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    • 4. 发明授权
    • 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峰均功率比的装置和方法
    • US08300714B2
    • 2012-10-30
    • 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
    • H04K1/10
    • 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。