公开(公告)号：KR100458440B1

公开(公告)日：2004-11-26

申请号：KR1020010086467

申请日：2001-12-28

Applicant: 한국전자통신연구원

Inventor： 이승준 ,  조용훈 ,  이호진 ,  안재영 ,  진광자 ,  정훈 ,  유준규

IPC: H04L27/22

Abstract: PURPOSE: A symbol timing estimation apparatus according to carrier frequency variation range and a method thereof are provided to estimate symbol timing using an output signal of a matching filter when a carrier frequency variation is small and to estimate it using an input signal of the matching filter when the carrier frequency variation is large. CONSTITUTION: According to the symbol timing estimation apparatus, a filtering unit(100) filters a sampling signal. An information generation unit(210) generates a control signal to determine whether to use an output signal of a signal selection unit(200) as the sampling signal or as a filtering signal from the filtering unit, according to the variation range of a received carrier frequency. The signal selection unit outputs one of the sampling signal and the filtering signal selectively, according to the control signal. And a symbol timing estimation unit(110) estimates the symbol timing of the signal selected by the signal selection unit.

Abstract translation: 目的：提供一种根据载波频率变化范围的符号定时估计装置及其方法，用于在载波频率变化较小时使用匹配滤波器的输出信号估计符号定时，并使用匹配滤波器的输入信号来估计它 当载波频率变化很大时。 构成：根据符号定时估计装置，滤波单元（100）对采样信号进行滤波。 信息生成单元（210）根据接收到的载波的变化范围生成控制信号以确定是使用信号选择单元（200）的输出信号作为采样信号还是作为来自滤波单元的滤波信号 频率。 信号选择单元根据控制信号选择性地输出采样信号和滤波信号中的一个。 符号定时估计单元（110）估计由信号选择单元选择的信号的符号定时。

公开(公告)号：KR100441989B1

公开(公告)日：2004-07-30

申请号：KR1020010071271

申请日：2001-11-16

Applicant: 한국전자통신연구원

Inventor： 강군석 ,  최권휴 ,  김수영 ,  이호진

IPC: H04L27/26

CPC classification number: H04L27/2621

Abstract: A method for optimizing phase factors in partial transmit sequence orthogonal frequency division multiplexing system. The method includes initializing sub-block signals by applying an initial phase factor to the sub-block signals in all sub-blocks; setting a reference peak value with a peak value of a signal formed by combining the sub-block signals; selecting a phase value that minimizes the peak value of an output signal as the phase factor of each sub-block by applying a next phase value to each sub-block signal as the phase factor, and repeating this with respect to the remaining available phase values.

Abstract translation: 一种优化部分发射序列正交频分复用系统相位因子的方法。 该方法包括通过将初始相位因子应用于所有子块中的子块信号来初始化子块信号; 设置具有通过组合子块信号而形成的信号的峰值的参考峰值; 通过将下一个相位值作为相位因子应用于每个子块信号来选择使输出信号的峰值最小化的相位值作为每个子块的相位因子，并且针对剩余的可用相位值 。

公开(公告)号：KR100419281B1

公开(公告)日：2004-02-18

申请号：KR1020010086267

申请日：2001-12-27

Applicant: 한국전자통신연구원

Inventor： 진광자 ,  조용훈 ,  이호진 ,  김원호

IPC: H04B1/40

Abstract: PURPOSE: A satellite communication transmission data processor and a control method therefor are provided to convert a user traffic, control/management information, signaling information, and resource assignment information composed in an Ethernet frame into a packet suitable for satellite environment, and offer a wideband satellite multimedia service. CONSTITUTION: A PCI(Programmable Communication Interface)(210) converts a bus signal of a CPU board(100) into a local data/address bus signal of a PMC(PCI Mezzanine Card) board. A CAM(220) stores an IP(Internet Protocol) address and a MAC(Media Access Control) address. A FIFO(230) temporarily stores traffic or signaling data outputted from the CPU board(100), and outputs the stored traffic or signaling data by an output byte clock. A PCG(Programmable Clock Generator)(240) generates a reference clock used in a transmission data processor and a timing signal provided to the outside. An FPGA(Field Programmable Gateway Array)(250) controls the CAM(220), the FIFO(230), the PCG(240), and the PCI(210).

