-
公开(公告)号：KR1020090115691A
公开(公告)日：2009-11-05
申请号：KR1020090038675
申请日：2009-05-01
Applicant: 한국전자통신연구원
CPC classification number: H04L5/0023 , H04L5/003
Abstract: PURPOSE: A frequency diversity transmission/reception apparatus and a method thereof capable of transmitting data without reduction by a transceiving antenna are provided to obtain diversity gain of frequency without reducing transfer rate of the data. CONSTITUTION: A data combination unit(200) receives data signals from encoded bitstream. The data combination unit assembles the received data signal. A sub carrier allocation unit(210) allocates the symbol to the subcarrier. The symbols are mapped in subcarrier which is adjacent to the symbols. The diversity properties of the frequency are obtained without transmitting symbols.
Abstract translation: 目的：提供一种频率分集发送/接收装置及其能够通过收发天线发送数据而不减少的方法，以在不降低数据传送速率的情况下获得频率的分集增益。 构成：数据组合单元（200）从编码比特流接收数据信号。 数据组合单元组合接收到的数据信号。 子载波分配单元（210）将符号分配给副载波。 符号被映射在与符号相邻的子载波中。 在不发送符号的情况下获得频率的分集特性。
-
公开(公告)号：KR1020090065235A
公开(公告)日：2009-06-22
申请号：KR1020070132713
申请日：2007-12-17
Applicant: 한국전자통신연구원 , 부산대학교 산학협력단
IPC: H03D7/00
Abstract: A microwave and a millimeter-wave CMOS mixer is provided to reduce a noise generated in a broadband by low maintaining a current inputted to a switching part. A transconductor part(110) amplifies an input signal. The transconductor part obtains transconductance of two times in the same current by using two MOSs(Metal Oxide Semiconductor) of an NMOS and a PMOS at the same time. A switching part(120) outputs a downstream frequency signal by mixing a signal applied to a third node(N3) to a signal applied to a local oscillation input terminal. A capacitor(CD) separates the transconductor part from the switching part by blocking DC component applied between the transconductor part and the switching part. A current source(IB) is provided in order to reduce a noise of the switching part by low maintaining a current applied to the switching part through the third node.
Abstract translation: 提供微波和毫米波CMOS混频器以通过低维持输入到开关部分的电流来减少宽带中产生的噪声。 跨导部分（110）放大输入信号。 跨导体部分通过同时使用NMOS和PMOS的两个MOS（金属氧化物半导体），在相同的电流中获得两倍的跨导。 开关部件（120）通过将施加到第三节点（N3）的信号与施加到本地振荡输入端子的信号混合来输出下行频率信号。 电容器（CD）通过阻挡施加在跨导体部分和开关部分之间的直流分量来将跨导体部分与开关部分分离。 提供电流源（IB），以便通过低维持通过第三节点施加到开关部件的电流来减小开关部件的噪声。
-
公开(公告)号：KR1020090065229A
公开(公告)日：2009-06-22
申请号：KR1020070132707
申请日：2007-12-17
Applicant: 한국전자통신연구원
Abstract: A directional antenna and a transmitter-receiver employing the same are provided to adjust a feeder of signals in order to obtain a desired beam direction. A directional antenna comprises a feeder(32), a radiator and a via. The feeder is symmetrically arranged on a substrate(31). The radiator is arranged on the end part of the feeder. The via connects the feeder to the radiator. The bilateral symmetry degree of the feeder is adjusted in order to control the direction of beam which is radiated through the radiator. A device made of conductive materials is additionally contained in order to reduce grating lobe of the beam while surrounding the feeder, radiator and the via.
