Synthetic Aperture Radar System Processing with a Nonuniform Pulse RepetitionInterval

摘要

Based on recent developments it has become feasible to combine the multiple pulseintegration of Synthetic Aperture Radar (SAR) with the temporal agility of nonuniform Pulse Repetition Intervals (PRIs). This combination can bring to the traditional SAR system both strong resistance to countermeasures and interception, and high sensitivity. A significant problem which must be addressed in SAR systems is the possible smearing of the azimuth dimension of the image due to Doppler sidelobes which are too high. This issue is even more serious with a nonuniform PRI waveform. One method for increasing the sidelobe rejection capability of these waveforms is through the use of interpolation techniques. The improved performance obtained by this method is illustrated through the use of the two examples.