title: Performance comparison of optical 8-ary differential phase-shift keying systems with different electrical decision schemes.
abstract: We examine the performance of optical 8-ary differential phase-shift keying transmission systems according to the type of receiver structure and modulation format. Compared with the approach based on a multilevel decision, we found that a bilevel receiver provides 3-dB gain in optical signal-to-noise ratio sensitivity and is more robust against chromatic dispersion for either nonreturn-to-zero or return-to-zero modulation.
authors.forename: Hosung
authors.initials: H
authors.lastname: Yoon
authors.forename: Duckey
authors.initials: D
authors.lastname: Lee
authors.forename: Namkyoo
authors.initials: N
authors.lastname: Park