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1. 发明授权

US07453953B2 System and method for enlarging amplitude minima in a linear modulation signal 有权
标题翻译：用于放大线性调制信号中幅度最小值的系统和方法
公开(公告)号：US07453953B2
公开(公告)日：2008-11-18
申请号：US11142107
申请日：2005-06-01
申请人： Young-Seo Park , Lavanya Doblatyvenkata
发明人： Young-Seo Park , Lavanya Doblatyvenkata
IPC分类号： H04L25/09
CPC分类号： H04L27/361 , H04L27/2623
摘要： A system and a method to enlarge the minimum signal of a linear modulation signal (115) including multi-carrier modulation, such as Scalable advanced Modulation or Orthogonal Frequency Division Multiplexing, are disclosed. A minimum enlarger (120) exploits a simple amplitude limiter (220) so as not to interfere with an existing peak suppression scheme. The amplitude limiter (220) enlarges local minimum amplitude values to a predetermined minimum amplitude threshold if the local minimum amplitude values are less than the predetermined minimum amplitude threshold. While the amplitude limiter (220) adjusts the local minimum amplitude values in the linear modulation signal (115), the phase of the linear modulation signal (115) is maintained. The conditioned linear modulation signal (125) increases the efficiency of a linear power amplifier (130). The spectral change of the linear modulation signal due to the disclosed scheme is negligible because the adjusted signal power is negligible.
摘要翻译：公开了一种放大包括多载波调制（诸如可扩展高级调制或正交频分复用）的线性调制信号（115）的最小信号的系统和方法。最小放大器（120）利用简单的幅度限制器（220），以便不干扰现有的峰值抑制方案。如果局部最小振幅值小于预定最小振幅阈值，则限幅器（220）将局部最小振幅值放大到预定最小振幅阈值。当限幅器（220）调整线性调制信号（115）中的局部最小幅度值时，维持线性调制信号（115）的相位。经调节的线性调制信号（125）提高线性功率放大器（130）的效率。由于所公开的方案，线性调制信号的频谱变化是可忽略的，因为调整的信号功率是可忽略的。

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