[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Discuss-gnuradio] Retrieving audio after FFT and IFFT

From: Marcus D. Leech
Subject: Re: [Discuss-gnuradio] Retrieving audio after FFT and IFFT
Date: Thu, 17 Oct 2013 10:59:44 -0400
User-agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv: Gecko/20111108 Fedora/3.1.16-1.fc14 Thunderbird/3.1.16

On 10/17/2013 10:52 AM, Martin Braun (CEL) wrote:
On Thu, Oct 17, 2013 at 04:44:00PM +0200, Sylvain Munaut wrote:
I'm not convinced by the way you handle the complex part of the FFT result ...

You can't just drop it, it's needed for the reconstruction ...
You're right, but in this case the input was already real and the
"channel" doesn't modify the phase. So it's OK--the 'correct' thing
would be to do a real FFT.


Works fine. If you want do to an ifft(fft(x)), you can't have windows
(feel free to do OS jokes here).


Add "joke" windows to filter blocks:

   o Vista
   o XP
   o 95
   o 3.11
   o Blue-window-of-death


Marcus Leech
Principal Investigator
Shirleys Bay Radio Astronomy Consortium

reply via email to

[Prev in Thread] Current Thread [Next in Thread]