PErformance Analysis of Optical Synchronous PPM/CDMA Systems with Interference Canceller under Number-State Light Field

Yoshinobu Gamachi, Tomoaki Ohtsuki, Hideyuki Uehara, Iwao Sasase

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

The performance of direct-detection optical synchronous code-division multiple-access (CDMA) systems using pulse position modulation (PPM) signaling (PPM/CDMA) with interference canceller is analyzed. In optical CDMA systems, it is known that the maximum number of simultaneous users in CDMA systems is limited by the maximum tolerable interference among users. If the receiver is able to estimate this interference and cancel or reduce its effect, the capacity of CDMA systems can be increased and the system performance can be improved. There are some ways to increase the system performance, that is, using PPM and interference canceller. However, the system using both PPM and interference canceller has not been analyzed. In this paper, the upper bound on the bit error probability of optical synchronous PPM/CDMA systems with interference canceller is derived, and the bit error probability of optical synchronous PPM/CDMA systems is evaluated under the assumption of number-state light field where the background noise is negligible. We compare the bit error probability of the optical synchronous PPM/CDMA systems with interference canceller to that of the optical synchronous PPM/CDMA systems without interference canceller and to those of optical synchronous OOK/CDMA systems with and without interference canceller. We show that optical synchronous PPM/CDMA systems with interference canceller have better bit error probability performance.

Original languageEnglish
Pages (from-to)915-921
Number of pages7
JournalIEICE Transactions on Communications
VolumeE79-B
Issue number7
Publication statusPublished - 1996 Jan 1

Keywords

  • Interference
  • Interference canceller
  • PPM
  • Synchronous cdma

ASJC Scopus subject areas

  • Software
  • Computer Networks and Communications
  • Electrical and Electronic Engineering

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