비선형 호핑 패턴의 Stepped-Carrier OFDM 파형을 활용한 거리-도플러 이미징 기법 연구 = Study on Range-Doppler Imaging Using Stepped-Carrier OFDM Waveforms with a Nonlinear Hopping Pattern

다국어 초록 (Multilingual Abstract)

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

참고문헌 (Reference)

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