  The stepped-frequency (SF) waveform is an effective way to achieve high range
resolution (HRR) in modern radars. In this paper, we determine some fundamental
limits of SF waveforms on ambiguity, stability and accuracy of stable targets
profiling, and velocity compensation accuracy of moving targets. The
investigation shows that via using the information contained in both phase and
envelop of the echo signal, the radar can achieve HRR profiles without
ambiguity under a looser criterion, and can compensate the range shift caused
by targets' radial velocity. The results of this paper can help the SF waveform
design and the processing algorithm development for HRR profiling and velocity
compensation.
