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公开(公告)号：KR101040116B1
公开(公告)日：2011-06-09
申请号：KR1020100137462
申请日：2010-12-29
Applicant: 전자부품연구원
CPC classification number: Y02D70/00 , H04W52/0225 , H04B5/0056 , H04L1/16 , H04L12/28
Abstract: PURPOSE: A magnetic field communication method for managing a low power node is provided to improve communication performance and efficiency of a low frequency band wireless network of magnetic field communication. CONSTITUTION: A wakeup bit string is received. The received wakeup bit string is transmitted from a hibernation state to an activation state. A response request packet is analyzed. The response packet according to the response request packet is transmitted. A wakeup bit string exists in a preamble of the response request packet.
Abstract translation: 目的：提供用于管理低功率节点的磁场通信方法，以提高磁场通信的低频带无线网络的通信性能和效率。 构成：接收到一个唤醒位串。 接收到的唤醒位串从休眠状态发送到激活状态。 分析响应请求包。 发送响应请求报文的响应报文。 唤醒位串存在于响应请求分组的前导码中。
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公开(公告)号：KR101038097B1
公开(公告)日：2011-06-01
申请号：KR1020100029306
申请日：2010-03-31
Applicant: 전자부품연구원
IPC: H04B5/00
CPC classification number: H04W74/06 , H04L1/1607 , H04W60/00 , H04W84/18
Abstract: PURPOSE: A magnetic field communication method for multi-node recognition is provided to smoothly perform wireless communication between MFAN-C(Magnetic Field Area Network Coordinator) and MFAN-N(Node). CONSTITUTION: At least one among receives response packets is selected. A response receiving confirmation packet is transmitted to a node corresponding to the selected response packet. Response packet retransmitting a node which can not receive the response receiving confirmation packet is received. At least one among the received response packet is selected. The receiving confirmation packet is transmitted to a node corresponding to the selected response packet.
Abstract translation: 目的：提供用于多节点识别的磁场通信方法，以平滑地执行MFAN-C（磁场区域网络协调器）与MFAN-N（节点）之间的无线通信。 构成：选择接收响应数据包中至少一个。 响应接收确认分组被发送到与所选择的响应分组相对应的节点。 接收到不能接收响应接收确认分组的响应分组重传的节点。 选择所接收的响应分组中的至少一个。 接收确认分组被发送到与所选择的响应分组相对应的节点。
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公开(公告)号：KR101037432B1
公开(公告)日：2011-05-30
申请号：KR1020090018693
申请日：2009-03-05
Applicant: 전자부품연구원
CPC classification number: H04B5/0031 , H04W72/1273 , H04W84/18
Abstract: 본 발명은 다수의 센서 노드를 단 시간에 인식할 수 있도록 하는 자기장 통신 네트워크를 위한 무선 통신 방법 및 코디네이터의 복조 장치에 관한 것이다.
본 발명의 자기장 통신 네트워크를 위한 무선 통신 방법은 자기장 통신 네트워크에서의 코디네이터에 의해 수행되며, 응답을 요청하는 요청 신호를 센서 노드들에게 송신하는 (a) 단계; 센서 노드들로부터 수신한 응답 신호 중 어느 하나를 선택하는 (b) 단계; 상기 (b) 단계에서 선택한 응답 신호에 해당하는 센서 노드에게 승인 신호를 전송하는 (c) 단계; 상기 (c) 단계의 승인 신호를 받지 못한 센서 노드들이 재송신하는 응답 신호 중 어느 하나를 선택하는 (d) 단계; 및 상기 (d) 단계에서 선택한 응답 신호에 해당하는 센서 노드에게 승인 신호를 전송하는 (e) 단계를 포함하여 이루어진다.
자기장 통신, 센서 노드, 코디네이터, 리더, 적분, 믹싱-
公开(公告)号：KR101027967B1
公开(公告)日：2011-04-13
申请号：KR1020100137463
申请日：2010-12-29
Applicant: 전자부품연구원
IPC: H04B5/00
CPC classification number: H04B5/0031 , H04B5/0075
Abstract: PURPOSE: A magnetic field communication method for multi node recognition is provided to recognize a plurality of sensor nodes through one coordinator for effective management and control. CONSTITUTION: A request frame is transmitted. The requested frame requests one among a network join, a network separation, a network join state acknowledgment, a data transmission and a group address setup. The response frame transmitted form nodes which received the request frame. The response frame includes a group ID field, a response code field, and a response block.
