[Top][All Lists]

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

Re: [Discuss-gnuradio] log POWER FFT Output - Samples flipped in frequen

From: Jorge Gallo
Subject: Re: [Discuss-gnuradio] log POWER FFT Output - Samples flipped in frequency
Date: Wed, 28 Jan 2015 10:03:34 +0100


I guess it shouldn't be very difficult to change in order to get the output is from -BW/2 to BW/2 instead of [DC BW/2 + -BW/2 DC].
Should I modify my python flowgraph or my "log POWER FFT" hier block?

I just need to flip the samples and I guess there is a recommended way to do that. Can numpy.fft.fftshift() do the work?

Many thanks for you help,

On Mon, 19 Jan 2015 08:46:22 -0500, Marcus D. Leech wrote:

That's normal for FFTW-based FFTs (and a lot of others).

The output goes from:

DC to BW/2
-BW/2 to DC

Where BW is your signal bandwidth.

Marcus Leech
Principal Investigator
Shirleys Bay Radio Astronomy Consortium

reply via email to

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