Abstract:

The theory of inverse synthetic aperture radar (ISAR) imaging with chirp signals based on rangeDoppler algorithm and the principle of phase compensation for intermittent signal connection are analyzed. On the basis of that, aiming at the character of the ISAR spectrogram, a novel method of connecting different spectrograms via compensating phases approximately with waveform evaluation criterion and genetic algorithm is proposed. Furthermore, the final ISAR image can be achieved by using the connected spectrogram. Simulation results show that the proposed method is simple, easy to operate and very practical, and the image effect can be improved by using the proposed method.