Comparison of azimuth estimation in PCL and MLAT systems applied on measured data

The paper deals with the azimuth estimation by passive coherent locator (PCL). PCL uses FM radio broadcasting in the VHF band. The amplitude monopulse, Bartlett method of direction of arrival and their combination are applied for the target azimuth estimation. The performance of these methods is presented on several simulations. Simulation results are validated by an outdoor measurement with mobile PCL demonstrator equipped with the uniform circular dipole antenna array consisting of six elements. The measured data have been recorded for fifty minutes and offline signal processing have been performed. Four FM transmitters have been processed independently. The estimated azimuths are compared with the associated detections from the multilateration (MLAT) system and the results are discussed.