Spectral analysis MATLAB experiment
2016-08-23
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Application background
signal is infinitely long, and in the process of signal processing can only use a limited long signal, so the signal is needed to "cut off". In signal processing, the "cut off" is viewed as a signal of a finite length, or from the point of view of the analysis is the infinite length x (T) multiplied by the finite length w (T).& nbsp; & nbsp; if x (T) is a bandwidth limited signals, and w (T) is unlimited bandwidth function, truncated signal also must be unlimited bandwidth signal, resulting in the so-called spectral leakage.Key Technology
Using MATLAB programming to draw the shape of various window functions 2, using MATLAB programming to draw a variety of window function of the amplitude response 3, the amplitude frequency response of the rectangular window, the window length are: N=10, N=20, N=50, N=100& nbsp; 4, known periodic signal x (T) =0.75+3.4cos2 PI ft+2.7cos4 PI ft+1.5sin3.5 PI ft+2.5sic
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