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    • 3. 发明授权
    • System and method for crest factor reduction
    • 波峰因数降低的系统和方法
    • US07738573B2
    • 2010-06-15
    • US11246027
    • 2005-10-07
    • Khiem V. CaiSamuel Davis Kent, IIIDon C. Devendorf
    • Khiem V. CaiSamuel Davis Kent, IIIDon C. Devendorf
    • H04K1/10
    • H04L27/2624
    • A crest reduction system and method. The inventive system includes a first circuit for suppressing peak amplitudes of an input signal and providing a peak amplitude suppressed signal in response thereto and a second circuit coupled to the first circuit for rejecting intermodulation distortion in the amplitude suppressed signal. In the illustrative implementation, the first circuit is a peak amplitude suppressor having circuitry for computing an amplitude of the input signal and for computing a gain factor for the input signal in response thereto. In the best mode, the gain factor is obtained from a lookup table. The peak amplitude suppressor further includes a multiplier for applying the gain factor to the input signal. In the illustrative embodiment, the second circuit includes a plurality of bandpass filters and a summer for combining the outputs thereof.
    • 一种降幅系统和方法。 本发明的系统包括:第一电路,用于抑制输入信号的峰值振幅并响应于此提供峰值振幅抑制信号;以及第二电路,耦合到第一电路,用于抑制振幅抑制信号中的互调失真。 在说明性实现中,第一电路是峰值幅度抑制​​器,其具有用于计算输入信号的幅度的电路,并且响应于此计算输入信号的增益因子。 在最佳模式下,增益因子从查找表获得。 峰值幅度抑制​​器还包括用于将增益因子应用于输入信号的乘法器。 在说明性实施例中,第二电路包括多个带通滤波器和用于组合其输出的加法器。