The Journal of The Institute of Image Information and Television Engineers
Online ISSN : 1881-6908
Print ISSN : 1342-6907
ISSN-L : 1342-6907
Method of Accelerating GPS Navigation Program for a 32-bit MCU without FPU
Liou-Tzung GuoTakashi AsaiMaiko TarukiTadashi SakamotoTomohiro Hase
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1999 Volume 53 Issue 10 Pages 1449-1454

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Abstract
This paper describes the design and implementation of an accelerated Global Positioning System (GPS) navigation program for a 32-bit embedded microcontroller unit without a floating-point processing unit. By optimizing the software floating-point library, introducing a new floating-point format and improving the math functions, the new GPS navigation program saves about 90% of the execution time compared to that implemented by a GNU C compiler and the precision is degraded by only 0.6%.
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