A symbol decision scheme to mitigate effects of scintillations and MAIs in optical atmospheric PPM-CDMA systems

Koki Ohba, Tatsuma Hirano, Takaya Miyazawa, Iwao Sasase

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

9 Citations (Scopus)

Abstract

In optical atmospheric (OA) pulse position modulation (PPM) code division multiple access (CDMA) systems, the conventional scheme which applies the maximum-value detection has a serious problem that the multiple access Interferences (MAIs) become large due to scintillations. In this paper, to mitigate both effects of scintillations and MAIs, we propose a symbol decision scheme by using the comparing detection. In our proposed scheme, the minimum output In all weighted positions Is detected In each PPM slot. Then, the maximum-value out of the minimum outputs Is detected, and, the symbol corresponding to the PPM slot In which the output has the maximum-value Is decided. Since the received symbol Is correctly decided as long as there Is at least one weighted position without MAIs In other PPM slots, the proposed scheme can mitigate both effects of MAIs and scintillations. We show that the proposed scheme can Improve the bit error rate performance.

Original languageEnglish
Title of host publicationGLOBECOM'05
Subtitle of host publicationIEEE Global Telecommunications Conference, 2005
Pages1999-2003
Number of pages5
DOIs
Publication statusPublished - 2005 Dec 1
EventGLOBECOM'05: IEEE Global Telecommunications Conference, 2005 - St. Louis, MO, United States
Duration: 2005 Nov 282005 Dec 2

Publication series

NameGLOBECOM - IEEE Global Telecommunications Conference
Volume4

Other

OtherGLOBECOM'05: IEEE Global Telecommunications Conference, 2005
CountryUnited States
CitySt. Louis, MO
Period05/11/2805/12/2

ASJC Scopus subject areas

  • Engineering(all)

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    Ohba, K., Hirano, T., Miyazawa, T., & Sasase, I. (2005). A symbol decision scheme to mitigate effects of scintillations and MAIs in optical atmospheric PPM-CDMA systems. In GLOBECOM'05: IEEE Global Telecommunications Conference, 2005 (pp. 1999-2003). [1578016] (GLOBECOM - IEEE Global Telecommunications Conference; Vol. 4). https://doi.org/10.1109/GLOCOM.2005.1578016