Abstract translation: 提供定向天线和采用该定向天线的发射机 - 接收机，以调整信号馈线以便获得期望的波束方向。 定向天线包括馈线（32），散热器和通孔。 馈送器对称地布置在基板（31）上。 散热器布置在进料器的末端部分。 通道将进料器连接到散热器。 为了控制通过散热器辐射的光束的方向，调整馈线的双边对称度。 另外包含由导电材料制成的器件，以便在围绕馈线，辐射器和通孔的同时减小光束的光栅。
-
公开(公告)号：KR1020090059824A
公开(公告)日：2009-06-11
申请号：KR1020070126877
申请日：2007-12-07
Applicant: 한국전자통신연구원
CPC classification number: H04W16/14 , H04W48/12 , H04W72/02 , H04W74/004 , H04W84/18
Abstract: A beacon retransmission device using EBS in mobile network, a beacon retransmission method and an initial connection method are provided to share frequency allocation between networks by using EBP and use the frequency allocation efficiently. A beacon frame receiver(210) receives a beacon frame from a management server managing mobile network. The beacon frame comprises the beacon information for the communications in the mobile network and EBS(Echo Beacon Slot) information. The EBS information indicates EBS(Echo Beacon Slot) allocated for the beacon retransmission among the time slots of the super frame. A beacon retransmitter(220) retransmits the Beacon information for EBS.
Abstract translation: 提供了一种在移动网络中使用EBS的信标重传装置，信标重发方法和初始连接方法，以通过使用EBP共享网络之间的频率分配并且有效地使用频率分配。 信标帧接收机（210）从管理移动网络的管理服务器接收信标帧。 信标帧包括用于移动网络中的通信的信标信息和EBS（回波信标时隙）信息。 EBS信息表示在超帧的时隙中分配用于信标重传的EBS（回波信标时隙）。 信标转发器（220）重传EBS的信标信息。
-
公开(公告)号：KR100865087B1
公开(公告)日：2008-10-24
申请号：KR1020070054563
申请日：2007-06-04
Applicant: 한국전자통신연구원
Abstract: 본 발명은 스위칭 빔 형성 장치에 관한 것으로서, 다수의 지향성을 갖는 다수개의 안테나소자와, 다수개의 안테나소자로부터 수신된 신호를 다수개의 독립적인 빔으로 분리하여 출력시키는 스위칭 빔 형성 회로와; 빔 형성 회로를 통과한 신호 중 원하는 신호가 아닌 나머지 N-1개의 경로의 신호를 연결된 저항으로 연결시키는 다수의 스위치와; 스위칭 빔 형성회로에서 출력된 후 스위치와 저항으로 연결되지 않은 하나의 지향된 신호만을 수신하여 로컬오실레이터에서 출력된 신호와 혼합하는 다수의 주파수 변환기와, 하나의 지향된 신호만을 수신하여 복호화하는 복호부 및 기저대역부로 구성되므로, 신호의 격리도를 충분히 높일 수 있으며, 또한, 증폭기는 임피던스 정합 회로로써만 동작하면 되므로, 임피던스의 값이 최대한 유지되도록 하면서, 전력 소모를 줄일 수 있도록 하여 시스템의 효율 및 신호대잡음비가 개선되고, 신호의 격리도 특성이 향상된 효과가 있다.
스위칭, 빔, 버틀러 메트릭스, 안테나,-
Patent Agency Ranking
公开(公告)号：KR1020080094629A
公开(公告)日：2008-10-23
申请号：KR1020080036570
申请日：2008-04-21
Applicant: 한국전자통신연구원
CPC classification number: H04L27/2601 , H04L5/0048 , H04L27/2613 , H04L27/2656 , H04L27/2602 , H04L27/18 , H04L27/2628
Abstract: A method and an apparatus of generating a signal for an initial ranging in an OFDMA(Orthogonal Frequency Division Multiple Access) system are provided to simply generate plural symbols with continuous phases irrespective of the number of symbol for the initial ranging by using a single mathematical equation. A ranging code generator(308) generates a ranging code. A ranging channel generator(310) modulates the ranging code and generates L symbols by phase-rotating the modulated ranging codes according to a symbol index and a sub-carrier index. The ranging channel generator maps the symbols on a constellation to the sub-carrier according to an index of the sub-carrier. A converter converts the mapped symbols into a time domain and generates sample data of the ranging symbol. A guard interval insertion unit(304) copies a tail portion of the sample data corresponding to the size of the guard interval, and inserts the copied portion in front of the sample data as the guard interval, such that the initial ranging signal is formed.
