Self-calibration of a passive radar system using GSM base stations

This paper examines the self-calibration of a GSM passive radar system with an eigenstructure-based method. The aim of the calibration process is to compensate unknown phase and amplitude errors present in each received signal of a multichannel receiver using a linear antenna array. The phase and amplitude values are estimated using received signals of GSM base stations with known positions. To improve the estimation results, the method is adapted to process several base stations simultaneously. A confirmation of the algorithm is performed with simulations and by evaluating signal processing results of real data obtained in an experimental trial.