A software antenna configuration having robustness for strong interference signal that arrives suddenly—Utilizing the power inversion characteristics in the second eigenvector beam output

Abstract

AbstractAn environment is assumed in which a strong interference wave is suddenly incident. To produce an antenna robust to such an environment, a method is proposed in which an eigenvector beamspace adaptive array (EBAA) is formed by using the weight of the eigenvector for the first eigenvalue in the case of weak interference, but the weight of the eigenvector for the second eigenvalue in the case of strong interference. The performance of the interference suppression in the latter case (desired wave power ≪ interference wave power) is analyzed by numerical calculations and simulations. Also, this EBAA is superior in terms of configuration and performance to the well‐known power inversion adaptive array (PIAA). Based on the results, a software antenna configuration method for real‐time understanding of the propagation environment and adaptive switching of the algorithm is discussed. © 2003 Wiley Periodicals, Inc. Electron Comm Jpn Pt 1, 86(8): 20–28, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/ecja.10099