Titre du document / Document title

An adaptive beamforming method for phased array antenna with MEMS phase shifters

Auteur(s) / Author(s)

TRAN Quoc Tuan ⁽¹⁾ ; HARA Shinsuke ⁽²⁾ ; NAKAYA Yuuta ⁽³⁾ ; IDA Ichirou ⁽³⁾ ; OISHI Yasuyuki ⁽³⁾ ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

⁽¹⁾ Graduate School of Engineering, Osaka University, Suita-shi, 565-0871, JAPON
⁽²⁾ Graduate School of Engineering, Osaka City University, Osaka-shi, 558-8585, JAPON
⁽³⁾ YRP Research & Development Center, Fujitsu Limited, Yokosuka-shi, 239-0847, JAPON

Résumé / Abstract

Adaptive array antennas, which control their own patterns by means of feed-back or feed-forward control, are effective tools for gain enhancement and interference suppression. However, when applying them to mobile terminals, the problems of hardware complexity and power consumption need to be taken into consideration. One solution is the use of analog device-based adaptive array antennas, such as Reactively Steered Adaptive Array (RESAA) antennas and phased array antennas, which have the attractive characteristics of low cost and power consumption. In this paper, we propose an adaptive beamforming method based on a one-dimension search algorithm for phased array antennas with Micro Electro Mechanical Systems (MEMS) phase shifters, taking into consideration their slow operating speed due to mechanical structure of the devices. Furthermore, a smoothing processing is introduced to prevent the effect of noise and a multi-resolution alogrithm is proposed to help the system form beams more quickly and stably. Numerical results based on the IEEE 802.11 a Wireless Local Area Network (WLAN) standard show that the proposed method has good interference suppression and gain enhancement capabilities in multipath fading channels.

Revue / Journal Title

IEICE transactions on communications   ISSN 0916-8516 

Source / Source

2006, vol. 89, n^o9, pp. 2503-2513 [11 page(s) (article)] (15 ref.)

Langue / Language

Anglais

Editeur / Publisher

Oxford University Press, Oxford, ROYAUME-UNI  (1992) (Revue)

Mots-clés anglais / English Keywords

Signal processing ; Wireless telecommunication ; Noise reduction ; Delay time ; Fading channels ; Multipath channels ; Wireless LAN ; Numerical simulation ; Multiresolution analysis ; Search algorithm ; Cost lowering ; Power consumption ; Interference suppression ; Feedforward ; Adaptive antenna arrays ; Phase shifter ; Microelectromechanical device ; Phased array antenna ; Beam forming ; Adaptive method ;

Mots-clés français / French Keywords

Traitement signal ; Télécommunication sans fil ; Réduction bruit ; Temps retard ; Canal évanouissement ; Canal trajet multiple ; Réseau local sans fil ; Simulation numérique ; Analyse multirésolution ; Algorithme recherche ; Diminution coût ; Consommation énergie électrique ; Suppression interférence ; Boucle anticipation ; Antenne réseau adaptative ; Déphaseur ; Dispositif microélectromécanique ; Antenne réseau équiphase ; Formation voie ; Méthode adaptative ;

Mots-clés espagnols / Spanish Keywords

Procesamiento señal ; Telecomunicación sin hilo ; Reducción ruido ; Tiempo retardo ; Simulación numérica ; Análisis multiresolución ; Algoritmo búsqueda ; Reducción costes ; Ciclo anticipación ; Desfasador ; Dispositivo microelectromecánico ; Antena red equifase ; Formación haz ; Método adaptativo ;

Mots-clés d'auteur / Author Keywords

MEMS ; phase shifter ; IEEE 802.11a ; mono-resolution ; multi- resolution ; processing delay ;

Localisation / Location

INIST-CNRS, Cote INIST : 7315 E1, 35400015225841.0230