Adaptive Beamforming of ESPAR Antenna Based on Steepest Gradient Algorithm

• CHENG Jun

  the ATR Adaptive Communication Research Laboratories

• KAMIYA Yukihiro

  the ATR Adaptive Communication Research Laboratories

• OHIRA Takashi

  the ATR Adaptive Communication Research Laboratories

Abstract

Conventional adaptive array antenna processing must access signals on all of the array antenna elements. However, because the low-cost electronically steerable passive array radiator (ESPAR) antenna only has a single-port output, all of the signals on the antenna elements cannot be observed. In this paper, a technique for adaptively controlling the loaded reactances on the passive radiators, thus forming both beam and nulls, is presented for the ESPAR antenna. The adaptive algorithmis based on the steepest gradient theory, where the reactances are sequentially perturbed to determine the gradient vector. Simulations show that the ESPAR antenna can be adaptive. The statistical performance of the output SIR of the ESPAR antenna is also given.

Journal

• IEICE Trans. Commun., B

  IEICE Trans. Commun., B 84 (7), 1790-1800, 2001-07-01

  The Institute of Electronics, Information and Communication Engineers

Keywords

• gradient algorithm
• adaptive beamforming
• mobile user terminal
• interference reduction
• low complexity

Details

• CRID: 1570572702511694592
• NII Article ID: 110003219138
• NII Book ID: AA10826261
• ISSN: 09168516
• Text Lang: en
• Data Source:
  • CiNii Articles