Experimental Demo of Range Disambiguation via Slow-time Coding & Reiterative Super-Resolution
Jennifer E. Quirk, Patrick M. McCormick, Jonathan W. Owen, Shannon D. Blunt · 2024
Slow-time coding (STC) has previously been examined for MIMO radar and disambiguation of multiple range ambiguities. Using STC with non-adaptive Doppler processing often results in high Doppler "cross-ambiguity" sidelobes that can severely hinder range disambiguation despite the degree of separability imparted by STC. To enhance this separability, a "multi-range" modification to the reiterative super-resolution (RISR) approach is examined that accounts for the distinct range interval structure from STC and is denoted as MR-RISR. The efficacy of this implementation is examined using open-air measurements. Further, incorporation of clutter cancellation via the previously developed background supplementary cancellation (BaSC) arrangement is shown to yield further improvement by reducing the necessary dynamic range for which Doppler estimation is needed.