Soft-Decision Turbo Decoding for Coherent Transmission with Phase Slips

Conference: Photonische Netze - 13. ITG-Fachtagung
05/07/2012 - 05/08/2012 at Leipzig, Germany

Proceedings: Photonische Netze

Pages: 5Language: englishTyp: PDF

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Bisplinghoff, A.; Schmauss, B. (University Erlangen, Germany)
Langenbach, S. (Cisco Optical GmbH, Nuremberg, Germany)

We investigate the impact of frequent phase slips on turbo decoding of low density parity check codes combined with differentially encoded QPSK. Iterative joint soft differential demodulation and soft-decision decoding improves the signal to noise ratio performance of coherently demodulated QPSK, but compromises its phase slip resilience.