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

被引:4
作者
Tran, Quoc Tuan
Hara, Shinsuke
Nakaya, Yuuta
Ida, Ichirou
Oishi, Yasuyuki
机构
[1] Osaka Univ, Grad Sch Engn, Suita, Osaka 5650871, Japan
[2] Osaka City Univ, Grad Sch Engn, Osaka 5588585, Japan
[3] Fujitsu Ltd, YRP Res & Dev Ctr, Yokosuka, Kanagawa 2390847, Japan
关键词
MEMS; phase shifter; IEEE; 802.11a; mono-resolution; multiresolution; processing delay;
D O I
10.1093/ietcom/e89-b.9.2503
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
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 802.11a Wireless Local Area Network (WLAN) standard show that the proposed method has good interference suppression and gain enhancement capabilities in multipath fading channels.
引用
收藏
页码:2503 / 2513
页数:11
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