Time Frequency Domain Amplitude Phase Algorithm for SAR Raw Data Compression
Ni Chong · Modern Radar · 2010
A compression method for synthetic aperture radar(SAR) raw data is proposed,which is based on time-frequency analysis theory and the nonstationary time-frequency oscillatory properties of SAR raw data.In this method,block raw data is converted into amplitude-phase data,then each block is transformed into time-frequency domain by 2D-RDGT and the desired bits are allocated to each frequency plane,finally each frequency plane is quantized with BAQ.The experiment results show that this method outperforms the existing methods not only in raw data domain but also in SAR image domain.