FFT for 1GHz signal with 1Hz Spectral density
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Suppose that I have a 1GHz signal sample at 100GHz.If I wish to find spectrum of this signal (I need 1Hz resolution), I need to have approximately 2^36 FFT bins.Now the question is , how can one simulate FFT with such huge array size on a standard notebook with standard configuration ?
I don't mind waiting for few hours (I tried before) and I had array size error (says it exceeded 7.5 gb space).
Also, do you have any suggestion if I need spectral accuracy at low frequency ? Thanks.
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Walter Roberson
on 15 Sep 2015
You indicate the frequency of your signal of interest and you indicate the sample rate, but we need to have an idea of how large your original array is.
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