[Retracted] Magnetic Matching-Aided Indoor Localization System Based on a Waist-Mounted Self-Contained Sensor Array

Algorithm 3

Magnetic fingerprint matching algorithm for sensor array.

Input: (raw magnetic field data collected by the sensor array) and (magnetic fingerprint database)

1: loop

2: Calibrate and project the raw magnetic signal.

3: Using our proposed single-step hybrid magnetic fingerprint construction method, extract the magnetic sequence to be matched at each step of each sensor.

4: Calculate fingerprint distance by the DTW algorithm.

5: Estimate the position of each magnetic fingerprint by a minimum distance.

6: end loop

Output: Four sets of position predictions based on sensor array calculations.