Nonlinear power control for asynchronous fiber-optic CDMA networks

Naser G. Tarhuni, Mohamed S. Elmusratit, Timo O. Korhonen

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)


In this paper we investigate the effect of photodetector nonlinearity on the optimum transmit power setting in an asynchronous optical CDMA network. Network impairments as well as thermal noise, shot noise and multiple access interference (MAI) are taken into account. Unlike in traditional systems, the optical detector generated shot noise adds a new self-interference normally not considered previously as part of the MAI. We formulate a centralized power control algorithm and propose novel, iterative, Nonlinear Optical Power Control (NOPC) algorithm. Furthermore, convergence properties of the proposed algorithm are studied. We prove that the iterative NOPC converges to a unique point. Solution feasibility is then formulated in terms of the employed network parameters, MAI and target SIR. Finally, simulation results are given illustrating the theoretical analysis.

Original languageEnglish
Title of host publication2006 IEEE International Conference on Communications, ICC 2006
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages5
ISBN (Print)1424403553, 9781424403554
Publication statusPublished - 2006
Externally publishedYes
Event2006 IEEE International Conference on Communications, ICC 2006 - Istanbul, Turkey
Duration: Jul 11 2006Jul 15 2006

Publication series

NameIEEE International Conference on Communications
ISSN (Print)0536-1486


Other2006 IEEE International Conference on Communications, ICC 2006


  • Optical CDMA
  • Optical power control
  • Prime codes

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electrical and Electronic Engineering


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