FENG De-jun, WANG Xue-song, LIU Jia-qi, et al. Movement Parameter Estimation and Scattering Centers Reconstruction of Extend Target Using Double-Dechirping[J]. Acta Electronica Sinica, 2009, 37(8): 1768-1772.
FENG De-jun, WANG Xue-song, LIU Jia-qi, et al. Movement Parameter Estimation and Scattering Centers Reconstruction of Extend Target Using Double-Dechirping[J]. Acta Electronica Sinica, 2009, 37(8): 1768-1772.DOI:
The echo’s mathematic model of movement target for wideband linear frequency modulated signal in STRETCH processing is deduced
which is demonstrated to be a muticomponent polynomial phase signals (mc-pps).The defect of processing mc-pps using time-frequency analysis and polynomial phase transform (PPT) are pointed out.And then
a new algorithm of estimation movement parameter and reconstruction scattering centers of extend radar target is proposed
which can avoid loss of energy and frequency resolution of auto-correlation by using double-dechirp.According to the characteristic of power spectrum
the proposed algorithm adopts power maxima criterion suppressing crossterms and improves performance of parameter estimation by using iterative algorithm.Furthermore
the ESPRIT algorithm supersedes FFT algorithm for improving estimation accuracy.Simulation results show that the proposed method can extract movement feature and reconstruct scattering centers effectively