An Adaptive Beamforming Method for Phased Array Antenna with MEMS Phase Shifters
| Autor: | Ichirou Ida, Shinsuke Hara, Quoc Tuan Tran, Yuuta Nakaya, Yasuyuki Oishi |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
Beamforming
Signal processing Phased-array optics Computer Networks and Communications Phased array business.industry Computer science ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS Interference (wave propagation) IEEE 802.11a-1999 law.invention law Electronic engineering Wi-Fi Electrical and Electronic Engineering Telecommunications business Phase shift module Adaptive beamformer Software Multipath propagation Computer Science::Information Theory Communication channel |
| Zdroj: | IEICE Transactions on Communications. :2503-2513 |
| ISSN: | 1745-1345 0916-8516 |
| DOI: | 10.1093/ietcom/e89-b.9.2503 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|