Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/5799
Title: Simultaneous and independent multi-parameter monitoring with fault localization for DSP-based coherent communication systems
Authors: Shen, TSR
Lau, APT 
Yu, C
Keywords: Communication systems
Fiber opitc networks
Frequency allocation
Optical communication
Optical signal processing
Signal processing
Signal receivers
Signal to nosie ratio
Issue Date: 8-Nov-2010
Publisher: Optical Society of America
Source: Optical express, 8 Nov. 2010, v. 18, no. 23, p. 23608-23619 How to cite?
Journal: Optical express 
Abstract: Digital signal processing (DSP)-based coherent communications have become standard for future high-speed optical networks. Implementing DSP-based advanced algorithms for data detection requires much more detailed knowledge of the transmission link parameters, resulting in optical performance monitoring (OPM) being even more important for next generation systems. At the same time, the DSP platform also enables new strategies for OPM. In this paper, we propose the use of pilot symbols with alternating power levels and study the statistics of the received power and phase difference to simultaneously and independently monitor the carrier frequency offset between transmitter and receiver laser, laser linewidth, number of spans, fiber nonlinearity parameters as well as optical signal-to-noise ratio (OSNR) of a transmission link. Analytical predictions are verified by simulation results for systems with full chromatic dispersion (CD) compensation per span and 10% CD under-compensation per span. In addition, we show that by monitoring the changes in the statistics of the received pilot symbols during network operation, one can locate faults or OSNR degradations along a transmission link without additional monitoring equipments at intermediate nodes, which may be useful for more efficient dynamic routing and network management.
URI: http://hdl.handle.net/10397/5799
EISSN: 1094-4087
DOI: 10.1364/OE.18.023608
Rights: © 2010 Optical Society of America. This paper was published in Optics express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/abstract.cfm?URI=oe-18-23-23608. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.
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