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公开(公告)号：KR1020080012150A
公开(公告)日：2008-02-11
申请号：KR1020070072449
申请日：2007-07-19
CPC classification number: H04J11/0093 , H04W48/16 , H04W56/0055 , H04W64/00
Abstract: A data transmission method of an MS(Mobile Station) using a cell search signal and a device thereof are provided to enable the MS to determine a location by itself by using cell search signals received from base stations within a home cell and neighboring cells, and to estimate uplink delay time information, thereby omitting RACH(Random Access Channel) burst transmission. An MS receives cell search signals from base stations within a synchronized home cell and base stations within at least more than neighboring cell(S710). The MS calculates receiving time differences between the cell search signals received from the base stations within the home cell and the neighboring cells(S720). The MS calculates uplink delay time of the neighboring cells based on the receiving time differences(S730).
Abstract translation: 提供使用小区搜索信号的MS（移动站）的数据传输方法及其装置，以使得MS能够通过使用从家庭小区和邻近小区内的基站接收的小区搜索信号来自己确定位置，以及 以估计上行链路延迟时间信息，从而省略RACH（随机接入信道）突发传输。 MS在至少相邻小区内的同步家庭小区和基站内的基站接收小区搜索信号（S710）。 MS计算从家庭小区内的基站和相邻小区接收的小区搜索信号之间的接收时间差（S720）。 MS根据接收时间差计算相邻小区的上行延迟时间（S730）。
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公开(公告)号：KR1020080010254A
公开(公告)日：2008-01-30
申请号：KR1020060107489
申请日：2006-11-01
CPC classification number: H04B1/7083 , H04B7/2621 , H04W84/02
Abstract: A cell search method in an OFDM(Orthogonal Frequency Division Multiplexing) cellular system, a frame transmission method therefor, and a forward link frame structure are provided to smoothly perform handover by effectively searching an adjacent cell, and reduce the amount of battery consumption of a mobile station. The first detecting unit obtains symbol synchronization by applying a matching filter to a reception signal(S800). A hop pattern correlation values are calculated by using reception synchronous channel symbols extracted from the reception signal based on the obtained symbol synchronization information, and a hop pattern of a target cell is detected based on the calculated hop pattern correlation values(S820). A code group and a frame boundary of the target cell are detected based on the detected hop pattern(S840). Pilot correlation values of common pilot channel symbols and scrambling codes belonging to the detected code group are calculated, and the scrambling codes of the target cell are detected based on the calculated pilot correlation value(S860). It is checked whether the detection results are reliable(S880).
Abstract translation: 提供了OFDM（正交频分复用）蜂窝系统中的小区搜索方法，其帧传输方法和前向链路帧结构，以通过有效地搜索相邻小区来平滑地执行切换，并且减少电池消耗量 移动台。 第一检测单元通过对接收信号应用匹配滤波器来获得符号同步（S800）。 通过使用基于获得的符号同步信息从接收信号提取的接收同步信道符号来计算跳模式相关值，并且基于所计算的跳频模式相关值来检测目标小区的跳频模式（S820）。 基于检测到的跳跃模式来检测目标小区的码组和帧边界（S840）。 计算属于所检测的代码组的公共导频信道符号和扰码的导频相关值，并且基于所计算的导频相关值来检测目标小区的扰码（S860）。 检查检测结果是否可靠（S880）。
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公开(公告)号：KR100790361B1
公开(公告)日：2008-01-03
申请号：KR1020060125151
申请日：2006-12-08
Applicant: 한국전자통신연구원
IPC: H04B17/00
Abstract: A base station channel card verifier is provided to shorten the period of development and stably perform an integrated test and a performance test by verifying a parallel subsystem function for each of the function blocks of a base station channel card. A base station channel card verifier(10) comprises a data storage unit(12), the first data interface unit(11), a data processing unit(13), and the second data interface units(14,15). The data storage unit(12) stores the output data of a base station channel card and test vectors, or input data to be transmitted to the base station channel card. The first data interface unit(11) consists of a plurality of interfaces having a data transfer rate of scores of Mbps in order to make a connection with the base station channel card. The data processing unit(13) delivers the data stored in the data storage unit(12) to the base station channel card through the first data interface unit(11), and stores the output data of the base station channel card, received through the first data interface unit(11), in the data storage unit(12). The second data interface units(14,15) support several-Gbps interfaces between the base station channel card and a transceiver.
