B.7 Averaged EVM

36.1083GPPEvolved Universal Terrestrial Radio Access (E-UTRA)Release 18Satellite Access Node radio transmission and receptionTS

EVM is averaged over all allocated downlink resource blocks with the considered modulation scheme in the frequency domain, and a minimum of 10 downlink subframes:

For FDD the averaging in the time domain equals the 10 subframe duration of the 10 subframes measurement period from the equalizer estimation step.

Where Ni is the number of resource blocks with the considered modulation scheme in subframe or sTTI i and N_dl is the number of allocated downlink subframes or sTTI in one frame.

The EVM requirements shall be tested against the maximum of the RMS average at the window W extremities of the EVM measurements:

Thus is calculated using in the expressions above and is calculated using in the calculation.

Thus we get:

The averaged EVM with the minimum averaging length of at least 10 subframes is then achieved by further averaging of the results

,

Annex C (normative):
Characteristics of the interfering signals

Annex D (informative):
Change history

Change history
Date	Meeting	TDoc	CR	Rev	Cat	Subject/Comment	New version
2022-08	RAN4#104-e	R4-2215119				Draft spec for TS 36.108	0.0.1
2022-11	RAN4#105	R4-2219362				R4-2220296 TP for TS 36.108: Section 1,2,3 R4-2220297 TP for TS 36.108: Clause 7 R4-2220298 TP for TS 36.108: Clause 10 R4-2219369 TP for TS 36.108: Annex R4-2220300 TP for SAN RF requirement clause 9 R4-2220301 TP for SAN RF requirement clause 6 R4-2220302 TP to TS 36.108 (section 4) R4-2220614 TP to TS 36.108 (section 5)	0.1.0
2022-12	RAN#98e	RP-223092				Draft version for approval to RAN Plenary meeting: RP-223092 TS 36.108 v1.0.0 Evolved Universal Terrestrial Radio Access (E-UTRA);Satellite Access Node radio transmission and reception	1.0.0

Change history
Date	Meeting	TDoc	CR	Rev	Cat	Subject/Comment	New version
2022-12	RAN#98-e					Approved by plenary – Rel-18 spec under change control	18.0.0