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Re: [Discuss-gnuradio] Question on FFT (Josh Blum)

From: Sam mite
Subject: Re: [Discuss-gnuradio] Question on FFT (Josh Blum)
Date: Sat, 18 Aug 2012 13:47:08 -0700

Hi Josh!

Thanks for reply. I change type from complex float to float but still I found no negative frequency. I attached the GRC image. What should be the type of blocks to get both frequencies ?


Best Regards,


On 08/17/2012 11:45 AM, Sam mite wrote:
> Hi All,
> I wanted to work on FFT using gnuradio. I have a question. Why there is
> only one frequency shown in plot ? why negative frequency is not being
> displayed ? I have attached picture of GRC implementation and FFT plot as
> well.

So, the blue color means complex floats. The signal source is not
producing sin(t), its producing e^jwt


> Best Regards,
> Sam
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