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公开(公告)号：KR1020110057966A
公开(公告)日：2011-06-01
申请号：KR1020090114612
申请日：2009-11-25
Applicant: 한국전자통신연구원
Inventor： 이문식
IPC: H04B7/08
CPC classification number: H04B7/086 , H04B7/0897
Abstract: PURPOSE: A method for performing wireless communication using plane and linear antenna arrays is provided to estimate a moving parameter of a moving object at the same time. CONSTITUTION: A receiver(14) creates a mixed signal by mixing a received reflection signal through a reception antenna selecting unit and a transmitting signal. The receiver coverts the mixed signal into a digital signal. A controller(17) forms beam about the converted mixed signal. The controller estimates a moving parameter about the moving object.
Abstract translation: 目的：提供一种使用平面和线性天线阵列执行无线通信的方法，用于同时估计移动物体的移动参数。 构成：接收器（14）通过将接收到的反射信号通过接收天线选择单元和发送信号混合而产生混合信号。 接收机将混合信号覆盖为数字信号。 控制器（17）围绕转换的混合信号形成光束。 控制器估计关于移动物体的运动参数。
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公开(公告)号：KR100921777B1
公开(公告)日：2009-10-15
申请号：KR1020080064202
申请日：2008-07-03
Applicant: 한국전자통신연구원
CPC classification number: H04W56/00 , H04J11/0069 , H04J11/0076 , H04L25/03866 , H04L27/2613 , H04L27/2655 , H04L27/2656 , H04L27/2657 , H04L27/2662
Abstract: 본 발명은 하향링크 프레임 생성 방법에 관한 것으로 셀 그룹 정보를 나타내는 제1 쇼트 시퀀스 및 제2 쇼트 시퀀스를 생성하고, 제1 동기 신호에 의해 결정되는 제1 스크램블링 시퀀스를 생성하고, 상기 제1 쇼트 시퀀스에 의해 결정되는 제2 스크램블링 시퀀스 및 상기 제2 쇼트 시퀀스에 의해 결정되는 제3 스크램블링 시퀀스를 생성하고, 상기 제1 쇼트 시퀀스를 상기 제1 스크램블링 시퀀스로 스크램블링하고, 상기 제2 쇼트 시퀀스를 적어도 상기 제2 스크램블링 시퀀스로 스크램블링하고, 상기 제2 쇼트 시퀀스를 상기 제1 스크램블링 시퀀스로 스크램블링하고, 상기 제1 쇼트 시퀀스를 적어도 상기 제3 스크램블링 시퀀스로 스크램블링하고, 상기 제1 스크램블링 시퀀스로 스크램블링된 제1 쇼트 시퀀스 및 상기 적어도 제2 스크램블링 시퀀스로 스크램블링된 제2 쇼트 시퀀스를 포함하는 하나의 제2 동기신호와 상기 제1 스크램블링 시퀀스로 스크램블링된 제2 쇼트 시퀀스 및 상기 적어도 제3 스크램블링 시퀀스로 스크램블링된 제1 쇼트 시퀀스를 포함하는 다른 하나의 제2 동기 신호를 주파수 영역에 매핑한다.
동기 채널, 셀 ID, 동기 채널 스크램블링, 셀탐색-
公开(公告)号：KR1020090010321A
公开(公告)日：2009-01-30
申请号：KR1020070073319
申请日：2007-07-23
CPC classification number: H04L27/261 , H04B1/713 , H04L27/2628 , H04W74/0833
Abstract: An apparatus and a method for generating preamble and an apparatus and a method for detecting a channel response are provided to reduce hardware and a processing time by generating the preamble by using an interpolator and detecting the channel response by using a decimator. A sequence generation part generates a frequency sequence including a plurality of factors in a frequency domain(S110). An IDFT operating part performs an IDFT(Inverse Discrete Fourier Transform) of the frequency sequence generated by the sequence generation part and produces the inverse Fourier transform signal(S120). A protective interval insertion part inserts the protective interval into the inverse Fourier transform signal and produces the protective interval insertion signal(S130). An interpolator performs the interpolation of the protective interval insertion signal and produces an RA preamble(S140). The frequency band of the RA preamble which the interpolator produces is positioned in the base band. A frequency hopping part produces frequency hopped RA preamble by moving the RA preamble of the base band to the frequency band to be transmitted(S150). A transmission part transmits the frequency-hopped RA preamble which the frequency hopping part produces to the channel response detecting device through the channel(S160).
