Title :
Improvement of the positioning accuracy of a software-based GPS receiver using a 32-bit embedded microprocessor
Author :
Sato, Go ; Asai, Takashi ; Sakamoto, Tadashi ; Hase, Tomohiro
Author_Institution :
Syst. LSI Dev. Center, Mitsubishi Electr. Corp., Japan
fDate :
8/1/2000 12:00:00 AM
Abstract :
This paper describes the improvement of the positioning accuracy of a GPS receiver, using software to apply the GPS to compact, hand-held devices. Differential GPS (DGPS) with a software FM demodulator, and a modified Kalman filter is proposed and applied to a GPS receiver. The positioning accuracy is, 35 m with a standalone GPS, 9 m with DGPS and 15 m with a Kalman filter. With both methods, the positioning accuracy is drastically improved to 2 m
Keywords :
Global Positioning System; Kalman filters; demodulators; digital signal processing chips; frequency modulation; radio receivers; 32 bit; 32-bit embedded microprocessor; DGPS; compact hand-held devices; differential GPS; modified Kalman filter; positioning accuracy; software FM demodulator; software-based GPS receiver; Aircraft navigation; Broadcasting; Costs; Demodulation; Global Positioning System; Hardware; Microprocessors; Microwave integrated circuits; Position measurement; Signal processing;
Journal_Title :
Consumer Electronics, IEEE Transactions on
