The invention relates to a Wi-Fi (
wireless fidelity) positioning
fingerprint database construction method. The major problem for the positioning method based on
signal fingerprints is indoor environment surveying and position
fingerprint acquisition with the heavy
workload. Besides, with the change of the indoor environment temperature, the
layout and the like, the positioning accuracy is substantially reduced. The method comprises steps as follows: firstly, selecting the total number of reference points at equal intervals and acquiring
RSS (received
signal strength) at the selected reference points; then mapping physical positions of the reference points and corresponding
signal fingerprints into small images, and enlarging the images with an improved bi-cubic image interpolation method; finally, performing
image denoising with an adaptive
median filter method, mapping the images into
fingerprint information, filtering out singular points, obtaining
RSS estimated values of all the reference points in the environment, and constructing a Wi-Fi positioning
fingerprint database. The method can effectively reduce
data acquisition manpower and time and can be applied to indoor
wireless communication network environments.