Abstract: The linear step frequency pulse compression waveform suffers from: a) range ambiguities due to periodicities in the discrete Fourier transform (DFT) and, b) signal-to-noise ratio (SNR) losses due to amplitude weighting used to suppress nominal range sidelobes. Mark Walbridge of DERA Malvern, UK, has proposed a nonlinear step frequency waveform which is derived from sampling a Dolph-Chebyshev weighting function. The waveform does not exhibit range ambiguities and achieves low near-in sidelobes without incurring the SNR loss associated with conventional sidelobe suppression techniques. This paper assesses an implementation of the non-linear step frequency waveform by quantifying range sidelobes, range resolution, and range- Doppler coupling. The waveform has application in ultra-high range resolution profile generation. !5
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