B.3 Modified signal under test

38.1083GPPNRRelease 17Satellite Access Node radio transmission and receptionTS

Implicit in the definition of EVM is an assumption that the receiver is able to compensate a number of transmitter impairments. The signal under test is equalized and decoded according to:

where

is the time domain samples of the signal under test.

is the sample timing difference between the FFT processing window in relation to nominal timing of the ideal signal. Note that two timing offsets are determined, the corresponding EVM is measured and the maximum used as described in annex B.7.

is the RF frequency offset.

is the phase response of the TX chain.

is the amplitude response of the TX chain.