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    System and method for channel estimation in an OFDM mobile communication system
    1.
    发明申请
    System and method for channel estimation in an OFDM mobile communication system 有权
    OFDM移动通信系统中信道估计的系统和方法

    公开(公告)号：US20050007983A1

    公开(公告)日：2005-01-13

    申请号：US10840584

    申请日：2004-05-06

    申请人： Jong-Hyeuk Lee ,  Yung-Soo Kim ,  Gi-Hong Im ,  Hui-Chul Won ,  Cheol-Jin Park

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

    IPC分类号： H04J11/00 ,  H04B7/06 ,  H04L1/06 ,  H04L25/02 ,  H04L27/26 ,  H04Q7/00

    CPC分类号： H04L27/2602 ,  H04B7/0669 ,  H04L1/0618 ,  H04L25/0204 ,  H04L25/022

    摘要： A mobile communication system, a transmitter includes a first transmission antenna and a second transmission antenna, and the first and second transmission antennas transmit signals through at least one odd carrier and at least one even carrier. The transmitter determines a first symbol and a second symbol to be used for initial channel estimation of a receiver, encodes the first symbol and the second symbol by a preset transmit diversity scheme for a preset time, and transmits the encoded first and second symbols to the receiver through odd carriers and even carriers of the first transmission antenna and the second transmission antenna. The receiver receives a signal for the preset period, estimates channel frequency responses of odd carriers of the first transmission antenna and channel frequency responses of even carriers of the second transmission antenna, and estimates channel frequency responses of even carriers of the first transmission antenna and channel frequency responses of odd carriers of the second transmission antenna by using the estimated channel frequency responses.

    摘要翻译： 移动通信系统，发射机包括第一发射天线和第二发射天线，第一和第二发射天线通过至少一个奇数载波和至少一个偶数载波发射信号。 发射机确定要用于接收机的初始信道估计的第一符号和第二符号，通过预设的发射分集方案对第一符号和第二符号进行预设时间编码，并将编码的第一和第二符号发送到 接收机通过第一发射天线和第二发射天线的奇数载波和偶数载波。 接收机接收预设周期的信号，估计第一发射天线的奇数载波的信道频率响应和第二发射天线的偶数载波的信道频率响应，并估计第一发射天线和信道的偶数载波的信道频率响应 通过使用估计的信道频率响应对第二发射天线的奇数载波的频率响应。

    Transmitting and receiving apparatus and method in an Orthogonal Frequency Division Multiplexing system using an insufficient cyclic prefix
    2.
    发明申请
    Transmitting and receiving apparatus and method in an Orthogonal Frequency Division Multiplexing system using an insufficient cyclic prefix 审中-公开
    在正交频分复用系统中使用不充分的循环前缀的发送和接收设备和方法

    公开(公告)号：US20050008085A1

    公开(公告)日：2005-01-13

    申请号：US10846465

    申请日：2004-05-14

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

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

    IPC分类号： H04J11/00 ,  H04L25/03 ,  H04L27/26 ,  H04K1/10

    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： 一种用于在OFDM系统中防止由信道间干扰（ICI）或符号间干扰（ISI）引起的系统性能下降的发射机和接收机的预处理装置和方法。 在使用具有不同频带的N个载波的OFDM系统和指定为冗余载波的N个载波的K个载波的情况下，当循环前缀不长于信道脉冲响应时，发射机在数据帧中使ICI引起的部分为零 。 因此，ICI被阻止。 接收器使用从先前数据帧估计的干扰消除了当前帧中涉及的ISI。 因此，防止使用冗余载波引起的噪声扩展，并且系统复杂度显着降低。

    System and method for channel estimation in an OFDM mobile communication system
    3.
    发明授权
    System and method for channel estimation in an OFDM mobile communication system 有权
    OFDM移动通信系统中信道估计的系统和方法

    公开(公告)号：US07307974B2

    公开(公告)日：2007-12-11

    申请号：US10840584

    申请日：2004-05-06

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

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

    IPC分类号： H04Q7/00

    CPC分类号： H04L27/2602 ,  H04B7/0669 ,  H04L1/0618 ,  H04L25/0204 ,  H04L25/022

    摘要： A mobile communication system, a transmitter includes a first transmission antenna and a second transmission antenna, and the first and second transmission antennas transmit signals through at least one odd carrier and at least one even carrier. The transmitter determines a first symbol and a second symbol to be used for initial channel estimation of a receiver, encodes the first symbol and the second symbol by a preset transmit diversity scheme for a preset time, and transmits the encoded first and second symbols to the receiver through odd carriers and even carriers of the first transmission antenna and the second transmission antenna. The receiver receives a signal for the preset period, estimates channel frequency responses of odd carriers of the first transmission antenna and channel frequency responses of even carriers of the second transmission antenna, and estimates channel frequency responses of even carriers of the first transmission antenna and channel frequency responses of odd carriers of the second transmission antenna by using the estimated channel frequency responses.

