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公开(公告)号：KR101049509B1
公开(公告)日：2011-07-15
申请号：KR1020070123944
申请日：2007-11-30
Abstract: 본 발명은 복수개의 송신 안테나를 이용하는 CIOD-OFDM 시스템에서 상호채널간섭 존재시 신호검출방법 및 시스템에 관한 것으로, (a) 복수개의 송신 안테나로부터 송신되는 신호를 수신하여 푸리에 변환하는 단계와, (b) 상기 신호가 송신되는 채널을 추정하는 단계와, (c) 상기 추정된 주파수측 채널 매트릭스에 QR 분해를 적용하고, 상기 QR 분해 결과 생성되는 R 매트릭스를 이용하여 ML(Maximum Likelihood) 검출 방식에 따라 상호채널간섭(CCI)이 제거된 상태의 신호를 검출하는 단계를 포함한다.
STBC, OFDM, CIOD, CCIAbstract translation: 一种用于使用多个发射天线在CIOD-OFDM系统中检测信道间干扰的方法和系统，所述方法包括：（a）接收从多个发射天线发射的信号并执行傅里叶变换;以及 ）估计发送信号的信道;（c）将QR分解应用于估计的频率侧信道矩阵，并且使用作为QR分解的结果而生成的R矩阵执行最大似然（ML）检测 并检测出去除了互信道干扰（CCI）的信号。
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2.发明公开
公开(公告)号：KR1020090056730A
公开(公告)日：2009-06-03
申请号：KR1020070124011
申请日：2007-11-30
CPC classification number: H04L27/2628 , H04B7/0413 , H04L1/0606 , H04L1/0618 , H04L25/0204 , H04L27/2695
Abstract: A method for transmitting and receiving data by STBC(Space-Time Block Coded) and SFBC(Space-Frequency Block Coded) switching in an MIMO(Multiple Input Multiple Output) OFDM(Orthogonal Frequency Division Multiplexing) system and an STBC and SFBC switching MIMO OFDM system are provided to improve a BER(Bit Error Rate) by switching the STBC or SFBC method according to a channel environment. A serial to parallel transform unit(101) transforms the serially inputted data symbol to the parallel data symbol. An STBC/SFBC encoder(102) encodes the parallel data symbol inputted from the serial to parallel transform unit by one of the STBC or SFBC method and forms the signal. An IFFT(Inverse Fast Fourier Transform) unit performs the IFFT of the encoded data in the STBC/SFBC encoder and transforms the data into the signal in the time axis. A parallel to serial transform unit(104) transforms data transformed in the IFFT transform unit into the serial data. A CP(Cyclic Prefix) insertion unit inserts the CP into a guard interval in the time axis of the data transformed to the time domain. An STBC/SFBC controller controls the STBC/SFBC encoder to perform the encoding by one selected adaptively according to the channel situation among the STBC and SFBC methods.
Abstract translation: 一种用于通过MIMO（多输入多输出）OFDM（正交频分复用）系统中的STBC（空时块编码）和SFBC（空频块编码）切换来发送和接收数据的方法，以及STBC和SFBC交换MIMO 提供OFDM系统以通过根据信道环境切换STBC或SFBC方法来提高BER（误码率）。 串行到并行变换单元（101）将串行输入的数据符号变换为并行数据符号。 STBC / SFBC编码器（102）通过STBC或SFBC方法之一对从串行到并行变换单元输入的并行数据符号进行编码，并形成信号。 IFFT（逆快速傅立叶变换）单元执行STBC / SFBC编码器中的编码数据的IFFT，并将该数据变换成时间轴上的信号。 并行到串行变换单元（104）将在IFFT变换单元中变换的数据变换为串行数据。 CP（循环前缀）插入单元将CP插入转换到时域的数据的时间轴上的保护间隔。 STBC / SFBC控制器控制STBC / SFBC编码器根据STBC和SFBC方法之间的通道情况自适应选择一个编码。
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公开(公告)号：KR101429713B1
公开(公告)日：2014-09-25
申请号：KR1020080044665
申请日：2008-05-14
IPC: H04B7/04
CPC classification number: H04L25/03203 , H04L25/03191 , H04L25/0328 , H04L25/03343 , H04L2025/03426
Abstract: 본 발명에 따른 다중 사용자 다중 안테나 통신 시스템에서 백터 퍼터베이션에 기반한 저 복잡도 프리코딩 방법은 후보 심볼의 누적가지 메트릭의 기준값을 결정하는 단계; 결정된 후보 심볼의 누적가지 메트릭의 기준값을 초과하는 누적가지 메트릭 값을 갖는 후보를 제거함과 함께 후보 심볼의 누적가지 메트릭의 기준값을 초과하지 않는 후보 심볼의 누적가지 메트릭 값을 엔트리로 등록하는 단계; 및 엔트리로 등록된 후보 심볼의 누적가지 메트릭 값 중 가장 작은 후보 심볼의 누적가지 메트릭 값을 선택하는 단계를 포함하는 것으로 기존에 사용된 Sphere Encoding 기법과 비교 하여 낮은 복잡도를 가지면서 성능은 유사한 이점이 있다.