Abstract translation: 提供了一种在OFDMA（正交频分多址）系统中生成用于初始测距的信号的方法和装置，以简单地生成具有连续相位的多个符号，而不管初始测距的符号数量如何，通过使用单个数学方程 。 测距码发生器（308）生成测距码。 测距信道生成器（310）通过根据符号索引和子载波索引相位旋转调制的测距码来调制测距码并产生L个符号。 测距信道发生器根据子载波的索引将星座上的符号映射到子载波。 A转换器将映射符号转换为时域并生成测距符号的采样数据。 保护间隔插入单元（304）将对应于保护间隔的大小的样本数据的尾部复制，并将复制部分插入样本数据前面作为保护间隔，使得形成初始测距信号。
-
公开(公告)号：KR100846872B1
公开(公告)日：2008-07-16
申请号：KR1020070078569
申请日：2007-08-06
Applicant: 한국전자통신연구원
Abstract: 본 발명은 유전체 도파관 대 전송선의 밀리미터파 천이 장치에 관한 것으로, 유전체 도파관과 전송선과 슬롯을 이용한 밀리미터파 천이 구조를 구현하여 저손실로 신호를 천이시킬 수 있는, 유전체 도파관 대 전송선의 밀리미터파 천이 장치를 제공하고자 한다.
이를 위하여, 본 발명은 밀리미터파 천이 장치에 있어서, 최상위 유전체기판 상부에 신호 천이 방향을 따라 입력단과 출력단에 각각 배치되어 신호를 천이시키기 위한 전송선; 최하위 유전체기판의 상하부 접지면과 상기 신호 천이 방향을 따라 배치된 비아열에 의해 형성되어 신호 천이 경로가 되는 유전체 도파관; 및 각 유전체기판의 상부 접지면의 신호 천이 경로 상에 각각 배치되며, 상기 전송선 및 상기 유전체 도파관을 결합시켜, 입력단 전송선으로부터 입력된 신호를 상기 유전체 도파관을 경유하여 출력단 전송선으로 천이시키기 위한 슬롯을 포함한다.
밀리미터파, 천이 구조, 유전체 도파관, 전송선, 슬롯, 매칭패드, 중간 비아, 비아벽-
128.发明公开
公开(公告)号：KR1020070104865A
公开(公告)日：2007-10-29
申请号：KR1020070040013
申请日：2007-04-24
Applicant: 한국전자통신연구원
IPC: H04L27/26
CPC classification number: H04W72/0406 , H04L5/0007 , H04L5/0048
Abstract: A method of generating a pilot pattern for adaptive channel estimation, a method of transmitting and receiving using the pilot pattern and an apparatus thereof are provided to minimize channel estimation performance degradation due to interpolation under severe channel environment as maintaining low pilot density. According to a method of generating a pilot pattern for adaptive channel estimation, the size of a slot where the pilot pattern is repeated in a time domain and a frequency domain is determined(S301). A random subcarrier in a first OFDMA(Orthogonal Frequency Division Multiple Access) symbol in the time domain slot is determined as a pilot insertion position(S303). Frequency-time distance from pilots of all prior OFDMA symbols in the time domain slot to each remaining sub carrier is calculated, as to each remaining sub carrier of the present OFDMA symbol after the first OFDMA symbol in the time domain slot(S304). Minimum distance in each frequency-time distance assembly of the remaining subcarriers is compared. A subcarrier where the frequency-time minimum distance has a maximum value is determined as pilot insertion position(S312).
