TITLE:
Metrology of Optical Communication Systems Using Error Vector Magnitude
AUTHORS:
Irshaad Fatadin
KEYWORDS:
Carrier Phase Recovery, Error Vector Magnitude (EVM), Quadrature Amplitude Modulation (QAM)
JOURNAL NAME:
Journal of Applied Mathematics and Physics,
Vol.9 No.11,
November
23,
2021
ABSTRACT: Error vector magnitude (EVM) as a performance metric for M-ary quadrature amplitude modulation (QAM) formats in optical coherent systems is presented. It is shown that the calibrated BER, which would otherwise be under-estimated without the correction factor, can reliably monitor the performance of optical coherent systems near the target BER of 10-3 for quadrature phase shift keying (QPSK), 16-QAM, and 64-QAM employing carrier phase recovery with differential decoding to compensate for laser phase noise. The impact on the number of symbols used to estimate the BER from EVM analysis is also presented and compared to the BER obtained by error counting.