Method for determining the spatial position of an object, electronic circuit and electronic system

Method for determining the spatial position of an object with the following steps:

• sending a number of M orthogonal code sequences via a number of at least M antennas with the help of CDMA, in which each code sequence is emitted via a different M antenna, and in which the M antennas are distributed in a spatial area,
• receiving a partial amount of the code sequences through a CDMA receiver of the object,
• allocating an identifier to each of the code sequences received through the CDMA receiver,
• storing the identifiers in an electronic memory of the object,
• determining the spatial position relative to the antennas with the help of an allocation instruction that allocates to each identifier one of the antennas and/or one of the antenna positions, through the object,
• storing the spatial position in the electronic memory of the object,
• transmitting the spatial position stored in the electronic memory or transmitting a signal that is derived thereof, via a contactless communication interface of the object.

Electronic circuit comprising:

• a CDMA receiver that is designed for the simultaneous receipt of a number of M orthogonal code sequences,
• an electronic memory in which an allocation instruction is stored that allocates to each code sequence an identifier,
• a processor for accessing the electronic memory in order to determine with the help of the allocation instruction the identifier of one of the CDMA receivers, and in order to store the identifier/s that was/were detected,
• a contactless communication interface in order to transmit the stored identifiers.

Electronic circuit comprising:

• a CDMA receiver that is designed to receive a number of M orthogonal code sequences,
• an electronic memory in which an allocation instruction is stored, whereby through the allocation instruction each code sequence is assigned to one of the antennas. whereby this allocation contains an information regarding the spatial location of the respective antenna,
• a processor for accessing the electronic memory in order to determine the position of the electronic circuit relative to the antennas, by determining with the help of the code sequences received from the CDMA receiver, the information regarding the spatial location of those antennas by which the code sequences were received, and by deriving from the detected spatial positions of the antennas the position of the electronic circuit and from there producing a position signal,
• a contactless communication interface for transmitting the position signal.