Strange behaviour

GNU Radio
1

Hi,

I’m seeing some strange behaviour in Gnuradio that i cannot explain.
Subtracting the same value from each other should return zero, If I’m
not
mistaken. And why is there a dip in the center of my X310 stream? No
signal
is connected to the USRP.

What am I missing?

Kind Regards
Simon

2

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Hi Simon,

I recommend using QT GUIs. WX GUI will be removed eventually.

‘stream to streams’ does not duplicate samples. In your case the first
sample goes to output 0 and the second sample goes to output 1.

For AWGN you should observe another noise for in your FFT plot.

Your received signal is not a perfect AWGN signal. e.g. your dip is
probably some 1/f noise caused by some analog part in your USRP. Have
a look at the unprocessed samples form the USRP source.

happy hacking
Johannes

On 04.08.2015 15:07, Simon Olvhammar wrote:

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