Clock skewcalibration for UWB ranging

In this paper, we propose a clock skew calibration method for rang-ing applications using an ultra-wideband (UWB) signal. The clock skew is one of the main error sources in time-of-arrival (TOA) based UWB ranging, since a long ranging signal is required to obtain a sufficiently high signal-to-noise ratio (SNR). Therefore, the clock skew calibration is essential for accurate TOA ranging. We propose to estimate the clock skew in the frequency domain to take full ad-vantage of the periodic property of the ranging signal, which allows the proposed method to reach super-resolution. Simulation results corroborate the efficiency of the proposed method. 1