Abstract translation: 提供基站信道卡验证器，以通过验证基站信道卡的每个功能块的并行子系统功能来缩短开发周期并稳定地执行集成测试和性能测试。 基站信道卡验证器（10）包括数据存储单元（12），第一数据接口单元（11），数据处理单元（13）和第二数据接口单元（14,15）。 数据存储单元（12）存储基站信道卡的输出数据和测试向量，或将要发送给基站信道卡的输入数据。 第一数据接口单元（11）由具有Mbps的数据传送速率的多个接口组成，以便与基站信道卡建立连接。 数据处理单元（13）通过第一数据接口单元（11）将存储在数据存储单元（12）中的数据传送到基站信道卡，并存储基站通道卡的输出数据 第一数据接口单元（11），在数据存储单元（12）中。 第二数据接口单元（14,15）支持基站信道卡和收发器之间的几Gbps接口。
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公开(公告)号：KR1020070117449A
公开(公告)日：2007-12-12
申请号：KR1020070042509
申请日：2007-05-02
Applicant: 한국전자통신연구원
IPC: H04J11/00
CPC classification number: H04L27/2657 , H04L5/0044 , H04L27/2628 , H04W72/0453
Abstract: An apparatus and a method for creating an orthogonal frequency division multiplexing(OFDM) signal are provided to decrease PAPR(Peak-to-Average Power Ratio) without attenuating bandwidth efficiency according to the transmission of additional information in an OFDM communication system. A symbol padding part(305) outputs an extended symbol stream by adding a part of a plurality of digital modulation symbols to the plurality of digital modulation symbols. A symbol search part(307) outputs plural weights corresponding to each of the plurality of digital modulation symbols by using FFT(Fast Fourier Transform) and IFFT(Inverse Fast Fourier Transform) by receiving the extended symbol stream. A symbol weight part(309) outputs a plurality of weight symbols by applying plural weights searched by the symbol search part to the plurality of digital modulation symbols by receiving the plurality of digital modulation symbols. A power compensation part(311) outputs a power compensation signal by compensating the variation of power according to the plural weights by receiving the plurality of weight symbols.
Abstract translation: 提供了一种用于创建正交频分复用（OFDM）信号的装置和方法，以便在OFDM通信系统中根据附加信息的传输而不衰减带宽效率来降低PAPR（Peak-to-Average Power Ratio）。 符号填充部分（305）通过将多个数字调制符号的一部分添加到多个数字调制符号来输出扩展符号流。 符号搜索部分（307）通过使用FFT（快速傅立叶变换）和IFFT（快速傅里叶逆变换）来输出与多个数字调制符号中的每一个对应的多个权重。 符号权重部分（309）通过接收多个数字调制符号，通过将由符号搜索部分搜索的多个权重应用于多个数字调制符号来输出多个权重符号。 功率补偿部（311）通过接收多个权重符号，通过根据多个权重来补偿功率的变化来输出功率补偿信号。
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公开(公告)号：KR1020070103704A
公开(公告)日：2007-10-24
申请号：KR1020070038150
申请日：2007-04-19
CPC classification number: H04B7/0602 , H04B7/12 , H04L1/0006 , H04L1/06 , H04L1/1893 , H04L5/0053 , H04L5/023 , H04L27/2626 , H04W52/10 , H04W52/146 , H04W52/286 , H04W52/48 , H04B7/0608 , H04L27/2601
Abstract: A transmission method for obtaining random access diversity in a mobile station is provided to increase the RACH(Random Access CHannel) signature detection probability of a base station by applying a TSTD(Time Switching Transmit Diversity) technique, a frequency hopping technique, and a power ramping technique to RACH burst transmission in various combinations. A transmitting apparatus having two Tx antennas(140,150) in a mobile station comprises an OFDMA(Orthogonal Frequency Division Multiple Access) modulating unit(110), a transmitting unit(120), and a power controlling unit(130). The OFDMA modulating unit(110) allocates an RACH burst(S1) to a specific subband, executes OFDMA modulation, and makes an RACH burst signal(S2). If an ACK signal for the RACH burst is received from a base station, the OFDMA modulating unit(110) modulates user packet data containing an RACH message and transmits the modulated data to the transmitting unit(120). The transmitting unit(120) transmits the RACH burst signal(S2), outputted from the OFDMA modulating unit(110), to the base station using the Tx antennas(140,150) alternately. If the ACK signal for the RACH burst is received, the transmitting unit(120) amplifies and upconverts the OFDMA-modulated user packet data and transmits the data through a Tx antenna which receives the ACK signal. The power controlling unit(130) creates a control signal(S4) to control the power of the RACH burst signal(S2).
