From: Jason White <whitewaterssoftwareinfo@gmail.com>
To: Microcontroller discussion list - Public. <piclist@mit.edu>
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Date: Sat, 16 Jan 2021 16:44:13 -0800
Subject: Re: [EE] Lossy bandwidth compression with analog circutry?
Thread-Topic: [EE] Lossy bandwidth compression with analog circutry?
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That's right, as you mentioned a fast ADC and processor is needed to cover
large bandwidths. I was curious if there were other methods.

On Sat, Jan 16, 2021 at 7:10 PM Alan Pearce <kiwiantipodean@googlemail.com>
wrote:

> Isn't this what Software Defined Radio does?
> In effect you can look at the frequency binning and select the
> bandwidth you want to monitor. It doesn't compress the frequency range,
> but does allow automatic monitoring.
>
> Have a prowl around the KiwiSDR web site http://kiwisdr.com/ and see
> what add-ons people have added to process the frequency binning (some
> of them take you to external sites). KiwiSDR only does it for 0-30MHz,
> but I believe there are others that can do it for higher frequencies
> (the main limitation is the ADC).
>
>
> On Sat, 16 Jan 2021 18:14:54 -0500
> Jason White <whitewaterssoftwareinfo@gmail.com> wrote:
>
> > Hi everyone,
> >
> > Is it possible to "compress" the bandwidth/frequency spectrum of a
> > signal using an analog circuit? (with or without loss of information)
> > For example taking 100Mhz of radio spectrum and shrinking it
> > (preferably without involvement of digital electronics) into a 1Mhz
> > span for monitoring purposes. Specifically to look at received power
> > vs frequency vs time in order to identify approximately when and at
> > what frequency transmissions occur at over a long period.
> >
> > I think the closest equivalent of this would be having a receiver scan
> > "quickly" and looking at each "slice."
> > A second might be to do some sort of "frequency binning" in the analog
> > domain.
> >
> > Are there other ways?
>
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