TUTCRIS - Tampereen teknillinen yliopisto


Performance enhancements for embedded software implementation of GNSS navigation algorithms



OtsikkoIndustrial Embedded Systems - IES'2006
DOI - pysyväislinkit
TilaJulkaistu - 2006
OKM-julkaisutyyppiA4 Artikkeli konferenssijulkaisussa
TapahtumaIndustrial Embedded Systems - IES'2006 - Antibes Juan-Les-Pins, Ranska
Kesto: 18 lokakuuta 200620 lokakuuta 2006


ConferenceIndustrial Embedded Systems - IES'2006
KaupunkiAntibes Juan-Les-Pins


Calculation of a navigation solution in a GNSS receiver requires a number of different calculations to be carried out. In this paper, a number of software optimizations that can be used in the calculation of a navigation solution without decreasing the accuracy of the result are presented. Also, some optimizations that appeared to be unsuitable for navigation solution and could not be used are shown. Some attention is put on limited capabilities of embedded hardware (e.g. single-precision FPU) that may be used in GNSS receiver. Software was implemented in ANSI-compatible C language, built for ARM platform and executed on ARM instruction set simulator. Its performance was measured in execution time and estimated Whetstone FLOPs. Presented complexity budget shows the amount of calculations required by each stage of the solution.