Abstract translation: 提供了一种用于产生前导码的装置和方法，以及用于检测信道响应的装置和方法，以通过使用内插器生成前导码并通过使用抽取器来检测信道响应来减少硬件和处理时间。 序列生成部生成频域中包含多个因子的频率序列（S110）。 IDFT操作部分执行由序列生成部分生成的频率序列的IDFT（离散傅里叶逆变换），并产生傅里叶逆变换信号（S120）。 保护间隔插入部将保护间隔插入到傅里叶逆变换信号中，产生保护间隔插入信号（S130）。 内插器执行保护间隔插入信号的插值并产生RA前导码（S140）。 内插器产生的RA前导码的频带位于基带中。 跳频部分通过将基带的RA前导码移动到要发送的频带来产生跳频的RA前导码（S150）。 发送部通过频道向频道响应检测装置发送跳频部产生的跳频的前导码（S160）。
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公开(公告)号：KR1020090006763A
公开(公告)日：2009-01-15
申请号：KR1020080066782
申请日：2008-07-10
Applicant: 한국전자통신연구원
CPC classification number: H04W56/00 , H04J11/0069 , H04J11/0076 , H04L25/03866 , H04L27/2613 , H04L27/2655 , H04L27/2656 , H04L27/2657 , H04L27/2662 , H04W48/16
Abstract: A method for generating a downlink frame and a cell search method are provided to equalize the inter-sector interference. A sequence generation part produces the first shot sequence for showing cell group information and the second short sequence(S510), generates the first scrambling sequence determined by the first synchronous signal, and then produces the second scrambling sequence decided by the group to which the first shot sequence belongs. A wireless communication system uses a plurality of short sequences and a plurality of short sequences are divided into a plurality of groups. A frequency mapping part makes the first shot sequence to the first scrambling sequence, and then makes the second short sequence into the second scrambling sequence(S530,S540).
Abstract translation: 提供一种生成下行链路帧的方法和小区搜索方法以均衡扇区间干扰。 序列产生部分产生用于显示小区组信息的第一个播放序列和第二个短序列（S510），产生由第一同步信号确定的第一个加扰序列，然后产生由第一个 射击序列属于。 无线通信系统使用多个短序列，并且将多个短序列分成多个组。 频率映射部分使第一个播放序列到第一个加扰序列，然后使第二个短序列进入第二个加扰序列（S530，S540）。
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公开(公告)号：KR1020080093280A
公开(公告)日：2008-10-21
申请号：KR1020070037004
申请日：2007-04-16
Applicant: 한국전자통신연구원
CPC classification number: H04W74/0833 , H04B1/707 , H04L5/0032 , H04L5/0053
Abstract: A receiver and a method for detecting random access preambles in a mobile communication system are provided to make it possible to detect the random access preambles in one preamble sequence and repeatable for each repeated preamble sequence, for each receiving antenna or for each receiving path. A method for detecting random access preambles in a mobile communication system includes the following several steps. A CP(Cyclic Prefix) eliminator eliminates CPs included at signals received from plural receiving antennas(S100,S110). The first DFT operator converts the received signals into frequency domain signals(S120) and a subcarrier demapping unit extracts one preamble and repeated preamble(S130). Multiplication operators multiply the extracted preambles by complex conjugate(S140). An IFFT(Inverse Fast Fourier Transform) operator converts the outputs of the multiplication operators into time domain signals(S150). Power calculation units calculate power by using the converted signals(S160). A non-coherent combining unit adds plural interrelation power values into one interrelation power information(S170). A peak detector detects the largest power value(S180). The peak detector compares the detected largest power value with a preset reference(S190). If the detected largest power value is larger than the preset reference, the peak detector outputs time offset information matched with the largest power value, and preamble sequence information of a detector engine which detected the preambles with respect to a power value(S200). In case the detected largest power value is smaller than the preset reference, any other information is not outputted(S210).
Abstract translation: 提供了一种用于检测移动通信系统中的随机接入前同步码的接收机和方法，以便可以检测一个前同步码序列中的随机接入前同步码，并针对每个接收天线或每个接收路径对每个重复的前同步码序列进行重复。 一种在移动通信系统中检测随机接入前导码的方法包括以下几个步骤。 CP（循环前缀）消除器消除了从多个接收天线接收的信号中包括的CP（S100，S110）。 第一DFT操作者将接收到的信号转换为频域信号（S120），并且副载波解映射单元提取一个前同步码和重复前导码（S130）。 乘法运算符将提取的前导乘以复共轭（S140）。 IFFT（逆快速傅里叶变换）算子将乘法运算符的输出转换为时域信号（S150）。 功率计算单元使用转换后的信号计算功率（S160）。 非相干组合单元将多个相关功率值添加到一个相关功率信息中（S170）。 峰值检测器检测最大功率值（S180）。 峰值检测器将检测到的最大功率值与预设参考值进行比较（S190）。 如果检测到的最大功率值大于预设参考值，则峰值检测器输出与最大功率值匹配的时间偏移信息，以及相对于功率值检测到前导码的检测器引擎的前导序列信息（S200）。 在检测到的最大功率值小于预设参考值的情况下，不输出任何其他信息（S210）。
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Patent Agency Ranking
公开(公告)号：KR1020080064748A
公开(公告)日：2008-07-09
申请号：KR1020080001424
申请日：2008-01-04
CPC classification number: H04L27/2607 , H04L69/323 , H04W74/006 , H04L29/02 , H04W74/0833
Abstract: A random access preamble structure is provided to realize frequency domain at a receiving end through by maintaining preamble sequence used in base preamble equally and extending a CP(cyclic prefix) corresponded to the maximum round trip delay time according to extended cell radius. A method for generating a random access preamble in an extended cell environment comprising: generating a CP(cyclic prefix) which is the sum of a maximum delay spread and the maximum round trip delay time according to the extended cell radius; generating a preamble sequence part.
