Send USRP-users mailing list submissions to
[email protected]
To subscribe or unsubscribe via the World Wide Web, visit
http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
or, via email, send a message with subject or body 'help' to
[email protected]
You can reach the person managing the list at
[email protected]
When replying, please edit your Subject line so it is more specific
than "Re: Contents of USRP-users digest..."
Today's Topics:
1. Example on how to use UHD_STREAM_MODE_NUM_SAMPS_AND_MORE mode
(Felipe Augusto Pereira de Figueiredo)
2. Re: Example on how to use UHD_STREAM_MODE_NUM_SAMPS_AND_MORE
mode (Marcus M?ller)
3. Re: system requirements for 6X6 MIMO (Gilad Beeri (ApolloShield))
4. Re: system requirements for 6X6 MIMO (Nikita Airee)
5. Re: system requirements for 6X6 MIMO (Julian Arnold)
6. Re: system requirements for 6X6 MIMO (Gilad Beeri (ApolloShield))
----------------------------------------------------------------------
Message: 1
Date: Tue, 6 Jun 2017 18:53:24 +0200
From: Felipe Augusto Pereira de Figueiredo <[email protected]>
To: "[email protected]" <[email protected]>
Subject: [USRP-users] Example on how to use
UHD_STREAM_MODE_NUM_SAMPS_AND_MORE mode
Message-ID:
<CA+abmwL=eujoucefkniq5evs+x9rmr8rdktw3d1opdqq1dy...@mail.gmail.com>
Content-Type: text/plain; charset="UTF-8"
Dear Folks,
I'm writing an UHD application to receive and demodulate some signals
and I'd like to use the UHD_STREAM_MODE_NUM_SAMPS_AND_MORE mode,
however, I couldn't find any example on how to use this mode to read
samples.
I've googled "UHD_STREAM_MODE_NUM_SAMPS_AND_MORE" and only the headers
where it is defined on the UHD project came back.
Could someone give me an example on how to use that mode, please?
Kind Regards,
Felipe Augusto
------------------------------
Message: 2
Date: Tue, 6 Jun 2017 19:35:21 +0200
From: Marcus M?ller <[email protected]>
To: [email protected]
Subject: Re: [USRP-users] Example on how to use
UHD_STREAM_MODE_NUM_SAMPS_AND_MORE mode
Message-ID: <[email protected]>
Content-Type: text/plain; charset=windows-1252
Hi Felipe,
why exactly do you want to use that mode?
Best regards,
Marcus
On 06.06.2017 18:53, Felipe Augusto Pereira de Figueiredo via USRP-users
wrote:
> Dear Folks,
>
> I'm writing an UHD application to receive and demodulate some signals
> and I'd like to use the UHD_STREAM_MODE_NUM_SAMPS_AND_MORE mode,
> however, I couldn't find any example on how to use this mode to read
> samples.
>
> I've googled "UHD_STREAM_MODE_NUM_SAMPS_AND_MORE" and only the headers
> where it is defined on the UHD project came back.
>
> Could someone give me an example on how to use that mode, please?
>
> Kind Regards,
>
> Felipe Augusto
>
> _______________________________________________
> USRP-users mailing list
> [email protected]
> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
------------------------------
Message: 3
Date: Wed, 07 Jun 2017 05:03:03 +0000
From: "Gilad Beeri (ApolloShield)" <[email protected]>
To: Nikita Airee <[email protected]>, "[email protected]"
<[email protected]>
Subject: Re: [USRP-users] system requirements for 6X6 MIMO
Message-ID:
<CAF4UVpC26NoCL1=fhdsg_wpqyvgttpk2s7acxhjtrwcf3dj...@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
Hi Nikita,
I believe that the sample rates you want to use are a critical factor for
the system spec, in addition to the transmitted signal characteristics
(e.g., modulating an OFDM signal will require more CPU resources than
transmitting noise).
How do you connect the X310 devices to your laptop?
On Tue, Jun 6, 2017 at 11:42 AM Nikita Airee via USRP-users <
[email protected]> wrote:
> Hello everyone,
>
> I would like to create a 6x6 MIMO setup with my x310s and n210s. The
> transmitters have to be synchronized and hence have to be powered by the
> same system but the receivers can driven separately by distinct hosts. To
> use multiusrp configuration, driven by a single host, I need a system that
> would be able to service these 6 x310s at the same time.
> My current system is a Lenovo Thinkpad w530 with processor: Intel? Core?
> i5-3320M CPU @ 2.60GHz ? 4. This one I believe would fall short. It is
> anyway underpowered at 20M sampling rate.
> So what type of a system should I have for smooth operation of my setup?
> Any and all suggestions are welcome.
