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71.发明公开
公开(公告)号：KR1020050019265A
公开(公告)日：2005-03-03
申请号：KR1020030056918
申请日：2003-08-18
Applicant: 한국전자통신연구원 , 삼성전자주식회사 , 주식회사 케이티 , 에스케이브로드밴드주식회사 , 주식회사 케이티프리텔 , 에스케이텔레콤 주식회사
IPC: H04J11/00
CPC classification number: H04L27/261 , H04L27/2607 , H04L27/2628 , H04L27/265 , H04L27/2675
Abstract: PURPOSE: A method and an apparatus for transmitting and receiving TDMA(Time Division Multiple Access)/OFDM(Orthogonal Frequency Division Multiplexing) system are provided to improve transmission speed by selecting one pilot pattern depending on terminal environment. CONSTITUTION: A pilot pattern controller(61) selects one out of plural pilot patterns and determines the number of data sub-carrier, pilot sub-carrier and the position of an input terminal of an IFFT(Inverse Fast Fourier Transform) unit(67). A serial/parallel converter(62) converts high-speed transmission data being received in serial into low-speed parallel data based on the determined number of data sub-carrier, and a pilot being received in serial into parallel based on the number of pilot sub-carrier. A modulator(64) modulates the converted data and pilot according to a predetermined modulation. A parallel/serial converter(68) converts an OFDM symbol of a parallel signal into a serial signal to output. A CP(Cyclic Prefix) is additionally inserted into the parallel signal. A D/A(Digital/Analog) conversion and filter(69) converts a digital signal into an analog signal and filters the analog signal to transmit it to a receiver(70) through the RF(Radio Frequency) terminal.
Abstract translation: 目的：提供用于发送和接收TDMA（时分多址）/ OFDM（正交频分复用））系统的方法和装置，以通过根据终端环境选择一个导频模式来提高传输速度。 构成：导频模式控制器（61）选择多个导频模式中的一个，并确定IFFT（快速傅里叶逆变换）单元（67）的数据子载波，导频子载波和输入端的位置数， 。 串行/并行转换器（62）基于所确定的数据子载波数目将基于串行接收的高速传输数据转换为低速并行数据，并且基于导频数量将串行并行接收的导频 子载波。 调制器（64）根据预定的调制来调制转换的数据和导频。 并行/串行转换器（68）将并行信号的OFDM符号转换为串行信号以输出。 CP（循环前缀）被另外插入到并行信号中。 D / A（数字/模拟）转换和滤波器（69）将数字信号转换为模拟信号，并对模拟信号进行滤波，以通过RF（射频）端子将其发送到接收器（70）。
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公开(公告)号：KR100462555B1
公开(公告)日：2004-12-17
申请号：KR1020020042942
申请日：2002-07-22
Applicant: 한국전자통신연구원
IPC: H04B1/00
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：提供一种使用信道互易的通信系统中的交错/去交错装置，以将具有高优先级的比特发送到上行链路和下行链路之间的延迟小的部分，并且将具有低优先级的比特发送到延迟为 大，从而降低了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，并分别交织区分的比特。 复用器（34）在与上行链路高度相关的部分中复用具有高优先级的编码比特，并且在与上行链路低相关的部分中复用具有低优先级的比特。 调制器（35）调制通过多路复用器（34）多路复用的比特。
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公开(公告)号：KR100423147B1
公开(公告)日：2004-03-16
申请号：KR1020010047490
申请日：2001-08-07
Applicant: 한국전자통신연구원
IPC: H04W84/16
Abstract: PURPOSE: A wireless connection device for a multimedia service and a method therefor are provided to construct a TDD(Time Division Duplex) type wireless private network in a limited area using one public communication portable phone and receive a voice telephone call and an Internet service using the wireless private network. CONSTITUTION: A channel management device(210) initializes mobile terminals(110,120,130), transmits and receives subscriber association information with the mobile terminals(110,120,130), and processes the access and paging of the mobile terminals(110,120,130). A wired network interface device(220) connects to an external network and converts a signal transmitted and received to a TDD type mobile terminal. A system control unit(230) connects to the channel management device(210) and the wired network interface device(220), processes a call, manages the registration and state of subscribers, and manages and controls each device.
Abstract translation: 目的：提供一种用于多媒体服务的无线连接装置及其方法，用于使用一个公用通信便携式电话在有限的区域内构建TDD（时分双工）型无线专用网络，并使用一个公共通信便携式电话来接收语音电话呼叫和互联网服务 无线专用网络。 组成：信道管理设备（210）初始化移动终端（110,120,130），与移动终端（110,120,130）发送和接收用户关联信息，并处理移动终端（110,120,130）的接入和寻呼。 有线网络接口设备（220）连接到外部网络并将发送和接收的信号转换为TDD型移动终端。 系统控制单元（230）连接到频道管理设备（210）和有线网络接口设备（220），处理呼叫，管理用户的注册和状态，并管理和控制每个设备。
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公开(公告)号：KR100391292B1
公开(公告)日：2003-07-12
申请号：KR1020010056132
申请日：2001-09-12
Applicant: 한국전자통신연구원
IPC: H04B7/26
Abstract: PURPOSE: A device for estimating a channel in a time division bidirectional communication system is provided to use a channel estimating method from a chip unit, a symbol unit, and a time slot, thereby minimizing an error caused during channel estimation. The device is provided to use a simple averaging method, thereby reducing random FM phenomenon caused by a channel estimating error. CONSTITUTION: A converter(100) receives a transmitted RF signal, and converts the signal into a baseband signal. A matching filter(200) filters the converted signal. A multiplier(300) multiples a signal sampled by a sampling period with chip units from the filtered signal by a midamble sequence for I and Q codes. An adder(400) adds signals as many as all midamble chips from the multiplied signal. An accumulator(500) divides the added signals as many as the number of the midamble chips, and obtains an average value. A channel estimating calculator(600) calculates a channel estimating value through consecutive two time slots or one-time slot from output values of the accumulator(500).
