376 citations · 2.9k across the 110 of their papers we have counts for
8 papers · 1 filter
Information Rates and post-FEC BER Prediction in Optical Fiber Communications
Alex Alvarado
Information-theoretic metrics to analyze optical fiber communications systems with binary and nonbinary soft-decision FEC are reviewed. The numerical evaluation of these metrics in…
An Experimental Comparison of Coded Modulation Strategies for 100 Gbit/s Transceivers
Eric Sillekens, Alex Alvarado, Chigo Okonkwo +1
Coded modulation is a key technique to increase the spectral efficiency of coherent optical communication systems. Two popular strategies for coded modulation are turbo trellis-cod…
Nonlinear Frequency-Division Multiplexing in the Focusing Regime
Xianhe Yangzhang, Mansoor I. Yousefi, Alex Alvarado +2
Achievable rates of the nonlinear frequency-division multiplexing (NFDM) and wavelength-division multiplexing (WDM) subject to the same power and bandwidth constraints are computed…
Capacity Lower Bounds of the Noncentral Chi-Channel with Applications to Soliton Amplitude Modulation
Nikita A. Shevchenko, Stanislav A. Derevyanko, Jaroslaw E. Prilepsky +3
The channel law for amplitude-modulated solitons transmitted through a nonlinear optical fibre with ideal distributed amplification and a receiver based on the nonlinear Fourier tr…
On Probabilistic Shaping of Quadrature Amplitude Modulation for the Nonlinear Fiber Channel
Tobias Fehenberger, Alex Alvarado, Georg Böcherer +1
Different aspects of probabilistic shaping for a multi-span optical communication system are studied. First, a numerical analysis of the additive white Gaussian noise (AWGN) channe…
Asymptotic Comparison of ML and MAP Detectors for Multidimensional Constellations
Alex Alvarado, Erik Agrell, Fredrik Brännström
A classical problem in digital communications is to evaluate the symbol error probability (SEP) and bit error probability (BEP) of a multidimensional constellation over an additive…
Information Rates of Next-Generation Long-Haul Optical Fiber Systems Using Coded Modulation
Gabriele Liga, Alex Alvarado, Erik Agrell +1
A comprehensive study of the coded performance of long-haul spectrally-efficient WDM optical fiber transmission systems with different coded modulation decoding structures is prese…
Performance Prediction of Nonbinary Forward Error Correction in Optical Transmission Experiments
Laurent Schmalen, Alex Alvarado, Rafael Rios-Müller
In this paper, we compare different metrics to predict the error rate of optical systems based on nonbinary forward error correction (FEC). It is shown that the correct metric to p…