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    • 92. 发明授权
    • Apparatus and method for minimizing PAPR in an OFDM communication system
    • 用于使OFDM通信系统中的PAPR最小化的装置和方法
    • US07496028B2
    • 2009-02-24
    • US10746572
    • 2003-12-24
    • Ki-Ho JungHeung-Gyooun RyuSung-Ryul Yun
    • Ki-Ho JungHeung-Gyooun RyuSung-Ryul Yun
    • H04J11/00
    • H04L27/2618
    • A signal transmission apparatus for minimizing a PAPR in an OFDM communication system. A subband divider divides L information data subcarrier signals into M subband signals. An additional information inserter inserts into the L information data subcarrier signals P additional information subcarrier signals. A dummy sequence inserter inserts the dummy sequence into a subband in the position. An IFFT block initially generates first and second OFDM symbol signals using M dummy sequence-free subband signals and M dummy sequence-inserted subband signals. A controller determines a sign bit value and an address bit value of the additional information when a PAPR value of the first OFDM symbol signal exceeds a predetermined PAPR threshold, and then performs a control operation of inserting the dummy sequence into a subband in a position corresponding to the address bit value so that the second OFDM symbol signal is transmitted over a downlink.
    • 一种用于使OFDM通信系统中的PAPR最小化的信号发送装置。 子带分配器将L个信息数据副载波信号分成M个子带信号。 附加信息插入器将L个信息数据副载波信号P附加信息副载波信号插入。 虚拟序列插入器将虚拟序列插入该位置的子带中。 IFFT块最初使用M个无无序序列的子带信号和M个虚拟序列插入子带信号来产生第一和第二OFDM符号信号。 当第一OFDM符号信号的PAPR值超过预定的PAPR阈值时,控制器确定附加信息的符号位值和地址位值,然后执行将虚拟序列插入到相应位置的子带中的控制操作 到地址位值,使得第二OFDM符号信号通过下行链路传输。
    • 99. 发明授权
    • Apparatus and method for transmitting and receiving side information of a partial transmit sequence in an OFDM communication system
    • 在OFDM通信系统中发送和接收部分发送序列的侧信息的装置和方法
    • US07376074B2
    • 2008-05-20
    • US10423560
    • 2003-04-25
    • Ki-Ho JungHeung-Gyooun RyuSung-Ryul Yun
    • Ki-Ho JungHeung-Gyooun RyuSung-Ryul Yun
    • H04J11/00
    • H04L27/2621
    • An OFDM (Orthogonal Frequency Division Multiplexing) communication system that multiplexes data with a plurality of orthogonal sub-carrier frequencies, which includes a transmitter for converting a serial data stream into parallel data, and segmenting the parallel data into a plurality of blocks having a plurality of data blocks; inserting reference data having information representing a phase value and a position into which the reference symbol is inserted, into each of the segmented blocks; IFFT (Inverse Fast Fourier Transform)-transforming the respective blocks into time-based signals where sub-carrier frequencies are separately assigned to the data blocks; and determining phase factors of the IFFT-transformed time-based signals to reduce a peak-to-average power ratio (PAPR) where non-linear distortion occurs due to coincidence of phases of the data blocks IFFT-transformed with the sub-carrier frequencies, and phase-rotating the IFFT-transformed signals according to the determined phase factors before transmission.
    • 一种OFDM(正交频分复用)通信系统,其将数据与多个正交副载波频率进行复用,所述OFDM系统包括用于将串行数据流转换为并行数据的发射机,并将该并行数据分割为具有多个 的数据块; 将具有表示相关值的信息和参考符号插入的位置的参考数据插入到每个分段块中; IFFT(逆快速傅立叶变换) - 将各个块转换为基于时间的信号,其中副载波频率被分配给数据块; 以及确定IFFT变换的基于时间的信号的相位因子,以减少由于与子载波频率IFFT变换的数据块的相位的一致而发生非线性失真的峰均功率比(PAPR) 并且根据所确定的相位因子在传输之前相位旋转IFFT变换的信号。
    • 100. 发明申请
    • APPARATUS AND METHOD FOR TRANSMITTING AND RECEIVING SIDE INFORMATION OF A PARTIAL TRANSMIT SEQUENCE IN AN OFDM COMMUNICATION SYSTEM
    • 在OFDM通信系统中发送和接收部分发送序列的侧信息的装置和方法
    • US20080049602A1
    • 2008-02-28
    • US11860344
    • 2007-09-24
    • Ki-Ho JungHeung-Gyooun RyuSung-Ryul Yun
    • Ki-Ho JungHeung-Gyooun RyuSung-Ryul Yun
    • H04J11/00
    • H04L27/2621
    • An Orthogonal Frequency Division Multiplexing (OFDM) communication system that multiplexes data with a plurality of orthogonal sub-carrier frequencies, which includes a transmitter for converting a serial data stream into parallel data, and segmenting the parallel data into a plurality of blocks having a plurality of data blocks; inserting reference data having information representing a phase value and a position into which the reference symbol is inserted, into each of the segmented blocks; Inverse Fast Fourier Transform (IFFT)-transforming the respective blocks into time-based signals where sub-carrier frequencies are separately assigned to the data blocks; and determining phase factors of the IFFT-transformed time-based signals to reduce a Peak-to-Average Power Ratio (PAPR) where non-linear distortion occurs due to coincidence of phases of the data blocks IFFT-transformed with the sub-carrier frequencies, and phase-rotating the IFFT-transformed signals according to the determined phase factors before transmission.
    • 一种正交频分复用(OFDM)通信系统,其将数据与多个正交副载波频率进行复用,所述正交副载波频率包括用于将串行数据流转换为并行数据的发射机,并将该并行数据分割为多个具有多个 的数据块; 将具有表示相关值的信息和参考符号插入的位置的参考数据插入到每个分段块中; 逆快速傅立叶变换(IFFT) - 将各个块转换成基于时间的信号,其中子载波频率被分配给数据块; 并且确定IFFT变换的基于时间的IF信号的相位因子,以减少由于与子载波频率IFFT变换的数据块的相位的一致而发生非线性失真的峰值平均功率比(PAPR) 并且根据所确定的相位因子在传输之前相位旋转IFFT变换的信号。