Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/10740
Title: Fast and robust blind chromatic dispersion estimation using auto-correlation of signal power waveform for digital coherent systems
Authors: Sui, Q
Lau, APT
Lu, C 
Keywords: Autocorrelation
chromatic dispersion
coherent detection
digital signal processing
Issue Date: 2013
Publisher: Institute of Electrical and Electronics Engineers
Source: Journal of lightwave technology, 2013, v. 31, no. 2, 6375746, p. 306-312 How to cite?
Journal: Journal of lightwave technology 
Abstract: We propose a chromatic dispersion (CD) estimation technique by using the auto-correlation of signal power waveform for DSP based coherent systems. For single-carrier polarization-division-multiplexed (PDM) systems assuming Gaussian pulse shapes, we analytically show that the auto-correlation of signal power waveform contains a peak whose location is indicative of the accumulated CD and is insensitive to amplified spontaneous emission (ASE) noise, laser frequency offset, laser phase noise and first-order polarization-mode dispersion (PMD) and applicable to single-carrier phase-shift keyed (PSK) and quadrature-amplitude modulation (QAM) systems. As a linear scan of a preset range of CD is not needed, the number of symbols of the proposed technique is dramatically reduced. Simulation results show that to estimate the link CD for 112 Gb/s PDM-QPSK and 224 Gb/s PDM-16-QAM systems, 8192 symbols are sufficient for NRZ/RZ pulse shapes and 32768 symbols are sufficient for root-raised-cosine pulse shapes with the roll-off factor as low as 0.1 with estimation error below 175 ps/nm and 400 ps/nm, respectively.
URI: http://hdl.handle.net/10397/10740
ISSN: 0733-8724
EISSN: 1558-2213
DOI: 10.1109/JLT.2012.2231400
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