Spectral Analysis Methods for Periodic and Non-Periodic Signals
Calculating the spectrum of a signal is important for many applications. To be able to automatically calculate the spectrum and also treat signals of arbitrary shape, there is a special interest in methods for numerical determination of the Fourier transform. These methods are typically implemented on digital computers, which makes it necessary to sample and store the signal before it is transformed. This brings along special ramifications that are discussed in later sections of this chapter. As the data sequences can be quite long, one is also especially interested in computationally efficient implementations of the Fourier transform on digital computers.
KeywordsFast Fourier Transform Discrete Fourier Transform Window Function Chirp Signal Short Time Fourier Transform
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