Time of Arrival Independent Positioning System Based on UWB Technologies

The improved indoor positioning system is proposed. Using Angle of Arrival type (AoA) principle the system permits to determine the receiver coordinates on a plane. The phenomenon of the change of time form of radiated electromagnetic wave for an impulse antenna is used. To distinguish time signals radiated by two different antennas at different angles the artificial neural network is applied. The knowledge of a distance between antennas and angles of radiation give us possibility to calculate the position of the receiver. The distinguishing of each antenna is realized by their excitation by means of nanosecond impulses with different duration. The electromagnetic part of the problem is solved numerically by the FDTD method. There is no need to provide the time synchronization between radiators and receivers. The proposed system is not sensitive to traditional hostile jamming. The purpose of the work is to improve the system by means of the application of neural network with additional information capacity that permits to provide stability of the recognition system to accidental time shifts in impulse receiving.