Please use this identifier to cite or link to this item: https://doi.org/10.1109/JLT.2013.2260723
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dc.titleOn decision aided carrier phase and frequency offset estimation in coherent optical receivers
dc.contributor.authorMeiyappan, A.
dc.contributor.authorKam, P.-Y.
dc.contributor.authorKim, H.
dc.date.accessioned2014-10-07T04:33:44Z
dc.date.available2014-10-07T04:33:44Z
dc.date.issued2013
dc.identifier.citationMeiyappan, A., Kam, P.-Y., Kim, H. (2013). On decision aided carrier phase and frequency offset estimation in coherent optical receivers. Journal of Lightwave Technology 31 (13) : 2055-2069. ScholarBank@NUS Repository. https://doi.org/10.1109/JLT.2013.2260723
dc.identifier.issn07338724
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/82806
dc.description.abstractWe investigate carrier estimation (CE) for coherent optical receivers where the received signal is impaired by additive white Gaussian noise, laser phase noise, and frequency offset. Best practical 4-, 8-, and 16-point constellations are identified. A generalized differential encoding rule for signal constellations is presented. Performance of our complex-weighted decision-aided maximum-likelihood (CW-DA-ML) phase noise and frequency offset estimator is analyzed at low signal-to-noise ratio (SNR) and the optimal filter lengths are found. CW-DA-ML CE is put in perspective with respect to two fundamental estimators in the literature: (i) differential frequency estimator followed by block $M$th power phase estimator (DiffFE-$M$th CE), and (ii) fast Fourier transform based frequency estimator followed by block $M$th power phase estimator (FFTbE-$M$ th CE), in terms of laser linewidth tolerance, frequency estimation range and speed, SNR threshold, and cycle slip probability. CW-DA-ML CE is 2.5 and 10.5 times faster than DiffFE-$M$ th CE in 4 phase-shift keying and 16 quadrature amplitude modulation signals, respectively, at a 1-dB system penalty for a bit-error rate of $10-3. Our CE has lower cycle slip probability and transmission overhead than DiffFE-$M$th and FFTbE-$M$th CE. Hence, our CE is shown to be favourable in pilot-assisted (PA) systems. A PA CW-DA-ML CE is introduced and shown to be robust against time-varying frequency offset with minimal training overhead. Analog-to-digital convertor quantization error on our CE performance is also addressed. © 1983-2012 IEEE.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1109/JLT.2013.2260723
dc.sourceScopus
dc.subjectBlock $M$th power
dc.subjectcycle slip
dc.subjectdifferential encoding
dc.subjectfast Fourier transform
dc.subjectfrequency offset
dc.subjectlaser phase noise
dc.typeArticle
dc.contributor.departmentELECTRICAL & COMPUTER ENGINEERING
dc.description.doi10.1109/JLT.2013.2260723
dc.description.sourcetitleJournal of Lightwave Technology
dc.description.volume31
dc.description.issue13
dc.description.page2055-2069
dc.description.codenJLTED
dc.identifier.isiut000319682100001
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