Abstract translation: 目的：提供一种用于多节点识别的磁场通信方法，通过一个协调器识别多个传感器节点，进行有效的管理和控制。 构成：发送请求帧。 请求的帧请求网络连接，网络分离，网络连接状态确认，数据传输和组地址设置之一。 响应帧从接收请求帧的节点发送。 响应帧包括组ID字段，响应码字段和响应块。
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公开(公告)号：KR1020110033666A
公开(公告)日：2011-03-31
申请号：KR1020090091245
申请日：2009-09-25
Applicant: 전자부품연구원
IPC: H04B5/00
CPC classification number: H04B5/0037 , H04B5/0081
Abstract: PURPOSE: A magnetic field communication system for ground and underground are provided to use a magnetic field communication, thereby collecting ground and underground stat information even in a poor communication environment. CONSTITUTION: A magnetic field communication unit(110) generates a magnetic field. By a magnetic filed, the magnetic field communication unit communicates with a sensor node in a near field area by wireless. A controller(120) manages data. The data is collected from a sensor ndoe through a magnetic field communication unit. A monitoring system communication unit(130) transmits a collected system to a monitoring system. A power unit(140) includes a battery(141) and a charging unit(143).
Abstract translation: 目的：提供用于地面和地下的磁场通信系统以使用磁场通信，从而即使在恶劣的通信环境中也收集地面和地下状况信息。 构成：磁场通信单元（110）产生磁场。 通过磁场，磁场通信单元通过无线与近场区域中的传感器节点进行通信。 控制器（120）管理数据。 通过磁场通信单元从传感器ndoe收集数据。 监视系统通信单元（130）将收集的系统发送到监视系统。 动力单元（140）包括电池（141）和充电单元（143）。
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Patent Agency Ranking
公开(公告)号：KR1020110007218A
公开(公告)日：2011-01-21
申请号：KR1020107026255
申请日：2009-04-08
Applicant: 전자부품연구원
IPC: H03D7/00
CPC classification number: H03D7/165 , H03D1/2245 , H04L5/12 , H04L27/06
Abstract: PURPOSE: A demodulator for simultaneous multi-node receiving and the method thereof is provided to reduce a reception time of a node by receiving a plurality of node signals. CONSTITUTION: A clock generating part(210) generates a pair of CW signals. The CW signals have the same frequency as a modulated radio frequency signal. First and second mixers(110,120) mix an RF signal and the CW signal from a node and output a mixed signal. The phase difference between the CW signals which is respectively inputted into the first mixer and the second mixer is 90°. First and second integrators(310,320) integrate the mixed signal at the mixer. A data calculation unit(410) stores the integrated signal in the first and second integrator. The data calculation unit calculates the change of an integrated signal at a certain period to determine output data.
Abstract translation: 目的：提供同时多节点接收的解调器及其方法，通过接收多个节点信号来减少节点的接收时间。 构成：时钟产生部分（210）产生一对CW信号。 CW信号具有与调制射频信号相同的频率。 第一和第二混频器（110,120）将RF信号和来自节点的CW信号混合并输出混合信号。 分别输入到第一混频器和第二混频器的CW信号之间的相位差为90°。 第一和第二积分器（310,320）将混合信号整合在混频器中。 数据计算单元（410）将积分信号存储在第一和第二积分器中。 数据计算单元计算一定周期的积分信号的变化，以确定输出数据。
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公开(公告)号：KR1020110004347A
公开(公告)日：2011-01-13
申请号：KR1020100137459
申请日：2010-12-29
Applicant: 전자부품연구원
IPC: H04B7/24
CPC classification number: H04B5/0075 , H04W84/18
Abstract: PURPOSE: A reader for magnetic field communication is provided to execute communication using a magnetic field between a sensor and a reader, thereby performing communication between the reader and the server using a wire/wireless network. CONSTITUTION: A magnetic field communication unit(210) wirelessly receives sensing information transmitted from a sensor node using a magnetic field. A local area wireless communication unit(230) performs wireless communication with an access point. A controller(220) controls the local area wireless communication unit to transmit the sensing information to the access point through the local area wireless communication unit. The controller interprets packet data. The controller stores identification information and data of the sensor node.
