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关于信号处理函数
可使用信号处理函数来分析、解释和操作模拟信号与数字信号。
以下规则适用于信号处理函数:
频率的测量单位通常为“赫兹-秒”,即,以采样频率的分数形式表示。因此频率自变量通常介于 0 和 0.5 之间。
很多信号处理函数都基于离散傅立叶变换,且使用 dft 函数。为获得最大的灵活性,输入数组的长度未被限定为 2 的方幂。当长输入矢量的长度仅为一或两个因子时,dft 程序会变慢。在长度为较大质数的特殊情况下,dft 函数只能将定义变换的指数和加在一起。在这种情况下,长度的微小变换就可能会造成计算时间发生很大变化。
信号处理参考文献
信号处理函数的实现方法和算法在以下所列书籍中进行了介绍:
Bruce L. Bowerman and Richard T. O'Connell, Time Series Forecasting, Duxbury Press (1987)
Ronald N. Bracewell, The Hartley Transform, Oxford University Press (1986)
Leon Cohen, Time-Frequency Analysis, Prentice-Hall (1995)
Rafael C. Gonzalez and Paul Wintz, Digital Image Processing, Addison-Wesley (1977)
C. W. J. Granger and Paul Newbold, Forecasting Economic Time Series, Academic Press, Inc. (1986)
Hwei P. Hsu, Schaum's Outline of Theory and Programming of Signals and Systems, McGraw-Hill, Inc.(1995)
S. Lawrence Marple, Jr., Digital Spectral Analysis with Applications, Prentice-Hall (1987)
Sophocles J. Orfanidis, Optimum Signal Processing, 2d ed, Macmillan (1988)
T. W. Parks and C. S. Burrus, Digital Filter Design, Wiley-Interscience (1987)
Alan V. Oppenheim and Ronald W. Schafer, Discrete-Time Signal Processing, Prentice Hall (1989)
Donald B. Percival and Andrew T. Walden, Spectral Analysis of Physical Applications, Cambridge University Press (1993)
William H. Press, Brian P. Flannery, Saul A. Teukolsky, and William T. Vetterling, Numerical Recipes in C, Cambridge University Press (1988)
Programs for Digital Signal Processing, IEEE Press (1979)
Lawrence R. Rabiner and Bernard Gold, Theory and Application of Digital Signal Processing, Prentice-Hall, Inc. (1975)
Mary Beth Ruskai et al., eds., Wavelets and Their Applications, Jones and Bartlett Publishers (1992)
Samuel Stearns and Ruth A. David, Signal Processing Algorithms, Prentice-Hall, Inc. (1988)
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