each sample unit composing the STF patterns. The second processing units correct the frequency of the STF patterns based on the obtained phase error. The timing synchronizing unit detect a frame timing by performing cross correlation to a predetermined number of STF patterns among the STF patterns outputted after the second frequency error estimation and compensation. [Reference numerals] (11) Receiving device; (12) Sampling unit; (13) Packet detecting unit; (14) Gain control unit; (15) First frequency error estimating unit; (16) First error correcting unit; (17) Second frequency error estimating unit; (18) Second error correcting unit; (19) Timing synchronizing unit; (20) Frame boundary detecting unit
Abstract translation: 目的：提供一种用于在近场通信系统及其装置中获得接收同步的方法，以便从包含具有重复模式的STF（Short Training Field）的帧结构的接收信号中有效地并且容易地获得同步。 构成：接收装置（11）包括分组检测单元（13），增益控制单元（14），第一处理单元（15,16），第二处理单元（17,18）和定时同步单元（19） ）。 分组检测单元基于多个STF模式从接收信号检测分组。 增益控制单元基于STF模式测量功率，并且基于测量的功率来控制接收信号的放大增益。 第一处理单元对接收信号的STF模式执行频率误差估计，以获得构成STF模式的每个采样单元的相位误差。 第一处理单元基于获得的相位误差执行第一频率误差估计和补偿，以校正STF模式的频率。 第二处理单元对在第一频率误差估计和补偿之后输出的STF模式执行频率误差估计，以获得构成STF模式的每个采样单元的相位误差。 第二处理单元基于获得的相位误差校正STF图案的频率。 定时同步单元通过对在第二频率误差估计和补偿之后输出的STF模式中的预定数量的STF模式进行互相关来检测帧定时。 （附图标记）（11）接收装置; （12）采样单元; （13）分组检测单元; （14）增益控制单元; （15）第一频率误差估计单元; （16）第一纠错单元; （17）第二频率误差估计单元; （18）第二纠错单元; （19）定时同步单元; （20）帧边界检测单元
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公开(公告)号：KR1020120071110A
公开(公告)日：2012-07-02
申请号：KR1020100132714
申请日：2010-12-22
Applicant: 한국전자통신연구원
CPC classification number: H04W52/0216 , H04W52/0229 , Y02D70/21 , H04W48/08 , H04W48/16 , Y02D70/00
Abstract: PURPOSE: A base station, a terminal, and an operation method thereof are provided to support a terminal in a low power mode and to reduce power consumption of a terminal. CONSTITUTION: If a structure of a network is in a high-speed mode, a terminal is cooperated with a base station of the network(S103,S105). The terminal is converted into a low-speed mode(S107). The terminal is cooperated with the base station in the low-speed mode(S109). The terminal is converted into a low-power mode(S111). The terminal enters an active section(S113,S115).
Abstract translation: 目的：提供基站，终端及其操作方法，以支持低功率模式的终端并降低终端的功耗。 构成：如果网络的结构处于高速模式，则终端与网络的基站进行协作（S103，S105）。 终端被转换成低速模式（S107）。 终端以低速模式与基站协作（S109）。 终端被转换成低功率模式（S111）。 终端进入有效部分（S113，S115）。
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公开(公告)号：KR1020120051460A
公开(公告)日：2012-05-22
申请号：KR1020100112903
申请日：2010-11-12
Applicant: 한국전자통신연구원 , 충남대학교산학협력단
IPC: H04J11/00
CPC classification number: H04B1/123 , H04J11/00 , H04L25/0224 , H04L27/2695
Abstract: PURPOSE: A receiving apparatus in an OFDM(Orthogonal Frequency Division Multiplexing) system is provided to detect reception signals by estimating distortion matrices combining the unbalanced component of in-phase signals and Quadrature-phase signals and a channel frequency response characteristic. CONSTITUTION: A distortion matrix estimating unit receives a preamble signal including two different long training field symbols. The distortion matrix estimating unit estimates a distortion matrix. An OFDM(Orthogonal Frequency Division Multiplexing) signal processing unit compensates for distortion components from the reception signals by using the distortion matrix. A transmitter includes a preamble generation unit and an OFDM signal processing unit. The preamble generation unit transmits the preamble through two symbol periods by applying Alamouti technique to make a 2x2 non-singular matrix. The OFDM signal processing unit processes transmission signals and the preamble by OFDM.
