목차

1. 서 론 ·····················································································································1
1.1 실내 위치 측위 시스템 ·························································································1
1.1.1 실내 위치 기반 서비스 ·····················································································1
1.1.2 실내 위치 모델링 ·····························································································2
1.1.3 실내 측위 기술 ································································································4
1.2 Wi-Fi 고 정밀 측위 기술의 개념과 필요성 ······························································7
1.3 제안하는 Wi-Fi 고 정밀 측위 시스템의 전체 구조 ···················································9
2. 관련연구 ·················································································································11
2.1 근거리 무선 기술을 이용한 측위기술 ······································································11
2.1.1 실내 측위에 사용되는 무선통신기술 ···································································11
2.1.2 기존 실내 측위 기술 ························································································18
2.2 IEEE 802.11ax 표준 ····························································································28
2.2.1 1024QAM ·······································································································30
2.2.2 OFDMA ··········································································································32
2.2.3 IEEE 802.11mc의 FTM ····················································································35
3. 제안하는 Wi-Fi 고 정밀 측위 시스템 ·········································································38
3.1 측위 시스템 설계 목표 ··························································································38
3.2 제안 시스템의 구성 및 동작 ··················································································39
3.3 Wi-Fi 고 정밀 측위를 위한 요소 기술 ····································································40
3.3.1 IEEE 802.11az의 OFDMA를 이용한 다중접속·······················································40
3.3.2 QoS지원을 위한 EDCA설계 ···············································································45
3.3.3 필터 설계 ········································································································49
4. 시스템 구현 ·············································································································51
5. 성능평가 ··················································································································57
5.1 실험환경 및 성능평가 ·····························································································57
5.1.1 실험 환경 ···········································································································57
5.2 성능평가 ···············································································································58
5.2.1 거리 측정 평가 ···································································································59
5.2.2 위치 즉정 평가 ···································································································60
5.2.3 전송속도 평가 ·····································································································65
5.2.1 QoS 성능평가 ·····································································································67
6. 결론 ·························································································································69
7. 참고 문헌 ·················································································································72
Abstract ······················································································································78