Journal
JOURNAL OF LIGHTWAVE TECHNOLOGY
Volume 40, Issue 1, Pages 93-100Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JLT.2021.3120671
Keywords
Solitons; Estimation; Eigenvalues and eigenfunctions; Timing; Optical solitons; Mathematical models; Optical imaging; Soliton; nonlinear Fourier transform; correlation; multistage estimation; piecewise-linear minimum mean-squared-error estimation; complexity; achievable information rates
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A multi-stage signal estimation scheme is proposed for phase-and-amplitude modulated soliton communication systems, providing significant mean-squared-error reduction and spectral-efficiency improvements. The low-complexity version of the scheme is studied through numerical simulations under distributed Raman amplification strategy, showing an increase in achievable information rate for pulse bandwidths of 30 GHz, 40 GHz, and 50 GHz.
A multistage signal estimation scheme is proposed for phase-and-amplitude modulated soliton communication systems. The estimator provides a significant mean-squared-error reduction in soliton amplitude estimation, which, in conjunction with detection of encoded phase information, results in spectral-efficiency improvements. A low-complexity version of the multistage estimation scheme is also proposed, whose performance is studied via numerical simulations under the distributed Raman amplification strategy. The achievable information rate is increased by about 1 bit/symbol for pulse bandwidth of 30 GHz, 40 GHz, and 50 GHz.
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