Digital and Super-Resolution Ultra Wide Band Inter-Vehicle Localisation System

We develop a digital multiple-antenna ultra wide band frequency modulation radar system devoted to inter-vehicle localisation applications. In this system, the radio frequency signal received in each receiver is digitized by an analog-to-digital converter (ADC) at the intermediate frequency. The phase method is used for direction of arrival (DOA) and time of arrival (TOA) estimations that are used for localisation purpose based on the hybrid technique named DOA/TOA. The DOA is estimated by measuring the phase difference of the signals picked up by the elements in the antenna array and by using the MUSIC (multiple signal classification) algorithm; meanwhile the TOA estimation is based on the IFFT (inverse fast Fourier transform) or the MUSIC algorithm. The system presents a lot of advantages of ultra wide band technology; the digital solution in terms of signal processing by software radio without hardware changing; and the high resolution method for DOA/TOA estimation. The system is simulated using ADS (Advanced Design System) and Matlab is used for signal processing. The simulation results show a promising solution for an inter-vehicle localisation system in particularly and for localisation applications in general.