METHOD AND SYSTEM FOR INDOOR GEOLOCATION USING AN IMPULSE RESPONSE FINGERPRINTING TECHNIQUE

摘要

A system and method for for predicting the location of a transmitter in anindoor zone of interest. The system comprises a fixed receiver for receiving asignal from the transmitter, the receiver deriving a fingerprint from thereceived signal, and a trained neural network. The trained neural networkpredicts the transmitter location from the fingerprint. The method comprisesthe steps of providing a receiver having a fixed location, receiving a signaltransmitted from the transmitter at said receiver, deriving a fingerprint fromsaid received signal, supplying said fingerprint to an input of a trainedneural network, and reading the predicted location from an output of saidneural network. A method for training an artificial neural network forpredicting a location of a transmitter in an indoor zone of interest where thenetwork is comprised of a plurality of weights and biases is also shown. Themethod comprises the steps of collecting a training data set comprising aplurality of fingerprints and corresponding locations inputting the trainingdata set to the neural network, and adjusting the weights and the biases byminimising a sum of squares error function The collecting step comprises thesteps of a) placing a test transmitter at a new location within the zone ofinterest, b) transmitting a signal from the test transmitter to a receiver, c)extracting a fingerprint from the received signal, d) associating thefingerprint with the new location and e) repeating steps a), b), c) and d)throughout the zone of interest.