基于MATLAB的数字信号的代数插值

Electronic Measurement Technology(2008)

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Abstract
通过实验获得的测量信号往往是一系列离散的数据{xi,yi,i=1,2,3…,N,}它们反映了2个物理量之间的函数关系:y=f(x)。当要获知该函数关系中的未知测量值时,常要用到代数插值的方法。本文详细介绍了Lagrange插值,Newton插值和Hermite插值等插值方法的数学原理。通过在MATLAB操作平台上进行算法编程,对一组实验测量信号分别进行3种插值处理,最后比较这些插值方法的优劣。
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Key words
measurement signals,algebraic interpolation,arithmetic program
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