Abstract translation: 目的：提供一种卫星通信传输数据处理器及其控制方法，用于将在以太网帧中构成的用户业务量，控制/管理信息，信令信息和资源分配信息转换成适合于卫星环境的分组，并提供宽带 卫星多媒体服务。 构成：PCI（可编程通信接口）（210）将CPU板（100）的总线信号转换成PMC（PCI夹层卡）板的本地数据/地址总线信号。 CAM（220）存储IP（互联网协议）地址和MAC（媒体访问控制）地址。 FIFO（230）临时存储从CPU板（100）输出的通信量或信令数据，并且通过输出字节时钟输出存储的通信量或信令数据。 PCG（可编程时钟发生器）（240）产生发送数据处理器中使用的参考时钟和提供给外部的定时信号。 FPGA（现场可编程网关阵列）（250）控制CAM（220），FIFO（230），PCG（240）和PCI（210）。

公开(公告)号：KR1020030097246A

公开(公告)日：2003-12-31

申请号：KR1020020034533

申请日：2002-06-20

Applicant: 한국전자통신연구원

Inventor： 이기동 ,  조용훈 ,  이호진

IPC: H04B7/26

CPC classification number: H04W24/00 ,  H04W28/14 ,  H04W28/18 ,  H04W72/04 ,  H04W74/004

Abstract: PURPOSE: A system for estimating a call request rate in wireless communication environment and a method therefor are provided to classify previously known data and estimate the call request rate by a regression analysis method selected by a valid expression variable. CONSTITUTION: A traffic parameter observing module(10) sets a set having adjacent nodes in an open queuing network, and collects real-time measurement observing values for observing the number of busy objects in each node and the number of existence objects in a corresponding region. A regression analysis module(20) performs a regression analysis by the observing values collected in the traffic parameter observing module(10), supposes a call request rate estimation model, and estimates an internal generation and external inflow call request rate. A resource assignment management module(30) decides whether assigning resources according to the internal generation and external inflow call request rate estimated in the regression analysis module(20), and decides the assignment quantity of the resources.

Abstract translation: 目的：提供一种用于估计无线通信环境中的呼叫请求速率的系统及其方法，用于通过由有效表达式变量选择的回归分析方法对先前已知的数据进行分类和估计呼叫请求速率。 构成：交通参数观察模块（10）在开放排队网络中设置具有相邻节点的集合，并且收集用于观察每个节点中的繁忙对象的数量和相应区域中的存在对象的数量的实时测量观察值 。 回归分析模块（20）通过在交通参数观测模块（10）中收集的观测值进行回归分析，假设呼叫请求率估计模型，并且估计内部生成和外部流入呼叫请求速率。 资源分配管理模块（30）根据在回归分析模块（20）中估计出的内部生成和外部流入呼叫请求率来决定是否分配资源，决定资源的分配量。

公开(公告)号：KR1020030075484A

公开(公告)日：2003-09-26

申请号：KR1020020014730

申请日：2002-03-19

Applicant: 한국전자통신연구원

Inventor： 신민수 ,  김호겸 ,  이호진

IPC: H04B7/185

CPC classification number: H04B7/18523 ,  H04L61/256

Abstract: PURPOSE: A satellite multimedia service system and a satellite multimedia service method are provided to offer multimedia data through a satellite without a system which assigns IP(Internet Protocol) addresses to subscribers. CONSTITUTION: A multimedia server(14) provides multimedia data as a packet. A central station control unit(12) generates subscriber management information, in which a private IP address of a subscriber terminal station(20) and a public IP address of an ISP(Internet Service Provider)(70) are matched, on the basis of a connection request message of the subscriber terminal station(20), which is provided from the ISP(70). A satellite gateway(11) processes a provided data packet on the basis of subscriber management information, and transmits the processed data packet to a satellite(30). A central station gateway(13) provides the data packet provided from the multimedia server(14), to the satellite gateway(11). The satellite gateway(11) changes a destination address of the data packet to the private IP address of the subscriber terminal station(20) according to subscriber management information, transmits the data packet to the satellite(30), so that the subscriber terminal station(20) receives the data packet.

