On re-positioning of the PN coded magnetic markers system on road platform "Dot ITS"

This paper describes the re-positioning performance of the PN coded magnetic markers (PNCMM) positioning system on Road platform "Dot ITS". After deciding of the length and arrangement of the PN code (M sequence) for "Dot ITS", three types of positioning schemes were examined, that is, the scheme using only PNCMM, the scheme using distance information considering measuring errors, and the scheme using distance considering measuring errors. It is shown that the distance information assistance is very effective on re-acquisition after lane change.