Signal and system test report Discrete Fourier transform (DFT) and spectrum analysis I. experimental content 1. Experiment topic (1) write DFT, IDFT program, and verify its correctness (hint: use the impulse function to verify). (2) calculate the signal f (t) = e - at2sin ∏ (2 ft) of discrete Fourier transform (DFT), and its amplitude spectrum and phase spectrum and amplitude spectrum detection (frequency) and the corresponding maximum of hair f (t) are the result of DFT transform IDFT transform, and draw the graph. Parameter selection are as follows: f = 30 hz frequency, a = 2 ㏑ f (M), M = 2.5 2. Understand the physical significance of signal amplitude spectrum and phase spectrum by experiment and master the implementation method of DFT and IDFT algorithm.

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离散傅立叶变换（DFT）和频谱分析.doc

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