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公开(公告)号：KR100956257B1
公开(公告)日：2010-05-06
申请号：KR1020070129683
申请日：2007-12-13
Applicant: 한국전자통신연구원
Abstract: 본 발명은 케이블 모뎀에서 위상 지터를 제거하기 위한 장치 및 방법에 관한 것으로, 입력신호의 이득이 기설정한 값으로 수렴하도록 제어한 이득 제어한 신호와 저역통과필터(LPF : Low Pass Filter)를 통해 조절된 신호의 변화량을 출력하는 자동이득 제어장치; 및, 상기 이득 제어한 신호를 저장된 위상옵셋을 이용하여 보정하고 보정한 신호를 상기 신호의 변화량으로 나누어서 위상 지터(Phase jitter)를 제거하는 반송파 복원 장치를 포함한다.
위상 지터, 케이블 모뎀, 자동 이득제어, 반송파 복원-
公开(公告)号：KR1020080052142A
公开(公告)日：2008-06-11
申请号：KR1020070029509
申请日：2007-03-27
Applicant: 한국전자통신연구원
CPC classification number: H04L41/50 , H04L41/0896
Abstract: An apparatus and a method for controlling a transmission rate are provided to secure QOS(Quality Of Service) to users which have to receive services more than a predetermined level and set the maximum transmission rate to limit the transmission rate, thereby preventing the data overflow of an uplink sub receiving module buffer and minimizing the variation of throughput for the transmission rate of an uplink sub receiving module. An apparatus for controlling a transmission rate comprises a subscriber information table(406), a transmission rate calculating module(404), an uplink sub receiving module(402), and a memory(408). The subscriber information table stores information indicating that each subscriber is a guaranteed subscriber or a normal subscriber. The uplink sub receiving module receives uplink data from a cable modem, and initializes a temporary transmission rate stored in the memory as traffic information is received from the cable modem. The transmission rate calculating module determines a variation constant based on the traffic information received from the uplink sub receiving module, and updates the maximum transmission rate set to the cable modem on the basis of the variation constant. The transmission rate calculating module includes a transmission non-calculating module(404a), a transmission rate increasing module(404b), and a transmission rate decreasing module(404c). The transmission non-calculating module calculates a ratio of a currently allocated transmission rate and the required transmission rate of each terminal connected to the cable modem as the traffic information is received. The transmission rate increasing module and the transmission rate decreasing module determines the variation of a transmission rate in the each terminal on the basis of the traffic information and are selectively operated.
Abstract translation: 提供一种用于控制传输速率的装置和方法，用于将QOS（服务质量）确保给必须接收超过预定级别的服务的用户，并设置最大传输速率以限制传输速率，从而防止数据溢出 上行链路子接收模块缓冲器，并且最小化上行链路子接收模块的传输速率的吞吐量的变化。 用于控制传输速率的装置包括用户信息表（406），传输速率计算模块（404），上行链路子接收模块（402）和存储器（408）。 用户信息表存储指示每个用户是保证用户或普通用户的信息。 上行链路子接收模块从电缆调制解调器接收上行链路数据，并从电缆调制解调器接收到业务信息，初始化存储在存储器中的临时传输速率。 传输速率计算模块基于从上行链路子接收模块接收的业务信息来确定变化常数，并根据变化常数更新设置到电缆调制解调器的最大传输速率。 传输速率计算模块包括传输不计算模块（404a），传输速率增加模块（404b）和传输速率降低模块（404c）。 传输非计算模块计算当接收到交通信息时当前分配的传输速率和连接到电缆调制解调器的每个终端的所需传输速率的比率。 传输速率增加模块和传输速率降低模块基于交通信息确定每个终端中的传输速率的变化并且被选择性地操作。
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公开(公告)号：KR101883395B1
公开(公告)日：2018-07-31
申请号：KR1020110139099
申请日：2011-12-21
Applicant: 한국전자통신연구원
IPC: H04N21/414 , G06K19/06 , H04N21/266
Abstract: 본발명은방송스트림수신기술에관한것으로, 더욱상세하게는스마트폰과같은사용자단말을이용하여방송을시청할수 있는방송스트림수신기술에관한것이다. 특히, 본발명의실시예에의하면, 사용자단말은언제어디서든시각적코드의코드정보를인식함으로써, 그코드정보의방송스트림을재생시킬수 있다.
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公开(公告)号：KR1020170120381A
公开(公告)日：2017-10-31
申请号：KR1020160048798
申请日：2016-04-21
Applicant: 한국전자통신연구원
IPC: H04N21/475 , H04N21/2362
Abstract: 사용자별 방송서비스제공방법이개시된다. 본발명에따른사용자별 방송서비스제공방법은사용자의가입수준별로서비스를제공하기위한서비스레벨서술자를프리앰블심볼(Preamble Symbol)에삽입하는단계; 상기프리앰블심볼을방송신호프레임에포함시켜전송하는단계; 및복수개의피지컬레이어파이프(Physical Layer PiPe, PLP)들을통해전송된복수개의방송채널들을상기서비스레벨서술자에상응하게분류하여제공하는단계를포함한다.
