Outage Probability Due to PMD in Coherent PDM QPSK Systems With Electronic Equalization
| Autor: | Thomas Kamalakis, N. Mantzoukis, L. Raptis, A. Vgenis, C.S. Petrou, Ioannis Roudas |
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| Rok vydání: | 2010 |
| Předmět: |
Finite impulse response
Monte Carlo method Equalization (audio) Optical polarization Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Polarization mode dispersion Electronic engineering Probability distribution Electrical and Electronic Engineering Optical filter Algorithm Computer Science::Information Theory Mathematics Phase-shift keying |
| Zdroj: | IEEE Photonics Technology Letters. 22:1247-1249 |
| ISSN: | 1941-0174 1041-1135 |
| Popis: | Polarization-division-multiplexed (PDM) quadrature phase-shift-keying (QPSK) coherent optical systems employ blind adaptive electronic equalizers for polarization-mode dispersion compensation. In this letter, we compare the performance of fractionally spaced, linear electronic equalizers, composed of four parallel finite impulse response (FIR) filters of various lengths, using the outage probability as a performance criterion. The constant modulus algorithm is applied for the adaptation of FIR filter coefficients. A parallel programming implementation of the multicanonical Monte Carlo method is adopted for the estimation of the tails of the outage probability distribution. It is shown that less than 20 complex, half-symbol-period-spaced taps per FIR filter suffice, in order to reduce the outage probability of PDM QPSK coherent optical systems to less than 10-5 , for a mean differential group delay up to twice the symbol period. |
| Databáze: | OpenAIRE |
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