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    • 1. 发明公开
    • 다중반송파 코드분할 다중접속에서의 스크램블링 시스템및 방법, 그 프로그램이 저장된 기록매체
    • 多载波CDMA和记录媒体存储程序中的屏蔽系统和方法
    • KR1020040056473A
    • 2004-07-01
    • KR1020020082858
    • 2002-12-23
    • 한국전자통신연구원브이케이 주식회사
    • 최권휴강군석김수영오덕길
    • H04J13/10
    • H04L27/2621H04B1/707H04B2201/70706H04L5/0021H04L25/03866H04L27/2602
    • PURPOSE: A scrambling system and method in a multi-carrier CDMA and a recording medium storing its program are provided to reduce a PARR(Peak-to-Average Power Ratio) by changing a scrambling code according to user's combination of orthogonal codes. CONSTITUTION: A symbol modulator modulates a bit sequence of the kth user into symbols(S1), and a multiplier multiplies each modulated symbols to an orthogonal code to spread it to a chip sequence(S2). An adder adds the spread chip sequences in synchronization with a symbol timing, and an interleaver performs interleaving on chip sequences of M number of symbols to be transmitted and aligns chips making the same symbols at M-chip intervals(S3). A serial/parallel converter converts the aligned chip sequences into a parallel chip signal having the number of sub-carriers(S4), and a scrambling chip vector generator and a multiplier multiply the parallel chip signal to a scrambling code and transmit it to an inverse Fourier converter(S5). The inverse Fourier converter, the parallel/serial converter and a guard time inserting unit modulate one chip of each sub-carrier to generate a multi-carrier signal, and output it(S6).
    • 目的:提供多载波CDMA和存储其程序的记录介质中的加扰系统和方法,以通过根据用户的正交码组合改变扰码来降低PARR(峰值平均功率比)。 构成:符号调制器将第k个用户的比特序列调制成符号(S1),并且乘法器将每个调制符号乘以正交码以将其扩展到码片序列(S2)。 加法器将码片序列与符号定时同步地相加,并且交织器对要发送的M个码元的码片序列执行交织,并且以M码片间隔对准使相同符号的码片(S3)。 串行/并行转换器将对准的码片序列转换成具有子载波数的并行码片信号(S4),并且加扰码片矢量发生器和乘法器将并行码片信号乘以扰码并将其发送到反相 傅里叶变换器(S5)。 逆傅立叶变换器,并行/串行转换器和保护时间插入单元调制每个子载波的一个芯片以产生多载波信号并输出​​(S6)。
    • 5. 发明授权
    • 다지점 공동 전송에 의한 이동 위성 통신 방법 및 장치
    • 通过协调多点传输进行移动卫星通信的方法及其装置
    • KR101329062B1
    • 2013-11-14
    • KR1020100025152
    • 2010-03-22
    • 한국전자통신연구원
    • 김희욱강군석안도섭이호진
    • H04W16/02H04W84/06H04J11/00
    • 본 발명은 다지점 공동 전송에 의한 이동 위성 통신 방법 및 장치에 관한 것이다. 본 발명의 위성 통신 방법은, 단말의 위치를 파악하는 단계; 상기 단말의 위치를 이용하여 상기 단말에 대한 신호 전송 방식을 결정하는 단계; 상기 단말의 위치를 이용하여 상기 단말에 신호를 전송할 부반송파 영역을 결정하는 단계; 및 상기 신호 전송 방식 및 상기 부반송파 영역을 이용하여 상기 단말과 통신하는 단계를 포함하되, 상기 부반송파 영역을 결정하는 단계는, 전체 부반송파 영역을 2 이상의 서로 다른 부반송파 영역으로 구분하는 단계; 빔의 경계 지역을 2 이상의 서로 다른 경계 지역으로 구분하는 단계; 상기 전체 부반송파 영역을 상기 빔의 중앙 지역에 할당하고, 상기 2 이상의 서로 다른 부반송파 영역을 상기 2 이상의 서로 다른 경계 지역에 각각 할당하는 단계; 및 상기 단말이 위치한 지역에 할당된 부반송파 영역을 상기 부반송파 영역으로 결정하는 단계를 포함한다.
