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Paper Abstract and Keywords
Presentation 2007-05-17 15:20
Adaptive beamforming with Multiport Parasitic Array Radiator Antenna
Masayuki Morishita (Niigata Univ.), Chen Sun, Makoto Taromaru (ATR), Hiroyoshi Yamada (Niigata Univ./ATR), Takashi Ohira (ATR) AP2007-18
Abstract (in Japanese) (See Japanese page) 
(in English) A digital beamforming (DBF) array performs adaptive beamforming by digital signal processing. However, the circuit scale, number of RF channels and power consumption increase with the number of array elements. In this paper, we propose a system of adaptive beamforming with multiport parasitic array radiator (MuPAR) antenna. The MuPAR antenna consists of multiple active elements and parasitic elements. The parasitic elements are loaded with variable reactors. Compared with a DBF array having the same number of elements, the MuPAR antenna structure is composed of less RF channels and A/D converters, thus has less power consumption. The goal of this paper is to examine the performance of adaptive beamforming with the MuPAR antenna. The MuPAR antenna is the combination of a DBF and an analog beamforming algorithms. We apply the steepest gradient algorithm (SGA) to optimize the reactances, and apply RLS algorithm to perform DBF at the active elements. We compare adaptive beamforming performance with DBF array.
Keyword (in Japanese) (See Japanese page) 
(in English) MuPAR Antenna / Digital Beamforming / Analog Beamforming / DBF array / Parasitic element / / /  
Reference Info. IEICE Tech. Rep., vol. 107, no. 35, AP2007-18, pp. 31-35, May 2007.
Paper # AP2007-18 
Date of Issue 2007-05-10 (AP) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
and
reproduction		 All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF AP2007-18

Conference Information
Committee AP  
Conference Date 2007-05-17 - 2007-05-18 
Place (in Japanese) (See Japanese page) 
Place (in English) Kochi Univ. of Tech. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) etc. 
Paper Information
Registration To AP 
Conference Code 2007-05-AP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Adaptive beamforming with Multiport Parasitic Array Radiator Antenna 
Sub Title (in English)  
Keyword(1) MuPAR Antenna  
Keyword(2) Digital Beamforming  
Keyword(3) Analog Beamforming  
Keyword(4) DBF array  
Keyword(5) Parasitic element  
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Keyword(7)  
Keyword(8)  
1st Author's Name Masayuki Morishita  
1st Author's Affiliation Niigata University (Niigata Univ.)
2nd Author's Name Chen Sun  
2nd Author's Affiliation Advanced Telecommunications Research Institute International (ATR)
3rd Author's Name Makoto Taromaru  
3rd Author's Affiliation Advanced Telecommunications Research Institute International (ATR)
4th Author's Name Hiroyoshi Yamada  
4th Author's Affiliation Niigata University/Advanced Telecommunications Research Institute International (Niigata Univ./ATR)
5th Author's Name Takashi Ohira  
5th Author's Affiliation Advanced Telecommunications Research Institute International (ATR)
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Speaker Author-1 
Date Time 2007-05-17 15:20:00 
Presentation Time 25 minutes 
Registration for AP 
Paper # AP2007-18 
Volume (vol) vol.107 
Number (no) no.35 
Page pp.31-35 
#Pages 5 
Date of Issue 2007-05-10 (AP) 

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