B.2 Basic unit of measurement

38.1083GPPNRRelease 17Satellite Access Node radio transmission and receptionTS

The basic unit of EVM measurement is defined over one slot in the time domain and subcarriers in the frequency domain:

where

T is the set of symbols with the considered modulation scheme being active within the slot,

is the set of subcarriers within the subcarriers with the considered modulation scheme being active in symbol t,

is the ideal signal reconstructed by the measurement equipment in accordance with relevant Tx models,

is the modified signal under test defined in annex B.3.

NOTE: Although the basic unit of measurement is one slot, the equalizer is calculated over 10 ms measurement interval to reduce the impact of noise in the reference signals. The boundaries of the 10 ms measurement intervals need not be aligned with radio frame boundaries.