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Author Topic: ADSL1 vs 2  (Read 695 times)

konrado5

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Re: ADSL1 vs 2
« Reply #15 on: March 08, 2017, 07:17:50 PM »

ejs: could you account for my strange Hlog?
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Weaver

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Re: ADSL1 vs 2
« Reply #16 on: March 08, 2017, 08:30:11 PM »

Could you check my logic: you have a delta function in the fourier domain plus, plus you have a white noise source, put the two combined into a non-linear receiver, intermodulation between the two, intermodulation's difference tone, back to the fourier domain don't you see the output's fourier transform as a broadened spike?  But what exact shape is it, this looks visually vaguely like 1/(|f - f0| + c ) + b where c > 0 and height of the spike is h = 1/c. If I can add up still, that is.

Or else a similar two-sided exponential, h exp( -|f - f0| ) + b
« Last Edit: March 08, 2017, 08:38:20 PM by Weaver »
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Weaver

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Re: ADSL1 vs 2
« Reply #17 on: March 11, 2017, 04:42:12 PM »

I'm wondering how the amplitude of the difference tone might vary according to the frequency separation of the two input tones.
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