A method for digital wireless communication through a barrier (6) made of a conductive material, preferably metal, consisting in:
- transmission of an encoded digital information using a transmitter (1), by generation of a static magnetic field with a stepwise variable spatial orientation of a magnetic induction vector on a first side of the barrier (6),
- reading a resulting spatial orientation of the magnetic induction vector on a second side of the barrier (6) using an at least one spatial orientation sensor of the magnetic induction vector located in a receiver (3), and decoding the encoded digital information from the stepwise variable spatial orientation of the magnetic induction vector using a reading system (4) connected to the receiver (3),
- wherein it comprises the following steps:
- a. generating a static magnetic field with a first spatial orientation of the magnetic induction vector by an at least one induction coil, preferably of the transmitter (1), by exciting it with a current of a first constant intensity value on the first side of the barrier (6),
- b. reading, with the receiver (3), a first resulting spatial orientation of the magnetic induction vector of the static magnetic field produced by the at least one induction coil, which the first resulting spatial orientation of the magnetic induction vector of the static magnetic field is additionally distorted by the barrier (6) as well as an Earth's magnetic field, and magnetic objects in the vicinity of a communication path on the second side of the barrier (6);
- c. assigning a first digital value in the reading system (4) connected to the receiver (3) to the first resulting spatial orientation of the magnetic induction vector of the static magnetic field;
- characterized in that it further comprises the following steps:
- d. generating a static magnetic field with a second resulting spatial orientation of the magnetic induction vector of the static magnetic field by reversing the static magnetic field produced by the at least one induction coil by changing the value or polarity of the excitation current of said at least one induction coil;
- e. reading, with the receiver (3), the second resulting spatial orientation of the magnetic induction vector of the static magnetic field produced by the at least one induction coil, which the second resulting spatial orientation of the magnetic induction vector of the static magnetic field is additionally distorted by the barrier (6) as well as Earth's magnetic field, and magnetic objects in the vicinity of the communication path on the second side of the barrier (6);
- f. assigning a second digital value in the reading system (4) connected to the receiver (3) to the second resulting spatial orientation of the magnetic induction vector of the static magnetic field;
- g. encoding a digital information as a sequence of combinations of at least the first or the second resulting spatial orientation of the magnetic induction vector of the static magnetic field by the transmitter (1);
- h. reading a combination of at least the first or the second resulting spatial orientation of the induction vector of the static magnetic field by the receiver (3) and decoding the digital information in the reading system (4) connected to the receiver (3).