Abstract translation: 目的：提供卫星多媒体业务系统和卫星多媒体业务方式，通过卫星提供多媒体数据，无需为用户分配IP（Internet Protocol）地址的系统。 构成：多媒体服务器（14）提供多媒体数据作为数据包。 中央站控制单元（12）生成用户管理信息，其中用户终端站（20）的私有IP地址和ISP（因特网服务提供商）（70）的公共IP地址匹配），基于 来自ISP（70）的用户终端站（20）的连接请求消息。 卫星网关（11）根据用户管理信息对所提供的数据包进行处理，并将处理的数据包发送到卫星（30）。 中央站网关（13）将从多媒体服务器（14）提供的数据包提供给卫星网关（11）。 卫星网关（11）根据用户管理信息将数据分组的目的地址改变为用户终端站（20）的私有IP地址，将数据分组发送给卫星（30），使用户终端 （20）接收数据包。

公开(公告)号：KR100392361B1

公开(公告)日：2003-07-23

申请号：KR1020010042469

申请日：2001-07-13

Applicant: 한국전자통신연구원

Inventor： 김영완 ,  송윤정 ,  이점훈 ,  김내수 ,  이호진

IPC: H04B1/16

CPC classification number: H03D7/02 ,  H04B1/28

Abstract: The present invention utilizes an even harmonic mixer for canceling a local oscillator (LO) leakage signal. The apparatus for canceling the LO leakage signal includes an in-phase divider, an intermediate frequency (IF) phase divider, an even harmonic mixers, an RF signal phase combiner and a band pass filter (BPF). The in-phase divider divides an LO signal into two in-phase LO signals, wherein the LO signal is inputted from an exterior LO. The IF phase divider divides an IF signal into two out-of-phase IF signals of which a phase difference is 90°, wherein the IF signal is inputted from an exterior means. The even harmonic mixer outputs two out-of phase RF signals of which the phase difference is 90°, after even-harmonic mixing of two in-phase LO signals divided by the in-phase divider and two out-of-phase IF signals divided by the IF phase divider. The RF signal phase combiner plays a role in canceling an image signal in the RF signal by combining two out-of-phase RF signals outputted from the even harmonic mixer. The BPF is used for canceling a residual component of the leakage signal in the RF signal outputted from the RF signal phase combiner.

Abstract translation: 本发明利用偶次谐波混频器消除本地振荡器（LO）泄漏信号。 用于抵消LO泄漏信号的装置包括同相分频器，中频（IF）分相器，偶次谐波混频器，RF信号相位组合器和带通滤波器（BPF）。 同相分频器将LO信号分成两个同相LO信号，其中LO信号从外部LO输入。 IF分相器将IF信号分成两个相位差为90°的异相IF信号，其中IF信号从外部装置输入。 偶次谐波混频器输出相位差为90°的两个反相RF信号，在用同相分频器分频的两个同相LO信号的偶次谐波混频和两个反相IF信号 通过IF分相器。 RF信号相位合成器通过组合从偶次谐波混频器输出的两个异相RF信号来起到消除RF信号中的图像信号的作用。 BPF用于消除从RF信号相位合成器输出的RF信号中的泄漏信号的残余分量。

公开(公告)号：KR1020030056317A

公开(公告)日：2003-07-04

申请号：KR1020010086516

申请日：2001-12-28

Applicant: 한국전자통신연구원

Inventor： 최승남 ,  김내수 ,  이호진

IPC: H04L12/66

CPC classification number: H04L12/5601 ,  H04L2012/5658 ,  H04L2012/5664 ,  H04L2012/5672 ,  H04L2012/5681