>
> Bests,
> Nikita Airee
>
>
> _______________________________________________
> USRP-users mailing list
> [email protected]
> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://lists.ettus.com/pipermail/usrp-users_lists.ettus.com/attachments/20170607/0dfa0213/attachment-0001.html>
------------------------------
Message: 4
Date: Wed, 7 Jun 2017 12:42:38 +0530
From: Nikita Airee <[email protected]>
To: "Gilad Beeri (ApolloShield)" <[email protected]>
Cc: "[email protected]" <[email protected]>
Subject: Re: [USRP-users] system requirements for 6X6 MIMO
Message-ID:
<CAOT=ST=F2MLm_FFXqozOnq_mEtA=xD8hOgE=H3zo94JSe-Qg=g...@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
Hi Gilad, thank you for your response! The operation being performed would
definitely not just be noise transmission but full fledged OFDM modulation.
I'm working with gr-ieee802-11 specifically.
I connect the x310 device using 1GigE during normal operations. My system
works without many glitches for at least two USRPs connected at the same
time. Unfortunately, I don't have the necessary equipment to test if it
could service more than 2 as well. But I also have an option of using PCIe.
On Wed, Jun 7, 2017 at 10:33 AM, Gilad Beeri (ApolloShield) <
[email protected]> wrote:
> Hi Nikita,
> I believe that the sample rates you want to use are a critical factor for
> the system spec, in addition to the transmitted signal characteristics
> (e.g., modulating an OFDM signal will require more CPU resources than
> transmitting noise).
>
> How do you connect the X310 devices to your laptop?
>
>
> On Tue, Jun 6, 2017 at 11:42 AM Nikita Airee via USRP-users <
> [email protected]> wrote:
>
>> Hello everyone,
>>
>> I would like to create a 6x6 MIMO setup with my x310s and n210s. The
>> transmitters have to be synchronized and hence have to be powered by the
>> same system but the receivers can driven separately by distinct hosts. To
>> use multiusrp configuration, driven by a single host, I need a system that
>> would be able to service these 6 x310s at the same time.
>> My current system is a Lenovo Thinkpad w530 with processor: Intel? Core?
>> i5-3320M CPU @ 2.60GHz ? 4. This one I believe would fall short. It is
>> anyway underpowered at 20M sampling rate.
>> So what type of a system should I have for smooth operation of my setup?
>> Any and all suggestions are welcome.
>>
>> Bests,
>> Nikita Airee
>>
>>
>> _______________________________________________
>> USRP-users mailing list
>> [email protected]
>> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
>>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://lists.ettus.com/pipermail/usrp-users_lists.ettus.com/attachments/20170607/f6ab9870/attachment-0001.html>
------------------------------
Message: 5
Date: Wed, 7 Jun 2017 09:42:11 +0200
From: Julian Arnold <[email protected]>
To: Nikita Airee <[email protected]>
Cc: "[email protected]" <[email protected]>
Subject: Re: [USRP-users] system requirements for 6X6 MIMO
Message-ID: <[email protected]>
Content-Type: text/plain; charset=utf-8
Hey,
> I need a system that would be able to service these 6 x310s at the
> same time
if you want 6 TX streams wouldn't 3 x310s already do the job?
Maybe you could consider using RFNoC to do some of the signal processing
required for OFDM and thereby reduce the processing load on your host by
a lot.
For an example using PCIe take a look at [1].
[1] http://ieeexplore.ieee.org/document/7063446/#full-text-section
Cheers,
Julian
On 06/07/2017 09:12 AM, Nikita Airee via USRP-users wrote:
> Hi Gilad, thank you for your response! The operation being performed
> would definitely not just be noise transmission but full fledged OFDM
> modulation. I'm working with gr-ieee802-11 specifically.
>
> I connect the x310 device using 1GigE during normal operations. My
> system works without many glitches for at least two USRPs connected at
> the same time. Unfortunately, I don't have the necessary equipment to
> test if it could service more than 2 as well. But I also have an
> option of using PCIe.
>
> On Wed, Jun 7, 2017 at 10:33 AM, Gilad Beeri (ApolloShield)
> <[email protected] <mailto:[email protected]>> wrote:
>
> Hi Nikita,
> I believe that the sample rates you want to use are a critical
> factor for the system spec, in addition to the transmitted signal
> characteristics (e.g., modulating an OFDM signal will require more
> CPU resources than transmitting noise).
>
> How do you connect the X310 devices to your laptop?
>
>
> On Tue, Jun 6, 2017 at 11:42 AM Nikita Airee via USRP-users
> <[email protected] <mailto:[email protected]>>
> wrote:
>
> Hello everyone,
>
> I would like to create a 6x6 MIMO setup with my x310s and
> n210s. The transmitters have to be synchronized and hence have
> to be powered by the same system but the receivers can driven
> separately by distinct hosts. To use multiusrp configuration,
> driven by a single host, I need a system that would be able to
> service these 6 x310s at the same time.
> My current system is a Lenovo Thinkpad w530 with processor:
> Intel? Core? i5-3320M CPU @ 2.60GHz ? 4. This one I believe
> would fall short. It is anyway underpowered at 20M sampling rate.