Abstract translation: 目的：提供OFDM（正交频分复用）系统中的接收装置，通过估计组合同相信号的不平衡分量和正交相位信号以及信道频率响应特性的失真矩阵来检测接收信号。 构成：失真矩阵估计单元接收包括两个不同的长训练场符号的前导码信号。 失真矩阵估计单元估计失真矩阵。 OFDM（正交频分复用）信号处理单元通过使用失真矩阵来补偿来自接收信号的失真分量。 发射机包括前导码生成单元和OFDM信号处理单元。 前导码生成单元通过应用Alamouti技术来形成2×2个非奇异矩阵，通过两个符号周期来发送前同步码。 OFDM信号处理单元通过OFDM处理发送信号和前导码。
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公开(公告)号：KR100998759B1
公开(公告)日：2010-12-07
申请号：KR1020080103802
申请日：2008-10-22
Applicant: 한국전자통신연구원
IPC: H04B1/10
Abstract: 본 발명은 초광대역 시스템에서의 피 간섭 신호 검출방법 및 이를 수행하는 초광대역 단말에 관한 것이다.
본 발명에 따르면, 디지털 신호로 변환된 수신신호를 주파수 천이시키고 필터링 한 뒤, 피 간섭 신호가 이미 알려진 시스템 신호에 해당하는 경우에는 해당 시스템 신호와의 신호상관을 통해 피 간섭 신호의 수신레벨 및 피 간섭 신호 검출여부를 결정하고, 피 간섭 신호가 알려지지 않은 신호인 경우에는 필터링된 신호의 전력 값을 이용하여 피 간섭 신호의 수신레벨 및 피 간섭 신호 검출여부를 결정한다.
UWB, 간섭, 상관, interference, DAA-
Patent Agency Ranking
公开(公告)号：KR100893737B1
公开(公告)日：2009-04-17
申请号：KR1020070132577
申请日：2007-12-17
Applicant: 한국전자통신연구원
CPC classification number: H04L27/2665 , H04L27/2656 , H04L27/2657 , H04L27/2675
Abstract: An apparatus and method for receiving signal for extent limitation of timing synchronization in MB-OFDM UWB system is provided to guarantee the stable receiving performance even in the system environment in which the frequency offset is serious. The receiving device(1200) of the MB-OFDM UWB system includes two shift registers(1212, 1214), two packet detection(1216, 1220) and timing synchronization, the comparator(1224), and the routing selector(1226). The shift register classifies sampled digital samples into respective first data and the second data path. The respective packet detection and timing synchronization performs the packet detection and timing synchronization about two data paths. The comparator compares t the cross-correlation value of the timing synchronization spot in two data paths. The routing selector selects data of the route having the larger cross-correlation value.
Abstract translation: 提供了一种用于在MB-OFDM UWB系统中接收定时同步的范围限制的信号的装置和方法，以保证即使在频率偏移严重的系统环境中也能保持稳定的接收性能。 MB-OFDM UWB系统的接收设备（1200）包括两个移位寄存器（1212,1214），两个分组检测（1216,1220）和定时同步，比较器（1224）和路由选择器（1226）。 移位寄存器将采样的数字样本分类为相应的第一数据和第二数据路径。 相应的分组检测和定时同步对于两个数据路径执行分组检测和定时同步。 比较器比较两个数据路径中定时同步点的互相关值。 路由选择器选择具有较大互相关值的路由的数据。
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公开(公告)号：KR100882358B1
公开(公告)日：2009-02-12
申请号：KR1020070089097
申请日：2007-09-03
Applicant: 한국전자통신연구원
Abstract: 본 발명은, 다이나믹 이득 조절기 및 자동 이득 제어기를 구비하는 수신기를 포함하는 멀티밴드-직교주파수분할방식 초광대역(MB-OFDM UWB) 시스템에서 효율적인 피코넷을 형성하기 위해, 상기 자동 이득 제어기의 알고리즘을 구동 후 자동 이득 제어 인덱스를 추출하고, 상기 추출된 자동 이득 제어 인덱스를 이용하여 씨씨에이(CCA) 상태를 파악하여 파악된 CCA 상태가 높은 상태이면 상기 자동 이득 제어 인덱스를 이용하여 각 데이터 전송율 별 요구 수신 전력을 기반으로 물리계층에서 MAC 계층으로 제공할 링크 품질 표시(LQI) 정보를 간단하게 생성함으로써, 현 데이터 전송율 모드의 송신전력제어 또는 데이터 전송율 모드 변환이 필요한지 직관적으로 판단할 수 있는 효과가 있다.
