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公开(公告)号：KR101268751B1
公开(公告)日：2013-05-29
申请号：KR1020090116654
申请日：2009-11-30
Applicant: 한국전자통신연구원
CPC classification number: H03M13/3746 , H03M13/09 , H03M13/27 , H03M13/2957 , H03M13/37 , H03M13/3905 , H03M13/45 , H03M13/6362 , H04L1/0045 , H04L1/0068
Abstract: 제1 수신데이터로부터심볼을검출하는심볼검출부와, 상기검출된심볼을이용하여제1 LLR(Log Likelihood Ratio) 값을연산하는 LLR 연산부, 및상기연산된제1 LLR 값에따라, 상기제1 수신데이터를디코딩하는디코더부를포함하는수신단에서의복조및 디코딩시스템이개시된다.
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公开(公告)号：KR1020100071360A
公开(公告)日：2010-06-29
申请号：KR1020080130040
申请日：2008-12-19
Applicant: 한국전자통신연구원
CPC classification number: H04L27/265 , H04L5/0023 , H04L27/261 , H04L27/2655 , H04L27/2695
Abstract: PURPOSE: A demodulator system and a method for controlling the same are provided to verify a channel with respect to a signal propagation path by dividing channels according to extracted orders based on a channel estimation value and the reference signal of data received from a plurality of receiving antennas. CONSTITUTION: A multiple carrier demodulator(110) extracts valid data by eliminating the protective section of data signal inputted from a plurality of antennas, performing a fast Fourier transformation, and eliminating the protective band. A channel estimator(120) extracts a reference signal from the valid data and synchronizes the valid data. Through a frequency and linear interpolation, the channel estimator calculates and outputs a channel estimate value based on the combination of antennas. A frame deformatter(130) extracts a channel for a signal propagation path from the synchronized data and successively outputs the channel. A protective section eliminator eliminates the protective section after an inverse fast Fourier transformation when a final signal is outputted from a base station modulator.
Abstract translation: 目的：提供一种解调器系统及其控制方法，用于基于信道估计值和从多个接收中接收的数据的参考信号，根据提取的次序对信道传播路径进行分割，以验证信道 天线。 构成：多载波解调器（110）通过消除从多个天线输入的数据信号的保护部分，执行快速傅立叶变换并消除保护频带来提取有效数据。 信道估计器（120）从有效数据中提取参考信号并同步有效数据。 通过频率和线性内插，信道估计器基于天线的组合计算并输出信道估计值。 帧去格式化器（130）从同步数据中提取用于信号传播路径的信道，并连续地输出该信道。 当从基站调制器输出最终信号时，保护部分消除器在快速傅里叶逆变换之后消除了保护部分。
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公开(公告)号：KR100766866B1
公开(公告)日：2007-10-12
申请号：KR1020060048018
申请日：2006-05-29
Applicant: 한국전자통신연구원
IPC: H04L27/26
Abstract: 본 발명은 직교 주파수 분할 다중 시스템의 셀 탐색 장치와 이를 이용한 셀 탐색 코드 구성 방법에 관한 것이다.
본 발명은 직교 주파수 분할 다중 시스템에서의 단말기 셀 탐색 장치와 구현 방법을 제공하며, 타이밍 옵셋이 있는 경우에도 효율적인 셀 탐색이 가능한 코드 구조를 제공한다.
본 발명은 다중 반송파를 사용하는 변복조 방식에서 타이밍 옵셋에 덜 민감한 효율적인 셀 탐색 코드를 구현할 수 있는 효과를 기대할 수 있다.
직교 주파수 분할 다중 시스템, 셀 탐색 코드, 셀 번호, 셀 그룹 번호-
公开(公告)号：KR100746997B1
公开(公告)日：2007-08-07
申请号：KR1020050120841
申请日：2005-12-09
Applicant: 한국전자통신연구원
IPC: H04L27/26
Abstract: 본 발명은 직교 주파수 분할 다중 시스템에서 전송 프레임 구성 방법과 그를 이용한 동기 획득 장치에 관한 것이다.
