Adaptive Array Antenna Using On-Off and CMA Algorithms for Microwave RFID Readers

Tanawut TANTISOPHARAK  Akkarat BOONPOONGA  Chuwong PHONGCHAROENPANICH  Phaophak SIRISUK  Monai KRAIRIKSH  

Publication
IEICE TRANSACTIONS on Communications   Vol.E94-B   No.5   pp.1153-1160
Publication Date: 2011/05/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E94.B.1153
Print ISSN: 0916-8516
Type of Manuscript: INVITED PAPER (Special Section on Antenna and Propagation Technologies Contributing to Diversification of Wireless Technologies)
Category: 
Keyword: 
adaptive antenna,  on-off algorithm,  CMA algorithm,  microwave RFID readers,  

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Summary: 
This paper proposes an adaptive antenna using a combination of on-off and CMA algorithms. With the proposed technique, the on-off algorithm is first employed to search for a desired signal direction in which maximum received power is achieved. Then, interference is suppressed by performing CMA. Simulations are conducted according to the potential application of the proposed adaptive antenna. The simulation results show the SINR improvement implying that the proposed adaptive antenna can be applied to microwave RFID systems in order to resolve reader collision. Furthermore, the proposed adaptive antenna is implemented and then experimented. The experimental results verify that the proposed adaptive antenna can reduce interference resulting in the collision problem.