MB-OFDM UWB 시스템, LQI, RSSI, CCA, AGC 알고리즘, AGC 인덱스, DGC, MAC 계층, 물리계층, ADC, DAC-
公开(公告)号：KR1020080044717A
公开(公告)日：2008-05-21
申请号：KR1020060114125
申请日：2006-11-17
Applicant: 한국전자통신연구원
CPC classification number: H04L27/2628 , H04L1/0009 , H04L1/0071 , H04L27/2644 , H04L27/2678 , H04L27/2692
Abstract: A UWB(Ultra-Wide Band) transmission apparatus of an OFDM(Orthogonal Frequency-Division Multiplexing) system and a UWB transmission method using the same are provided to enhance accuracy in removing an image signal by increasing a guard frequency interval of a baseband signal and an image signal. A channel coding unit(110) codes data bits according to an MB OFDM(Orthogonal Frequency-Division Multiplexing) PHY standard. An interleaving and mapping unit(120) rearranges the coded data bits and performs severally a mapping operation. A symbol modulation unit(130) modulates the interleaved and mapped data bits to QPSK(Quadrature Phase Shift Keying) symbols by using a QPSK modulation method. A preamble and guard interval insertion unit(150) inserts a preamble and guard interval into a time domain signal. A DAC(Digital Analog Converter)(170) converts I(Inphase) and Q(Quadrature) elements of the time domain signal by using a digital to analog conversion method. An LPF(Low Pass Filter)(180) removes an image from an output signal of the DAC and transmits the corresponding signal through an antenna.
Abstract translation: 提供OFDM（正交频分复用）系统的UWB（超宽带）发送装置和使用该UWB的UWB发送装置，以通过增加基带信号的保护频率间隔来提高去除图像信号的精度， 图像信号。 信道编码单元（110）根据MB OFDM（正交频分复用）PHY标准对数据位进行编码。 交织映射单元（120）重新排列编码数据位，并分别执行映射操作。 符号调制单元（130）通过使用QPSK调制方法将交错和映射的数据位调制为QPSK（正交相移键控）符号。 前同步码和保护间隔插入单元（150）将前同步码和保护间隔插入到时域信号中。 DAC（数字模拟转换器）（170）通过使用数模转换方法来转换时域信号的I（同相）和Q（正交）元素。 LPF（低通滤波器）（180）从DAC的输出信号中去除图像，并通过天线发送相应的信号。
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公开(公告)号：KR100636372B1
公开(公告)日：2006-10-19
申请号：KR1020050113699
申请日：2005-11-25
Applicant: 한국전자통신연구원 , 건국대학교 산학협력단
Abstract: A phase error estimator and a phase error estimating system using the estimator are provided to repeatedly correct phase errors by using probability information of a transmission signal generated from a turbo code decoder, in order to estimate the phase errors in a baseband. An LAPPR(Log A Posterior Probability Ratio) value estimator(21) converts soft output information delivered from the outside into LAPPR values, and estimates negative log probability values(probability information) for each transmission symbol. An APP(A Posterior Probability) value calculator(22) calculates APP values by applying negative exponential functions to each transmission symbols. An average value determiner(23) determines average values for each transmission symbol by entirely/partially/selectively using the probability information, according to a probability information use type. A symbol phase estimator(24) estimates phases of the symbols, based on the determined average values.
Abstract translation: 提供使用估计器的相位误差估计器和相位误差估计系统，以通过使用从turbo码解码器产生的传输信号的概率信息来重复地校正相位误差，以便估计基带中的相位误差。 LAPPR（对数后验概率比）值估计器（21）将从外部传递的软输出信息转换为LAPPR值，并估计每个传输符号的负对数概率值（概率信息）。 APP（后验概率）值计算器（22）通过对每个传输符号应用负指数函数来计算APP值。 平均值确定器（23）根据概率信息使用类型通过完全/部分/选择性地使用概率信息来确定每个传输符号的平均值。 符号相位估计器（24）基于确定的平均值来估计符号的相位。
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