Time diversity CDMA scheme employing orthogonal modulation for time varying channels

Shuji Kubota, Shuzo Kato, Kamilo Feher

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

Abstract

In order to increase the channel capacity of CDMA (Code Division Multiple Access) mobile and personal communication systems, a new time diversity CDMA scheme that employs orthogonal modulation is proposed. The time diversity CDMA scheme with orthogonal modulation reduces the required Eb/(No + Io) by 5dB at Pe = 10-2 in Rayleigh fading environments with fDT (the product of Doppler frequency and one symbol duration) values ranging from 0.002 to 0.02. This improvement in required Eb/(No + Io) significantly increases the channel capacity of CDMA communication systems that have time varying channels. In addition, the computer simulation results show that the required time delay values of the time diversity scheme are reasonably short (20-100 symbols for 10kbps transmission) for fDT values ranging from 0.002 to 0.02.

Original languageEnglish
Title of host publicationIEEE Vehicular Technology Conference
PublisherPubl by IEEE
Pages444-447
Number of pages4
ISBN (Print)078031266X
Publication statusPublished - 1993 Jan 1
EventProceedings of the 43rd IEEE Vehicular Technology Conference - Secaucus, NJ, USA
Duration: 1993 May 181993 May 20

Publication series

NameIEEE Vehicular Technology Conference
ISSN (Print)0740-0551

Other

OtherProceedings of the 43rd IEEE Vehicular Technology Conference
CitySecaucus, NJ, USA
Period93/5/1893/5/20

ASJC Scopus subject areas

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics

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  • Cite this

    Kubota, S., Kato, S., & Feher, K. (1993). Time diversity CDMA scheme employing orthogonal modulation for time varying channels. In IEEE Vehicular Technology Conference (pp. 444-447). (IEEE Vehicular Technology Conference). Publ by IEEE.