Abstract translation: 目的：提供一种用于在时分双向通信系统中估计信道的设备，以使用来自码片单元，码元单元和时隙的信道估计方法，从而使信道估计期间引起的误差最小化。 提供该设备以使用简单的平均方法，从而减少由信道估计误差引起的随机FM现象。 构成：A转换器（100）接收发射的RF信号，并将该信号转换成基带信号。 匹配滤波器（200）对转换后的信号进行滤波。 乘法器（300）将采样周期采样的信号与来自滤波信号的码片单元乘以用于I和Q码的中间码序列。 加法器（400）将来自乘法信号的信号与所有中间码码片一样多。 累加器（500）将所添加的信号分成与中间码码片的数量一样多的数量，并且获得平均值。 信道估计计算器（600）从累加器（500）的输出值通过连续的两个时隙或一个时隙计算信道估计值。
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公开(公告)号：KR1020030056550A
公开(公告)日：2003-07-04
申请号：KR1020010086781
申请日：2001-12-28
Applicant: 한국전자통신연구원
IPC: H04L7/00
CPC classification number: H04L1/0003 , H04L1/0026
Abstract: PURPOSE: A rate matching apparatus of a data communication system and a method thereof are provided to match channel-encoded symbols with a transmission rate appropriate for a physical layer to transmit. CONSTITUTION: According to the rate matching apparatus in a digital communication system, a channel encoder unit(220) performs a channel encoding as to input information bits. A multiplexer unit(260) performs a time division multiplexing as to symbols channel-encoded by the above channel encoder unit regularly. A parameter converter unit(1440) provides input parameter value required in the transmission rate matching. And a transmission rate matching unit(1430) reproduces symbols as much as appropriate for a physical layer by puncturing or repetition as to multiplexed channel encoded symbols and then matches them with a transmission rate appropriate for the physical layer to transmit, according to the above input parameter value.
Abstract translation: 目的：提供一种数据通信系统的速率匹配装置及其方法，以将信道编码符号与适于物理层传输的传输速率相匹配。 构成：根据数字通信系统中的速率匹配装置，信道编码器单元（220）对输入信息比特执行信道编码。 多路复用器单元（260）对由上述频道编码器单元定期频道编码的符号执行时分复用。 参数转换器单元（1440）提供传输速率匹配中所需的输入参数值。 并且传输速率匹配单元（1430）根据多路复用的信道编码符号对穿孔或重复的物理层进行适当的再现符号，然后根据上述输入，以适合于物理层的传输速率匹配它们 参数值。
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Patent Agency Ranking
公开(公告)号：KR100226428B1
公开(公告)日：1999-10-15
申请号：KR1019970031129
申请日：1997-07-04
Applicant: 한국전자통신연구원
IPC: H04L5/02
Abstract: 본 발명은 DS-CDMA 시스템에서 시그널링 활성도를 이용한 병렬 시그널링 채널구조 및 구분방법에 관한 것으로서, 시그널링 채널을 다른 채널들에 대해 병렬화하여 그 채널들과 구분하는 방법을 순방향 및 역방향 모두에 제시하고, 시그널링 활성도를 이용할 때의 전송 방법을 제시함으로써, 향후 서비스가 다양화되어 시그널링 데이터가 빈번하게 발생하는 이동통신 환경하에서 서비스의 품질을 떨어뜨리지 않고, 시그널링 데이터를 원활히 전송할 수 있으므로, 차세대 이동통신 시스템에 이용할 수 있는 효과를 가진다.
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公开(公告)号：KR1019990053173A
公开(公告)日：1999-07-15
申请号：KR1019970072764
申请日：1997-12-23
Applicant: 한국전자통신연구원
IPC: H04W88/06
Abstract: 본 발명은 고속 데이터 통신용 멀티 밴드 코드분할 다중 접속(CDMA) 장치에 관한 것이다.
종래 무선접속 방식인 IS-95 based DCN 혹은 PCS방식에서는 하나의 대역인1.25MHz으로서 가능한 데이터 전송율은 최대 14.4Kbps이하이다. 그리고, Interdigital/OKI사에서 제안한 광대역 CDMA 방식은 단일 대역을 이용하여 최대 64Kbps까지의 데이터를 전송하고 있다. 그러나, 제 3세대 이동통신시스템에서는 최대 2Mbps까지의 데이터 서비스를 요구하고 있다.
본 발명은 1.8GHz ~ 2GHz 대역의 제 3세대 이동통신시스템에서 개인국과 기지국간의 무선 구간에서 최대 2Mbps까지의 데이터를 전송하는 멀티 밴드 CDMA구조이다. -
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