Development of an adaptive array based on subband signal processing

Yukihiro Kamiya, Satoshi Denno, Yoshihiko Mizuguchi, Masaaki Katayama, Akira Ogawa, Yoshio Karasawa

Research output: Contribution to journalArticle

Abstract

Adaptive arrays for spatiotemporal signal processing are expected to be effective multipath measures in future high-speed mobile communications systems. However, a problem is the tremendous computational load in a hardware implementation because the number of weights that are adaptively controlled becomes extremely large. Therefore, the key to its practical use is to reduce the computational load. In this paper, an adaptive array for processing subband signals that can substantially reduce the computational load was implemented in hardware by using a commercially available digital signal processor (DSP). First, we illustrated the scale of the hardware by the number of DSPs needed in each unit that performed the required signal processing. Next, we built a simple multipath environment of two waves in an anechoic chamber and performed experiments to demonstrate the basic performance and verified that performance nearly equal to the theoretical values was obtained.

Original languageEnglish
Pages (from-to)19-30
Number of pages12
JournalElectronics and Communications in Japan, Part III: Fundamental Electronic Science (English translation of Denshi Tsushin Gakkai Ronbunshi)
Volume85
Issue number10
DOIs
Publication statusPublished - May 23 2002
Externally publishedYes

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Keywords

  • Adaptive array
  • Digital beam-forming (DBF) antenna
  • Multipath fading
  • Subband signal processing

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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