    • 6. 发明公开
    • 확장 시퀀스 생성 방법 및 이를 이용한 무선 송수신 장치 및 방법
    • 用于产生扩展序列的方法和无线传输/接收方法和使用该方法的装置
    • KR1020130073623A
    • 2013-07-03
    • KR1020110141576
    • 2011-12-23
    • 한국전자통신연구원
    • 남승현김희욱홍태철강군석구본준안도섭
    • H04J11/00H04J13/10
    • H04L27/2605H04J11/00H04J13/0059H04L27/2615H04W74/0833
    • PURPOSE: A generating method of an extended sequence, a radio transmitter-receiver thereof, and a method thereof are provided to reduce interference among sequences, and to improve detection performance. CONSTITUTION: A radio transmitter (900) comprises: a sequence extender (930), a preamble generator (950), and a transmitter (970). The sequence extender comprises: a sequence generator (933), a circulating transition unit (935), and an operation unit (937). The sequence extender generates an extended sequence by adding up more than two sequences. The sequence generator produces more than two CAZACs (Constant Amplitude Zero Auto-Correlation). The circulating transition unit transits more than two CAZAC sequences produced by the sequence generator respectively. The operation unit produces an extended sequence by adding up the transited CAZAC sequences. The preamble generator produces a preamble by using the extended sequence. The transmitter transmits the preamble. [Reference numerals] (930) Sequence extender; (933) Sequence generator; (935) Circulating transition unit; (937) Operation unit; (950) Preamble generator; (970) Transmitter
    • 目的:提供扩展序列的生成方法,其无线电发射机 - 接收机及其方法,以减少序列之间的干扰,并提高检测性能。 构成:无线电发射机(900)包括:序列扩展器(930),前导码生成器(950)和发射机(970)。 序列扩展器包括:序列发生器(933),循环转移单元(935)和操作单元(937)。 序列扩展器通过相加多于两个序列生成扩展序列。 序列发生器产生两个以上的CAZAC(恒幅零自相关)。 循环转移单元分别转换由序列发生器产生的多于两个的CAZAC序列。 操作单元通过将转移的CAZAC序列相加来产生扩展序列。 前导码生成器通过使用扩展序列产生前导码。 发射机发送前导码。 (附图标记)(930)序列扩展器; (933)序列发生器; (935)循环过渡单位; (937)操作单元; (950)前导码发生器; (970)变送器
    • 7. 发明公开
    • 심볼 인터리버를 이용한 통신 방법 및 장치
    • 使用符号交互的通信方法和设备
    • KR1020120040554A
    • 2012-04-27
    • KR1020100102029
    • 2010-10-19
    • 한국전자통신연구원전북대학교산학협력단
    • 홍태철김희욱남승현강군석구본준안도섭여성문김수영
    • H03M13/27H04W84/06
    • H04L1/0071H03M13/2732H03M13/6508H03M13/6525H04L1/0033H04L1/0041
    • PURPOSE: A communication method using symbol interleaving and an apparatus thereof are provided to reduce a data transmission error when AMC(Adaptive Modulation and Coding) is used in an LTE(Long Term Evolution) base satellite communication system. CONSTITUTION: An information exchange unit(110) receives memory information and service information from a terminal device(200). An interleaver use determination unit(120) determines the active condition of an interleaver based on the service information. An interleaver information determination unit(130) determines interleaver information based on resource allocation type information and the memory information. An encoding unit(140) modulates and encodes data. A symbol interleaver(150) interleaves data, which is encoded by using the interleaver information, by symbol. A data transmission unit(160) transmits the data interleaved by the symbol to a terminal.
    • 目的:提供使用符号交织的通信方法及其装置,以在LTE(长期演进)基础卫星通信系统中使用AMC(自适应调制和编码)时减小数据传输错误。 构成:信息交换单元(110)从终端设备(200)接收存储器信息和服务信息。 交织器使用确定单元(120)基于服务信息确定交织器的活动状态。 交织信息确定单元(130)基于资源分配类型信息和存储器信息来确定交织器信息。 编码单元(140)对数据进行调制和编码。 符号交织器(150)通过符号对使用交织器信息进行编码的数据进行交织。 数据发送单元(160)将通过符号交替的数据发送到终端。
    • 8. 发明公开
    • 위성 통신 시스템에서 서비스 제공 시스템 및 방법
    • 用于在卫星通信系统中提供服务的系统和方法
    • KR1020110022526A
    • 2011-03-07
    • KR1020100052257
    • 2010-06-03
    • 한국전자통신연구원
    • 김희욱강군석안도섭이호진
    • H04W84/06H04W16/32H04W16/28H04B7/155
    • H04B7/2041H04B7/1851Y02D70/10H04W72/0486H04W16/28H04W16/32H04W72/0453H04W72/046H04W72/0473H04W84/06
    • PURPOSE: A service providing system in a satellite communication system by allocating resources and power to hierarchical antenna multi beams, and a method thereof are provided to improve the efficiency in the use of power by reducing the power consumption of a system. CONSTITUTION: A service providing system in a satellite communication system includes a satellite(102), a first terminal(170), a gateway(104), a core network(106), an access network(110), a BS(Base Station)(108), a CGC(Complementary Ground Component)(132), and a plurality of terminals. The satellite is a satellite BS configured to provide a communication service by using hierarchical multi-beams. The first terminal is located in a suburb to receive the communication service from the satellite. The gateway is configured to connect signal transmission and reception between the satellite and a terrestrial system. The core network is included in the terrestrial system and configured to transmit and receive signals to and from the satellite through the gateway. The gateway is a centralized gateway or one gateway of geographically distributed gateways, depending on the satellite communication system or requirements from an operator of the satellite communication system. The gateway is connected to the BS as a sub system which is connected to the core network or the access network. In the satellite communication system, the satellite forms the hierarchical multi-beams through an MIMO(Multi-Input Multi-Output) scheme in which one satellite uses a polarization characteristic of an antenna, or a plurality of satellites form the hierarchical multi-beams and transmit a signal to provide a communication service. Accordingly, the data transmission capacity may be increased, and the data reception function may be improved.
