Title :
Joint Precoding for Optically Amplified Fiber-Optic Systems
Author :
Modi, Kirtan N. ; Brandt-Pearce, Maite
Author_Institution :
Charles L. Brown Dept. of Electr. & Comput. Eng., Virginia Univ., Charlottesville, VA
Abstract :
Optically amplified regional and long-haul fiber optic networks employing wavelength division multiplexing (WDM) or code division multiple access (CDMA) are typically performance limited by cross-talk among different channels or users. Receiver based signal processing techniques for minimizing the resulting interference effects have been investigated in the past. In optical channels the receiver (the photo-detector) is effectively a square-law device. Combined with optical pre-amplification, this results in non-Gaussian, signal dependent noise and makes interference cancellation at the receiver difficult. In this paper we consider the design of a fiber-optic system as a whole multichannel system, using joint transmit and receive processing to minimize the performance degradation resulting from interference. Our results indicate that depending on the cross-correlation among channels or users the proposed techniques may outperform receiver based multiuser detection techniques.
Keywords :
interference suppression; optical correlation; optical crosstalk; optical fibre amplifiers; optical fibre networks; precoding; wavelength division multiplexing; CDMA; WDM; code division multiple access; cross-correlation; cross-talk; interference cancellation; joint transmit-receive processing; long-haul fiber optic network; non-Gaussian-signal dependent noise; optical channel; optically amplified fiber-optic system; precoding; square-law device; wavelength division multiplexing; Interference; Multiaccess communication; Optical crosstalk; Optical fiber networks; Optical fibers; Optical noise; Optical receivers; Optical signal processing; Stimulated emission; Wavelength division multiplexing;
Conference_Titel :
Information Sciences and Systems, 2006 40th Annual Conference on
Conference_Location :
Princeton, NJ
Print_ISBN :
1-4244-0349-9
Electronic_ISBN :
1-4244-0350-2
DOI :
10.1109/CISS.2006.286405