Patent ID: 9551787
Date: 2017-01-24
CPC Classifications: G01C,G01S

Claim:
1. A process for the determination of a position change or a resting or a speed of an object, wherein at least one radio signal is received on said object at at least one first and one second point in time and a change of the phase of said radio signal is determined for the determination of a relative movement between source of the signal or a reference location and said object; and the relative movement between source of said signal or said reference location and said object is detected; and wherein the change of the phase is detected by: a. a first and a second phase measurement being carried out at said different first and second points in time on said at least one radio signal originating from said source location; and b. at least one first and one second reference phase measurement being carried out at a first reference-point in time and at a second reference-point in time on at least one reference-radio signal coming from said reference location which is spaced apart from said source location, wherein said at least one reference-radio signal presents one known or transmitted phase relation to the at least one radio signal; and c. with an assumed movement or resting of said object it is determined an expected phase for said second point in time of said second phase measurement, and an expected reference-phase on the basis of said first phase measurement, the time difference between said first and said second points in time, the phase relation(s), the first reference-phase measurement and the time difference between said first reference-point in time and said second reference-point in time; and wherein d. said expected phase and said expected reference-phase measurement, is compared to said second phase measurement and said second reference-phase measurement.