IEEE 802.15.4a UWB 기반 실내 위치측정 시스템의 설계 및 구현

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Nowadays, many people spend most of their life indoor. Thus, positioning and tracking of target at indoor environment have become very important applications. The conventional positioning systems such as global positioning system (GPS) have limited performance at the indoor environment because GPS signal is weakened. For indoor positioning, there are many possible approaches such as WiFi, BLE, Infrared Ray, UWB, and so on.
This thesis discusses a design and implementation of ultra wideband (UWB) positioning system based on IEEE 802.15.4a standard. This IEEE 802.15.4 UWB positioning system uses time based positioning scheme called time of arrival (TOA) to measure the distance from a target tag. In order to measure TOA, a mobile tag performs the two way ranging (TWR) with adjacent 3 fixed anchors. After that, the position of tag is calculated by trilateration using distance between tag and each anchor. This thesis introduces a practical TWR algorithm and trilateration method for indoor positioning system. Also, the thesis shows the result of performance evaluation of the proposed UWB based positioning system. The experimental results validate that the proposed IEEE 802.15.4a UWB based positioning system measures the moving tag’s position with tolerable error of 1m.
Alternative Title
Design and Implementation of IEEE 802.15.4a UWB based Indoor Positioning System
Alternative Author(s)
Kim, Dae-Ho
조선대학교 대학원
일반대학원 정보통신공학과
Awarded Date
Table Of Contents
Ⅰ. 서 론 1
A. 연구 배경 및 목적 1
B. 연구 목표 2
C. 논문 구성 2
II. 실내 위치측정 기술 3
A. 신호강도 기반 위치측정 3
B. 시간 기반 위치측정 4
1. Angle of arrival (AOA) 4
2. Time difference of arrival (TDOA) 4
3. Time of arrival (TOA) 5
Ⅲ. IEEE 802.15.4a UWB 위치측정 시스템 6
A. Two way ranging (TWR) 7
1. TWR 7
2. Symmetrical double-sided two way ranging (SDS-TWR) 8
3. 태그 주도형 TWR 9
4. 안테나 지연 보정 11
B. 삼변측량 13
1. 삼변측량 13
2. 개선된 삼변측량 14
C. IEEE 802.15.4a UWB 태그 16
1. 하드웨어 구성 16
2. 위치측정용 MAC 프로토콜 18
Ⅳ. 성능 평가 및 결과 분석 19
A. 실험 시나리오 19
1. 고정 대상 위치측정 20
2. 이동 대상 위치측정 23
B. 측정 결과 26
1. 고정 대상 위치측정 26
2. 이동 대상 위치측정 35
Ⅴ. 결론 및 향후 연구과제 43
참고문헌 45
조선대학교 대학원
김대호. (2016). IEEE 802.15.4a UWB 기반 실내 위치측정 시스템의 설계 및 구현.
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General Graduate School > 3. Theses(Master)
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