Amplitude-phase compensation based parallel implementation of real-time SAR/ISAR

A novel fast and parallel method to realize big-sample-size range-compression (RC) in real-time SAR/ISAR systems based on subbanding and amplitude-phase compensation is introduced. It is assumed that pulse compression will be performed in the subband domain. An innovative algorithm is presented that simplifies the design complexity of all FIR filterbanks used in the subbanding process including the analysis filterbanks (used to decompose return signals into narrowband components), the synthesis filterbanks (used when combining subband components after processing), and the pulse compression generating filterbanks (used to generate subband pulse compression filters from a wideband pulse compression filter), and reduces filter orders, while guaranteeing RC performance. Moreover, it compensates the amplitude-phase errors caused by signal-generating and echo-sampling modules.