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[Discuss-gnuradio] Fw: Re: Questions about your lte receiver


From: MANTEAU Frédéric
Subject: [Discuss-gnuradio] Fw: Re: Questions about your lte receiver
Date: Mon, 19 May 2014 17:42:41 +0200

Hi,

I'm forwarding the conversation I had a couple days ago with Johannes Demel so you can add it to the list.

Cheers,

Frederic Manteau


--------- Original Message ---------
From: address@hidden
To: "MANTEAU Frédéric" <address@hidden>
Subject: Re: Questions about your lte receiver
Date: 05/07/2014 15:51:16 (Wed)

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Hi Frederic,

gr-lte will always sync to a signal. If there is only noise it will
decode only garbage though. A good indicator for a failed sync is that
only a very few, if at all any, MIBs are decoded.

Also please post questions on the GR mailing list, so other can benefit.

happy hacking
Johannes

On 07.05.2014 15:28, MANTEAU Frédéric wrote:
> Mr Johannes Demel,
> 
> I am trying to use your lte gnuradio receiver and am currently
> facing some problems. I was wondering if you could spend some time
> to help me tackling them.
> 
> I noticed that, whatever central frequency i am setting for my
> USRP, I always get a lte signal identified and a MIB returned. 
> Thus, I was wondering which result I should expect when no signal
> is detected by my USRP.
> 
> I attached you the fft what I get from my USRP at 400MHz with a 
> bandwidth of 10MHz. I didn't expect any sync to happen but I ended
> up having a MIB with the following characteristics: N_ant = 1,
> N_rb_dl = 6, PHICH: dur = 0, res = 0,17.
> 
> Do you have any clues about the causes of this results? Do you know
> if there is any case when I have a "sync failed" result?
> 
> Thank you for your attention,
> 
> Best regards,
> 
> Frederic Manteau
> 
> 
> 
> ------------------------------------------------------------------------
>
> 
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SILICOM
___________________________________
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