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논문 기본 정보

자료유형
학술대회자료
저자정보
Jin Ik Kim (Seoul National University) Jang Gyu Lee (Seoul National University) Chan Gook Park (Seoul National University)
저널정보
제어로봇시스템학회 제어로봇시스템학회 국제학술대회 논문집 ICCAS 2008
발행연도
2008.10
수록면
1,601 - 1,605 (5page)

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초록· 키워드

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In this paper, TDOA(Time Difference of Arrival) measurements from pilot signals of a wireless communication network is proposed to solve the navigation problem in the case that under the environments that each BS(base station) have NLOS((Non-Line-of-Sight) error. TDOA measurements are known to have poor accuracy due to technical limitations of a communication system and propagation environments. The major error source of TDOA is the NLOS. NLOS propagation error occurs when a direct LOS(Line-of-Sight) path between an MS(Mobile Station) and a BS(Base Station) is blocked by some obstacles. To mitigate the NLOS error in a cellular network, TDOA error modeling is used for each BS channel. And then, remove NLOS error from each measurement. Some simulations and real tests are conducted to evaluate the performance of the proposed methods. Real experiments are conducted at the city center of Seoul. A commercial GPS cellular phone and a QXDM program are used. And then, TDOA measurements are measured. Test results show that the proposed methods continuously provide subscribers a reasonably accurate location under the NLOS environments.

목차

Abstract
1. INTRODUCTION
2. BASIC OF WIRELESS LOCATION
3. NON LINE OF SIGHT ERROR
4. TDOA ERROR MODELING
5. EXPERIMENTS AND RESULT
6. CONCLUSTIONS
ACKNOWLEDGEMENT
REFERENCES

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