Description: 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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