Abstract translation: 目的：提供用于磁场通信的读取器，以使用传感器和读取器之间的磁场执行通信，从而使用有线/无线网络来执行读取器和服务器之间的通信。 构成：磁场通信单元（210）使用磁场无线地接收从传感器节点发送的感测信息。 局域无线通信单元（230）与接入点进行无线通信。 控制器（220）控制局域无线通信单元通过局域无线通信单元向接入点发送感测信息。 控制器解释分组数据。 控制器存储传感器节点的识别信息和数据。
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公开(公告)号：KR100962409B1
公开(公告)日：2010-06-11
申请号：KR1020080048142
申请日：2008-05-23
Applicant: 전자부품연구원
IPC: H04J11/00
Abstract: 본 발명은 OFDM 시스템의 주파수 오프셋 보상 장치 및 방법에 대하여 개시한다. 본 발명의 일면에 따른 OFDM 시스템의 샘플링 주파수 오프셋 추정 장치는 순차적으로 넘버링되고 서로 직교하는 다수의 부반송파 중에서, 소정넘버 간격의 부반송파 간의 브로드(broard) 샘플링 주파수 오프셋을 2개 이상 추정하는 브로드 오프셋 추정부; 상기 추정된 브로드 샘플링 주파수 오프셋을 평균하는 평균 연산부; 및 상기 평균된 브로드 샘플링 주파수 오프셋을, 상기 소정넘버를 초과하는 2의 거듭 제곱수로 제산하여, 상기 각 부반송파의 개별 샘플링 주파수 오프셋을 추정하는 개별 오프셋 추정부를 포함하며, 병렬처리를 지원하는 것을 특징으로 한다.
본 발명에 따르면, 부반송파별 위상 회전량을 검출하여 정밀한 주파수 오프셋 보상을 지원하며, 병렬처리를 지원하여 하드웨어 사이즈, 회로 구조 및 알고리즘이 간단해지는 효과가 있다.
OFDM, 직교주파수분할다중화, OFDM 부반송파의 위상회전, 주파수 오프셋 보상, 주파수 오프셋 추정-
公开(公告)号：KR1020080018336A
公开(公告)日：2008-02-28
申请号：KR1020060080296
申请日：2006-08-24
Applicant: 전자부품연구원
CPC classification number: H04B7/005 , H04B7/2621 , H04L25/0204
Abstract: An equalizer and a channel estimation method using the same are provided to obtain an FEQ(Frequency Equalizer) tap by applying a newly-proposed and simplified channel estimation algorithm to a preamble section, and applying an existing LMS(Least Mean Square) algorithm to a data transmission section, thereby exactly estimating a channel as reflecting a changed channel state. In a channel estimation method of a receiving signal including a preamble section and a data section, the method comprises the following steps of: approximating a square value of the receiving signal to a 2N in the preamble section; and implementing an equalizer for compensating channel distortion by using a reciprocal number of the square value of the approximated receiving signal. To the data section, an LMS algorithm is applied to perform the channel estimation.
Abstract translation: 提供了一种使用其的均衡器和信道估计方法，以通过将新提出的和简化的信道估计算法应用于前导码部分来获得FEQ（频率均衡器）抽头，并将现有的LMS（最小均方根）算法应用于 数据传输部分，从而将信道精确估计为反映改变的信道状态。 在包括前导码部分和数据部分的接收信号的信道估计方法中，该方法包括以下步骤：在前同步码段中将接收信号的平方值近似为2N; 并且通过使用近似接收信号的平方值的倒数来实现用于补偿信道失真的均衡器。 对于数据部分，应用LMS算法来执行信道估计。
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公开(公告)号：KR100776975B1
公开(公告)日：2007-11-21
申请号：KR1020060070261
申请日：2006-07-26
Applicant: 전자부품연구원
IPC: H04L27/32
CPC classification number: H04L27/34 , H04L1/0057 , H04L1/0071
Abstract: A modulator is provided to increase a data transfer rate per unit bandwidth by combining constant-amplitude coded bi-orthogonal modulation with quadrature-quatrature phase shift keying modulation to transfer data. A CACB(Constant Amplitude Coded Bi-orthogonal) modulating part(400) receives user data to perform constant amplitude coded bi-orthogonal modulation. An interleaving part(500) combines the outputs of the CACB modulator to make the outputs odd redundancy. A block coder(550) adds a redundancy bit into an output of the interleaving part. A Q^2PSK(Quadrature-Quadrature Amplitude Phase Shift Keying) modulating part(600) modulates the output of the interleaving part with bi-orthogonal phase shift.
Abstract translation: 提供调制器以通过将恒幅编码的双正交调制与正交相位相移键控调制组合以传送数据来增加每单位带宽的数据传输速率。 CACB（恒定幅度编码双正交）调制部分（400）接收用户数据以执行恒定幅度编码的双正交调制。 交织部分（500）组合CACB调制器的输出以使输出奇数冗余。 块编码器（550）将冗余位添加到交织部分的输出。 Q ^ 2PSK（正交 - 正交幅度相移键控）调制部分（600）利用双正交相移调制交错部分的输出。
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