Experiments on coherent adaptive antenna array diversity for wideband CDMA mobile radio

S. Tanaka, A. Harada, M. Sawahashi, F. Adachi

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

3 Citations (Scopus)

Abstract

In wideband DS-CDMA (W-CDMA) in which mobile multimedia services up to 2 Mbps will be provided, adaptive antenna array diversity can be applied to reduce multiple access interference (MAI), especially in cases of severe interference from high rate users. A pilot symbol-assisted coherent adaptive antenna array diversity (PSA-CAAAD) receiver is implemented for W-CDMA mobile radio and its performance in a multi-path fading environment is evaluated both in laboratory and field experiments. The PSA-CAAAD receiver comprises an adaptive antenna array based on a minimum mean square error (MMSE) criterion and Rake combiner. It is demonstrated from the experimental results that the nulls could be precisely directed toward the interfering signals under a real multi-path propagation environment. Compared to antenna diversity with the same number of antennas, the PSA-CAAAD receiver can significantly reduce the interference from high bit-rate users. For a two-user case (one interfering-user with high transmit power), the required signal-to-interference plus background noise ratio (SIR) for obtaining the average BER of 10-3 is found to be reduced by about 4.5 dB with a 4-element PSA-CAAAD receiver compared to 4-branch antenna diversity in a real multi-path propagation environment.

Original languageEnglish
Title of host publicationIEEE VTS 50th Vehicular Technology Conference, VTC 1999-Fall
Pages243-248
Number of pages6
Publication statusPublished - 1999 Jan 1
Externally publishedYes
EventIEEE VTS 50th Vehicular Technology Conference, VTC 1999-Fall - Houston, TX, USA
Duration: 1999 Sep 191999 Sep 22

Publication series

NameIEEE VTS 50th Vehicular Technology Conference, VTC 1999-Fall
Volume1
ISSN (Print)0740-0551

Other

OtherIEEE VTS 50th Vehicular Technology Conference, VTC 1999-Fall
CityHouston, TX, USA
Period99/9/1999/9/22

ASJC Scopus subject areas

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

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