Real-time Synchronous 16-QAM Optical Transmission System Using Blind Phase Search and QPSK Partitioning Carrier Recovery Techniques

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

Proceedings: Photonische Netze

Pages: 3Language: englishTyp: PDF

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Al-Bermani, Ali; Puntsri, Kidsanapong; Jan, Omar; Noé, Reinhold (University of Paderborn, EIM-E, Warburger Str. 100, 33098 Paderborn, Germany)
Wördehoff, Christian; Rückert, Ulrich (Bielefeld University, CITEC, Universitätsstr. 21, 33615 Bielefeld, Germany)

In this article we present the influence of the required resolution of the analog-to-digital converter (ADC), which is a challenge of real-time coherent transmission systems. Two techniques of feedforward carrier phase recovery (Blind Phase Search (BPS) and QPSK partitioning (QPSKP)) were implemented and a real-time 16-QAM data throughput of 2.5 Gbit/s was achieved in a field-programmable gate array (FPGA) based coherent receiver with different phase estimation filter lengths.