# Fw: Re: Questions about your lte receiver

**URL:** <https://www.ruby-forum.com/t/fw-re-questions-about-your-lte-receiver/241216>\
**Category:** GNU Radio\
**Created:** [May 19, 2014, 6:05pm UTC](https://www.ruby-forum.com/t/fw-re-questions-about-your-lte-receiver/241216 "2014-05-19T18:05:48Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![musicdenotation](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/ea666f/32.png) [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\
**Post date:** [May 19, 2014, 6:05pm UTC](https://www.ruby-forum.com/t/fw-re-questions-about-your-lte-receiver/241216/1 "2014-05-19T18:05:48Z")

</div>

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: removed\_email\_address@domain.invalid: “MANTEAU  
Frédéric” \<removed\_email\_address@domain.invalid\>Subject: Re: Questions about your  
lte receiverDate: 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 D., \> \> 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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joints peuvent contenir des informations confidentielles. Ces  
informations sont à usage exclusif du destinataire. La réception de ce  
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confidentiel et le secret professionnel. Ainsi, nous vous demandons de  
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