Developing a code-phase based algorithm for improving the autonomous positioning of single frequency GPS receiver

Abstract EN

Normally, positioning with GPS can be performed by either of two ways : single point positioning SPP, or differential (relative) positioning DGPS.

SPP employs one GPS receiver, while DGPS employs two (or more) GPS receivers simultaneously tracking the same satellites.

No attention was paid before for the autonomous position produced automatically by default by all receivers' types.

Additionally, it is known, that no autonomous solution produced by code-phase, only code solution is registered in all published sources which was found today.

The current research pays attention to how the autonomous solution can be improved.

Also it submits a new algorithm based upon utilizing both code and phase produced by single frequency receiver.

In this algorithm a trial was done to improve the ambiguities values of the phase which be reflected on the obtained autonomous positioning.

Finally two tests were conducted, one in static mode and the other in kinematic mode.

The analysis results show a remarkable performance in the quality of the obtained autonomous positioning.