 # 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

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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 🙂 at formulas

To get Bandwidth of SSB RE i use this formulas:
Bandwidth of SSB RE = Subcarrier Spacing (µ),Hz*ROUNDUP(10*log10(max(20*12*IF( Frequency Range FR1orFR2==1,30000,240000)/Subcarrier Spacing (µ),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

• 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.