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    Apparatus and method for determining pilot pattern in a broadband wireless access communication system
    52.
    发明申请
    Apparatus and method for determining pilot pattern in a broadband wireless access communication system 有权
    用于在宽带无线接入通信系统中确定导频模式的装置和方法

    公开(公告)号：US20070153931A1

    公开(公告)日：2007-07-05

    申请号：US11647949

    申请日：2006-12-29

    申请人： Jong-Hyeuk Lee ,  Myeon-Kyun Cho ,  Won-Kyu Paik ,  Jong-Soo Seo

    发明人： Jong-Hyeuk Lee ,  Myeon-Kyun Cho ,  Won-Kyu Paik ,  Jong-Soo Seo

    IPC分类号： H04K1/10

    CPC分类号： H04L27/261 ,  H04L1/0001 ,  H04L25/0222

    摘要： An apparatus and method for determining a pilot pattern in a Broadband Wireless Access (BWA) communication system are provided. In the pilot pattern determining method, an Orthogonal Frequency Division Multiplexing (OFDM) demodulator generates frequency-domain data by fast-Fourier-transform (FFT)-processing a received signal. A pilot pattern decider calculates a coherence bandwidth and a coherence time using subcarrier values received from the OFDM demodulator, and selects one of a plurality of pilot patterns according to the ratio of the coherence bandwidth to the coherence time.

    摘要翻译： 提供了一种用于在宽带无线接入（BWA）通信系统中确定导频模式的装置和方法。 在导频模式确定方法中，正交频分复用（OFDM）解调器通过对接收信号进行快速傅立叶变换（FFT）处理来生成频域数据。 导频模式决定器使用从OFDM解调器接收到的子载波值来计算相干带宽和相干时间，并且根据相干带宽与相干时间的比率选择多个导频模式中的一个。

    Transmitting and receiving apparatus and method in an Orthogonal Frequency Division Multiplexing system using an insufficient cyclic prefix
    53.
    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。

    Apparatus and method for reducing peak-to-average power ratio in a wireless communication system
    58.
    发明申请
    Apparatus and method for reducing peak-to-average power ratio in a wireless communication system 有权
    用于降低无线通信系统中的峰均功率比的装置和方法

    公开(公告)号：US20090086848A1

    公开(公告)日：2009-04-02

    申请号：US12286597

    申请日：2008-10-01

    申请人： Seung-Hee Han ,  Jong-Hyeuk Lee ,  Sang-Boh Yun

    发明人： Seung-Hee Han ,  Jong-Hyeuk Lee ,  Sang-Boh Yun

    IPC分类号： H04L27/00

    CPC分类号： H04L5/0023 ,  H04L5/0066 ,  H04L27/2618 ,  H04L27/2623

    摘要： An apparatus is provided for reducing a peak-to-average power ratio (PAPR) in a wireless communication system having multiple transmit antennas. A symbol generator generates symbols to be transmitted via the multiple transmit antennas, and a PAPR calculator calculates a PAPR value for each symbol. A detector detects a maximum PAPR value among the PAPR values of the symbols. A controller outputs a control signal to reduce a PAPR value of a corresponding symbol when the detected maximum PAPR value exceeds a reference PAPR value. A PAPR reducer reduces the PAPR value of the corresponding symbol upon receipt of the control signal.

    摘要翻译： 提供一种用于降低具有多个发射天线的无线通信系统中的峰均功率比（PAPR）的装置。 符号生成器生成要通过多个发送天线发送的符号，PAPR计算器计算每个符号的PAPR值。 检测器检测符号的PAPR值中的最大PAPR值。 当检测到的最大PAPR值超过参考PAPR值时，控制器输出控制信号以减小相应符号的PAPR值。 PAPR减速器在接收到控制信号时降低相应符号的PAPR值。

    Data transmission apparatus and method in an OFDM communication system
    59.
    发明授权
    Data transmission apparatus and method in an OFDM communication system 有权
    OFDM通信系统中的数据发送装置和方法

    公开(公告)号：US07433413B2

    公开(公告)日：2008-10-07

    申请号：US11020532

    申请日：2004-12-23

    申请人： Kyung-Whoon Cheun ,  Joo-Yeol Yang ,  Jong-Hyeuk Lee

    发明人： Kyung-Whoon Cheun ,  Joo-Yeol Yang ,  Jong-Hyeuk Lee

    IPC分类号： H04K1/10

    CPC分类号： H04L27/2628 ,  H04L1/0618 ,  H04L27/2605

    摘要： An apparatus and method for transmitting data on a plurality of frequency sub-channels for a plurality of successive symbol periods through a plurality of transmit antennas in an OFDM system. In the data transmitting apparatus, an S/P converter converts information symbols received from a data source to an information symbol vector, a coder generates at least one code symbol vector using the information symbol vector in at least one symbol period, an IFFT unit generates at least as many transmission signal vectors as twice the number of code symbol vectors generated in the coder for the one symbol period, a plurality of P/S converters each convert the transmission signal vectors to a transmission signal stream, and a guard interval inserter inserts a guard interval into each of the transmission signal streams received from the P/S converters.

    摘要翻译： 一种用于在OFDM系统中通过多个发射天线在多个连续符号周期的多个频率子信道上发送数据的装置和方法。 在数据发送装置中，S / P转换器将从数据源接收的信息符号转换为信息符号向量，编码器在至少一个符号周期内使用信息符号向量生成至少一个码元矢量，IFFT单元生成 至少与在一个符号周期中在编码器中生成的码符号向量数量的两倍的传输信号向量，多个P / S转换器各自将传输信号向量转换为传输信号流，并且保护间隔插入器插入 对从P / S转换器接收的每个发送信号流的保护间隔。

    Data transmission apparatus and method in an OFDM communication system
    60.
    发明申请
    Data transmission apparatus and method in an OFDM communication system 有权
    OFDM通信系统中的数据发送装置和方法

    公开(公告)号：US20050141414A1

    公开(公告)日：2005-06-30

    申请号：US11020532

    申请日：2004-12-23

    申请人： Kyung-Whoon Cheun ,  Joo-Yeol Yang ,  Jong-Hyeuk Lee

    发明人： Kyung-Whoon Cheun ,  Joo-Yeol Yang ,  Jong-Hyeuk Lee

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

    CPC分类号： H04L27/2628 ,  H04L1/0618 ,  H04L27/2605

    摘要： An apparatus and method for transmitting data on a plurality of frequency sub-channels for a plurality of successive symbol periods through a plurality of transmit antennas in an OFDM system. In the data transmitting apparatus, an S/P converter converts information symbols received from a data source to an information symbol vector, a coder generates at least one code symbol vector using the information symbol vector in at least one symbol period, an IFFT unit generates at least as many transmission signal vectors as twice the number of code symbol vectors generated in the coder for the one symbol period, a plurality of P/S converters each convert the transmission signal vectors to a transmission signal stream, and a guard interval inserter inserts a guard interval into each of the transmission signal streams received from the P/S converters.

    摘要翻译： 一种用于在OFDM系统中通过多个发射天线在多个连续符号周期的多个频率子信道上发送数据的装置和方法。 在数据发送装置中，S / P转换器将从数据源接收的信息符号转换为信息符号向量，编码器在至少一个符号周期内使用信息符号向量生成至少一个码元矢量，IFFT单元生成 至少与在一个符号周期中在编码器中生成的码符号向量数量的两倍的传输信号向量，多个P / S转换器各自将传输信号向量转换为传输信号流，并且保护间隔插入器插入 对从P / S转换器接收的每个发送信号流的保护间隔。