Soft-FEC Implementation for High-Speed Coherent Optical OFDM Systems

Conference: Photonische Netze - 11. ITG-Fachtagung
05/03/2010 - 05/04/2010 at Leipzig, Germany

Proceedings: Photonische Netze

Pages: 6Language: englishTyp: PDF

Personal VDE Members are entitled to a 10% discount on this title

Masalkina, E.; Bülow, H. (Universität Erlangen-Nürnberg, Lehrstuhl für Informationsübertragung (LIT), Cauerstr. 7, 91058 Erlangen, Germany)
Dischler, R.; Bülow, H. (Bell Labs, Alcatel-Lucent Deutschland AG, Germany)
Matuszak, M.; Urbansky, R. (Technische Universität Kaiserslautern, Lehrstuhl für Nachrichtentechnik, Gottlieb-Daimler-Str., 67663 Kaiserslatern, Germany)

Nowadays one of the discussed solutions for optical transmission systems at 100 Gbit/s (N x 100 Gbit/s) and beyond is coherent optical orthogonal frequency division multiplexing (CO-OFDM). Commonly hard-decision forward error correction (FEC) with the redundancy of 7% is assumed. Recently the improvement of the receiver sensitivity was analyzed by using a low density parity check (LDPC) code that is one of the promising candidates for 100 Gbit/s soft-FEC. In this work we assess the efficiency and investigate the implementation of soft-FEC with LDPC codes with overheads between 7% and 50% in coherent optical OFDM systems.