>
> Almost right. If I bandpass filter (some at least) and if I do 1
> bit sampling at 100 MHz and the signal of interest is 20 kHz wide
> and I filter and downsample and filter and downsample, etc. in a
> cascaded fashion as in cascaded-integrator-comb or half-band
> filtering, then I can arrange a very large dynamic range.
> Not the full 70 dB theoretical from downsampling and filtering
> 100 MHz to 20 kHz, but the principle is clear.
>
> Bob
>
Bob,
yes, right, but which DSP core of today is able to filter (before
decimation) at 100 MHz sampling rate ? May be my knowledge of what
hardware is available is a bit obsolete, but, AFAIK, that is beyond
the capabilities of today's DSP hardware.
And in any case 70 dB (70 or 74 ?) of dynamic range aren't enough to
classify an Rx as not even near to the state of the art...
73 Alberto I2PHD
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