[srsran-users] SDR for 5G NSA

[Liam Fruzyna]

Ralph, I believe you are referring to the B210's sample rate of 61.44 MS/s,
but its advertised bandwidth is 56 MHz.

https://www.ettus.com/wp-content/uploads/2019/01/b200-b210_spec_sheet.pdf

Liam

On Wed, Dec 8, 2021 at 9:09 AM Ralph A. Schmid, dk5ras <ralph at schmid.xxx>
wrote:

> It should be good for 61.44 MHz...
>
>
>
> *From:* srsran-users [mailto:srsran-users-bounces at lists.srsran.com] *On
> Behalf Of *Liam Fruzyna
> *Sent:* Monday, December 6, 2021 4:29 PM
> *To:* Andre Puschmann <andre.puschmann at srs.io>
> *Cc:* srsran-users at lists.srsran.com
> *Subject:* Re: [srsran-users] SDR for 5G NSA
>
>
>
> Thanks for the explanation Andre. I was able to borrow a B210 for testing
> and was also unable to find a suitable band combination for our UEs and the
> SDR. Unfortunately it seems the B210's 56 MHz of bandwidth is just a few
> MHz too thin for many of the interesting bands.
>
>
>
> Liam
>
>
>
> On Thu, Dec 2, 2021 at 3:18 AM Andre Puschmann <andre.puschmann at srs.io>
> wrote:
>
> Liam,
>
> for 5G NSA to work with srsRAN, both the UE and the eNB, require a SDR
> with two independable tunable RF chains. See [1] for details on it.
>
> This requirement stems from the fact that band combinations for NSA for
> commercial handsets are very restrictive. We couldn't find a combo that
> fits in the analog bandwidth of a dual-channel SDR with a combined LO
> for both chains, like the B210. If you can, it might be possible to use
> that for NSA with COTS phones.
>
> Thanks
> Andre
>
>
> [1]
>
> https://urldefense.proofpoint.com/v2/url?u=https-3A__docs.srsran.com_en_latest_app-5Fnotes_source_5g-5Fnsa-5Fcots_source_index.html&d=DwIDaQ&c=q3cDpHe1hF8lXU5EFjNM_C93KOmcBXCBnhee2v6PYlc&r=AtSro4DufTwmBgpOjhWumn37K8fS9EEKqss-YAmIHNwGm_z8wdEhnuMVbP9ohTL0&m=eYNwZMbbnnVz8fPBycssdQY6htFlrXhDEiWux7nivimH_duDXjIrWuXpy2vi-1PT&s=oewBB79uebwJCQke8lKANLOC7EsQsCs7dsTOK6IQEYg&e=
>
>
> On 1/12/21 18:30, Liam Fruzyna wrote:
> > Greetings,
> >
> > I have been successfully running the eNodeB with a USRP B200 mini, but
> > am looking to try 5G NSA which will require a more capable SDR. The wiki
> > recommends the X300 series. Has anybody tried it with a B210 or other
> > lower tier USRP?
> >
> > Thanks,
> > Liam
> >
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> --
> Andre Puschmann
>
> Software Radio Systems (SRS)
>
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