A New Method of Rapid Linearity Detection of LFMCW Radar
Linearity of VCO directly impacts on the range resolution of LFMCW radar, therefor, a linearity correction based on linearity detection is usually adoptted in practical applications. This paper proposes a new method of rapid linearity detection of LFMCW radar. First, estimate and correct the instantaneous phase. Then, fit a straight line for the instantaneous phase of difference frequency signal by least square approximation algorith. Finally, estimate the instantaneous Frequency-Modulation rate of FM signal. Simulation results show that the method is valid.
Y. L. Wang et al., "A New Method of Rapid Linearity Detection of LFMCW Radar", Applied Mechanics and Materials, Vols. 48-49, pp. 88-91, 2011