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公开(公告)号：KR1020140066894A
公开(公告)日：2014-06-03
申请号：KR1020120133692
申请日：2012-11-23
Applicant: 한국전자통신연구원
IPC: H04B10/116
Abstract: A method and an apparatus for demodulating visible light communication data modulated in a VPPM method are disclosed. According to an embodiment of the present invention, a method for demodulating visible light communication data comprises the steps of: generating sampling signals by receiving and sampling visible light communication signals modulated in a VPPM method; comparing a preset threshold with a first sampling signal among the sampling signals; setting an initial rise flag to a first level when the first sampling signal is larger than the preset threshold and setting the initial rise flag to a second level when the first sampling signal is smaller than the preset threshold; generating an accumulated sample value by accumulating the sampling signals increasing a sample count value; comparing the accumulated sample value with a value in which the threshold is multiplied by the sample count value; making a first bit data into demodulation data, if the initial rise flag is at the second level, when the accumulated sample value is larger than the value in which the threshold is multiplied by the sample count value; and making a second bit data into demodulation data, if the initial rise flag is at the first level, when the accumulated sample value is smaller than the value in which the threshold is multiplied by the sample count value.
Abstract translation: 公开了一种用于解调以VPPM方法调制的可见光通信数据的方法和装置。 根据本发明的实施例，一种用于解调可见光通信数据的方法包括以下步骤：通过接收和采样以VPPM方法调制的可见光通信信号来产生采样信号; 将预设阈值与采样信号中的第一采样信号进行比较; 当所述第一采样信号大于所述预设阈值时，将初始上升标志设置为第一电平，并且当所述第一采样信号小于所述预设阈值时将所述初始上升标志设置为第二电平; 通过累积采样信号来增加采样计数值来产生累积采样值; 将累加的采样值与阈值乘以样本计数值的值进行比较; 当初始上升标志处于第二电平时，当累积采样值大于阈值乘以采样计数值的值时，将第一位数据提供给解调数据; 以及当所述初始上升标志处于所述第一电平时，当所述累积采样值小于所述阈值乘以所述采样计数值的值时，将第二位数据提供给解调数据。
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公开(公告)号：KR1020140015652A
公开(公告)日：2014-02-07
申请号：KR1020120067812
申请日：2012-06-25
Applicant: 한국전자통신연구원
IPC: H04B10/116 , H04B10/516 , H04J13/00 , H04B1/707 , H04B1/692 , H04B1/69
CPC classification number: H04B10/516 , H04B1/692 , H04B1/707 , H04B10/116 , H04J13/0048 , H04B2001/6904 , H04B2001/6908 , H04J13/0003
