Fast two-step beam tracking algorithm of coherent adaptive antenna array diversity receiver in W-CDMA reverse link

Taisuke Ihara, Shinya Tanaka, Mamoru Sawahashi, Fumiyuki Adachi

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

In wideband direct sequence code division multiple access (W-CDMA), employing an adaptive antenna array is a very promising technique to reduce severe multiple access interference (MAI) especially from high rate users. This paper proposes a fast and accurate two-step beam tracking algorithm implemented in a pilot symbol-assisted coherent adaptive antenna array diversity (CAAAD) receiver and evaluates its performance both by computer simulation and laboratory experiments. In the proposed scheme, the receiver antenna weights are updated by using both the signal-to-interference power ratio (SIR) measurements employing multiple sets of antenna weights (MSAW) and an adaptive algorithm based on the minimum mean square error (MMSE) criterion, in which other sets except for a original set of antenna weights are simply generated by a original set. Computer simulation results show that antenna weights of a four-antenna CAAAD receiver using the proposed beam tracking algorithm tracks changes in the direction of arrival (DOA) of the desired user at up to 34.3 degrees/sec, which corresponds to 215 km/h at 100 m from a base station. We also confirm based on the experiments in a radio anechoic room that the generated antenna weights track the DOA changes up to 12.3 degrees/sec.

Original languageEnglish
Pages (from-to)1835-1848
Number of pages14
JournalIEICE Transactions on Communications
VolumeE84-B
Issue number7
Publication statusPublished - 2001 Jul

Keywords

  • Adaptive antenna array
  • Beam tracking
  • DS-CDMA
  • Mobile radio communication

ASJC Scopus subject areas

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

Fingerprint Dive into the research topics of 'Fast two-step beam tracking algorithm of coherent adaptive antenna array diversity receiver in W-CDMA reverse link'. Together they form a unique fingerprint.

Cite this