Abstract translation: 公开了一种用于为每个用户提供广播服务的方法。 根据本发明的另一方面，提供了一种为每个用户提供广播服务的方法，所述方法包括：将用于根据用户的订阅等级提供服务的服务等级描述符插入到前导符号中; 通过将前导符号包括在广播信号帧中来发送前导符号; 并根据服务等级描述符对通过多个物理层PiPe（PLP）传输的多个广播信道进行分类和提供。
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公开(公告)号：KR1020170110822A
公开(公告)日：2017-10-12
申请号：KR1020160035075
申请日：2016-03-24
Applicant: 한국전자통신연구원
IPC: H04L27/26
CPC classification number: H04L27/2621 , H04L27/2618 , H04L27/3411
Abstract: OFDM 시스템에서계층분할다중화를위한피크전력대 평균전력비(Peak-to-Average Power Ratio; PAPR)를감소시키는장치가제공된다. 상기피크전력대 평균전력비저감장치는: 입력된부반송파신호의피크전력을검출하고, 상기검출된피크전력을낮추는피크제거신호를생성하는피크제거부, 및상기부반송파신호및 상기피크제거신호가합산된제1 신호에성상도재매핑을수행한후, 추가데이터를삽입한제2 신호를생성하는처리부를포함할수 있다.
Abstract translation: 提供了一种用于降低OFDM系统中的分层多路复用的峰均功率比（PAPR）的装置。 峰值功率对平均功率比降低装置包括：输入副载波信号的检测到的峰值功率，峰值系统拒绝以生成峰值消除信号，以减少检测到的峰值功率，并且该副载波信号和峰值消除信号将所述 1信号，然后生成插入附加数据的第二信号。
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Patent Agency Ranking
公开(公告)号：KR1020160075218A
公开(公告)日：2016-06-29
申请号：KR1020140184926
申请日：2014-12-19
Applicant: 한국전자통신연구원
IPC: H04L27/26
CPC classification number: H04L27/26 , H04L27/2601 , H04L27/2602
Abstract: 직교주파수분할다중시스템의수신장치는입력되는 OFDM 심볼에대해대략적인(coarse) 샘플링타이밍오차를보상한다음, 대략적인샘플링타이밍오차가보상된 OFDM 심볼에대해해당 OFDM 심볼과직전 OFDM 심볼의 CP(Continual pilot)를이용하여잔여샘플링타이밍오차를추정하고, 추정된잔여샘플링타이밍오차를위상값으로변환한후, 위상값을토대로상기해당 OFDM 심볼의잔여샘플링타이밍오차를보상한다.
Abstract translation: 本发明的目的是提供一种可以补偿精细采样定时误差的正交频分复用（OFDM）系统的接收装置，以及用于补偿其采样定时的方法。 用于OFDM系统的接收装置补偿输入的OFDM符号的粗抽样定时误差，然后使用补偿其粗抽样定时误差的OFDM符号的连续导频和先前的OFDM符号来估计相应OFDM的残差采样定时误差 将估计的残余采样定时误差转换为相位值，然后基于相位值补偿相应OFDM符号的残余采样定时误差。
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公开(公告)号：KR101463293B1
公开(公告)日：2014-11-21
申请号：KR1020110132769
申请日：2011-12-12
Applicant: 한국전자통신연구원
IPC: H04L27/26
Abstract: 본 발명은 신호 대 잡음비에 따른 채널별 변조기법 선택장치 및 방법에 관한 것으로서, 주기적으로 전송되는 프리앰블 신호를 수신하는 프리앰블 신호 수신부, 상기 수신된 프리앰블 신호로부터 채널 상태 정보를 측정하는 채널 상태 정보 측정부, 상기 측정한 채널 상태 정보로부터 신호 대 잡음비(SNR)를 추정하는 신호 대 잡음비 추정부, 및 상기 추정된 신호 대 잡음비를 송신측 단말기로 피드백 처리하는 피드백 처리부를 포함하고, 상기 송신측 단말기는, 상기 피드백 처리된 신호 대 잡음비와 이전 수신된 신호의 신호 대 잡음비가 동일한지 비교하고, 상기 비교 결과 동일한 경우, 상기 프리앰블 신호의 전송에 사용된 대역폭과 변조방식을 유지하고, 상기 비교 결과 동일하지 않은 경우, 상기 프리앰블 신호의 전송에 사용된 대역폭 및 변조방식 중에 서 적어도 하나를 변경할 수 있다.
