摘要: According to Doppler centroid shift and Doppler spectrum split, this paper proposes an adaptive Doppler NonuniformBit Allocation (NBA) approach based on one dimensional Look-Up Table (LUT). Combined with onedimensional quantizatio... 展开 According to Doppler centroid shift and Doppler spectrum split, this paper proposes an adaptive Doppler NonuniformBit Allocation (NBA) approach based on one dimensional Look-Up Table (LUT). Combined with onedimensional quantization and coding LUT, NBA approach forms the adaptive compression algorithm in frequencydomain. Meanwhile, this paper deduces the analytic function of the frequency spectrum of the echoes inrange and provides with the general scheme for its NBA. Numerical experiments results based on real SAR datashow that new algorithm has higher SNR and better robustness than FFT-BAQ. Theoretical analysis indicatesthat the calculation load of new algorithm is small so it can be easily applied in engineering. 收起