SciELO - Scientific Electronic Library Online

vol.10 issue1Transmission of a 20 Gb/s NRZ OOK signal throughout a 390 km fiber link and a cascade of 11 x 50 GHz filters and 9 x EDFAsFBG optimization using spline encoded evolution strategy author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand




Related links


Journal of Microwaves, Optoelectronics and Electromagnetic Applications

On-line version ISSN 2179-1074


PORTELA, Thiago F. et al. Analysis of signal processing techniques for optical 112 Gb/s DP-QPSK receivers with experimental data. J. Microw. Optoelectron. Electromagn. Appl. [online]. 2011, vol.10, n.1, pp.155-164. ISSN 2179-1074.

This paper evaluates several signal processing techniques for optical dual-polarization quadrature phase-shift keying (DP-QPSK) coherent receivers, using offline post-processing of experimental data. In addition to electronically separating the two polarization multiplexed signals, the investigated signal processing algorithms also compensate for chromatic dispersion (CD) and polarization mode dispersion (PMD). In particular, we investigate two distinct architectures: 1) Constant modulus algorithm (CMA) equalization followed by feedforward phase recovery. 2) Decision-directed least mean square (DD-LMS) equalization combined with decision-directed phase recovery. The interplay of both architectures with bulk dispersion compensators and carrier recovery algorithms is also analyzed.

Keywords : Blind equalization; coherent receiver; optical communications; polarizations demultiplexing.

        · text in English     · English ( pdf epdf )


Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License