Re: Complex to 2x real - how?

dotter <dotter@[EMAIL PROTECTED]
> writes:
> [...]
> Given the architecture of the device and various FPGA implmentations,
> interpolation seems unlikely and more likely to be some cleverness
> though I wonder if this is in the implementation space rather than
> signal processing.

If you simply take the real component and stuff zeros in every
other sample to upsample to 2*Fs, you've got what's advertised,
although without the "inversion". That is, you'll have a real signal
that has the original content from 0 to Fs / 2 preserved in 0 to Fs / 2
of the new signal, and the original content from -Fs / 2 to 0 preserved
in Fs / 2 to Fs. Since the new sample rate is 2 * Fs, Fs is the highest
frequency at the output rate. 
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