One-Shot Parametric Delay-Doppler Estimation in OFDM Radar for ISAC

In this letter, we study one-shot parametric delay-Doppler estimation when orthogonal frequency division multiplexing (OFDM) signals are used for integrated sensing and communication (ISAC). For one-shot estimation using a single OFDM frame, we employ the dynamic mode decomposition (DMD) algorithm and perform separate estimations in the delay and Doppler domains to reduce computational complexity, which is particularly important for agile, real-time signal processing in dynamic environments. Simulation results demonstrate that the DMD-based approach achieves reasonable performance using only a single OFDM frame.