Wavelet domain SAR raw data compression algorithm
Zhigang Pan, Wang Yanfei · Systems engineering and electronics · 2006
Synthetic aperture radar(SAR) raw data has low correlation between its' samples,in order to increase the compression ratio,a de-correlation stage is needed.A technique for compressing SAR raw data using lifting wavelet transform is considered.Due to the statistical properties of SAR signal,a proper sub-band coefficients quantization bit allocation algorithm is presented.The optimum scalar quantizer optimized for Gaussian statistics signal is used to encoding the wavelet coefficients.The performances achieved in terms of certain quality parameters have been evaluated.These show an increased performance in this method with respect to conventional methods.