Calibration and Positioning of nonlinear wideband FMCW radar

Abstract

The nonlinearity in the transmitted signal of the Frequency-modulated continuous-wave (FMCW) radar will greatly reduce the accuracy of target positioning. This paper establishes the third order signal model to quantify the nonlinearity for wideband FMCW radars. The signal measurement of reference object can estimate the parameters very well, then the nonlinear sampling of time domain greatly improves the accuracy of RF system measurement, and then a more accurate Positioning model of three-dimensional space target is proposed.