본 발명은 직교 주파수 분할 다중 시스템에서 송신 장치로부터 전송되는 OFDM(Orthogonal Frequency Division Multiplexing) 신호로부터 동기를 획득하는 장치에서 RAP(Random Access Preamble)와 CQMP(Channel Quality Measure Preamble)를 포함하는 OFDM 신호의 프레임을 이용하여 단말의 초기 심벌 타이밍을 추정하는 RA-P 처리기와 단말의 초기 심벌 타이밍 및 CQMP를 이용하여 심벌 타이밍과 주파수 옵셋을 알아내고 트래킹하는 CQM-P 처리기를 포함하는 동기 획득 장치를 제공한다.
본 발명은 직교 주파수 분할 다중화 시스템에서 동기부를 구현하여 빠르고 정확하게 동기를 획득할 수 있는 효과를 기대할 수 있다.
직교 주파수 분할 다중 시스템, 심벌 타이밍, 주파수 옵셋, 동기-
公开(公告)号：KR1020070061115A
公开(公告)日：2007-06-13
申请号：KR1020060048018
申请日：2006-05-29
Applicant: 한국전자통신연구원
IPC: H04L27/26
CPC classification number: H04L27/265 , H04B1/7083 , H04L27/2614
Abstract: An apparatus for searching a cell in an OFDM(Orthogonal Frequency Division Multiplexing) system and a method for forming a cell searching code using the same are provided to be less sensitive to a timing offset in modulation/demodulation methods using a multi-carrier. An apparatus for searching a cell in an OFDM system includes a fast Fourier transforming unit(100), a cell number determining unit(110), and a cell group number determining unit(120). The fast Fourier transforming unit(100) receives a wireless signal inputted from a base station, and fast-Fourier-transforms an OFDM symbol related to a cell search according to frame synchronization. The cell number determining unit determines cell number data through measuring electric power based on an output value of the fast Fourier transforming unit. The cell group number determining unit determines cell group data through measurement of the electric power based on the determined cell number data.
Abstract translation: 提供了一种用于在OFDM（正交频分复用）系统中搜索小区的装置以及使用其的用于形成小区搜索码的方法，对于使用多载波的调制/解调方法中的定时偏移较不敏感。 用于在OFDM系统中搜索小区的装置包括快速傅里叶变换单元（100），单元号确定单元（110）和单元组数量确定单元（120）。 快速傅立叶变换单元（100）接收从基站输入的无线信号，并且根据帧同步对与小区搜索相关的OFDM符号进行快速傅里叶变换。 单元号确定单元基于快速傅里叶变换单元的输出值，通过测量电力来确定单元号数据。 小区组号决定单元基于确定的小区号数据，通过测定电力来确定小区组数据。
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Patent Agency Ranking
公开(公告)号：KR1020070060806A
公开(公告)日：2007-06-13
申请号：KR1020050120841
申请日：2005-12-09
Applicant: 한국전자통신연구원
IPC: H04L27/26
CPC classification number: H04L27/2692 , H04L27/2602 , H04L27/2614 , H04L27/2628 , H04L27/2678 , H04L27/2695
Abstract: A method for forming a transmission frame in an OFDMA (Orthogonal Frequency Division Multiple Access) system and an apparatus for acquiring synchronization using the same are provided to acquire synchronization correctly and rapidly by implementing a synchronization unit simply. An apparatus for acquiring synchronization using a method for forming a transmission frame in an OFDMA system includes an RA-P(Random Access Preamble) processor(20), and a CQM-P(Channel Quality Measure Preamble) processor(30). The RA-P processor(20) estimates an initial symbol timing of a terminal based on a frame of an OFDM signal having an RAP and a CQMP. The CQM-P processor(30) tracks a symbol timing and a frequency offset based on the CQMP and the initial symbol timing of the terminal. An RA-P code multiplier(200) generates an RAP channel code by multiplying output information of a register by the inputted RA-P code. A timing/SNR(Signal to Noise Ratio) estimator(300) calculates the timing synchronization and the SNR based on the information received from the RA-P code multiplier(200). An RA-P extractor(400) calculates and outputs the SNR, a RACN(Random Access Channel Number) and timing information based on the information received from the timing/SNR estimator(300).