> So what type of a system should I have for smooth operation of
> my setup? Any and all suggestions are welcome.
>
> Bests,
> Nikita Airee
>
>
> _______________________________________________
> USRP-users mailing list
> [email protected] <mailto:[email protected]>
> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
> <http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com>
>
>
>
>
> _______________________________________________
> USRP-users mailing list
> [email protected]
> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
--
Julian Arnold, M.Sc.
Institute for Networked Systems
RWTH Aachen University
Kackertstrasse 9
52072 Aachen
Germany
------------------------------
Message: 6
Date: Wed, 07 Jun 2017 08:58:27 +0000
From: "Gilad Beeri (ApolloShield)" <[email protected]>
To: Julian Arnold <[email protected]>, Nikita Airee
<[email protected]>
Cc: "[email protected]" <[email protected]>
Subject: Re: [USRP-users] system requirements for 6X6 MIMO
Message-ID:
<caf4uvpctxtccqy7trmeobmh6rprcbyfnwy5e-pbdhho3-9u...@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
I think Julian is right - you could use 3 X310 with 2 daughterboards each
to get 6 Tx channels.
You use 1 GigE, so if you use sc16 format over the wire, I think you get ~
20 MS/s per channel max. Do you transmit the same data over all channels
(so the CPU has to generate the BW of a single channel, e.g., 20 MS/s), or
different data (so the CPU has to generate up to NUM_OF_CHANNELS *
BW_PER_CHANNEL -> 120 MS/s)?
On Wed, Jun 7, 2017 at 10:43 AM Julian Arnold via USRP-users <
[email protected]> wrote:
> Hey,
>
> > I need a system that would be able to service these 6 x310s at the
> > same time
> if you want 6 TX streams wouldn't 3 x310s already do the job?
>
> Maybe you could consider using RFNoC to do some of the signal processing
> required for OFDM and thereby reduce the processing load on your host by
> a lot.
>
> For an example using PCIe take a look at [1].
>
> [1] http://ieeexplore.ieee.org/document/7063446/#full-text-section
>
> Cheers,
> Julian
>
>
> On 06/07/2017 09:12 AM, Nikita Airee via USRP-users wrote:
> > Hi Gilad, thank you for your response! The operation being performed
> > would definitely not just be noise transmission but full fledged OFDM
> > modulation. I'm working with gr-ieee802-11 specifically.
> >
> > I connect the x310 device using 1GigE during normal operations. My
> > system works without many glitches for at least two USRPs connected at
> > the same time. Unfortunately, I don't have the necessary equipment to
> > test if it could service more than 2 as well. But I also have an
> > option of using PCIe.
> >
> > On Wed, Jun 7, 2017 at 10:33 AM, Gilad Beeri (ApolloShield)
> > <[email protected] <mailto:[email protected]>> wrote:
> >
> > Hi Nikita,
> > I believe that the sample rates you want to use are a critical
> > factor for the system spec, in addition to the transmitted signal
> > characteristics (e.g., modulating an OFDM signal will require more
> > CPU resources than transmitting noise).
> >
> > How do you connect the X310 devices to your laptop?
> >
> >
> > On Tue, Jun 6, 2017 at 11:42 AM Nikita Airee via USRP-users
> > <[email protected] <mailto:[email protected]>>
> > wrote:
> >
> > Hello everyone,
> >
> > I would like to create a 6x6 MIMO setup with my x310s and
> > n210s. The transmitters have to be synchronized and hence have
> > to be powered by the same system but the receivers can driven
> > separately by distinct hosts. To use multiusrp configuration,
> > driven by a single host, I need a system that would be able to
> > service these 6 x310s at the same time.
> > My current system is a Lenovo Thinkpad w530 with processor:
> > Intel? Core? i5-3320M CPU @ 2.60GHz ? 4. This one I believe
> > would fall short. It is anyway underpowered at 20M sampling rate.
> > So what type of a system should I have for smooth operation of
> > my setup? Any and all suggestions are welcome.
> >
> > Bests,
> > Nikita Airee
> >
> >
> > _______________________________________________
> > USRP-users mailing list
> > [email protected] <mailto:[email protected]>
> >
> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
> > <
> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com>
> >
> >
> >
> >
> > _______________________________________________
> > USRP-users mailing list
> > [email protected]
> > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
>
> --
> Julian Arnold, M.Sc.
>
> Institute for Networked Systems
> RWTH Aachen University
>
> Kackertstrasse 9
> 52072 Aachen
> Germany
>
>
> _______________________________________________
> USRP-users mailing list
> [email protected]
> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://lists.ettus.com/pipermail/usrp-users_lists.ettus.com/attachments/20170607/cea73906/attachment-0001.html>
------------------------------
Subject: Digest Footer
_______________________________________________
USRP-users mailing list
[email protected]
http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
------------------------------
End of USRP-users Digest, Vol 82, Issue 7
*****************************************
