Nonlinearity Correction for Range Estimation in FMCW Millimeter-Wave Automotive Radar

In this paper, we propose a computational correction algorithm to reduce the effect of source nonlinearity on range estimation for millimeter-wave frequency modulated continuous wave (FMCW) automotive radars. With a transient parametric modeling on the source nonlinearity function, the proposed algorithm aims to jointly estimate range parameters of multiple reflectors and parametric nonlinearity coefficients from the beat signal without using a reference, e.g., a dedicated delay line or a reflector at a known distance. Preliminary numerical results are provided to validate the effectiveness of the proposed algorithm.