    • 目的:通过为分层天线多波束分配资源和功率,提供卫星通信系统中的服务提供系统,并提供其方法,以通过降低系统的功耗来提高功率使用的效率。 构成:卫星通信系统中的服务提供系统包括卫星(102),第一终端(170),网关(104),核心网络(106),接入网络(110),基站 )(108),CGC(互补地面分量)(132)和多个终端。 该卫星是被配置为通过使用分层多波束提供通信服务的卫星BS。 第一个终端位于郊区,从卫星接收通信服务。 网关被配置为连接卫星和地面系统之间的信号传输和接收。 核心网络包括在地面系统中,并配置为通过网关向卫星发送和接收信号。 网关是地理分布式网关的集中式网关或一个网关,这取决于卫星通信系统或卫星通信系统运营商的要求。 网关作为连接到核心网或接入网的子系统连接到BS。 在卫星通信系统中,卫星通过MIMO(多输入多输出)方案形成分层多波束,其中一个卫星使用天线的极化特性,或者多个卫星形成分级多波束, 发送信号以提供通信服务。 因此,可以增加数据传输容量,并且可以提高数据接收功能。
    • 10. 发明公开
    • 이동 통신 시스템에서 간섭 제거 방법
    • 移动通信系统干扰消除方法
    • KR1020090065164A
    • 2009-06-22
    • KR1020070132623
    • 2007-12-17
    • 한국전자통신연구원
    • 김병기강군석안도섭이호진
    • H04L27/26H04B15/00H04B7/26
    • H04L1/0003H04L1/0015H04L1/0606H04L1/0668H04L5/0007H04L25/03821H04L27/2626H04L25/085H04L27/2688
    • A method for removing an inter-carrier interference in a mobile communication system is provided to remove an inter-carrier interference by reducing a frequency offset according to a channel state. A transmitting part generates a control signal(S101). The transmitting part transmits a control signal through a wireless channel(S103). A receiving part checks a generating state of a frequency offset of the received control signal(S105). The receiving part estimates a channel state and a SNR(Signal to Noise Ratio)(S107). The receiving part generates feedback information including a channel quality indicator corresponding to the estimated channel state and the SNR(S109). The receiving part transmits the feedback information to the transmitting part through a wireless channel(S111). The transmitting part predicts a channel state about the wireless channel(S113). The transmitting part generates an OFDM(Orthogonal Frequency Division Multiplexing) signal(S115). The transmitting part transmits the OFDM signal to the receiving part(S117). The transmitting part determines an excessive state of a coherence time(S119). The transmitting part checks an additional transmission(S121).
    • 提供一种去除移动通信系统中的载波间干扰的方法,以通过根据信道状态减少频率偏移来消除载波间干扰。 发送部生成控制信号(S101)。 发送部通过无线信道发送控制信号(S103)。 接收部检查接收到的控制信号的频率偏移的生成状态(S105)。 接收部估计信道状态和SNR(信噪比)(S107)。 所述接收部生成反馈信息,所述反馈信息包括与所估计的信道状态和所述SNR对应的信道质量指标(S109)。 接收部通过无线信道将反馈信息发送给发送部(S111)。 发送部分预测关于无线信道的信道状态(S113)。 发送部生成OFDM(正交频分复用)信号(S115)。 发送部将OFDM信号发送到接收部(S117)。 发送部确定相干时间的过度状态(S119)。 发送部检查附加发送(S121)。