G. Einarsson et al., ERROR-PROBABILITY EVALUATION OF OPTICAL-SYSTEMS DISTURBED BY PHASE NOISE AND ADDITIVE NOISE, Journal of lightwave technology, 13(9), 1995, pp. 1847-1852
A direct and efficient method for evaluation of the error probability
of optical heterodyne receivers in the presence of phase noise is pres
ented. A closed form expression for the statistics of the decision var
iable, including photodetector shot noise and thermal noise from elect
ronic circuitry, is derived. The analysis assumes simple integrating f
ilters in the receiver and is based on a power series expansion of the
filtered phase noise. The error probability is calculated using a sad
dle point approximation which is numerically simple and gives accurate
results. The optimal prefilter bandwidth for best phase noise rejecti
on is easily determined.