How to calculate Bandwidth of Noise of particular length?

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Syed Adeel
Syed Adeel 2020-6-5
编辑： Chaitanya Mallela 2020-7-13
If i generate a noise of particular points N, is its bandwidth dependent on lenght of vector?
N = 100;
time = 1: 1: N;
noise = randn (size (time))

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Chaitanya Mallela
Chaitanya Mallela 2020-7-13
编辑：Chaitanya Mallela 2020-7-13
randn function has default mean equals zero and variance equals one irrespective of length of the input vector to which noise has be added. For a zero mean RVs Noise Power is same as variance and Noise Power can be computed as the area enclosed by the PSD in the frequency domain (PSD * Bandwidth). Bandwidth is independent of length of the vector unless it is passed through external filters with frequency varying PSD.

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