Nonlinear stepped chirp waveforms with subpulse processing for range side lobe suppression

Byron M. Keel; James A. Saffold; Mark R. Walbridge; John Chadwick

doi:10.1117/12.319437

26 August 1998 Nonlinear stepped chirp waveforms with subpulse processing for range side lobe suppression

Byron M. Keel, James A. Saffold, Mark R. Walbridge, John Chadwick

Author Affiliations +

Proceedings Volume 3395, Radar Sensor Technology III; (1998) https://doi.org/10.1117/12.319437
Event: Aerospace/Defense Sensing and Controls, 1998, Orlando, FL, United States

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.

Citation Download Citation

Byron M. Keel, James A. Saffold, Mark R. Walbridge, and John Chadwick "Nonlinear stepped chirp waveforms with subpulse processing for range side lobe suppression", Proc. SPIE 3395, Radar Sensor Technology III, (26 August 1998); https://doi.org/10.1117/12.319437

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