Abstract translation: 提供一种用于获得移动台中的随机接入分集的传输方法，以通过应用TSTD（时间切换发射分集）技术，跳频技术和功率来增加基站的RACH（随机接入信道）签名检测概率 RACH技术以RACH突发传输方式进行各种组合。 在移动站中具有两个Tx天线（140,150）的发送装置包括OFDMA（正交频分多址）调制单元（110），发送单元（120）和功率控制单元（130）。 OFDMA调制单元（110）向特定子带分配RACH突发（S1），执行OFDMA调制，并生成RACH突发信号（S2）。 如果从基站接收到用于RACH突发的ACK信号，则OFDMA调制单元（110）调制包含RACH消息的用户分组数据，并将调制数据发送到发送单元（120）。 发送单元（120）使用Tx天线（140,150）交替地将从OFDMA调制单元（110）输出的RACH脉冲串信号（S2）发送到基站。 如果接收到用于RACH脉冲串的ACK信号，则发送单元（120）放大和上变换OFDMA调制的用户分组数据，并通过接收ACK信号的Tx天线发送数据。 功率控制单元（130）创建控制信号（S4）以控制RACH突发信号的功率（S2）。
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Patent Agency Ranking
公开(公告)号：KR1020070083402A
公开(公告)日：2007-08-24
申请号：KR1020070010951
申请日：2007-02-02
Applicant: 한국전자통신연구원
IPC: H04B7/04
CPC classification number: H04B7/0691 , H04B7/0408 , H04B7/0634 , H04B7/0639
Abstract: A method for transmitting signals in a base station and a method for transmitting feedback information in a mobile terminal are provided to decrease the amount of feedback information, transmitted to a base station from a mobile terminal, by previously allocating some precoding matrixes or Tx antennas to each frequency group. A base station segments an allocated frequency band into a plurality of frequency groups. The base station allocates one or more precoding matrixes among a plurality of precoding matrixes to each of the divided frequency groups. The base station receives feedback information from a mobile terminal. The base station transmits signals using the frequency of a frequency group corresponding to the received feedback information and the precoding matrixes allocated to the corresponding frequency group.
Abstract translation: 提供一种用于在基站中发送信号的方法和用于在移动终端中发送反馈信息的方法，以通过预先分配一些预编码矩阵或Tx天线来减少从移动终端发送到基站的反馈信息量 每个频率组。 基站将分配的频带划分成多个频率组。 基站将多个预编码矩阵中的一个或多个预编码矩阵分配给每个划分的频率组。 基站从移动终端接收反馈信息。 基站使用与接收的反馈信息对应的频率组的频率和分配给相应的频率组的预编码矩阵来发送信号。
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公开(公告)号：KR1020070073593A
公开(公告)日：2007-07-10
申请号：KR1020060136322
申请日：2006-12-28
Applicant: 한국전자통신연구원
CPC classification number: H04J11/0079 , H04L27/261 , H04L27/2613 , H04L27/2656 , H04L27/2685
Abstract: A method for creating a downlink signal and a method for cell searching are provided to enable a mobile station to execute fast synchronization acquisition and cell searching by dividing a frame into a plurality of synchronization blocks and arranging a frame synchronization identification sequence for each synchronization blocks. A downlink frame creation part creates a downlink frame containing a plurality of synchronization blocks, and arranges an identical cell ID code group at the synchronization intervals(S110). An IFFT(Inverse Fast Fourier Transform) computation part executes IFFT by using the downlink frame and creates a time domain signal(S120). A frame synchronization application part applies a frame synchronization identification sequence to each synchronization blocks and creates a downlink signal(S130). A transmitting part converts the created downlink signal into an analog signal, executes modulation and demodulation, and transmits the result through an antenna(S140).
Abstract translation: 提供一种用于创建下行链路信号的方法和用于小区搜索的方法，以使得移动台能够通过将帧划分为多个同步块并且为每个同步块布置帧同步识别序列来执行快速同步捕获和小区搜索。 下行链路帧创建部分创建包含多个同步块的下行链路帧，并以同步间隔排列相同的小区ID码组（S110）。 IFFT（逆快速傅里叶变换）计算部分通过使用下行链路帧来执行IFFT，并创建时域信号（S120）。 帧同步应用部分对每个同步块应用帧同步识别序列，并创建下行链路信号（S130）。 发送部分将创建的下行链路信号转换为模拟信号，执行调制和解调，并通过天线发送结果（S140）。
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公开(公告)号：KR1020070073591A
公开(公告)日：2007-07-10
申请号：KR1020060136320
申请日：2006-12-28
Applicant: 한국전자통신연구원
CPC classification number: H04J11/0079 , H04L27/261 , H04L27/2613 , H04L27/2656
Abstract: An apparatus and a method for generating a downlink signal, and an apparatus and a method for searching a cell are provided to perform a rapid synchronization acquisition and a cell search by dividing one frame into a plurality of synchronization blocks and arranging a different synchronization identifying sequence in each synchronization block. A method for generating a downlink signal includes the steps of: generating a downlink frame(S110); arranging a cell group identifying sequence corresponding to a predetermined cell in a synchronization section of the downlink frame so that a plurality of repeated patterns are formed in a time domain(S130); transforming the downlink frame into a time domain signal; and multiplying a plurality of orthogonal identifying codes which form a frame synchronization identifying sequence in a time domain signal by the plurality of repeated patterns, and generating the downlink signal.
