Pilot-Symbols-Aided Carrier-Phase Recovery for 100-G PM-QPSK Digital Coherent Receivers
| Autor: | Giancarlo Gavioli, Arnaldo Spalvieri, Timo Pfau, Francesco Vacondio, Marco Bertolini, Marianna Pepe, Luca Barletta, Maurizio Magarini |
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| Rok vydání: | 2012 |
| Předmět: |
Computer science
Keying Data_CODINGANDINFORMATIONTHEORY Multiplexing Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Transmission (telecommunications) Optical Carrier transmission rates TEL Electronic engineering Overhead (computing) Electrical and Electronic Engineering Carrier recovery Decoding methods Phase-shift keying |
| Zdroj: | IEEE Photonics Technology Letters. 24:739-741 |
| ISSN: | 1941-0174 1041-1135 |
| DOI: | 10.1109/lpt.2012.2187439 |
| Popis: | A feedforward pilot-symbols-aided carrier-phase recovery scheme is described. The approach relies on pilot symbols that are time-division multiplexed with the transmitted data. In the scheme, an initial coarse estimation of the optical carrier phase, exploiting the knowledge of pilot symbols, is followed by a fine nondata-aided, or blind, estimation. The main advantage of the proposed solution is that of avoiding the phase- ambiguity problem after a cycle slip. The overhead and the impact on the performance of pilot symbols are investigated for long-haul transmission of 100-Gb/s polarization-multiplexed quadrature phase-shift keying wavelength-division-multiplexing signals in different scenarios. For homogeneous transmission, the proposed scheme outperforms blind carrier recovery with differential decoding. |
| Databáze: | OpenAIRE |
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