how i get SNR and SINR values?

[meriemsmache]

hello ns3-users
i need to calculate IR (interfernce ration), i know that IR =( SINR/
SNR)
SINR is Signal to Interference plus Noise Ratio and SNR is Signal-to-
noise ratio
i know that SNR and SINR are calculated in interference helper
So , could someone give me an idea (guide me )how i call those
value (snr and sinr)?

[陈旋]

I found it is hard because of no interface to call them. when i set up a wifi network, it seems to be called by the model  function. if you must, i think you can modify the model.

2012/4/19 meriemsmache <merie...@yahoo.fr>

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[Smach Meriem]

hello

it's me again i'm new in ns-3 , so please can u explain for me how u did that ?

can u give an example please ,

 thank you

---

De : Smach Meriem <merie...@yahoo.fr>
À : ns-3-...@googlegroups.com
Envoyé le : Jeudi 19 avril 2012 17h52
Objet : Re : how i get SNR and SINR values?

thank u very much  
but can explain 4 me how u did that please?

---

De : 陈旋 <hitch...@gmail.com>
À : ns-3-...@googlegroups.com
Envoyé le : Jeudi 19 avril 2012 14h17
Objet : Re: how i get SNR and SINR values?

[陈旋]

void

771 YansWifiPhy::EndReceive (Ptr<Packet> packet, Ptr<InterferenceHelper::Event> event)

772 {

773 NS_LOG_FUNCTION (this << packet << event);

774 NS_ASSERT (IsStateRx ());

775 NS_ASSERT (event->GetEndTime () == Simulator::Now ());

776

777 struct InterferenceHelper::SnrPer snrPer;

778 snrPer = m_interference.CalculateSnrPer (event);

779 m_interference.NotifyRxEnd ();

780

781 NS_LOG_DEBUG ("mode=" << (event->GetPayloadMode ().GetDataRate ()) <<

782 ", snr=" << snrPer.snr << ", per=" << snrPer.per << ", size=" << packet->GetSize ());

783 if (m_random.GetValue () > snrPer.per)

784 {

785 NotifyRxEnd (packet);

786 uint32_t dataRate500KbpsUnits = event->GetPayloadMode ().GetDataRate () / 500000;

787 bool isShortPreamble = (WIFI_PREAMBLE_SHORT == event->GetPreambleType ());

788 double signalDbm = RatioToDb (event->GetRxPowerW ()) + 30;

789 double noiseDbm = RatioToDb (event->GetRxPowerW () / snrPer.snr) - GetRxNoiseFigure () + 30;

790 NotifyMonitorSniffRx (packet, (uint16_t)GetChannelFrequencyMhz (), GetChannelNumber (), dataRate500KbpsUnits, isShortPreamble, signalDbm, noiseDbm);

791 m_state->SwitchFromRxEndOk (packet, snrPer.snr, event->GetPayloadMode (), event->GetPreambleType ());

792 }

793 else

794 {

795 /* failure. */

796 NotifyRxDrop (packet);

797 m_state->SwitchFromRxEndError (packet, snrPer.snr);

798 }

799 }

if you want to get the s or n or i, you can have a look at the YansWifiPhy.cc/.h.

m_interference is a complex class depending on the wifiphy. so i think you can only get it in the source code in the yanswifiphy.cc

2012/4/20 Smach Meriem <merie...@yahoo.fr>

[Smach Meriem]

ok thank u very much

 i think i  understand your idea , i will create a new file .cc /.h  in wich i will tag the value of snr and sinr in packet

---

De : 陈旋 <hitch...@gmail.com>
À : ns-3-...@googlegroups.com

Envoyé le : Vendredi 20 avril 2012 13h40
Objet : Re: Re : how i get SNR and SINR values?

[mohsenhs]

Hi Meriem

I have the same problem and I need to get IR, If you have done anything could you share it with me plz. Any help is highly appreciated.

Sincerely

Mohsen

[Sameer]

If you search this group you will find posts which suggest that you use tag for the SNR and SINR values. It would mean changing the wifi code of ns3. I suggest you have a look at this github repo... the wifi module there has added the tags for SNR and SINR. You could then strip those tags in your application from the packet and use the values

https://github.com/trinacriax/

[Sameer]

If you search this group you will find posts which suggest that you use tag for the SNR and SINR values. It would mean changing the wifi code of ns3. I suggest you have a look at this github repo... the wifi module there has added the tags for SNR and SINR. You could then strip those tags in your application from the packet and use the values

https://github.com/trinacriax/

On Tuesday, April 22, 2014 6:37:06 AM UTC+5:30, mohsenhs wrote:

[Mohsen Hajsalehi]

Hi Samer

Thanks for your prompt reply and special thanks for the link.

Regards,

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[Smach Meriem]

thank u very much  
but can explain 4 me how u did that please?

---

De : 陈旋 <hitch...@gmail.com>
À : ns-3-...@googlegroups.com
Envoyé le : Jeudi 19 avril 2012 14h17
Objet : Re: how i get SNR and SINR values?

[ragada...@gmail.com]

Hi
In which  repositories  I can found the wifi update