    摘要翻译： 移动通信系统，发射机包括第一发射天线和第二发射天线，第一和第二发射天线通过至少一个奇数载波和至少一个偶数载波发射信号。 发射机确定要用于接收机的初始信道估计的第一符号和第二符号，通过预设的发射分集方案对第一符号和第二符号进行预设时间编码，并将编码的第一和第二符号发送到 接收机通过第一发射天线和第二发射天线的奇数载波和偶数载波。 接收机接收预设周期的信号，估计第一发射天线的奇数载波的信道频率响应和第二发射天线的偶数载波的信道频率响应，并估计第一发射天线和信道的偶数载波的信道频率响应 通过使用估计的信道频率响应对第二发射天线的奇数载波的频率响应。

    Apparatus and method for channel estimation and cyclic prefix reconstruction in an OFDM-STBC mobile communication system
    6.
    发明授权
    Apparatus and method for channel estimation and cyclic prefix reconstruction in an OFDM-STBC mobile communication system 有权
    OFDM-STBC移动通信系统中的信道估计和循环前缀重构的装置和方法

    公开(公告)号：US07586992B2

    公开(公告)日：2009-09-08

    申请号：US11335268

    申请日：2006-01-19

    申请人： Jong-Hyung Kwun ,  Eung-Sun Kim ,  Jong-Hyeuk Lee ,  Gi-Hong Im ,  Hui-Chul Won

    发明人： Jong-Hyung Kwun ,  Eung-Sun Kim ,  Jong-Hyeuk Lee ,  Gi-Hong Im ,  Hui-Chul Won

    IPC分类号： H04L1/02

    CPC分类号： H04L1/0631 ,  H04L1/0048 ,  H04L1/005 ,  H04L25/0212 ,  H04L25/03006 ,  H04L27/2607 ,  H04L2025/03617

    摘要： An apparatus and method for channel estimation and CP reconstruction in an OFDM-STBC mobile communication system are provided. An ISI canceller cancels ISI signal components from first and second received symbol sequences. A cyclicity restorer cancels ICI signal components from the ISI-cancelled first received symbol sequence and the ISI-cancelled second received symbol sequence. A recoverer acquires the recovered sequence estimates of the ICI-cancelled first received symbol sequence and the ICI-cancelled second received symbol sequence by decoding. The ICI cancellation of the ISI-cancelled first and second received symbol sequences and the ISI cancellation of the second received symbol sequence are iterated a predetermined number of times.

    摘要翻译： 提供了一种在OFDM-STBC移动通信系统中用于信道估计和CP重构的装置和方法。 ISI消除器从第一和第二接收符号序列中取消ISI信号分量。 循环恢复器从ISI取消的第一接收符号序列和ISI取消的第二接收符号序列中取消ICI信号分量。 恢复器通过解码获取ICI取消的第一接收符号序列和ICI取消的第二接收符号序列的恢复序列估计。 ISI取消的第一和第二接收符号序列的ICI消除和第二接收符号序列的ISI消除被重复预定次数。

    Apparatus and method for receiving signals in an OFDM communication system
    8.
    发明授权
    Apparatus and method for receiving signals in an OFDM communication system 有权
    在OFDM通信系统中接收信号的装置和方法

    公开(公告)号：US07450652B2

    公开(公告)日：2008-11-11

    申请号：US10993105

    申请日：2004-11-19

    申请人： Cheol-Jin Park ,  Eung-Sun Kim ,  Jong-Hyeuk Lee ,  Gi-Hong Im ,  Ho-Jin Kim

    发明人： Cheol-Jin Park ,  Eung-Sun Kim ,  Jong-Hyeuk Lee ,  Gi-Hong Im ,  Ho-Jin Kim

    IPC分类号： H04K1/10

    CPC分类号： H04L27/2607 ,  H04L27/2647 ,  H04L2025/03414

    摘要： A receiving apparatus in an OFDM communication system, in which the receiving apparatus includes a serial-to-parallel converter that converts a serial signal received through an antenna to parallel signals. A pre-processor processes an nth symbol converted in the serial-to-parallel converter using an (n−1)th symbol and an (n+1)th symbol. A Fourier transformer Fourier-transforms the output of the pre-processor and an equalizer equalizes a Fourier-transformed signal. A deinterleaver deinterleaves an equalized signal, a decoder decodes a deinterleaved signal, and a parallel-to-serial converter converts parallel decoded signal to a signal stream.