Abstract: The present invention provides an apparatus for communication between vehicles using visible light communication, which includes: a spreading code applying unit which applies a spreading code to transmission data to be transmitted; and a transmitting unit which generates a transmission frame based on the transmission data to which the spreading code is applied and transmits the transmission frame through an illumination lamp of a vehicle. The transmission frame includes a preamble field for synchronizing the transmission frame, a data field for transmitting the transmission data, and a position field for providing hopping information of the transmission data. [Reference numerals] (110) Spreading code applying unit; (120) Transmitting unit; (200) Receiving apparatus
Abstract translation: 本发明提供了一种使用可见光通信的车辆之间的通信装置，包括：扩展码施加单元，对扩展码进行发送; 以及发送单元，其基于应用了扩展码的发送数据生成发送帧，并通过车辆的照明灯发送发送帧。 发送帧包括用于同步发送帧的前同步码字段，用于发送发送数据的数据字段和用于提供发送数据的跳频信息的位置字段。 （附图标记）（110）扩展码施加单元; （120）发射单元; （200）接收装置
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公开(公告)号：KR101358301B1
公开(公告)日：2014-02-06
申请号：KR1020100063501
申请日：2010-07-01
Applicant: 한국전자통신연구원
IPC: H04B7/08
CPC classification number: H04L25/03343 , H04L1/0001 , H04L1/20 , H04L5/0007 , H04L25/0204 , H04L25/0224
Abstract: 본 발명에 따른 다중 안테나 통신 시스템의 상향 링크 적응 방법은, 복수의 전송 안테나를 포함하는 단말기로부터 사운딩 기준 신호(SRS)를 수신하는 단계, 상기 사운딩 기준 신호로부터 채널 응답에 대응하는 복소 채널 행렬(
H ) 또는 잡음 전력에 대응하는 잡음 분산(
σ
2 )을 계산하는 단계, 상기 복소 채널 행렬(
H ) 또는 상기 잡음 분산(
σ
2 )을 참조하여 각 전송 심벌들에 대한 신호대 간섭 및 잡음비(SINR)를 계산하는 단계, 그리고 상기 신호대 간섭 및 잡음비(SINR)를 참조하여 상기 단말기의 프리코딩 행렬을 선택하는 단계를 포함한다.-
公开(公告)号：KR101355432B1
公开(公告)日：2014-01-28
申请号：KR1020120037949
申请日：2012-04-12
Applicant: 한국전자통신연구원
Abstract: LED를 이용한 조명기기에서 조명의 휘도 조절 기능을 저해하지 않으면서도 가시광 무선통신이 가능하도록 한 장치 및 방법을 제시한다. 가시광 무선통신 장치는, 입력된 휘도 요구 정보에 상응하는 조명 구동신호의 듀티 사이클을 계산하고 계산된 듀티 사이클에 근거한 휘도 신호의 클럭 횟수 정보를 생성하는 휘도 신호 생성수단, 전송할 전송 데이터를 생성하는 전송 데이터 생성수단, 휘도 신호의 클럭 횟수 정보 및 전송 데이터를 근거로 펄스 파형의 조명 구동신호를 만들어 출력하되 전송 데이터에 근거하여 조명 구동신호의 파형에서 비트 단위 시간마다의 온(ON)구간의 펄스 위치를 조정하는 조명 구동수단, 및 조명 구동수단으로부터의 조명 구동신호에 따라 동작하는 조명을 포함한다.
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公开(公告)号：KR101307070B1
公开(公告)日：2013-09-26
申请号：KR1020090124348
申请日：2009-12-15
Applicant: 한국전자통신연구원
IPC: H04B1/40
CPC classification number: H04L9/0662 , H04L2209/80
Abstract: 효율적인 스크램블링 또는 디스크램블링 방법 및 시스템을 제공한다. 스크램블링 시스템은 데이터 스트림들을 생성하는 데이터 스트림 생성부, 상기 생성된 데이터 스트림들 각각에 대한 시퀀스 출력을 산출하는 스크램블링 LFSR 그룹, 및 상기 산출된 시퀀스 출력을 이용하여 상기 생성된 데이터 스크림들을 스크램블링하는 스크램블링 처리부를 포함한다. 디스크램블링 시스템은 스크램블링된 데이터를 이용하여 스크램블드 데이터 스트림들로 생성하는 스크램블드 데이터 스트림 생성부, 상기 생성된 스크램블드 데이터 스트림들 각각에 대한 시퀀스 출력을 산출하는 디스크램블링 LFSR 그룹, 및 상기 산출된 시퀀스 출력을 이용하여 스크램블드 데이터 스트림들을 디스크램블링하는 디스크램블링 처리부를 포함한다.
