Geometrically-Shaped Multi-Dimensional Modulation Formats in Coherent Optical…
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 and the optical fib…
Capacity Region Bounds for Optical WDM Channels Based on First-Order Regular …
It is known that fiber nonlinearities induce crosstalk in a wavelength division multiplexed (WDM) system, which limits the capacity of such systems as the transmitted signal power is increased. A n…
High-Cardinality Geometrical Constellation Shaping for the Nonlinear Fibre Ch…
This paper presents design methods for highly efficient optimisation of geometrically shaped constellations to maximise data throughput in optical communications. It describes methods to analytical…
List-Encoding CCDM : A Nonlinearity-Tolerant Shaper Aided by Energy Dispersio…
Recently, a metric called energy dispersion index (EDI) was proposed to qualitatively indicate the nonlinear interference (NLI) induced by correlated symbols during optical transmission. In this pa…
A Soft-Aided Staircase Decoder Using Three-Level Channel Reliabilities
The soft-aided bit-marking (SABM) algorithm is based on the idea of marking bits as highly reliable bits (HRBs), highly unreliable bits (HUBs), and uncertain bits to improve the performance of hard…
Temporal Energy Analysis of Symbol Sequences for Fiber Nonlinear Interference…
The stationary statistical properties of independent, identically distributed (i.i.d.) input symbols provide insights on the induced nonlinear interference (NLI) during fiber transmission. For exam…
The Partially-Coherent AWGN Channel : Transceiver Strategies for Low-Complexi…
Carrier phase estimation (CPE) is one of the key requirements to perform intradyne coherent detection in optical communication systems. Residual errors in the phase estimation at the receiver, also…
Model-Based Machine Learning for Joint Digital Backpropagation and PMD Compen…
In this article, we propose a model-based machine-learning approach for dual-polarization systems by parameterizing the split-step Fourier method for the Manakov-PMD equation. The resulting method …
Analytical Modeling of Nonlinear Fiber Propagation for Four Dimensional Symme…
Coherent optical transmission systems naturally lead to a four dimensional (4D) signal space, i.e., two polarizations each with two quadratures. In this paper we derive an analytical model to quant…
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