Trying to understand the different IQ sample ranges

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mbadders
Posts: 6
Joined: Fri Mar 20, 2015 9:29 am

Trying to understand the different IQ sample ranges

Post by mbadders »

Hi, I've been playing around with the BladeRF using bladeRF_cli, matlab and simulink, however I'm a bit confused about the samples I'm receiving.

*bladeRF-cli: This appears to be IQ samples normalised over 0 - 2048
*matlab (bladerf_dev(handle, 'RX', ...)): The return data from this appears to be complex IQ samples in between 1 to -1 on re and img planes.
*Simulink bladerf_source: This is the weird one that is confusing me, the complex values seem to be normalised around 0 and +31 on the re and img...

Does anyone know the reason for these differences? In particular for the Simulink source?

Cheers,

MB
mbadders
Posts: 6
Joined: Fri Mar 20, 2015 9:29 am

Re: Trying to understand the different IQ sample ranges

Post by mbadders »

Thanks for the script! I was doing something similar in matlab to import the .csv files from bladeRF-cli, and normalised by 2048 like you said. I'm struggling with another issue now, but that is a topic for another thread...
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