Person movement positioning with an L1 only GPS receiver

• Main Authors: Huang, Yi-Cheng, 黃弋丞
• Other Authors: Shih, Tian-Yuan
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/s97xs7

碩士 === 國立交通大學 === 土木工程系所 === 102 === GNSS (Global Navigation Satellite System) provides an efficient tool for the positioning of a person during movement. When the GNSS signal is blocked by obstacle such as buildings and trees, GNSS alone will not be able to determine the position. There are multi type sensors on a mobile phone unit currently available on market. Some of these sensors could be applied for positioning and not affected by the obstacles. This study integrates GNSS together with the motion sensors and the performance for positioning during movement is investigated. There are two subjects in this study. The performance of different GNSS solution schemes is examined first in terms of accuracy and reliability. Then, the improvement of integration is evaluated. The GNSS solution schemes evaluated include the rigorous post processing scheme which serves as a reference, and several real time kinematic positioning schemes such as network RTK, and real time code differential. The experiments are reported in two parts, without and with motion sensors. Several models of mobile devices are applied in the experiments for understanding the performance difference between models. The experiments show that the uncertainty of positioning is reduced when the motion sensor is applied. When the GNSS device on the mobile devices are used, the standard deviation of positioning error could be reduced by 10m. When the surveying type GNSS receiver is used, the standard deviation reduced between 0.01m and 0.05m in different cases.