Abstract: PURPOSE: A satellite ATM(Asynchronous Transfer Mode) interface device for transmitting Internet and video data to a satellite network and a method therefor are provided to multiplex ATM data, the Internet data, and the video data of a terrestrial network, which have inter-different traffic characteristics, and transmit the multiplexed data to a satellite. CONSTITUTION: A line interface unit(100) synchronizes a received frame or packet, and transmits a generated corresponding frame or packet to an ATM network, an Internet network, and a transmission network. A cell/frame processing unit(200) receives the frame or packet transmitted from the line interface unit(100), and generates an ATM cell or processes a valid cell and generates a new frame. A FIFO processing unit(300) receives and stores the ATM cell generated from the cell/frame processing unit(200), and grasps states of one or more FIFOs. A multiplexing/demultiplexing process unit(400) receives state grasp result values of the FIFOs from the FIFO processing unit(300), multiplexes the ATM cells according to the characteristic of a traffic, and transmits the multiplexed ATM cell. The multiplexing/demultiplexing process unit(400) demultiplexes a cell received from the outside, and transmits the demultiplexed cells to the FIFO processing unit(300).

Abstract translation: 目的：提供一种将互联网和视频数据传输到卫星网络的卫星ATM（异步传输模式）接口设备及其方法，用于复用ATM数据，互联网数据和地面网络的视频数据， 不同的业务特性，并将复用的数据发送到卫星。 构成：线路接口单元（100）同步接收到的帧或分组，并将生成的对应的帧或分组发送到ATM网络，因特网网络和传输网络。 小区/帧处理单元（200）接收从线路接口单元（100）发送的帧或分组，并生成ATM信元或处理有效小区并生成新帧。 FIFO处理单元（300）接收并存储从小区/帧处理单元（200）生成的ATM信元，并且掌握一个或多个FIFO的状态。 复用/解复用处理单元（400）从FIFO处理单元（300）接收FIFO的状态抓取结果值，根据业务的特性复用ATM信元，并发送多路复用的ATM信元。 复用/解复用处理单元（400）对从外部接收的小区进行解复用，并将解复用的小区发送到FIFO处理单元（300）。

公开(公告)号：KR1020030056314A

公开(公告)日：2003-07-04

申请号：KR1020010086513

申请日：2001-12-28

Applicant: 한국전자통신연구원

Inventor： 이승준 ,  조용훈 ,  이호진

IPC: H04L7/00

CPC classification number: H04L7/0054 ,  H04L7/0008 ,  H04L7/0029 ,  H04L7/007

Abstract: PURPOSE: A receiver system estimating symbol timing with a forward structure and a timing estimation method thereof are provided which increase the quality of the whole communication system by using only two samples per one period and estimating accurate symbol timing. CONSTITUTION: According to the receiver system estimating timing in a symbol unit by receiving a RF transmission signal, a matching filter(4) receives a baseband signal and separates it into a real part and an imaginary part. A timing estimation part(5) receives a signal being output from the matching filter, and then estimates symbol timing using every kinds of variables. A memory device(6) stores values of variables required in the operation of the timing estimation part, and outputs them according to the request of the timing estimation part. And an interpolator(8) interpolates symbol leading timing of the baseband signal by receiving the timing estimation value being output from the timing estimation part.