Abstract translation: 提供随机接入前同步码结构，通过在前同步码中平均维持前同步码序列，根据扩展的小区半径扩展对应于最大往返行程延迟时间的CP（循环前缀）来实现接收端的频域。 一种用于在扩展小区环境中生成随机接入前同步码的方法，包括：根据所述扩展小区半径，生成最大延迟扩展和最大往返延迟时间之和的CP（循环前缀）; 生成前导序列部分。
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公开(公告)号：KR1020080064716A
公开(公告)日：2008-07-09
申请号：KR1020070135233
申请日：2007-12-21
CPC classification number: H04W74/0833 , H04L5/0007 , H04W28/20 , H04W72/02 , H04W72/0453
Abstract: A random access channel allocation method for a scalable bandwidth and a random access method and apparatus are provided to map to time and frequency resources of a random access channel. A terminal compares a reception bandwidth of a base station and a transmission bandwidth of the terminal(S710). If the reception bandwidth of the base station is larger than that of the terminal, the terminal selects one of left and right regions based on a central frequency of the reception band and determines it as a transmission band(S730). The terminal selects one of random access channels allocated to a reception band corresponding to the determined transmission band(S750) and transmits a random access preamble to the selected random access channel(S790).
Abstract translation: 提供了用于可扩展带宽的随机接入信道分配方法和随机接入方法和装置，以映射到随机接入信道的时间和频率资源。 终端比较基站的接收带宽和终端的发送带宽（S710）。 如果基站的接收带宽大于终端的接收带宽，则终端基于接收频带的中心频率选择左右区域中的一个，并将其确定为传输频带（S730）。 终端选择分配给与确定的传输频带相对应的接收频带的随机接入信道之一（S750），并将随机接入前导码发送到所选择的随机接入信道（S790）。
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公开(公告)号：KR100789784B1
公开(公告)日：2007-12-28
申请号：KR1020060125161
申请日：2006-12-08
Applicant: 한국전자통신연구원
CPC classification number: H04W72/0406 , H04B1/30 , H04B1/406
Abstract: A receiving device for supporting scalable bandwidths and a method thereof are provided to control bandwidths by using a scalable LPF(Low Pass Filter), and to control sampling frequencies of an A/D(Analog to Digital) converter, thereby supporting the scalable bandwidths. A BPF(Band Pass Filter)(202) filters receiving RF(Radio Frequency) signals. An LO(Local Oscillator)(204) oscillates frequencies to output LO frequencies. A mixer(203) down-converts the RF signals by using the LO frequencies. A scalable LPF(205) filters the down-converted signals as controlling bandwidths. An AGC(Automatic Gain Control) unit(206) controls gains of the filtered signals. An A/D converter(207) converts analog signals of the AGC unit(206) into digital signals by using sampling frequencies suitable for the corresponding bandwidths. A controller(208) demodulates the digital signals, outputs a central frequency control signal to the LO(204) according to control information of an upper layer, outputs a bandwidth control signal to the scalable LPF(205), and outputs an ADC control signal to the A/D converter(207).
