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29 条记录 (耗时 0.017 秒)

    Transmitting and receiving apparatus and method in an orthogonal frequency division multiplexing system using an insufficient cyclic prefix
    11.
    发明公开
    Transmitting and receiving apparatus and method in an orthogonal frequency division multiplexing system using an insufficient cyclic prefix 审中-公开
    装置和方法用于与不足，zyclischen扩展传输和接收在OFDM通信系统

    公开(公告)号：EP1496659A1

    公开(公告)日：2005-01-12

    申请号：EP04014868.6

    申请日：2004-06-24

    申请人： Samsung Electronics Co., Ltd. ,  Postech Foundation

    发明人： Lee, Jong-Hyeuk ,  Kim, Yung-soo ,  Im, Gi-Hong ,  Won, Hui-Chul ,  Park, Cheol-Jin

    IPC分类号： H04L27/26

    CPC分类号： H04L5/006 ,  H04L5/0007 ,  H04L5/0046 ,  H04L2025/03414

    摘要： A preprocessing apparatus and method for a transmitter and a receiver to prevent system performance degradation caused by Inter-Channel Interference (ICI) or inter-symbol interference (ISI) in an OFDM system. In the OFDM system using N carriers having different frequency bands and K carriers of the N carriers designated as redundant carriers, the transmitter renders ICI-causing parts to be zeroes in a data frame, when a cyclic prefix is not longer than a channel impulse response. Therefore, the ICI is prevented. The receiver eliminates the ISI involved in a current frame using an interference estimated from a previous data frame. Therefore, noise spread caused by the use of redundant carriers is prevented and system complexity is remarkably reduced.

    摘要翻译： 使用具有不同频带的N个载波中的预处理装置和方法，用于在发送器和接收器，以防止通过在OFDM系统信道间干扰（ICI）或符号间干扰（ISI）引起的系统性能的下降。在OFDM系统中，并 指定为冗余载波的N个载波的K个载波中，发射器使得ICI-导致部件是在一个数据帧，零当循环前缀不大于信道脉冲响应长。 因此，ICI被阻止。 该接收机消除了ISI使用在来自先前帧的数据所估计的干扰以设置currentFrame参与。 因此，通过使用冗余载波的噪声引起的扩散，防止和系统的复杂性显着降低。

    Filter-bank-modulation-based multiple access technique
    13.
    发明公开
    Filter-bank-modulation-based multiple access technique 审中-公开
    多址技术基于滤波器组调制

    公开(公告)号：EP1603295A3

    公开(公告)日：2008-03-26

    申请号：EP05012029.4

    申请日：2005-06-03

    申请人： SAMSUNG ELECTRONICS CO., LTD. ,  Postech Foundation

    发明人： Kim, Eung-Sun ,  Lee, Jong-Hyeuk ,  Im, Gi-Hong, Dept. of Electronic & Electrical Eng ,  Park, Cheol-Jin, Dept. of Electronic & Elect. Eng.

    IPC分类号： H04L27/26

    CPC分类号： H04L27/264 ,  H04L27/2634

    摘要： Disclosed is a multicarrier-based wireless communication system including a base station for providing a multiple access service to terminals which filter multitone transmitting signals through filters and transmit the filtered signals. A transmitter of the respective terminals includes a multiplexer for multiplexing an input signal and outputting the signal as a plurality of transmitting signals, at least one filter bank for filtering the plurality of transmitting signals, an inverse fast Fourier transformer for executing inverse fast Fourier transform of the filtered transmitting signals output from the filter bank, and a filter information generator for providing filter information to the filter bank. Since the transmitter of the present invention distinguishes users from each other by a filter and thus no synchronization is required between users, which causes a problem in an uplink of the multicarrier-based wireless communication system, system performance can be expected to be improved.

    Apparatus and method for communicating data in hybrid diversity mode in broadband wireless communication system
    18.
    发明公开
    Apparatus and method for communicating data in hybrid diversity mode in broadband wireless communication system 审中-公开
    Vorrichtung und Verfahren zur Datenkommunikation in hybridemDiversitätsmodusin einem drahtlosen Breitbandkommunikationssystem

    公开(公告)号：EP1806893A2

    公开(公告)日：2007-07-11

    申请号：EP07100045.9

    申请日：2007-01-03

    申请人： Samsung Electronics Co., Ltd.

    发明人： Lee, Jong-Hyeuk ,  Cho, Myeon-Kyun ,  Nam, Seung-Hoon ,  Jung, Bang-Chul ,  Sung, Dan-Keun ,  Cho, Sung-Soo ,  Hong, Young-Jun

    IPC分类号： H04L27/26 ,  H04L1/02

    CPC分类号： H04L5/006 ,  H04L1/02 ,  H04L5/0007 ,  H04L5/0044

    摘要： Provided is an apparatus and method for communicating data in a hybrid diversity mode in a broadband wireless communication system. In a method for transmitting data to a subscriber station (SS) in the broadband wireless communication system, null subbands are determined using feedback information received from the SS. TX data to be transmitted to the SS are mapped to a diversity zone from which the null subbands has been excluded. The mapped data are OFDM-modulated and transmitted to the SS. In this way, frequency subbands with poor channel conditions are excluded from data transmission. Accordingly, it is possible to enhance the FER performance and transmit data at a high MCS level.

    摘要翻译： 提供了一种用于在宽带无线通信系统中以混合分集模式传送数据的装置和方法。 在宽带无线通信系统中向用户台（SS）发送数据的方法中，使用从SS接收到的反馈信息来确定空子带。 要发送到SS的TX数据被映射到已经排除了空子带的分集区域。 映射的数据被OFDM调制并传输到SS。 以这种方式，信道条件较差的频率子带从数据传输中排除。 因此，可以提高FER性能并在高MCS级别发送数据。