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    • 147. 发明公开
    • METHOD FOR TRANSMITTING SIGNAL IN SATELLITE COMMUNICATION SYSTEM WITH TERRESTRIAL COMPONENT
    • 卫星通信系统信号传输方法
    • KR20090062904A
    • 2009-06-17
    • KR20070130388
    • 2007-12-13
    • KOREA ELECTRONICS TELECOMM
    • KANG YEON SUKANG KUN SEOKAHN DO SEOBLEE HO JIN
    • H04B7/185
    • H04L1/0668
    • A method for transmitting a signal in a satellite communication system with a terrestrial assistant device is provided to apply space-time coding techniques, thereby improving receiving signal quality of an area where a signal of satellite or terrestrial assistant devices can be received. A core network produces the first symbol index and the second symbol index about the first transmission signal and the second transmission signal(S100). The core network generates the first and second transmission data symbols which are alpha and beta(S120). A space-time code is generated based on the first and second symbol indexes and the first and second transmission data symbols(S130). After the space-time code is transmitted to a satellite, the code is transmitted to a terminal through a terrestrial assistant device or transmitted to the terminal from the satellite.
    • 提供了一种用于在具有地面辅助设备的卫星通信系统中发送信号的方法以应用空时编码技术,从而提高可以接收卫星或地面辅助设备的信号的区域的接收信号质量。 核心网络产生关于第一传输信号和第二传输信号的第一符号索引和第二符号索引(S100)。 核心网络生成α和β的第一和第二传输数据符号(S120)。 基于第一和第二符号索引以及第一和第二传输数据符号产生时空代码(S130)。 在将空时代码发送到卫星之后,通过地面辅助设备将码发送到终端,或者从卫星发送到终端。
    • 148. 发明公开
    • 송신 장치 및 방법과, 수신 장치 및 방법
    • 发送装置和方法,以及接收装置和方法
    • KR1020090061596A
    • 2009-06-16
    • KR1020080125288
    • 2008-12-10
    • 소니 주식회사
    • 슈타델마이어,로타쉴,디트마르슈나이더,다니엘
    • H04L27/26H04J11/00
    • H04L1/0668H04H20/46H04H20/72H04L1/0071H04L1/0606H04L1/0643H04L5/0023H04L5/0044H04L5/0048H04L5/006H04L2001/0093H04N21/2383H04N21/4382H04L27/2611H04L25/0224H04L27/2627H04L27/2649
    • An apparatus and a method for transmitting data through an OFDM(Orthogonal Frequency Division Multiplexed) symbol are provided to be used in an MISO(Multiple-In Single-Out) OFDM method for DVB-T2(Digital Video Broadcasting-Terrestrial) by freely spreading a pilot symbol subcarrier in the OFDM symbol. Data to be transmitted is received in a bit into constellation mapper(28). A pair of data symbols are formed. A pair of first modulation symbols are generated for a pair of data symbols respectively. The pair of data modulation symbols form a first modulation symbol and a second modulation symbol of an alamouti cell. An OFDM symbol of a first version is formed by modulating subcarriers allocated for transmitting the data to the first and second modulation symbols of the alamouti cell. One or more pilot subcarriers of the OFDM symbol of the first version are modulated according to the predetermined pattern. The pair of second modulation symbols are generated for the pair of data symbols respectively. The OFDM symbol of a second version is formed by modulating the subcarrier to the third and fourth modulation symbols of the alamouti cell. The OFDM symbol of the first version is transmitted through a first antenna(112). The OFDM symbol of the second version is transmitted through a second antenna(114).
    • 提供了一种通过OFDM(正交频分复用)符号发送数据的装置和方法,用于通过自由扩展的DVB-T2(地面数字视频广播)的MISO(Multiple-In Single-Out)多路复用OFDM方法 OFDM符号中的导频符号子载波。 要发送的数据被一点一点地接收到星座映射器(28)中。 形成一对数据符号。 对于一对数据符号分别生成一对第一调制符号。 该对数据调制符号形成第一调制符号和alamouti信元的第二调制符号。 通过将分配的用于发送数据的子载波调制到该alamouti信元的第一和第二调制符号来形成第一版本的OFDM符号。 根据预定模式调制第一版本的OFDM符号的一个或多个导频副载波。 分别为该对数据符号生成一对第二调制符号。 第二版本的OFDM符号通过将子载波调制到该alamouti信元的第三和第四调制符号而形成。 通过第一天线(112)发送第一版本的OFDM符号。 通过第二天线(114)发送第二版本的OFDM符号。