Patent · US Active

Frame/symbol synchronization in coherent optical OFDM

US9036999B2 · kind B2 · utility

3Cited by

3References

18Claims

0Family size

Assignee

Alcatel Lucent · FR

Inventors

Noriaki Kaneda · Westfield, US
Timo Pfau · Westfield, US
Qi Yang · Nanhu, CN

Key dates

Filing date	Jul 29, 2011
Grant date	May 19, 2015
Priority date	—
Expiry date	Jul 30, 2033

Classification

Technology area (CPC H)Electricity
CPC primaryH04L27/2692
WIPO fieldDigital communication
WIPO sectorElectrical engineering

Abstract

One aspect provides an optical communication system. The system includes an optical-to-digital converter, a frequency estimator and a symbol synchronizer. The optical-to-digital converter is configured to receive an optical OFDM bit stream including an OFDM symbol bearing payload data and a symbol header preceding the OFDM payload data. The frequency estimator is configured to determine a carrier frequency offset of the payload data from the symbol header. The symbol synchronizer is configured to determine a starting location of the payload data within the bit stream by cross-correlating a synchronization pattern within the symbol header with a model synchronization pattern stored by the symbol synchronizer.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.