Different aspects of probabilistic shaping for a multispan optical communication system are
studied. First, a numerical analysis of the additive white Gaussian noise (AWGN) channel …

The FEC limit paradigm is the prevalent practice for designing optical communication
systems to attain a certain bit error rate (BER) without forward error correction (FEC). This …

In this paper, achievable information rates (AIR) for fiber optical communications are
discussed. It is shown that AIRs such as the mutual information and generalized mutual …

Probabilistic shaping based on constant composition distribution matching (CCDM) has
received considerable attention as a way to increase the capacity of fiber optical …

This paper reviews the performance of optimized modulation formats in two, four, and eight
dimensions. We present performance (lower bounds) for higher dimensions by exploiting …

In optical fiber communication, optical and electrical components introduce nonlinearities,
which require effective compensation to attain highest data rates. In particular, in short reach …

The implementation difficulties of combining distribution matching (DM) and dematching
(invDM) for probabilistic shaping (PS) with soft-decision forward error correction (FEC) …

Information-Theoretic Tools for Optical Communications Engineers Page 1 Information-Theoretic
Tools for Optical Communications Engineers (Invited Tutorial) Erik Agrell Department of …

Shaping modulation formats in multi-dimensional (MD) space is an effective approach to
harvest spectral efficiency gains in both the additive white Gaussian noise (AWGN) channel …

Recent decades have witnessed steady improvements in our ability to harness the
information-carrying capability of optical fibres. Will this process continue, or will progress …