Abstract translation: 提供一种用于生成下行链路信号的装置和方法，以及用于搜索小区的装置和方法，用于通过将一帧划分成多个同步块来执行快速同步捕获和小区搜索，并且布置不同的同步识别序列 在每个同步块中。 一种用于产生下行链路信号的方法包括以下步骤：产生下行链路帧（S110）; 在下行链路帧的同步部分中布置与预定小区相对应的小区组识别序列，使得在时域中形成多个重复模式（S130）; 将下行链路帧转换为时域信号; 以及通过所述多个重复模式将形成时域信号中的帧同步识别序列的多个正交识别码相乘，并生成所述下行链路信号。
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公开(公告)号：KR1020070064237A
公开(公告)日：2007-06-20
申请号：KR1020060086983
申请日：2006-09-08
Applicant: 한국전자통신연구원
CPC classification number: H04L27/2647 , H04L25/03286 , H04L27/01 , H04L27/2628
Abstract: An apparatus for generating a down link signal, and a method and an apparatus for restoring data in a cellular system are provided to improve calculation efficiency of LLR(Log-Likelihood Ratio) for a soft decision by calculating interference fading and noise. A method for restoring data in a cellular system includes the steps of: performing equalization for compensating delivering time delay deviation and reduction for each frequency included in a received signal(S110); detecting interference element caused by fading inside a cell, and channel coefficients including fading element generated by neighboring cells(S120); detecting a dispersion of an AWGN(Additive White Gaussian Noise) element included in the received signal(S130); calculating the dispersion of entire noise element which the fading element and AWGN is considered(S140); calculating an LLR for a corresponding received signals(S150); and deciding the received signal by performing a soft decision by using the LLR.
Abstract translation: 提供一种用于生成下行链路信号的装置，以及用于在蜂窝系统中恢复数据的方法和装置，以通过计算干扰衰落和噪声来提高用于软判决的LLR（对数似然比）的计算效率。 一种用于在蜂窝系统中恢复数据的方法包括以下步骤：执行用于补偿递送时间延迟偏差和包括在接收信号中的每个频率的减少的均衡（S110）; 检测由小区内的衰落引起的干扰元素，以及包括由相邻小区生成的衰落元素的信道系数（S120）。 检测包含在接收信号中的AWGN（加性白高斯噪声）元素的色散（S130）; 计算考虑衰落元素和AWGN的整个噪声要素的色散（S140）; 计算相应接收信号的LLR（S150）; 以及通过使用所述LLR执行软判决来决定所接收的信号。
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公开(公告)号：KR1020070061234A
公开(公告)日：2007-06-13
申请号：KR1020060071319
申请日：2006-07-28
Applicant: 한국전자통신연구원
CPC classification number: H04W74/0833 , H04J13/0059 , H04L7/10 , H04L27/2628 , H04L27/265 , H04L27/2655 , H04W72/0453
Abstract: A method and an apparatus for transceiving random access data in an orthogonal multiple access system are provided to stabilize an uplink transmission scheme by a channel state of a mobile terminal by supporting two sorts of carrier assignment schemes of a distributed subcarrier assignment scheme and a localized subcarrier assignment scheme. A method for transceiving random access data in an orthogonal multiple access system includes the steps of: randomly selecting a CAZAC(Constant Amplitude Zero Auto-Correlation) code to form the random access data(S610); selecting a carrier assignment scheme for mapping the CAZAC code(S620); mapping the CAZAC code into a subcarrier according to the selected subcarrier assignment scheme(S630); and fourier-transforming the subcarrier into which the CAZAC code is mapped, and transmitting the transformed subcarrier to a base station(S650). A localized subcarrier assignment scheme and a distributed subcarrier assignment scheme are selected for mapping the CAZAC code.
Abstract translation: 提供一种用于在正交多址系统中收发随机接入数据的方法和装置，用于通过支持分布式子载波分配方案和局部副载波的两种载波分配方案来稳定移动终端的信道状态的上行链路传输方案 分配方案。 一种用于在正交多址系统中收发随机接入数据的方法包括以下步骤：随机选择CAZAC（恒幅零自相关）码以形成随机接入数据（S610）; 选择用于映射CAZAC码的载波分配方案（S620）; 根据所选择的子载波分配方案将CAZAC码映射到子载波中（S630）; 并对CAZAC码映射到的子载波进行傅里叶变换，并将变换的子载波发送到基站（S650）。 选择本地化子载波分配方案和分布式子载波分配方案用于映射CAZAC码。
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