Coherent multicarrier/DS-CDMA and MC-CDMA for broadband packet wireless access

Sadayuki Abeta, Hiroyuki Atarashi, Mamoru Sawahashi, Fumiyuki Adachi

Research output: Contribution to journalConference article

29 Citations (Scopus)

Abstract

This paper compares the packet error rate (PER) performance levels of 3 access schemes, i.e., single-carrier (SC)/DS-CDMA, multi-carrier (MC)/DS-CDMA, and MC-CDMA assuming an over 100-MHz bandwidth for broadband packet wireless access. In a broadband propagation channel, severe multipath interference degrades the accuracy of path search and channel estimation for coherent detection. Computer simulation results show that, in the reverse link, SC/DS-CDMA achieves better performance than MC/DS-CDMA because the pilot signal power in one sub-carrier for path search and channel estimation decreases as the number of sub-carrier increases. The superiority of MC-CDMA to MC(SC)/DS-CDMA is demonstrated, and the results show that, in the forward link, frequency Rake diversity with MC-CDMA is more effective than time Rake diversity with DS-CDMA in a broadband multipath fading channel due to a large amount of multipath interference.

Original languageEnglish
Pages (from-to)1918-1922
Number of pages5
JournalIEEE Vehicular Technology Conference
Volume3
Publication statusPublished - 2000 Jan 1
Externally publishedYes
EventVTC2000: 51st Vehicular Technology Conference 'Shaping History Through Mobile Technologies' - Tokyo, Jpn
Duration: 2000 May 152000 May 18

ASJC Scopus subject areas

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

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