Abstract translation: 提供一种生成用于自适应信道估计的导频模式的方法，使用该导频模式的发送和接收方法及其装置，以使由于在严格信道环境下的内插而导致的信道估计性能劣化保持低导频密度。 根据生成用于自适应信道估计的导频模式的方法，确定导频模式在时域和频域中重复的时隙的大小（S301）。 在时域时隙中的第一OFDMA（正交频分多址）符号中的随机子载波被确定为导频插入位置（S303）。 对于时隙中的第一OFDMA符号之后的OFDMA符号的每个剩余子载波，计算从时隙中的所有先前的OFDMA符号的导频到每个剩余子载波的频率 - 时间（S304）。 比较剩余子载波的每个频率 - 时间距离组合中的最小距离。 将频率 - 时间最小距离具有最大值的副载波确定为导频插入位置（S312）。
-
公开(公告)号：KR1020070076538A
公开(公告)日：2007-07-24
申请号：KR1020070005448
申请日：2007-01-17
Applicant: 한국전자통신연구원
IPC: H03M13/11
CPC classification number: H03M13/1148 , H03M13/6502
Abstract: An apparatus and a method for generating jacket LDPC(Low Density Parity Check) codes of a Richardson type are provided to constitute an encoder with simple hardware by reducing the complexity of calculating the LDPC codes. An apparatus for generating jacket LDPC codes of a Richardson type includes a jacket pattern generating unit(400), an encoding-rate/encoding-length control unit(410), a zero padding/canceling unit(430), a CPM(Circulant Permutation Matrix) inserting unit(420), and an H matrix generating unit(440). The jacket pattern generating unit(400) generates a jacket matrix based on a jacket pattern in which an inverse matrix of a square matrix is represented as the inverse of each element. The encoding-rate/encoding-length control unit(410) outputs a prime number, which determines the size of CPM based on the size of the jacket matrix generated in the jacket pattern generating unit(400), to satisfy a requested encoding rate. The zero padding/canceling unit(430) inserts zero into the jacket matrix generated in the jacket pattern matrix, and generates a non-square matrix. The CPM inserting unit(420) generates a first CPM of a unit matrix which only has diagonal factors based on the prime number outputted in the encoding-rate/encoding-length control unit(410), and generates all second CPMs by shifting the first CPM corresponding to each factor of the jacket matrix. The H matrix generating unit(440) generates an H matrix of a Richardson type based on the non-square jacket matrix and the second CPM.
Abstract translation: 提供了一种用于产生理查森类型的封套LDPC（低密度奇偶校验）码的装置和方法，以通过降低计算LDPC码的复杂度来构成具有简单硬件的编码器。 一种用于产生理查森型护套LDPC码的装置，包括：外壳图案生成单元（400），编码率/编码长度控制单元（410），零填充/取消单元（430），CPM（循环排列 矩阵）插入单元（420）和H矩阵生成单元（440）。 护套图案生成单元（400）基于其中矩形矩阵的逆矩阵被表示为每个元素的倒数的封套图案来生成封套矩阵。 编码率/编码长度控制单元（410）输出素数，其基于在套衫图案生成单元（400）中生成的外套矩阵的大小来确定CPM的尺寸，以满足所请求的编码率。 零填充/取消单元（430）将零插入到在套管图案矩阵中生成的套管矩阵中，并且生成非正方形矩阵。 CPM插入单元（420）生成单位矩阵的第一CPM，该单位矩阵仅基于在编码率/编码长度控制单元（410）中输出的质数而具有对角因子，并且通过将第一CPM CPM对应于夹套矩阵的每个因子。 H矩阵生成单元（440）基于非正方形外壳矩阵和第二CPM生成理查森型的H矩阵。
-
公开(公告)号：KR1020070041343A
公开(公告)日：2007-04-18
申请号：KR1020060098640
申请日：2006-10-10
Applicant: 한국전자통신연구원
CPC classification number: H04W16/14 , H04B1/715 , H04W16/10 , H04W72/042 , H04W72/06 , H04W72/085 , H04W72/10
Abstract: Provided is a method of assigning a frequency channel using efficient spectrum sensing in a multiple Frequency Assignment (FA) system. The method includes a channel sensing process, wherein a base station (BS) of a secondary user classifies multiple frequency channels licensed to a primary user into a plurality of channel state sets according to usage states, periodically senses channel states by changing a sensing period according to the types of classified channel state sets, and manages the sensed channel states as frequency channel state set information; a channel state set broadcasting process, wherein the BS transmits the frequency channel state set information manage d in the channel sensing process to secondary user terminals using a broadcast message; and a channel assigning process, wherein if the BS receives a channel assignment request message from a new secondary user terminal which has received the broadcast message, the BS assigns an unused frequency channel from among frequency channels licensed to the primary user to the new secondary user terminal using the frequency channel state set information. Accordingly, a frequency channel can be assigned to a secondary user requesting channel assignment using frequency channel state set information without a primary user experiencing interference noise.
-
-
-
-
-
-
-
-
-
Search Results
233
records
(took 0.06 seconds)
