# 5G NR SSB SSS Power Calculator

This Page provides information about 5G NR SSB SSS Power Calculator. Calculator help you to get major RNP Design (for SS-RSRP) paramerts: Cell SSB SSS EPRE Beam Power and UT (UE) Receiver sensitivity for SSB (dBm) depends on AAU/RRU/RRH and UT Power, Frequency Range and Bandwidth Configurations. Calculator is based on 3GPP communication standards.

RNP design level SS-RSRP level depends of SSB SSS EPRE Beam Power.

You can use Result of 5G NR SSB SSS Power Calculator to get 5G NR RNP Design Cell Range from our 5G NR Link budget calculator

Update1: Bandwidth of SSB RE Fix (Thx Andy)

Update2: Fix calculator name. Fix Major mistakes at calculation (Thx Marco)

Update3: Fix Beam EPRE at calculation

Update4: Fix Bandwidth of SSB (thx Thomas)

Update4: Add Beam Modes for TX >= 8

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• Anonymous

Dear Oleg,
thank you for this comprehensive tool.
Can you give me more insights (formulars) regrading the calculation of SSS EPRE Power and Bandwidth of SSB RE.?
I’m wondering to achieve a Bandwidth of SSB of 7.2 MHz selecting a BW of 5MHz!?

Andy

• OlegV@5GTools

Dear, Andy!
It was crazy mistake ðŸ™‚ at formulas

To get Bandwidth of SSB RE i use this formulas:
Bandwidth of SSB RE = Subcarrier Spacing (Âµ),Hz*ROUNDUP(10*log10(max(20*12*IF( Frequency Range FR1orFR2==1,30000,240000)/Subcarrier Spacing (Âµ),XXX)))
Where XXX -> CSI-RS REs allocation ->”insights information” (i cant share it)
Regard Oleg

• Aymen

Dear Oleg,
Thank you for this interesting calculator. Can you give more information on how you compute the SSS EPRE Power please?
Thanks,
Aymen

• Hossam Alkhori

XXX is always 240, but is there information why you use this number?

so formull is always
Bandwidth of SSB RE = Subcarrier Spacing (Âµ),Hz* 240.

Thank you very much for this tools

• Hossam Alkhori

240 is 12 subcarer *20 time frequency

• marco

Hi Oleg
Thanks for the great work.
Can you elaborate how the number of beams plays into the equation?
Thx

• OlegV@5GTools

Dear, Marco!

-10*Log10(Nbeams)

Regards, Oleg

• Robert

Dear Oleg
Could you give us formula how to calculate SSS EPRE Power?
I wonder how that formula differs from formula for EPRE Power =[Output power per TX, dBm]-10log10([No of RB per cell] *12) ?
Regards
Robert

• OlegV@5GTools

Dear, Robert!
It was mistake at formulas and calculator name.
EPRE Power =[Output power per TX, dBm]-10log10([No of RB per cell] *12) – it is correct (I used it at 5G NR SSB SSS Power Calculator). Please check!
Regards, Oleg

• Anthony Kiu Kwong Soon

Dear Oleg,

Can share the formula to calculate SSS power and SSS Total SSB Power calculation?

• OlegV@5GTools

Dear,Anthony Kiu Kwong Soon!

SSS EPRE per Tx =[Output power per TX, dBm]-10log10([No of RB per cell] *12)
SSS EPRE Beam (depend on Tx mode), for 64Tx SSS EPRE Beam = SSS EPRE per Tx+10*LOG10(64)
SSS POWER TX(SUM of EPRE) = SSS EPRE per Tx + 10*LOG10(127)
Regards, Oleg

• Anthony Kiu Kwong Soon

Thank you very much Oleg.

• Anthony Kiu Kwong Soon

Dear Oleg,

Thanks for the wonderful tool. Regarding the receiver sensitivity, my calculation as follow:
Receiver sensitivity = Thermal noise + noise figure + target SINR – receiver diversity gain
Thermal noise = -174 + 10*log(7200000) = -105.42dB
Noise figure = 4dB
Target SINR = -6dB
2 Rx beam, thus receiver diversity = -10*log(2) = 3dB
The result is -105.43 + 4 -6 – 3 = -110.44, which is 3dB different from the tool.
Could it be receiver diversity gain not considered inside the tool?

Thanks,
Anthony

• OlegV@5GTools

Dear, Anthony Kiu Kwong Soon!
It was mistake at formulas. Thank you.
Regards, Oleg

• Sandeep

Can you please elabote the difference between the SSS Power and SSB power.
What i am seeking is the SSB block power and as it contains all PSS, SSS and PBCH and you gave the formula already for SSS so shall it be like;
SSB Power= SSS+ PSS+PBCH Power
PBCH offset comes in forms of offset and i think that should be in respect of SS EPRE hence PBCH Power= SS EPRE- PBCH Offset.

Correct me if I am wrong!!

