CREST-FACTOR MINIMIZATION USING NONLINEAR CHEBYSHEV-APPROXIMATION METHODS
CREST-FACTOR MINIMIZATION USING NONLINEAR CHEBYSHEV-APPROXIMATION METHODS
复制标题
DOI：
10.1109/19.119778
复制
发表时间：
1991-12-01
影响因子：
5.6
通讯作者：
KOLLAR, I
中科院分区：
文献类型：
--
作者：
GUILLAUME, P;SCHOUKENS, J;KOLLAR, I
Low crest-factor of excitation and response signals is desirable in transfer function measurements, since this allows the maximization of the signal-to-noise ratios (SNR's) for given allowable amplitude ranges of the signals. The paper presents a new crest-factor minimization algorithm for periodic signals with prescribed power spectrum. The algorithm is based on approximation of the nondifferentiable Chebyshev (minimax) norm by l(p)-norms with increasing values of p, and the calculations are accelerated by using FFT's. Several signals related by linear systems can also be compressed simultaneously. The resulting crest-factors are significantly better than those provided by earlier methods. Moreover, it is shown that the peak value of a signal can be further decreased by allowing some extra energy at additional frequencies.
