Study on Range-Doppler Imaging Using Stepped-Carrier OFDM Waveforms with a Nonlinear Hopping Pattern

To increase the range resolution of OFDM radars, a wide bandwidth baseband signal is required, which increases ADC/DAC sampling rate. Although radar processing with linear stepped-carrier (SC) waveforms has been developed to overcome it, pattern in subband allocation does not provide flexibility spectrum utilization. In this study, we proposed range-Doppler (RD) imaging method using SC nonlinear hopping pattern. addition, for calibrating Doppler estimation error owing Numerical simulations were used verify that yielded similar RD map and MSE performance compared conventional OFDM, thereby providing