Investigation of multi-beam interference impact on state-of-polarization OCDMA optical networks

Naser G. Tarhuni*

*Corresponding author for this work

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

Abstract

Optical Code Division Multiple Access (OCDMA) is a promising technology for efficiently sharing resource of future optical networks among multiple nodes while managing the unavoidable Multiple Beam Interference (MBI). MBI arises when multiple users share the optical channel concurrently using signature codes. In this work, we investigate the impact of MBI on OCDMA network based on State of Polarization (SOP) encoding. The signature codes rotate the beam SOP for each node attached to the optical network. The considered signature codes are the asynchronous Gold code set and the Synchronous Hadamard code set. It is well known that conventional CDMA systems provide significant processing gain improvement in terms of the required Signal to Noise Ratio SNR, to achieve a given Bit Error Rate (BER) performance for single node transmission. However, the performance deteriorates as more active concurrent nodes transmit on shared channel. Interestingly, we show that the BER performance improves as number of active nodes increases when synchronous Hadamard code set is used as the signature waveform. To the best of our knowledge, this is a novel behavior in OCDMA systems. For instance, it is found that, by using intensive numerical simulations, a Hadamard code set of length 32 chips at a fixed SNR of -4 dB, the BER drops from 10-2 for a single user scenario to 10-6 for 32 concurrent users, i.e., a four order of magnitude improvement in BER performance.

Original languageEnglish
Title of host publication2019 International Symposium on Networks, Computers and Communications, ISNCC 2019
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781728112435
DOIs
Publication statusPublished - Jun 2019
Externally publishedYes
Event2019 International Symposium on Networks, Computers and Communications, ISNCC 2019 - Istanbul, Turkey
Duration: Jun 18 2019Jun 20 2019

Publication series

Name2019 International Symposium on Networks, Computers and Communications, ISNCC 2019

Conference

Conference2019 International Symposium on Networks, Computers and Communications, ISNCC 2019
Country/TerritoryTurkey
CityIstanbul
Period6/18/196/20/19

Keywords

  • Optical CDMA
  • Optical Polarization Shift Keying
  • Poincare sphere
  • Stoke space

ASJC Scopus subject areas

  • Instrumentation
  • Computer Networks and Communications
  • Hardware and Architecture
  • Signal Processing
  • Aerospace Engineering

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