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    • 5. 发明申请
    • APPARATUS AND METHOD FOR REDUCING PEAK TO AVERAGE POWER RATIO IN AN ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING SYSTEM
    • 在正交频分复用系统中降低平均功率比的峰值的装置和方法
    • US20080298490A1
    • 2008-12-04
    • US12133108
    • 2008-06-04
    • Sung-Ryul YUNJae-Yoel KIMHak-Ju LeeHong-Sil JEONGSe-Ho MYUNG
    • Sung-Ryul YUNJae-Yoel KIMHak-Ju LeeHong-Sil JEONGSe-Ho MYUNG
    • H04L27/28
    • H04L27/2618H04L5/0048
    • A method for reducing a Peak to Average Power Ratio (PAPR) using reserved tones in a transmission apparatus of an Orthogonal Frequency Division Multiplexing (OFDM) communication system is provided. The method includes detecting a subcarrier spacing interval and the number of spaced symbols based on a predetermined pilot pattern upon signal reception, and determining positions of shifted reserved tones obtained by shifting positions of reserved tones allocated to a predetermined symbol during the number of the spaced symbols at intervals of the spacing interval; determining an impulse waveform obtained by rotating a phase of a complex value of an impulse stored in a memory, using the determined positions of frequency-domain reserved tones of each symbol; calculating a subtrahend for a PAPR of an output signal using the phase-rotated impulse waveform; and reducing a PAPR of an input signal by performing a gradient algorithm using the phase-rotated impulse waveform.
    • 提供了一种在正交频分复用(OFDM)通信系统的发送装置中使用保留音降低峰均功率比(PAPR)的方法。 该方法包括在信号接收时基于预定导频模式检测子载波间隔间隔和间隔符号数,以及确定在间隔符号的数量期间通过移位分配给预定符号的保留音调的位置而获得的移位保留音的位置 间隔间隔的间隔; 使用确定的每个符号的频域保留音调的位置来确定通过旋转存储在存储器中的脉冲的复数值的相位而获得的脉冲波形; 使用相位旋转脉冲波形计算输出信号的PAPR的减数; 以及通过使用相位旋转的脉冲波形执行梯度算法来减小输入信号的PAPR。
    • 6. 发明申请
    • APPARATUS AND METHOD FOR DETECTING SIGNAL USING MULTIVARIATE POLYNOMIAL IN MULTIPLE INPUT MULTIPLE OUTPUT COMMUNICATION SYSTEM
    • 用于在多输入多输出通信系统中使用多重多项式检测信号的装置和方法
    • US20090010350A1
    • 2009-01-08
    • US12168660
    • 2008-07-07
    • Hak-Ju LEESung-Ryul YUNJae-Yoel KIMEun-Taek LIMGeun-Ho LEESoo-Yong CHOI
    • Hak-Ju LEESung-Ryul YUNJae-Yoel KIMEun-Taek LIMGeun-Ho LEESoo-Yong CHOI
    • H04L27/28
    • H04B7/0413H04L25/0204H04L25/0224
    • A signal detection apparatus and method in a Multiple Input Multiple Output (MIMO) wireless communication system are provided. The apparatus includes a receiver for receiving training symbol vectors and a data signal vector from a transmitting end through a plurality of receive (Rx) antennas and a detector for expanding the training symbol vectors into second- or higher-order polynomials, for generating a weighting parameter vector for multivariate polynomial expansion of the data signal vector by using the polynomials expanded from the training symbol vectors and thereafter for expanding the data signal vector into a second- or higher-order multivariate polynomial using the weighting parameter vector, and for detecting Transmit (Tx) values of the data signal vector from the multivariate polynomial. Therefore, signal detection performance in a Multiple Input Multiple Output (MIMO) wireless communication system resembles that of a non-linear scheme while complexity resembles that of a linear scheme.
    • 提供了一种多输入多输出(MIMO)无线通信系统中的信号检测装置和方法。 该装置包括用于从多个接收(Rx)天线的发送端接收训练符号向量和数据信号向量的接收机,以及用于将训练符号向量扩展为二阶或更高阶多项式的检测器,用于生成加权 参数矢量,用于通过使用从训练符号向量扩展的多项式来进行数据信号向量的多元多项式展开,然后使用加权参数向量将数据信号向量扩展为二阶或更高阶多元多项式,并且用于检测发送( Tx)数值信号向量的多值多项式。 因此,多输入多输出(MIMO)无线通信系统中的信号检测性能类似于非线性方案的信号检测性能,而复杂度类似于线性方案。