Abstract:

A novel method for synthesizing the high resolution range profile (HRRP) with respect to the stepped frequency waveforms, which is based on dechirp processing, is proposed. First, the received steppedfrequency pulses are dechirped by local reference signals. The wideband echoes are obtained by joining the dechirped pulses in order in timedomain. Finally, the 1-D HRRP and the 2-D inverse synthetic aperture radar (ISAR) images can be obtained according to the traditional processing. The up sampling, frequency shift and phase compensation operations are avoided with this new method, thus the processing complexity is reduced and this new method is easier to implement in radar systems.