Method for reducing micro-Doppler effect in aircraft ISAR imaging based on compressed sensing

The micro-Doppler effect in inverse synthetic aperture radar (ISAR) imaging for aircrafts may impair the imaging quality of the main body, which affects application in target discrimination. The current available micro-Doppler effect reducing techniques are mainly complex and do not meet the requirement of real-time process. In the reported work, the profile flicker of micro-Doppler echoes is investigated by theoretical analysis and simulation. With the utilisation of this feature and based on compressed sensing, a new method which can reduce the micro-Doppler effect by preserving the information of aircrafts simultaneously is proposed. This method avoids the transform of the data field and the calculation is much less than the existing techniques. The validity is demonstrated by real data processing results.