Abstract translation: 提供用于支持可扩展带宽的接收设备及其方法，以通过使用可扩展LPF（低通滤波器）来控制带宽，并且控制A / D（模/数）转换器的采样频率，从而支持可扩展带宽。 BPF（带通滤波器）（202）滤波接收RF（射频）信号。 LO（本地振荡器）（204）振荡频率以输出LO频率。 混频器（203）通过使用LO频率对RF信号进行下变频。 可缩放LPF（205）将下变频信号作为控制带宽进行滤波。 AGC（自动增益控制）单元（206）控制滤波信号的增益。 A / D转换器（207）通过使用适合相应带宽的采样频率将AGC单元（206）的模拟信号转换为数字信号。 控制器（208）对数字信号进行解调，根据上层的控制信息向LO（204）输出中心频率控制信号，向可伸缩LPF（205）输出带宽控制信号，并输出ADC控制信号 到所述A / D转换器（207）。
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公开(公告)号：KR100758307B1
公开(公告)日：2007-09-12
申请号：KR1020060089271
申请日：2006-09-14
Applicant: 한국전자통신연구원
IPC: H04L27/26
CPC classification number: H04L27/265 , H04B7/0617 , H04B7/08 , H04L27/01 , H04L27/2695
Abstract: A receiving apparatus of a SC-FDMA(Single Carrier-Frequency Division Multiple Access) communication system is provided to realize an SBF(Switched Beam Former) in real-time by simplifying the structure of the SBF and reducing complexity. A receiving apparatus of a SC-FDMA communication system includes a preprocessing unit(230). At least one preprocessing unit(230) converts a series signal without a CP(Cyclic Prefix) into a data symbol signal in a frequency area to demap the converted data symbol signal to a subcarrier after converting the series signal without the CP into a parallel signal. At least one beam forming unit applies a beam weight vector to each data symbol signal demapped from the preprocessing unit(230). At least one channel presuming unit presumes each channel using a pilot signal among the signals outputted from the preprocessing unit(230). At least one frequency equalizer unit compensates for the corresponding data symbol signal which the beam weight vector of the beam forming unit is applied to at the frequency area using each channel presuming value presumed from the channel presuming unit. A beam coupling unit(210) couples the data symbol signal compensated from the frequency equalizer unit by the subcarrier. An IDFT(Interleaved FDMA) processing unit(211) processes the data symbol signal coupled from the beam coupling unit(210) with IDFT.
Abstract translation: 提供SC-FDMA（单载波 - 频分多址）通信系统的接收装置，通过简化SBF的结构并降低复杂度来实时实现SBF（交换波束形成器）。 SC-FDMA通信系统的接收装置包括预处理单元（230）。 至少一个预处理单元（230）将没有CP（循环前缀）的串联信号转换成频率区域中的数据符号信号，以便在将没有CP的串行信号转换成并行信号之后将转换的数据符号信号解映射到子载波 。 至少一个波束形成单元对从预处理单元（230）解映射的每个数据符号信号应用波束权重向量。 至少一个信道推定单元在从预处理单元（230）输出的信号中使用导频信号来假设每个信道。 至少一个频率均衡器单元使用从信道推定单元推定的每个信道推定值来补偿波束形成单元的波束权重向量在频率区域被应用的相应数据符号信号。 光束耦合单元（210）将从频率均衡器单元补偿的数据符号信号耦合子载波。 IDFT（交错FDMA）处理单元（211）使用IDFT处理从光束耦合单元（210）耦合的数据符号信号。
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公开(公告)号：KR1020070052654A
公开(公告)日：2007-05-22
申请号：KR1020060091405
申请日：2006-09-20
Applicant: 한국전자통신연구원 , 주식회사 케이티 , 에스케이텔레콤 주식회사
CPC classification number: H04B7/061 , H04L1/06 , H04L1/1893 , H04L5/0023 , H04L5/0044
Abstract: 본 발명은 OFDMA에서 패킷 데이터 전송 방법 및 장치에 관한 것이다.
이를 위하여 본 발명은 채널 정보 추정을 위한 RACH 버스트를 생성한 뒤, 복수의 안테나 중 제1 안테나를 선택하여 RACH 버스트를 기지국으로 전송하고, 기지국으로부터 전송된 RACH 버스트에 대한 데이터 전송 허용 여부 신호를 수신하며, 데이터 전송에 대한 허용 신호가 수신되면, 제1 안테나를 이용하여 사용자 패킷 데이터를 전송하고, 데이터 전송에 대한 불허 신호가 수신되면, 제1 안테나 이외의 제2 안테나를 재선택하고, 제2 안테나를 이용하여 RACH 버스트를 전송하는 복수의 안테나를 포함하여 사용자 패킷 데이터를 전송하는 방법 및 이동국 송신기를 제공한다.
본 발명에 의하면, LTE가 적용된 OFDM 시스템에서 다수의 안테나를 포함하는 이동국을 이용하여 RACH 버스트 및 사용자 패킷 데이터를 전송하므로, 높은 대역폭 및 전송 속도를 통한 데이터 전송이 가능하며, 데이터 전송시 발생할 수 있는 딥 페이 구간을 줄임으로써, 통화 단절 방지 및 데이터 전송 성능 향상의 효과를 기대할 수 있다.
DFS-S-OFDMA, 다이버시티, Random Access, RACH, LTE
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