Title :
Joint Effect of MLSE and Receiver Filters Optimization on Dispersion Robustness of IMDD, DPSK, DQPSK, and Duobinary Modulation
Author :
Bosco, G. ; Curri, V. ; Roffè, E. ; Poggiolini, P.
Author_Institution :
Politecnico di Torino, Turin
Abstract :
We analyze the effectiveness of a 32-state maximum-likelihood sequence-estimation (MLSE) receiver on chromatic dispersion robustness of optical transmission based on several binary modulation formats: intensity modulation direct detection, differential phase-shift keying, and duobinary line coding. Multilevel differential quadrature phase-shift keying modulation is also analyzed using a four-state 2-bit/symbol joint MLSE processor. For all modulation formats, receiver filters are optimized together with the use of the MLSE technique.
Keywords :
differential phase shift keying; encoding; intensity modulation; maximum likelihood sequence estimation; optical dispersion; optical filters; optical modulation; optical receivers; optimisation; quadrature phase shift keying; DPSK; DQPSK; MLSE; binary modulation formats; chromatic dispersion robustness; differential phase-shift keying; duobinary line coding; duobinary modulation; intensity modulation direct detection; maximum-likelihood sequence-estimation receiver; multilevel differential quadrature phase-shift keying modulation; optical transmission; receiver filter optimization; Chromatic dispersion; Differential quadrature phase shift keying; Intensity modulation; Maximum likelihood detection; Maximum likelihood estimation; Optical filters; Optical modulation; Optical receivers; Phase detection; Robustness; Chromatic dispersion (CD); maximum-likelihood sequence-estimation (MLSE); receiver filters;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2007.909673