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28.发明公开
公开(公告)号：KR1020140106894A
公开(公告)日：2014-09-04
申请号：KR1020130021141
申请日：2013-02-27
Applicant: 한국전자통신연구원
CPC classification number: H04L27/2665 , H04L27/265 , H04L27/2695
Abstract: A time synchronization method in an orthogonal frequency division multiplexing (OFDM) system comprises: a coarse time synchronization step of determining the start position of an OFDM symbol by performing coarse time synchronization using correlation of a protection interval of the OFDM symbol of a received signal; and a fine time synchronization step of estimating the fast Fourier transform (FFT) window position of the OFDM symbol by performing fine time synchronization through analysis of channel impulse response (CIR) characteristics of the received signal. Therefore, complexity of time offset estimation can be reduced, and accuracy of offset estimation can be improved.
Abstract translation: 正交频分复用（OFDM）系统中的时间同步方法包括：粗时间同步步骤，通过使用接收信号的OFDM符号的保护间隔的相关来执行粗略时间同步来确定OFDM符号的开始位置; 以及精细时间同步步骤，通过分析接收信号的信道脉冲响应（CIR）特性来执行精细时间同步来估计OFDM符号的快速傅里叶变换（FFT）窗口位置。 因此，可以减少时间偏移估计的复杂度，并且可以提高偏移估计的精度。
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公开(公告)号：KR1020140076869A
公开(公告)日：2014-06-23
申请号：KR1020120145389
申请日：2012-12-13
Applicant: 한국전자통신연구원
CPC classification number: G06Q30/0267 , H04W4/02
Abstract: Disclosed are a method, an apparatus, and a system for providing mobile advertisements in a small-scale wireless network. The method for providing mobile advertisements comprises the steps of: receiving an entrance message notifying that a mobile terminal enters a wireless network; receiving an information reception flag inquiring about whether or not to receive information about events near the current location of the mobile terminal, wherein the information about events includes information about discounts; and transmitting the information about events to the mobile terminal according to a response of the mobile terminal to the information reception flag. Therefore, when a subscriber using a mobile device exists in the network, information about ongoing events within the network can be provided for the subscriber through a short message service (SMS) or a mobile phone application. Consequentially, user convenience is improved.
Abstract translation: 公开了一种用于在小规模无线网络中提供移动广告的方法，装置和系统。 提供移动广告的方法包括以下步骤：接收通知移动终端进入无线网络的入口消息; 接收关于是否接收关于移动终端的当前位置附近的事件的信息的信息接收标志，其中关于事件的信息包括关于折扣的信息; 以及根据移动终端对信息接收标志的响应，将关于事件的信息发送到移动终端。 因此，当在网络中存在使用移动设备的订户时，可以通过短消息服务（SMS）或移动电话应用为用户提供关于网络内正在进行的事件的信息。 因此，用户便利性得到改善。
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公开(公告)号：KR1020130141038A
公开(公告)日：2013-12-26
申请号：KR1020120064116
申请日：2012-06-15
Applicant: 한국전자통신연구원
IPC: G03B21/14
CPC classification number: G03B21/14 , G03B31/04 , H04N5/4401 , H04N9/3129
Abstract: The present invention relates to fusion between car technology and broadcasting technology, in particular, a personal car theater system which is implemented by combining an image projector to a car. The personal car theater system is installed in a car and includes: a multimedia processing unit for obtaining video data and sound data of multimedia contents; an image projector installed in the outside of the car for receiving and projecting the video data from the multimedia processing unit; a switch for selecting one between a general mode in which the image projector operates as a headlight and a broadcasting mode in which the projector projects the video; a sound transmission device for receiving sound data from the multimedia processing unit and transmitting to a terminal using wireless communication; and a terminal for receiving the sound data from the sound transmission device using wireless communication and outputting sound, wherein the multimedia processing unit transmits the sound data to a speaker which is prepared in the car when the switch selects the general mode, and the multimedia processing unit transmits the sound data to the sound transmission device when the switch selects the broadcasting mode. [Reference numerals] (S100) Multimedia processing device;(S110) Image projection device;(S120) Switch;(S130) Sound transmission device;(S140) Terminal
Abstract translation: 本发明涉及汽车技术与广播技术之间的融合，特别涉及通过将图像投影仪与汽车组合而实现的个人车厢系统。 个人车厢系统安装在汽车中，包括：多媒体处理单元，用于获取多媒体内容的视频数据和声音数据; 安装在汽车外部的图像投影仪，用于从多媒体处理单元接收和投影视频数据; 用于在图像投影仪作为头灯操作的一般模式和投影仪投影视频的广播模式之间进行选择的开关; 用于从所述多媒体处理单元接收声音数据并使用无线通信向终端发送的声音传输装置; 以及终端，用于使用无线通信从声音传输装置接收声音数据并输出声音，其中多媒体处理单元在开关选择一般模式时将声音数据发送到在汽车中准备的扬声器，并且多媒体处理 当开关选择广播模式时，单元将声音数据发送到声音传输设备。 （S100）多媒体处理装置;（S110）图像投影装置;（S120）开关;（S130）声音传送装置;（S140）终端
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