Re: [Discuss-gnuradio] Noisy source block

[Martin Braun]

On 04/15/2014 04:46 AM, 猪猪猪猪猪猪头 wrote:
> hi，guys
> why the unit of amplitude in Noisy source block is volt?
> how to explain this ?
> thanks,
> BZS

Not sure what your question is. Signal amplitudes are usually in Volts,
that's just the right physical unit.

I assume you're asking because in the digital domain, there's really no
volts, and that's a good point. The unit could also just be 1. This is
something you sometimes see in (especially older) DSP textbooks.

There's a similar thing, where the mag-square of a signal is often
considered its instantaneous power (which, would assume a resistance of
1 \Ohm if you're still thinking in physical power).

So, just ignore this if it confuses you.

Martin