Recent Advances in Real-Time GPU-Based Digital Signal Processing for Optical Communications
The use of general purpose graphics processing unit for real-time digital signal processing of optical signals for long distance transmission is demonstrated. We show an implementation of the Kramers-Kronig coherent receiver capable of processing 1GBaud 4-, 8-, 16-, 32-, and 64-QAM minimum phase signals. We evaluate a 91km field trial link as well as a straight-line 10000km link with multiple modulation formats. We discuss the real-time implementation as well as its long term stability. Finally, we discuss future applications of this technology. In particular for dedicated long distance communications between data centers.
Ruben S. Luís
National Institute of Information and Communications Technology (Japan)