    摘要翻译： OFDM通信系统中的接收装置，其中接收装置包括串行到并行转换器，其将通过天线接收的串行信号转换为并行信号。 预处理器使用第（n-1）个符号和第（n + 1）个符号处理在串行到并行转换器中转换的第n个符号。 傅里叶变换器对预处理器的输出进行傅立叶变换，均衡器对傅立叶变换信号进行均衡。 解交织器对均衡信号进行解交织，解码器对解交织信号进行解码，并行到串行转换器将并行解码信号转换为信号流。

    FBM-based multiple access technique
    9.
    发明申请
    FBM-based multiple access technique 审中-公开
    基于FBM的多址技术

    公开(公告)号：US20050271152A1

    公开(公告)日：2005-12-08

    申请号：US11143040

    申请日：2005-06-02

    申请人： Eung-Sun Kim ,  Jong-Hyeuk Lee ,  Gi-Hong Im ,  Cheol-Jin Park

    发明人： Eung-Sun Kim ,  Jong-Hyeuk Lee ,  Gi-Hong Im ,  Cheol-Jin Park

    IPC分类号： H04J11/00 ,  H04L27/26 ,  H04K1/10

    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.

    摘要翻译： 公开了一种基于多载波的无线通信系统，其包括用于向通过滤波器过滤多频发送信号的终端提供多址服务的基站，并发送经滤波的信号。 各个终端的发射机包括多路复用器，用于多路复用输入信号并输出​​该信号作为多个发送信号，至少一个用于对多个发送信号进行滤波的滤波器组，用于执行快速傅立叶逆变换 从滤波器组输出的经滤波的发送信号，以及用于向滤波器组提供滤波器信息的滤波器信息发生器。 由于本发明的发射机通过滤波器将用户彼此区分，因此在用户之间不需要同步，这导致基于多载波的无线通信系统的上行链路中的问题，可以期望提高系统性能。

    Apparatus and method for receiving signals in an OFDM communication system
    10.
    发明申请
    Apparatus and method for receiving signals in an OFDM communication system 有权
    在OFDM通信系统中接收信号的装置和方法

    公开(公告)号：US20050157802A1

    公开(公告)日：2005-07-21

    申请号：US10993105

    申请日：2004-11-19

    申请人： Cheol-Jin Park ,  Eung-Sun Kim ,  Jong-Hyeuk Lee ,  Gi-Hong Im ,  Ho-Jin Kim

    发明人： Cheol-Jin Park ,  Eung-Sun Kim ,  Jong-Hyeuk Lee ,  Gi-Hong Im ,  Ho-Jin Kim

    IPC分类号： H04J11/00 ,  H04L25/03 ,  H04L27/26 ,  H04L27/28

    CPC分类号： H04L27/2607 ,  H04L27/2647 ,  H04L2025/03414

    摘要： A receiving apparatus in an OFDM communication system, in which the receiving apparatus includes a serial-to-parallel converter that converts a serial signal received through an antenna to parallel signals. A pre-processor processes an nth symbol converted in the serial-to-parallel converter using an (n−1)th symbol and an (n+1)th symbol. A Fourier transformer Fourier-transforms the output of the pre-processor and an equalizer equalizes a Fourier-transformed signal. A deinterleaver deinterleaves an equalized signal, a decoder decodes a deinterleaved signal, and a parallel-to-serial converter converts parallel decoded signal to a signal stream.

    摘要翻译： OFDM通信系统中的接收装置，其中接收装置包括串行到并行转换器，其将通过天线接收的串行信号转换为并行信号。 预处理器使用第（n-1）个符号和第（n + 1）个符号处理在串行到并行转换器中转换的第n个符号。 傅里叶变换器对预处理器的输出进行傅立叶变换，均衡器对傅立叶变换信号进行均衡。 解交织器对均衡信号进行解交织，解码器对解交织信号进行解码，并行到串行转换器将并行解码信号转换为信号流。