centro-

Assuming the equiprobable centro-symmetric constellation for modulation, SFCM was proved to be biased due not only to the noise, but also to the irreducible inter-carrier interference aroused by the Doppler spread.

假设采用等概率中心对称星座调制导频符号，我们证明不仅加性白高斯噪声会给估计带来干扰，由多普勒扩展引起的载波间干扰也会引起偏差。

Two acceleration time-history curves Tianjin wave and EL-Centro wave are chosen to analyze seismic time-history response by using uniform excitation and traveling-wave excitation.

选用天津波和EL-Centro波两种加速度时程曲线，采用一致激励和行波激励分别进行地震时程响应分析。

Based on the seismic response analysis of response spectra, time history analysis method, select the El-Centro wave seismic response analysis carried out.

基于地震反应反应谱分析、时程分析法，选取El-Centro波进行了地震反应分析。