Assessing the Impact of In-Band Crosstalk on the Performance of M-QAM Coherent Receivers using the Error Vector Magnitude
Assessing the Impact of In-Band Crosstalk on the Performance of M-QAM Coherent Receivers using the Error Vector Magnitude, Proc Conf. on Telecommunications - ConfTele, Aveiro, Portugal, Vol. 1, pp. 1 - 1, September, 2015.
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In this work, the error vector magnitude (EVM) is
used as a tool to study the impact of in-band crosstalk on the
performance of a coherent receiver with polarization division
multiplexing at a bit rate of 100 Gbps. The accuracy of the
EVM method on the estimation of the optical signal-to-noise
ratio (OSNR) penalty due to in-band crosstalk is studied by
comparison with the results obtained from direct error counting
using Monte-Carlo simulation. We show that the EVM method
is sufficiently accurate to estimate the crosstalk level that leads
to a 1 dB OSNR penalty. However, it becomes inaccurate when
estimating the OSNR penalty due to higher crosstalk levels and
lower duty-cycles on the selected and interfering signals.