Abstract:

The radar signal model of cone targets with precession is provided, which can develop the relationship between microDoppler and precession parameters. Due to the characteristics of nonlinear frequency modulated and multicomponents in radar signal, generalized complextimefrequency distribution(GCD) is introduced to analyze the microDoppler of targets with precession, which has better concentration and timefrequency resolution compared with that of classical timefrequency distributions. Moreover, the estimation algorithm of microDoppler instantaneous freqThe radar signal model of cone targets with precession is provided, which can develop the relationship between microDoppler and precession parameters. Due to the characteristics of nonlinear frequency modulated and multicomponents in radar signal, generalized complextimefrequency distribution(GCD) is introduced to analyze the microDoppler of targets with precession, which has better concentration and timefrequency resolution compared with that of classical timefrequency distributions. Moreover, the estimation algorithm of microDoppler instantaneous frequency based on GCD and Viterbi method is proposed to reduce the effect of crossterm artifacts and noise, as well as improve the estimating precision. The performance of the estimation algorithm is validated with simulated data and radar data.uency based on GCD and Viterbi method is proposed to reduce the effect of crossterm artifacts and noise, as well as improve the estimating precision. The performance of the estimation algorithm is validated with simulated data and radar data.