Experimental Demonstration of Single Pulse Imaging (SPI)

The single pulse imaging (SPI) algorithm was developed as a means to generalize adaptive pulse compression (APC) by incorporating fast-time Doppler, thereby enhancing separability of scatterers in both range and Doppler. Here, we modify this model-based method by introducing dynamic beamspoiling to provide additional robustness. Open-air experimental results for this robust instantiation of SPI are then shown using an ultrasonic testbed at a center frequency of 47.5 kHz, which is analogous to an RF center frequency of 41.25 GHz. The low propagation velocity and associated wavelength of sound permits meaningful emulation of the high speeds that introduce fast-time Doppler effects for RF operation.