Abstract translation: 提供了一种用于在OFDMA（正交频分多址）系统中形成传输帧的方法和用于获取同步的装置，以通过简单地实现同步单元来正确且快速地获取同步。 一种用于在OFDMA系统中使用用于形成传输帧的方法来获取同步的装置包括RA-P（随机接入前导码）处理器（20）和CQM-P（信道质量测量前导码）处理器（30）。 RA-P处理器（20）基于具有RAP和CQMP的OFDM信号的帧来估计终端的初始符号定时。 CQM-P处理器（30）基于CQMP和终端的初始符号定时跟踪符号定时和频率偏移。 RA-P码乘法器（200）通过将寄存器的输出信息乘以输入的RA-P码来产生RAP信道码。 定时/ SNR（信噪比）估计器（300）基于从RA-P代码乘法器（200）接收的信息计算定时同步和SNR。 RA-P提取器（400）基于从定时/ SNR估计器（300）接收的信息，计算和输出SNR，RACN（随机接入信道号）和定时信息。
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公开(公告)号：KR1020060069141A
公开(公告)日：2006-06-21
申请号：KR1020040108243
申请日：2004-12-17
Applicant: 한국전자통신연구원
CPC classification number: H04W72/0406 , H04W72/0413 , H04W72/042 , H04B7/2612
Abstract: 본 발명은 패킷 데이터 서비스를 위한 무선자원 할당 시스템 및 무선자원 할당 방법에 관한 것이다.
본 발명의 기지국은 단말기와의 무선 접속을 수행하는 물리계층부와 단말기로부터 서비스별 자원할당 요구가 있는 경우 단말기에 대한 서비스별 자원할당을 수행하는 MAC 계층부를 가진다. 제어국은 기지국과 유선 네트워크를 통해 망과의 인터페이스를 수행하는데, 본 발명의 기지국은 MAC 계층부로부터 서비스별 자원할당 결과를 보고받는 상위계층부를 가진다.
본 발명에 따르면, 물리계층의 제어부분 영역에 위치하는 MAC 계층부가 무선 자원을 관리하기 때문에 계층간의 중복된 기능으로 인해 낭비되는 제어 시간을 줄이고 좀더 빠르고 효율적으로 제어를 실행할 수 있다.
자원할당, MAC, 서비스별 자원, 패킷 통신-
公开(公告)号：KR100435790B1
公开(公告)日：2004-06-10
申请号：KR1020010054710
申请日：2001-09-06
Applicant: 한국전자통신연구원
IPC: H04B7/216
Abstract: PURPOSE: An adaptive code bank managing method for allocating code channels in a mobile communication system and an apparatus therefor are provided to calculate the maximum number of allocable code channels according to wireless channel environments, and to adaptively vary the code bank by the size of communication traffic, so as to improve efficiency in communication channel use. CONSTITUTION: If a request for using code channels is generated, a channel number adjustor of a code bank management unit calculates the number of necessary code channels(S100,S110). The channel number adjustor calculates a link gain between a mobile station and a base station, on the basis of power amount allocated to all currently used code channels, total noise and interference amount, and SIR(Signal-to-Interference Rate)(S120,S130). The channel number adjustor calculates the number of additionally allocable code channels(S140). The channel number adjustor calculates the size of a code bank(S150). A channel allocator compares the number of necessary codes with the number of available channel codes(S160). If the number of necessary codes is larger, the channel allocator declares the failure of code channel allocation(S170). And if the number of necessary codes is smaller, the channel allocator allocates code channels(S180).
