No, I did not mean that.
Ok, this might be a problem: "Scaling", for me, means "multiplying with a scalar
value".
My suggestion therefore was that you just insert a multiplier before the IFFT.
Maybe we're talking about a different "scaling"?
Greetings,
Marcus
On 10/22/2014 06:46 AM, zealdeal
Also I tried manually scaling down the output array in fft_vcc_fftw:work
function. That has no effect no IFFT output!
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Did you mean something like:
self.connect(self._pkt_input, 0), self.scale, (self.preambles,0)) ?
That's not working as it's giving itemsize mismatch error!
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You should probably look at the new OFDM codes. If you see the
ofdm_tx.grc example, I think there's already a scaler in there.
M
On 10/16/2014 01:35 PM, zealdeal wrote:
> Hi All,
>
> I need to scale down the OFDM transmission signal in time domain, after IFFT
> is done, so that, all the values a
Hi you!
>Any pointer on where should I make the change?
Yes. Do it before preambling!
The inverse dft is a linear operation; it doesn't really matter whether
you scale before or after. Note though that the IFFT as we use it adds a
sqrt(length_of_fft) factor, so account for that by dividing your sca
Hi All,
I need to scale down the OFDM transmission signal in time domain, after IFFT
is done, so that, all the values are within the range -1 to 1. But, I cant
simply add one more "scaling" block after cp_adder in
self.connect(self.preambles, self.ifft, self.cp_adder, self.scale, self)
(file: of
