Journal article
Joint Iterative Carrier Synchronization and Signal Detection Employing Expectation Maximization
Department of Photonics Engineering, Technical University of Denmark1
Metro-Access and Short Range Systems, Department of Photonics Engineering, Technical University of Denmark2
Centro de Pesquisa e Desenvolvimento em Telecomunicações3
Department of Applied Mathematics and Computer Science, Technical University of Denmark4
Cognitive Systems, Department of Applied Mathematics and Computer Science, Technical University of Denmark5
In this paper, joint estimation of carrier frequency, phase, signal means and noise variance, in a maximum likelihood sense, is performed iteratively by employing expectation maximization. The parameter estimation is soft decision driven and allows joint carrier synchronization and data detection. The algorithm is tested in a mixed line rate optical transmission scenario employing dual polarization 448 Gb/s 16-QAM signal surrounded by eight on-off keying channels in a 50 GHz grid.
It is shown that joint carrier synchronization and data detection are more robust towards optical transmitter impairments and nonlinear phase noise, compared to digital phase-locked loop (PLL) followed by hard decisions. Additionally, soft decision driven joint carrier synchronization and detection offers an improvement of 0.5 dB in terms of input power compared to hard decision digital PLL based carrier synchronization and demodulation.
Language: | English |
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Publisher: | IEEE |
Year: | 2014 |
Pages: | 1608-1615 |
ISSN: | 15582213 and 07338724 |
Types: | Journal article |
DOI: | 10.1109/JLT.2014.2308636 |
ORCIDs: | Zibar, Darko , Borkowski, Robert , Schmidt, Mikkel Nørgaard and Tafur Monroy, Idelfonso |