Abstract translation: 目的：提供一种用于在移动通信系统中分配代码信道的自适应代码组管理方法及其装置，用于根据无线信道环境计算可分配代码信道的最大数量，并且通过通信的大小自适应地改变代码组 流量，从而提高沟通渠道使用效率。 构成：如果产生使用代码信道的请求，则代码库管理单元的信道号码调整器计算必要代码信道的数量（S100，S110）。 信道号调整器根据分配给所有当前使用的码信道的功率量，总噪声和干扰量以及SIR（信号干扰比）来计算移动台和基站之间的链路增益（S120， S130）。 频道号码调整器计算可额外分配的代码频道的数量（S140）。 频道号码调整器计算码组的大小（S150）。 信道分配器将必要的码数与可用信道码的数量进行比较（S160）。 如果所需代码的数量较大，则信道分配器声明代码信道分配失败（S170）。 并且如果所需代码的数量较少，则信道分配器分配代码信道（S180）。
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公开(公告)号：KR1020040009109A
公开(公告)日：2004-01-31
申请号：KR1020020042942
申请日：2002-07-22
Applicant: 한국전자통신연구원
IPC: H04B1/00
CPC classification number: H04L1/0071 , H04L1/0026 , H04L27/2627
Abstract: PURPOSE: An interleaving/deinterleaving device in a communication system using channel reciprocity is provided to transmit bits having high priorities to a part where delay between an uplink and a downlink is small, and to transmit bits having low priorities to a part where the delay is big, thereby reducing error rates of the bits having the high priorities. CONSTITUTION: An encoder(31) encodes inputted data bits. Interleavers1 and 2(32,33) distinguish the encoded bits into bits having high priorities and bits having low priorities, and interleave the distinguished bits, respectively. A multiplexer(34) multiplexes the encoded bits having the high priorities in a part highly correlated to an uplink, and multiplexes the bits having the low priorities in a part lowly correlated to the uplink. A modulator(35) modulates the bits multiplexed through the multiplexer(34).
Abstract translation: 目的：提供使用信道互换的通信系统中的交织/解交织装置，将具有高优先级的比特发送到上行链路与下行链路之间的延迟较小的部分，并将低优先级的比特发送到延迟为零的部分 大，从而降低具有高优先级的比特的错误率。 构成：编码器（31）对输入的数据位进行编码。 交织器1和2（32,33）将编码的比特区分为具有高优先级的比特和具有低优先级的比特，并分别交织不同的比特。 多路复用器（34）多路复用与上行链路高度相关的部分具有高优先级的编码比特，并将具有低优先级的比特复用在与上行链路低度相关的部分中。 调制器（35）对通过多路复用器（34）复用的比特进行调制。
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公开(公告)号：KR100411882B1
公开(公告)日：2003-12-24
申请号：KR1020010047762
申请日：2001-08-08
Applicant: 한국전자통신연구원
IPC: H03M13/00
Abstract: PURPOSE: A sequential decoding apparatus of a mobile communication system and a method thereof are provided to efficiently decode a stream of symbols encoded by a convolution code when the stream is transmitted through a channel in the mobile communication system. CONSTITUTION: A CPU(202) controls a total decoding operation. An optimal path determination buffer(210) sequentially stores an optical path. A competitive path determination buffer(210) sequentially stores at least one competitive path. A buffer controller controls the optimal path determination buffer(210) and the competitive path determination buffer(210) using a control signal from the CPU(202). An encoder(214) encodes signals from the optimal path determination buffer(210) and the competitive path determination buffer(210) by the set bit number. A bit metric calculation(216) calculates a metric using the signals from the optimal path determination buffer(210) and the competitive path determination buffer(210) and an input signal.
Abstract translation: 目的：提供一种移动通信系统的顺序解码设备及其方法，用于当在移动通信系统中通过信道发送流时，有效地解码由卷积码编码的符号流。 构成：CPU（202）控制全部解码操作。 最佳路径确定缓冲器（210）顺序存储光路。 竞争路径确定缓冲器（210）顺序地存储至少一个竞争路径。 缓冲器控制器使用来自CPU（202）的控制信号来控制最佳路径确定缓冲器（210）和竞争路径确定缓冲器（210）。 编码器（214）通过设置的位数对来自最佳路径确定缓冲器（210）和竞争路径确定缓冲器（210）的信号进行编码。 比特度量计算（216）使用来自最佳路径确定缓冲器（210）和竞争路径确定缓冲器（210）的信号和输入信号来计算度量。
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