Please use this identifier to cite or link to this item:
|Title:||On decision aided carrier phase and frequency offset estimation in coherent optical receivers||Authors:||Meiyappan, A.
|Keywords:||Block $M$th power
fast Fourier transform
laser phase noise
|Issue Date:||2013||Citation:||Meiyappan, 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||Abstract:||We 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.||Source Title:||Journal of Lightwave Technology||URI:||http://scholarbank.nus.edu.sg/handle/10635/82806||ISSN:||07338724||DOI:||10.1109/JLT.2013.2260723|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Oct 22, 2021
WEB OF SCIENCETM
checked on Oct 13, 2021
checked on Oct 14, 2021
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.