摘要
针对周期信号分析中的频谱泄漏问题 ,本文就目前国际上的研究状况和趋势进行了简单地介绍 ,提出了重新定位取样序列的同步化方法 ,推导出了同步化取样序列坐标的定位公式 .比较详细地讨论了线性、二阶和四阶同步化算法 ,并对它们的理论截断误差进行了分析 .通过对不同谐波形式的仿真信号的同步化运算和误差分析 ,获得了线性同步化算法的理论和实际误差特性 ,以及二阶抛物同步化算法和四阶前插同步化算法的实际误差特性 .误差分析的结果表明 ,这种非同步取样数据的同步化算法 ,具有良好的同步效果 ,不仅可应用于稳态周期信号 ,也适用于周期性非稳态过程信号的测量和分析 .
The latest progress and the research direction on reducting spectrum leakage in periodic signal measurement and analysis are simply introduced firstly, and a synchronization method of re-locating the second sampling coordinate is presented. Then, a formula for locating the second sampling coordinate, and a synchronization algorithm (1st order linear, 2nd order parabolic, and 4th order interpolation etc.), and their theoretical truncation errors are also discussed. By computer simulation lastly, through the synchronization calculation and the error analysis of various harmonic signals, the theoretical and practical error characteristics of the 2nd order parabolic and 4th order interpolation synchronization algorithm are obtained. Simulation results show that the algorithm could be used not only in steady state signal analysis, but also in periodical non-steady state process signal analysis.
出处
《电子学报》
EI
CAS
CSCD
北大核心
2001年第7期950-953,共4页
Acta Electronica Sinica
关键词
非同步取样
同步化算法
周期域分析
同步化
信号分析
Algorithms
Computer simulation
Data processing
Error analysis
Harmonic analysis
Interpolation
Sampling
Synchronization
