Re: About umts

[Johannes Demel]

Hi Oliver,

unfortunately, I don't know of any GNU Radio UMTS implementation. If 
others do, they will point you to it.

Besides, I'd like to point out a few caveats. UMTS is not a simple 
single carrier system. You can't just use a Costas Loop to sync to your 
constellation. You first need to synchronize, deal with CDMA and 
probably equalize before you can observe a constellation.

My understanding is that UMTS systems will be shut down soon. At least 
in Germany all carriers have announced to shut down their 3G systems in 
'21. It might be totally different in other countries. 2G/GSM is still 
available in Germany, and will be after the UMTS shutdown.
Where do you want to receive UMTS signals?

Cheers
Johannes

On 26.03.21 11:04, Oliver pamt wrote:
> Hello, new user here.
> I'm looking for a way to receive umts (3g) with usrp and gnuradio.
> first, I would like to observe the constellation qpsk.
> Is there a tool already developed that could do the trick?
>
> Thank you
>
> Oliver