I just realized that float to bits is also acceptable, as long as the samples
don't lose precision.
I didn't tacked this by scaling the samples then converting to int because I
don't know what is the range of values for the outputs of the FFT and IFFT
blocks.
From: gui--rit...@hotmail.com
To: discuss-gnuradio@gnu.org
Subject: Complex to bits
Date: Sat, 19 Oct 2013 10:11:33 -0300
Hi everyone.
Thanks for all the replies on my previous thread. I did some tests and found
out that the FFT and IFFT do not add noise to my audio signal. It works
perfectly! The noise is coming from another part of my flowgraph.
Before I introduced the FFT and IFFT, I was working with an audio signal that
was scaled and converted to int, so it could be unpacked into bits; those bits
were processed and retrieved, packed, converted to float, descaled and turned
back to audio. There was no noise then. Adding the FFT and IFFT made me use the
complex type before the unpacking, so what I was using to make it possible to
unpack the signal into bits no longer worked properly.
I tried changing the scale constant, converting from complex to IShort and
unpacking that, but neither worked.
So, my question is: how do I unpack a complex signal into bits, and then pack
it back? Considering I'm working on a audio signal that shouldn't get noise
added to it.
Thanks in advance.
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