Hi Don,

For certain methods of accomplishing reconstruction, you are right, but I
don't think that is true in general. You can take any signal bandlimited to
delta_f, sample it at 2*delta_f, and reconstruct it from the samples. It
doesn't matter what the center frequency is, or whether it is periodic, as
long as it is bandlimited. So, for example, you could have a signal which
filled the entire band from 0.9 to 1.1 MHz, sample it at only 0.4
Megasamples per sec, and reconstruct it from that, as long as you had the
additional piece of info that its center freq was 1 MHz.

Sean

At 07:41 PM 2/16/01 -0800, you wrote:
>Hi,
>
>The signal must necessarily be periodic for this to work....
>Lets not forget that restriction!
>
>Cheers,
>Don
>
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