Group Positioning Technology Using GPS with Auxiliary Radio Signal Strength

• Main Authors: Po-Min Lin, 林柏旻
• Other Authors: Shiann-Tsong Sheu
• Format: Others
• Language: en_US
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/69535383730731673253

碩士 === 國立中央大學 === 通訊工程研究所 === 99 === As the rapid development in wireless technology, Location-Based Service (LBS) is widely used in the various areas; civil navigation, public safety, and military. It provides many mobile services; neighbor information searching, pedestrian navigation, personal security, personnel and fleet management, location status of friends, and regional advertising. Navigation is one of the most common applications. However, any kind of LBS is relying on to identify the user’s location. When developing the indoor or outdoor positioning algorithm, the accuracy is the primary concern. Several useful positioning algorithms have been published for performing LBS. In open sky environments, Global Navigation Satellite System (GNSS) is the well-known navigation system. GNSS is the generic name given to the satellite-based navigation systems including global positioning system (GPS), global navigation satellite system (GLONASS), and Galileo. When using GPS without extra assistance, such as A-GPS or indoor GPS beacon, there are some existing drawbacks; for example, the precision will be degraded in the Non-Line-of-Sight (NLoS) environment such as dense metropolis, and the location will not be able to perform in the weak signal environment such as indoor. In order to solve the problem and improve the positioning accuracy, the mobile devices use Bluetooth to exchange GPS iv position information (such as: latitude and longitude) and use signal strength of Bluetooth to estimate the distance between the group members. This thesis proposes using GPS with auxiliary Bluetooth signal strength to improve the accuracy of position to provide relative permutation between the group members. We propose a group positioning algorithm to obtain the relative permutated location, which is particularly used for application such as a bicycle team, climber team and so on.