Re: Complex to 2x real - how?

On Oct 10, 2:32=A0pm, cs_post...@[EMAIL PROTECTED]
 wrote:
> On Oct 10, 1:57 pm, Randy Yates <ya...@[EMAIL PROTECTED]
> wrote:
>
> > In the described method, a constant offset is added to the frequency,
> > > so what =A0was =A0negative is now slightly positive, and what was
pos=
itive
> > > is now even more positive.
>
> > You can look at it that way. Or you can look at it in the way I have
> > proposed.
>
> No, you can't, because they are too different things.
>
> In the original proposal, the negative frequencies become the smallest
> positive frequencies, the previously positive frequencies are ****fted
> to become even more positive, the bandwidth is treated as a contiguous
> spectrum, and there is no spectral inversion.
>
> In your proposal, the positive frequencies are unchanged, but the
> negative frequencies are _inverted_ and ****fted over to lie above the
> positive frequencies. =A0This breaks the bandwidth in the middle, making
> things rather ugly.
>
> Two very different situations, one common and practical and the other
> rather weird.

You guys must be really bored at work today.

John