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公开(公告)号：KR101439756B1
公开(公告)日：2014-09-17
申请号：KR1020130030894
申请日：2013-03-22
Applicant: 한국과학기술원
CPC classification number: H04B7/024 , H04B7/0617 , H04B15/00 , H04K3/00 , H04W12/08
Abstract: An embodiment of the present invention relates to an optimal physical layer secure transmission method between cooperative devices and a base station for strengthening the secret information security of a user which communicates with the base station by using a physical layer signal processing technique in a downlink cellular communications network. The present invention relates to an optimal cooperation transmission method of a cooperative node and the base station having a multiple antenna in a communications network including the base station and mobile terminals. The present invention can provide the optimal cooperation transmission method which includes: a step of generating a signal of the base station to maximize the security transmission of a reception terminal intended by the base station; and a step of generating an optimal jamming signal of the cooperative node.
Abstract translation: 本发明的实施例涉及协作设备与基站之间的最佳物理层安全传输方法，用于通过在下行蜂窝通信中使用物理层信号处理技术来加强与基站通信的用户的秘密信息安全性 网络。 本发明涉及一种协作节点的最佳协作传输方法和在包括基站和移动终端的通信网络中具有多天线的基站。 本发明可以提供最优协作传输方法，其包括：生成基站的信号以最大化由基站预期的接收终端的安全传输的步骤; 以及生成协作节点的最佳干扰信号的步骤。
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公开(公告)号：KR101403039B1
公开(公告)日：2014-06-11
申请号：KR1020130015798
申请日：2013-02-14
Applicant: 한국과학기술원
Abstract: 노드 장치는 신호에 대한 전파방해(jamming) 신호를 생성하되, 신호는 기지국으로부터 신호의 수신이 의도된(intended) 수신 장치와 신호의 수신이 비 의도된(unintended) 수신 장치로 전송되는 것인, 전파방해 신호 생성부, 의도된 수신 장치에서의 전파방해 신호의 수신 전력 크기를 고려하여 전파방해 신호의 빔포밍 벡터를 결정하는 빔포밍 벡터 결정부, 결정된 빔포밍 벡터에 기초하여 전파방해 신호를 전송하는 전송부를 포함한다.
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Patent Agency Ranking
公开(公告)号：KR1020140046969A
公开(公告)日：2014-04-21
申请号：KR1020130015798
申请日：2013-02-14
Applicant: 한국과학기술원
CPC classification number: H03K3/00 , H04B7/0617
Abstract: A node apparatus includes: a jamming signal generation unit for generating a jamming signal to a signal which is transmitted to a receiver intended to receive the signal from a base station and a receiver unintended to receive the signal; a beamforming vector determination unit for determining a beamforming vector of the jamming signal in regards to the magnitude of receiving power of the jamming signal in the intended receiver; and a transmission unit for transmitting the jamming signal on the basis of the determined beamforming vector. [Reference numerals] (101) Jamming signal generation unit; (102) Beamforming vector determination unit; (103) Transmission unit; (104) Database; (105) Receiver selection unit
Abstract translation: 节点装置包括：干扰信号生成单元，用于向发送给接收来自基站的接收机的接收信号的无线信号生成干扰信号; 波束形成向量确定单元，用于根据预期的接收机中的干扰信号的接收功率的大小来确定干扰信号的波束形成向量; 以及传输单元，用于基于所确定的波束形成向量发送所述干扰信号。 （附图标记）（101）干扰信号生成单元; （102）波束成形矢量确定单元; （103）传输单元; （104）数据库; （105）接收机选择单元
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公开(公告)号：KR1020090118717A
公开(公告)日：2009-11-18
申请号：KR1020080044665
申请日：2008-05-14
IPC: H04B7/04
CPC classification number: H04L25/03203 , H04L25/03191 , H04L25/0328 , H04L25/03343 , H04L2025/03426 , H04B7/0456 , H04B7/0452
Abstract: PURPOSE: A low complexity precoding device based on vector perturbation in a multi user multi antenna communication system is provided to obtain low complexity and similar performance. CONSTITUTION: A reference value of a cumulative branch metric of a candidate symbol is determined(S1). A candidate having a cumulative branch metric value is removed. The cumulative branch metric value exceeds the reference value of a cumulative branch metric value of a determined candidate symbol. The cumulative branch metric value of the candidate symbol is registered as entry(S2). The cumulative branch metric value of the candidate symbol does not exceed the reference value of a cumulative branch metric value of the candidate symbol. A cumulative branch metric value of the smallest candidate symbol among cumulative branch metric values registered as entry is selected(S3).
