Abstract Bell, M. R., and Monrocq, S., Diversity Waveform Signal Processing for Delay–Doppler Measurement and Imaging, Digital Signal Processing12 (2002) 329–346 Coherent pulse–Doppler radar systems, whether used for synthetic aperture imaging or surveillance purposes, generally transmit a coherent pulse train made up of identical pulses. While these pulses may contain complex modulation—for example, linear FM chirps or frequency and phase coding—the fact remains that these pulses are usually identical. In this paper, we consider the potential advantages of pulse trains made up of pulses that are distinctly different from pulse-to-pulse. In particular, we investigate a signal processing algorithm that provides increased resolution and discrimination through delay–Doppler sidelobe suppression in the region surrounding the mainlobe of the delay–Doppler response.