title: Simple feed-forward wide-range frequency offset estimator for optical coherent receivers.
abstract: We propose and experimentally demonstrate a hardware-efficient, feed-forward, wide-range frequency offset estimator for DSP-based optical coherent receivers. Using a simple relationship of signal spectrum, this estimator is capable to estimate offsets in a range compliant with OIF requirements. Obtained results show that this estimator has a high tolerance to spectrum asymmetry caused by electrical and optical signal filtering, even when using return-to-zero pulse shaping.
authors.affiliation: Reconfigurable Optical Systems Laboratory, CPqD Foundation, SP-340 Highway, km 118.5, Campinas, SP, 13086- 902, Brazil. diniz@cpqd.com.br
authors.forename: J C M
authors.initials: JC
authors.lastname: Diniz
authors.forename: J C R F
authors.initials: JC
authors.lastname: de Oliveira
authors.forename: E S
authors.initials: ES
authors.lastname: Rosa
authors.forename: V B
authors.initials: VB
authors.lastname: Ribeiro
authors.forename: V E S
authors.initials: VE
authors.lastname: Parahyba
authors.forename: R
authors.initials: R
authors.lastname: da Silva
authors.forename: E P
authors.initials: EP
authors.lastname: da Silva
authors.forename: L H H
authors.initials: LH
authors.lastname: de Carvalho
authors.forename: A F
authors.initials: AF
authors.lastname: Herbster
authors.forename: A C
authors.initials: AC
authors.lastname: Bordonalli