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In this study, the performance of three phase-modulated signals used in airborne Synthetic
Aperture Ladar (SAL) is investigated. The transmitting and receiving modes and imaging
processing methods for these signals are studied. Considering that the swath of the
airborne SAL is very narrow, in order to reduce the AD sampling rate of the wideband
signal, a “phase-dechirping” receiving mode is proposed for the phase-modulated signal
based on the Linear Frequency Modulation (LFM) signal. The imaging simulation results
for these three phase-modulated signals validate the effectiveness of the proposed