Andriyan Bayu Suksmono Akira Hirose Intelligent beamforming by using a complex-valued neural network. 139-147 2004 15 Journal of Intelligent and Fuzzy Systems 3-4 http://iospress.metapress.com/openurl.asp?genre=article&issn=1064-1246&volume=15&issue=3&spage=139 db/journals/jifs/jifs15.html#SuksmonoH04