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 fingerprinting algorithm achieves better accuracy than similar approaches based on switched-beam antennas. The method is cost-effective and suitable for large indoor spaces.
研究不足
The study is limited to indoor environments and relies on the specific design of the ESPAR antenna. The accuracy may vary in different settings or with different antenna configurations.
1：Experimental Design and Method Selection:
The study involves designing an ESPAR antenna with specific radiation patterns for indoor localization and adapting a fingerprinting algorithm to work with these patterns.
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 was designed with 12 passive elements and one active monopole, controlled by SPST switches.
4：Experimental Procedures and Operational Workflow:
The antenna's radiation patterns were measured for directional main beam and narrow minimum configurations, and RSS values were recorded for localization.
5：Data Analysis Methods:
A fingerprinting algorithm using Euclidean distance function and K-Nearest Neighbor (KNN) regression was applied to estimate the mobile terminal's position.
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