스크램블링, 디스크램블링, scrambling, descrambling, LFSR, LTE-Advanced-
Patent Agency Ranking
公开(公告)号：KR1020130073528A
公开(公告)日：2013-07-03
申请号：KR1020110141419
申请日：2011-12-23
Applicant: 한국전자통신연구원
CPC classification number: H04L27/3872 , H04L27/18
Abstract: PURPOSE: A phase rotation modulation & demodulation apparatus and a method thereof are provided to prevent degradation of reception performance, and to obtain high electricity of a transmitter. CONSTITUTION: A transmitting apparatus comprises: a bit grouping (100), a phase rotation symbol mapper (110), an up-sampler (120), a transmission filter (130), a digital analog converter (140), and an orthogonal modulator (150). The bit grouping performs a k bit grouping to map an input bit string into a symbol having M level. The phase rotation symbol mapper is inputted with the k bit, and produces a complex symbol having a phase rotational characteristic. The up-sampler performs an up-sampling of the phase rotation encoded symbol. The transmission filter filters the up-sampled signal. The digital analog converter generates a radio transmission signal by converting a digital signal to an analog signal and passing through the orthogonal modulator. [Reference numerals] (100) Bit grouping; (110) Phase rotation symbol mapper; (120) Up-sampler; (130) Transmission filter; (140) Digital analog converter; (150) Orthogonal modulator
Abstract translation: 目的：提供一种相位旋转调制解调装置及其方法，以防止接收性能下降，并获得发射机的高电量。 构成：发射装置包括：位分组（100），相位旋转符号映射器（110），上采样器（120），发射滤波器（130），数字模拟转换器（140）和正交调制器 （150）。 比特分组执行k比特分组以将输入比特串映射成具有M级的符号。 相位旋转符号映射器输入k位，并产生具有相位旋转特性的复数符号。 上采样器执行相位旋转编码符号的上采样。 发送滤波器对上采样信号进行滤波。 数字模拟转换器通过将数字信号转换为模拟信号并通过正交调制器来产生无线电传输信号。 （附图标记）（100）位分组; （110）相位旋转符号映射器; （120）上采样器; （130）变速器过滤器; （140）数字模拟转换器; （150）正交调制器
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公开(公告)号：KR1020130071453A
公开(公告)日：2013-06-28
申请号：KR1020130063049
申请日：2013-05-31
Applicant: 한국전자통신연구원
IPC: H04B10/116
Abstract: PURPOSE: A visible light communication device for providing directive information and a method using the same are provided to selectively operate light sources according to a channel state. CONSTITUTION: A light source selection unit(2110) selects a light source for indicating color corresponding to the state of devices executing visible communication. A visible light communication unit(2120) visually recognizes the state with color. The state includes a communication state of the visible communication, a channel state, and a file transmission state. The channel state is classified with a transmission error rate. [Reference numerals] (2110) Light source selection unit; (2120) Visible light communication unit
Abstract translation: 目的：提供一种用于提供指令信息的可见光通信设备及其使用方法，以根据信道状态选择性地操作光源。 构成：光源选择单元（2110）选择用于指示与执行可视通信的设备的状态相对应的颜色的光源。 可视光通信单元（2120）以彩色视觉识别状态。 该状态包括可视通信的通信状态，信道状态和文件传输状态。 信道状态按传输错误率进行分类。 （2110）光源选择单元; （2120）可见光通信单元
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公开(公告)号：KR1020130067636A
公开(公告)日：2013-06-25
申请号：KR1020110134395
申请日：2011-12-14
Applicant: 한국전자통신연구원
IPC: H04L27/26
CPC classification number: H04L27/2627
Abstract: PURPOSE: A base station modem transmission device is provided to reduce loss according to additional resource use and processing time following to individual operation of an encoder and a modulator. CONSTITUTION: A layer 2 interface and modem transmission unit control device(100) processes and supplies necessary information to an encoding and modulation device(200) using information supplied from a layer 2 and a downlink logic channel. The encoding and modulation device mixes encoding and modulation functions suitable for each transmitted channel by downlink physical channel and downlink physical signal and transmits the mixed information to a resource allocation and OFDM(Orthogonal Frequency Division Multiplexing) processing unit. The resource allocation and OFDM processing unit locates a region to a corresponding subcarrier transmitted with respect to the each downlink physical channel and the each downlink physical signal and a time fitting with the same. The resource allocation and OFDM processing unit sequentially performs a process of guard band insertion, IFFT and cyclic prefix addition and transmits the data to an RF device. [Reference numerals] (100) Layer 2 interface and modern transmission unit; (AA) Base modem transmission unit(LTE-Advanced System)
