Performance of adaptive array antennas with multicarrier DS/CDMA in a mobile fading environment

Yukitoshi Sanada, Michael Padilla, Kiyomichi Araki

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

For usage in fading environments, the idea of utilizing radio signal processing with software programmable devices promises greater flexibility and functionality. However, to realize these benefits very high performance DPSs and AD converters are required, especially for adaptive antennas with CDMA. One potential method of reducing the implementation complexity is to employ multicarrier (MC) modulation as it allows parallel signal processing in addition to its benefits in combating fading and ISI effects. This paper proposes a system utilizing MC DS/CDMA and a recursive adaptive array antenna processing algorithm for estimating the array response vector (array manifold) and hence the optimal weights. In order to evaluate this system performance results obtained through computer simulations are presented. The proposed MC system ; improves the accuracy of the direction-of-arrival (DOA) estimation of the signal by 2 degrees as compared with a single carrier system. It is also shown that the proposed adaptive array antenna algorithm for MC DS/CDMA reduces the number of iterations of the power method significantly and allows parallel processing of the adaptive algorithm.

Original languageEnglish
Pages (from-to)1392-1400
Number of pages9
JournalIEICE Transactions on Communications
VolumeE81-B
Issue number7
Publication statusPublished - 1998 Jan 1
Externally publishedYes

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Keywords

  • Adaptive antennas
  • DS/CDMA
  • Multicarrier
  • Software radio

ASJC Scopus subject areas

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

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