Methods and apparatus for detecting changes of positions of the transmitting and / or receiving devices such as in particular motor vehicle transceivers relative to each other

The application relates to methods and apparatus for detecting (CON) of changes of distances (d in particular distances (d with at least one distance determining means (CON) which is adapted to that in each case the distance between two (i, j) of the device transceivers (TRX1, TRX2, TRX3, TRX4, TRX5, TRX6) each representing current distance value (d and is provided with a comparing means (CON) is adapted that a comparison of at least one current distance value (d