Abstract translation: 目的：提供基站调制解调器传输设备，以根据编码器和调制器的单独操作后的附加资源使用和处理时间来减少损耗。 构成：使用从层2和下行链路逻辑信道提供的信息，层2接口和调制解调器传输单元控制设备（100）处理并向编码和调制设备（200）提供必要的信息。 编码和调制装置通过下行物理信道和下行物理信号混合适用于每个发送信道的编码和调制功能，并将混合信息发送到资源分配和OFDM（正交频分复用）处理单元。 资源分配和OFDM处理单元将区域定位到相对于每个下行链路物理信道和每个下行链路物理信号发送的相应子载波和与其相适应的时间。 资源分配和OFDM处理单元顺序执行保护带插入，IFFT和循环前缀相加处理，并将数据发送到RF设备。 （附图标记）（100）二层接口和现代传输单元; （AA）基本调制解调器传输单元（LTE-Advanced系统）
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公开(公告)号：KR1020130067634A
公开(公告)日：2013-06-25
申请号：KR1020110134393
申请日：2011-12-14
Applicant: 한국전자통신연구원
IPC: G06F12/00
Abstract: PURPOSE: A memory management device is provided to efficiently manage a memory by managing the memory by fixed packet unit and allocating the memory by variable packet unit. CONSTITUTION: A management unit(301) divides a memory into packet areas based on the size of a set packet and classifies the packet areas into multi packet areas. If first and second packet areas in the multi packet areas are not free, a processor(303) is interlinked with a packet area allocation request to compose a third packet including partial areas of the first and the second packet areas. The processor allocates the third packet area in response to the request. The processor is interlinked with a packet area return request to select and return one of the multi packet areas. [Reference numerals] (301) Management unit; (303) Processor
Abstract translation: 目的：提供一种存储器管理装置，通过固定分组单元管理存储器并通过可变分组单元分配存储器来有效地管理存储器。 构成：管理单元（301）基于设置的分组的大小将存储器划分为分组区域，并将分组区域分类为多个分组区域。 如果多分组区域中的第一和第二分组区域不是空闲的，则处理器（303）与分组区域分配请求相互联系，以组成包括第一和第二分组区域的部分区域的第三分组。 处理器响应于该请求分配第三分组区域。 处理器与分组区域返回请求相互连接，以选择并返回多个分组区域之一。 （附图标记）（301）管理单元; （303）处理器
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公开(公告)号：KR1020130063940A
公开(公告)日：2013-06-17
申请号：KR1020110130573
申请日：2011-12-07
Applicant: 한국전자통신연구원
CPC classification number: H04J3/06 , H04L7/00 , H04W56/0085 , H04L7/10 , H04W56/0015
Abstract: PURPOSE: An uplink synchronization method between a terminal and a base station is provided to effectively execute an uplink process between the base station and the terminal in a coast wireless communication system. CONSTITUTION: A terminal transmits an initial access signal to a base station(210). The base station obtains uplink synchronization by using the initial access signal received from the terminal(220). The base station notifies the acquisition of the uplink synchronization to the terminal(230). The terminal transmits a data signal to the base station(240). The base station receives the data signal from the terminal(250). [Reference numerals] (210) Terminal transmits an initial access frame; (220) Base station obtains uplink synchronization by using an initial access frame; (230) Notify the acquisition of uplink synchronization to a terminal; (240) Terminal transmits a data frame; (250) Receive a data frame; (260) Base station tracks uplink synchronization; (AA) Start; (BB) End
Abstract translation: 目的：提供终端和基站之间的上行同步方法，以有效地执行海岸无线通信系统中基站与终端之间的上行链路过程。 构成：终端向基站（210）发送初始接入信号。 基站通过使用从终端（220）接收的初始接入信号来获得上行链路同步。 基站向终端通知上行链路同步的获取（230）。 终端向基站（240）发送数据信号。 基站从终端（250）接收数据信号。 （附图标记）（210）终端发送初始接入帧; （220）基站通过使用初始接入帧获取上行链路同步; （230）向终端通知上行链路同步的获取; （240）终端发送数据帧; （250）接收数据帧; （260）基站跟踪上行同步; （AA）开始; （BB）结束
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