Abstract translation: 目的：提供一种利用正向结构及其定时估计方法估计符号定时的接收机系统，其通过在每个周期仅使用两个采样并且估计精确的符号定时来提高整个通信系统的质量。 构成：根据接收机系统通过接收RF发送信号来估计符号单元中的定时，匹配滤波器（4）接收基带信号并将其分离为实部和虚部。 定时估计部（5）接收从匹配滤波器输出的信号，然后使用各种变量来估计符号定时。 存储装置（6）存储定时估计部的动作所需的变量的值，并根据定时推定部的要求进行输出。 并且内插器（8）通过接收从定时估计部分输出的定时估计值来内插基带信号的符号引导定时。

公开(公告)号：KR1020030056310A

公开(公告)日：2003-07-04

申请号：KR1020010086509

申请日：2001-12-28

Applicant: 한국전자통신연구원

Inventor： 주인원 ,  최동준 ,  김태희 ,  김내수 ,  이호진

IPC: H04B7/155

CPC classification number: H04L12/5601 ,  H04L2012/5641 ,  H04L2012/5642 ,  H04L2012/5675

Abstract: PURPOSE: A frame structure for unicasting and multicasting transmission and frame efficiency of a satellite time division multiple access and a method for controlling the same are provided to increase frame transport efficiency of traffic bursts and reduce unnecessary data processing load of a ground network connecting part of traffic earth stations. CONSTITUTION: Each traffic earth station reads frame data and extracts receiving earth station address signals from the read frame data, so that each traffic earth station inspects the highest level bit to judge unicasting. In the case of the unicasting, the traffic earth stations read the rest of bits to judge whether the bits are addresses of local earth stations. If not, the traffic earth stations read the rest of bits to judge whether the bits are broadcasting. In the case of the broadcasting, the earth stations receive the corresponding data. If not, the earth stations decides to receive data according to groups of the data.

Abstract translation: 目的：提供用于单播和多播传输的帧结构和卫星时分多址的帧效率及其控制方法，以提高业务突发的帧传输效率，并减少连接部分的地面网络的不必要的数据处理负担 交通地球站。 构成：每个地球站读取帧数据，并从读取帧数据中提取接收地球站地址信号，以便每个业务地球站检查最高级位以判断单播。 在单播的情况下，业务地球站读取其余比特以判断这些比特是否是本地地球站的地址。 如果没有，则地球站读取其余位以判断这些位是否正在广播。 在广播的情况下，地球站收到相应的数据。 如果不是，地球站决定根据数据组接收数据。

公开(公告)号：KR1020030056110A

公开(公告)日：2003-07-04

申请号：KR1020010086271

申请日：2001-12-27

Applicant: 한국전자통신연구원 ,  주식회사 펜타미디어

Inventor： 정훈 ,  강호일 ,  조용훈 ,  이호진

IPC: H04B7/19

CPC classification number: H04B7/18517 ,  H03F2200/294 ,  H04B7/212

Abstract: PURPOSE: A PC-based satellite communication terminal and a satellite communication system using the same are provided to offer a multimedia Internet service by a satellite communication through a PC. CONSTITUTION: A forward link receiving unit(100) demodulates, decodes, and PID(Packet ID)-filters a signal received through a satellite antenna(61). A data processing unit(300) processes a forward link signaling message, a control message, and SNMP(Simple Network Management Protocol) IP(Internet Protocol) packets, which are outputted from the forward link receiving unit(100). An Ethernet interface(400) interfaces data between the data processing unit(300) and a PC(90). A TDMA(Time Division Multiple Access) transmitting and receiving unit(200) converts IP traffic data from the PC(90) and a message outputted from the data processing unit(300) into signals capable of being transmitted to a satellite.

Abstract translation: 目的：提供基于PC的卫星通信终端和使用其的卫星通信系统，通过PC通过卫星通信提供多媒体因特网服务。 构成：前向链路接收单元（100）对通过卫星天线（61）接收的信号进行解调，解码和PID（分组ID）。 数据处理单元（300）处理从前向链路接收单元（100）输出的前向链路信令消息，控制消息和SNMP（简单网络管理协议）IP（因特网协议）分组。 以太网接口（400）在数据处理单元（300）和PC（90）之间接口数据。 TDMA（时分多址）发送和接收单元（200）将来自PC（90）的IP业务数据和从数据处理单元（300）输出的消息转换成能够被发送到卫星的信号。