High resolution UWB SAR based on OFDM architecture

High resolution Synthetic Aperture Radar (SAR) system has been investigated based on UWB-OFDM architecture. The Range-Doppler Algorithm (RDA) was used to construct a high resolution SAR image for simulation purpose. Suitable waveforms to achieve high resolution SAR imaging are proposed for both friendly and hostile environments. The proposed waveforms were tested for point scatterers and for full 2-D SAR image construction. Simulation results demonstrate the benefits of using UWB-OFDM waveforms for SAR system, such as dynamic spectrum allocation, anti-jamming potential through pulse diversity-while having a potential to produce high resolution target images. Wide-band Ambiguity Function (WAF) is derived and discussed in terms of UWB-OFDM waveform. The use of UWB-OFDM waveform for SAR system proves useful for high resolution image data collection for civilian purposes and provides significant anti-jamming capabilities for military purposes.