Implementation of Carrier Phase Recovery Circuits for Optical Communication
Licentiate thesis, 2020
One part of the DSP for a coherent fiber-optic link is the carrier phase recovery (CPR) unit, which can account for a significant portion of the DSP power dissipation, especially for shorter links. A wide range of CPR algorithms is available, but reliable estimates of their power efficiency is missing, making accurate comparisons impossible. Furthermore, much of the current literature does not account for the limited precision arithmetic of the DSP.
In this thesis, we develop circuit implementations based on a range of suggested CPR algorithms, focusing on power efficiency. These circuits allow us to contrast different CPR solutions based not only on power dissipation, but also on the quality of the phase estimation, including fixed-point arithmetic aspects. We also show how different parameter settings affect the power efficiency and the implementation penalty. Additionally, the thesis includes a description of our field-programmable gate-array fiber-emulation environment, which can be used to study rare phenomena in DSP implementations, or to reach very low bit-error rates. We use this environment to evaluate the cycle-slip probability of a CPR implementation.
Digital Signal Processing
Application-Specific Integrated Circuits
Carrier Phase Recovery
Chalmers, Computer Science and Engineering (Chalmers), Computer Engineering (Chalmers), Electronics Systems
VLSI Implementations of Carrier Phase Recovery Algorithms for M-QAM Fiber-Optic Systems
Journal of Lightwave Technology,; Vol. 38(2020)p. 3616-3623
Towards FPGA Emulation of Fiber-Optic Channels for Deep-BER Evaluation of DSP Implementations
Optics InfoBase Conference Papers,; Vol. Part F137-SPPCom 2019(2019)
Paper in proceeding
Cycle-Slip Rate Analysis of Blind Phase Search DSP Circuit Implementations
2020 Optical Fiber Communications Conference and Exhibition, OFC 2020 - Proceedings,; (2020)
Paper in proceeding
E. Börjeson, and P. Larsson-Edefors, "Energy-efficient implementation of carrier phase recovery for higher-order modulation formats"
Other Electrical Engineering, Electronic Engineering, Information Engineering
Chalmers University of Technology
Opponent: Prof. Gabriella Bosco, Department of Electronics and Telecommunications, Polytechnic University of Turin, Italy