Title :
Constrained maximum-likelihood detection for high-speed fiber-optic systems
Author :
Winters, Jack H. ; Kasturia, Sanjay
Author_Institution :
AT&T Bell Lab., Holmdel, NJ, USA
Abstract :
The authors present design techniques for constrained maximum-likelihood detection (MLD), a receiver electrical signal processing technique that provides near-optimum interference compensation, yet can be implemented at gigabit-per-second data rates. The technique determines the most likely transmitted bit given N1 previously detected bits and N2 received signal samples, using decision boundaries formed by (N2-1)-dimensional planes which are implemented with comparators. Two examples are used to illustrate the design procedure and the tradeoffs, showing the application to coherent and direct detection systems with polarization and chromatic dispersion, as well as to systems with nonlinearities. The results show that the performance of these techniques approaches that of MLD
Keywords :
maximum likelihood estimation; optical links; signal detection; chromatic dispersion; coherent detection; constrained maximum-likelihood detection; decision boundaries; direct detection; high-speed fiber-optic systems; near-optimum interference compensation; polarization; previously detected bits; received signal samples; signal processing; Chromatic dispersion; Circuits; Detectors; Interference constraints; Intersymbol interference; Maximum likelihood detection; Optical fiber dispersion; Optical fiber polarization; Optical receivers; Signal processing;
Conference_Titel :
Global Telecommunications Conference, 1991. GLOBECOM '91. 'Countdown to the New Millennium. Featuring a Mini-Theme on: Personal Communications Services
Conference_Location :
Phoenix, AZ
Print_ISBN :
0-87942-697-7
DOI :
10.1109/GLOCOM.1991.188631