研究目的
Investigating the use of an electronically steerable parasitic array radiator (ESPAR) antenna for single-anchor indoor localization to improve accuracy over existing methods.
研究成果
The proposed single-anchor indoor localization concept using an ESPAR antenna and a simple adaptation of the ?ngerprinting algorithm achieves better accuracy than similar approaches based on switched-beam antennas, with an average localization error of 1.69 m.
研究不足
The study is limited by the environmental conditions of the indoor setting and the specific configurations of the ESPAR antenna used. Further optimization of the antenna design and algorithm could enhance performance.
1：Experimental Design and Method Selection:
The study employs a simple ?ngerprinting algorithm adapted for use with directional main beam and narrow minimum radiation patterns of an ESPAR antenna.
2：Sample Selection and Data Sources:
Measurements were conducted in a real-world scenario (a computer laboratory) using a mobile terminal and a base station equipped with the ESPAR antenna.
3：List of Experimental Equipment and Materials:
The ESPAR antenna prototype,
4：4-GHz IEEE 4 compliant CC2430-based modules, and a Titanis 4-GHz Swivel SMA antenna were used. Experimental Procedures and Operational Workflow:
The ESPAR antenna scanned 360 degrees around the base station, recording signal strength from the mobile terminal for each configuration.
5：Data Analysis Methods:
A ?ngerprinting algorithm and K-Nearest Neighbor (KNN) regression algorithm were used to estimate the position of the mobile terminal.
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