Bayesian Phase Search for Probabilistic Amplitude Shaping

We introduce a Bayesian carrier phase recovery (CPR) algorithm which is robust against low signal-to-noise ratio scenarios. It is therefore effective for phase recovery for probabilistic amplitude shaping (PAS). Results validate that the new algorithm overcomes the degradation experienced by blind phase-search CPR for PAS.
Comment: 4 pages, 2 figures. Submitted to the 49th European Conference on Optical Communications