Abstract translation: 目的：提供一种基于多用户多天线通信系统中矢量扰动的低复杂度预编码设备，以获得低复杂度和类似性能。 构成：确定候选符号的累积分支量度的参考值（S1）。 具有累积分支量度值的候选者被去除。 累积分支度量值超过确定的候选符号的累积分支量度值的参考值。 候选符号的累积分支量度值被登记为条目（S2）。 候选符号的累积分支度量值不超过候选符号的累积分支量度值的参考值。 选择登记为条目的累积分支度量值中的最小候选符号的累积分支量度值（S3）。
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公开(公告)号：KR1020090056690A
公开(公告)日：2009-06-03
申请号：KR1020070123944
申请日：2007-11-30
CPC classification number: H04B7/0456 , H04B7/0626 , H04B7/0628
Abstract: A method for detecting a signal when the CCI exists in a CIOD(Coordinate Interleaved Orthogonal Design)-OFDM(Orthogonal Frequency Division Multiplexing) system and a system therefor are provided to remove the CCI efficiently after performing the QR disassembly on a channel matrix. A Fourier transformation unit(30) receives signals transmitted from a plurality of transmission antennas and then performs the Fourier transformation. A channel estimator(50) estimates a channel through which a signal is transmitted. A detection unit(60) applies the QR disassembly to the estimated frequency side channel matrix, and detects a signal in which the CCI(Co-Channel Interference) is removed according to the ML(Maximum Likelihood) detection scheme by using the R matrix corresponding to the QR disassembly result.
Abstract translation: 在CCOD（坐标交错正交设计）-OFDM（正交频分复用）系统及其系统中存在CCI时检测信号的方法被提供以在对信道矩阵执行QR解组之后有效地去除CCI。 傅立叶变换单元（30）接收从多个发送天线发送的信号，然后执行傅里叶变换。 信道估计器（50）估计发送信号的信道。 检测单元（60）将QR分解应用于估计的频率侧信道矩阵，并根据ML（最大似然）检测方案，通过使用相应的R矩阵来检测消除了CCI（Co-Channel Interference）的信号 到QR反汇编结果。
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公开(公告)号：KR101268730B1
公开(公告)日：2013-06-04
申请号：KR1020110106745
申请日：2011-10-19
Applicant: 한국과학기술원
IPC: H04K1/02
Abstract: 주파수 재사용 기법을 활용한 물리계층 보안 강화 시스템 및 방법이 개시된다. CR(Cognitive Radio) 네트워크에서 주파수 재사용 기법을 이용하여 물리계층의 보안을 강화하는 장치는 상기 주파수 재사용 기법을 통한 신호 송신을 이용하여 1차 송신기(primary Tx)로부터 1차 수신기(primary Rx)로 전송되는 신호를 도청하는 도청기의 도청 신호에 대해 간섭을 발생시킴으로써 상기 1차 수신기로 전송되는 신호의 보안을 강화할 수 있다.
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公开(公告)号：KR1020130042713A
公开(公告)日：2013-04-29
申请号：KR1020110106745
申请日：2011-10-19
Applicant: 한국과학기술원
IPC: H04K1/02
Abstract: PURPOSE: A physical layer security reinforcement system and a method thereof are provided to generate interference for a wiretapping signal of a wiretapping device by using a signal transmitted from a second transmitter through a frequency reuse method. CONSTITUTION: A first receiver(310) receives a signal transmitted from a first transmitter. A wiretapping device(330) wiretaps a signal transmitted from the first transmitter to the first receiver. A second transmitter(340) reinforces the security of a signal transmitted to the first receiver by generating interference for a wiretapping signal of the wiretapping device by using signal transmission through a frequency reuse method. A second receiver(350) receives the signal transmitted from the second transmitter.
Abstract translation: 目的：提供物理层安全加强系统及其方法，通过使用通过频率重用方法从第二发射机发送的信号来产生窃听设备的窃听信号的干扰。 构成：第一接收机（310）接收从第一发射机发送的信号。 窃听设备（330）将从第一发射机发射的信号窃听到第一接收机。 第二发射机（340）通过使用通过频率重用方法的信号传输，通过产生对窃听装置的窃听信号的干扰来增强发送到第一接收机的信号的安全性。 第二接收机（350）接收从第二发射机发送的信号。
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