Integration of Ppp Gps and Low Cost Imu

GPS and low-cost INS integrated system are expected to become more widespread as a result of the availability of low cost inertial Micro-Electro-Mechanical Sensors (MEMS). Currently most of the integration systems are based on the differential GPS (DGPS) to ensure the navigation performance. However with the requirements of the base station, the system cost and complexity are significantly increased. With the advent of Precise Point Positioning (PPP), which is able to provide decimetre to centimetre accurate positioning accuracy without the need for a base receiver station, it opens the opportunity to develop a high performance GPS/INS navigation system based on only one GPS receiver. The motivation of this research is to investigate the integration of PPP GPS and low-cost INS such as MEMS for precise positioning and attitude determination. This paper will describe the PPP GPS technology and both loosely coupled and tightly coupled integration of PPP GPS and low-cost IMU. The navigation performance of integrated system of PPP GPS and low-cost IMU will be analyzed using road test dataset. The difference between loosely coupled system and tightly coupled system will also be analyzed based on the numerical results. * Corresponding author.