BROWSE
Detail
Conference Paper
Direct Estimation of Multipath in a Deep Urban Area using Multi-GNSS Carrier Phase Variation and Previous Position
Cited - time in 
Share 
Share
- Authors
- Yongjun Lee, Byungwoon Park, Yoola Hwang, Byoung-Sun Lee, Jaeyoung Ahn
- Issue Date
- 2019-04
- Citation
- ION Pacific PNT 2019, pp.1-9
- Language
- English
- Type
- Conference Paper
- Abstract
- Accurate positioning in unban canyon has been a major challenge in the GNSS field for a long time. As the use of satellite navigation system of smartphones and car navigation systems become more usual in populated area and cities, the need for improving the GNSS position accuracy is continuously increasing. Multi-path and NLOS(Non Line-Of-Sight) signal are the major cause of the poor accuracy in urban area. Recently various studies such as multi-constellation GNSS, NLOS measurement rejection, Ray tracing, Shadow matching and weighting matrix based on the signal strength have been introduced to reduce multipath effect. This paper introduces efficient and practical methods to estimate and eliminate the multi-path for both LOS and NLOS signal, and then shows this technique is very effectively utilized for automobiles in a deep urban city like Teheranro, Gangnam-gu, Seoul.
- KSP Keywords
- Accurate positioning, Car navigation, Carrier phase, Direct Estimation, Line-Of-Sight(LOS), Long Time, Multi-GNSS, Non Line-of-sight(NLOS), Ray tracing, Satellite navigation system, Shadow Matching