High Resolution Imaging Algorithm For Inverse Synthetc Aperture Imaging Ladar

Inverse synthetic aperture imaging laser radar can achieve moving target ultra-high resolution real-time imaging with moving target。 Based on sending laser signal, this radar uses inverse synthetic aperture principle to image the target, however, the laser signal with the character of high carrier frequency, oversized bandwidth and extremely short wavelength, so it is not suitable for using the traditional microwave band inverse synthetic aperture laser radar to handle the common echo signal model target.Through the principle analysis of the Inverse synthetic aperture imaging laser radar imaging system, the Inverse synthetic aperture imaging laser radar imaging system is built. Then the signal model of the Inverse synthetic aperture imaging laser radar imaging system is studied and the R-D arithmetic from the inverse synthetic aperture laser radar imaging system is used into the imaging simulation of the Inverse synthetic aperture imaging laser radar imaging system. After that, an improved arithmetic is proposed and in this arithmetic the echo signal is compensated through the time-frequency analysis of the detected beat signal,which is analyzed by retaking WVD distribution and radon transform. Through the comparison of the traditional algorithm and the improved algorithm, it is proved that higher resolution images can be obtained by the improved algorithm, so this algorithm is more applicable to the Inverse synthetic aperture imaging laser radar imaging system...