• Jim

Dear Oleg,

Thanks for your excellent work. I have some questions about the SSS EPRE Beam and SSS EPRE in massive MIMO.
When measuring the SS-RSRP, which EPRE is used? SSS EPRE Beam or SSS EPRE.
SSS EPRE Beam is related to Tx mode, but for SSB transmission, there uses broadcast beam, what is the Tx mode?

BR,

• OlegV@5GTools

Dear, Jim!
To get SS-RSRP for massive Mimo, You should to use SSS EPRE Beam (Because beam consist of sum of many TX EPRE)
SSS EPRE per Tx =[Output power per TX, dBm]-10log10([No of RB per cell] *12)
SSS EPRE Beam (depend on Tx mode), for 64Tx SSS EPRE Beam = SSS EPRE per Tx+10*LOG10(64)
Regards, Oleg

• Mary

HI OlegV@5GTools
iS IT POSSIBLE TO EXPLAIN AGAIN BANDWIDTH OF SSB RE FORMULA ? THX

• Thomas

Dear Oleg

Thanks for your great work! Please check bandwidth of SSB RE for various numerologies (subcarrier spacing). Therefore, 15kHz does represent 180 kHz, 30 kHz 360 kHz and 60 kHz 720 kHz, etc. a.s.o. 1440 kHz is reserved for FR2! Please also correct the formula for receiver sensitivity, accordingly. Thanks a lot!

Regards, Thomas

• OlegV@5GTools

Dear, Thomas
Fixed, Thanks!
Regards, Oleg

• Anonymous

Dear Oleg why did you use 64 Tx in SSS EPRE Beam calculation. Does a ue have 64rx?

• Jalol

Dear Oleg,
Thank you for providing with good tool.
Can you help me find tool related to 5G Power Consumption Calculation, please?
Thank You!

Regards, Jalol

• Amit Shah

Dear Oleg,
Thanks for providing a great tool.

I am using 53dBm RRH power and 8TX combination but i am getting Number of Beams as “Default (Four Beam sequentially)” and i cannot uncheck the value. Resultant SS EPRE beam power is 8.85 dBm. I would like to calculate power without using “Four Beam sequentially”.
Please advice on how to uncheck the “Default (Four Beam sequentially)” in the number of Beams so that i can get power for our scenario.

Thanks and Regards,
Amit Shah

• OlegV@5GTools

Dear, Amit Shah!
I added more Number of Beams modes for Tx>8
Regards, Oleg

Dears,
in 5G after calculating SSS-EPRE how to calculate
PBCH EPRE offset db..?
PDSCH EPRE offset db..?
PDCCH EPRE offset db..?

• Dmitry Kireev

Dear Oleg,
Thanks for the job!
There is one thing which I can’t understand. Power is the amount of energy transferred or converted per unit of time, which means that when calculating the SSS EPRE time must be considered. But there are no variables in the formulas depending on time. Can you explain why there is no dependency on the time?

• OlegV@5GTools

Dear, Dmitry!
We should to calculate power per ofdm symbol (one moment of time)
Regards, Oleg V.

• Dmitry

Dear Oleg,
If we calculate the power for one OFDM symbol we should reduce the Tx power on 10*Log10(1/N_frame_slot/N_slot_symb/). Am I wrong?

• OlegV@5GTools

Dear, Dmitry!
Nope, RRU use full power per one ofdm symbol (per symb)
For example: Full power for first ofdm symbol, full power for second ofdm symbol etc.
Regard, Oleg

• Omer

Hello,

Thank for the helpful content. I would like to us you how to define target DL/UL SINR?

• OlegV@5GTools

Dear, Omer
SINR ->CQi->MCS is confidential information for Vendors equipment
We dont have it. You should ask vendor

But anyway you can use this (As Is):
QPSk Spectral efficiency: 0.2344 â€“ SINR: -6 dB
16QAM Spectral efficiency: 2.5703 -SINR 9 dB
64QAM Spectral efficiency: 5.1152 -SINR 21dB
256QAM Spectral efficiency: 7.4063 -SINR 35 dB
Regards,Oleg

• Li

Dear Oleg,

Can I calculate SSS-RSRP by “SSS EPRE beam – Full Pathloss “? Or should I use “SSS EPRE per TX “?
Could you please tell me which 3GPP standards I can check ?

Thank you a lot !!

• Li

Dear Oleg,

Thank you very much for the useful tool !

I used “SSS EPRE per TX + 10*log(Ntx) – 10 *log(Nbeam)” to calculate “SSS EPRE beam”, when TX=4, Nbeam = 4 , SSS EPRE per TX = 8.85, I got “11.86dBm ” as result , but the website says SSS EPRE beam is 8.86dBm.

Could you please tell me where I did wrong ?

Thank you a lot again ! !

• MO. A

Hi, Can you please clarify what is ‘127’ value in this equation? Is there any reference for that?
SSS POWER TX(SUM of EPRE) = SSS EPRE per Tx + 10*LOG10(127)