Zhang Wen-chao, Wang Yan-fei, Pan Zhi-gang. SAR Raw Data Compression Based on 2D Real-Valued Discrete Gabor Transform[J]. Journal of Electronics & Information Technology, 2008, 30(3): 569-572. doi: 10.3724/SP.J.1146.2006.01285
Citation:
Zhang Wen-chao, Wang Yan-fei, Pan Zhi-gang. SAR Raw Data Compression Based on 2D Real-Valued Discrete Gabor Transform[J]. Journal of Electronics & Information Technology, 2008, 30(3): 569-572. doi: 10.3724/SP.J.1146.2006.01285
Zhang Wen-chao, Wang Yan-fei, Pan Zhi-gang. SAR Raw Data Compression Based on 2D Real-Valued Discrete Gabor Transform[J]. Journal of Electronics & Information Technology, 2008, 30(3): 569-572. doi: 10.3724/SP.J.1146.2006.01285
Citation:
Zhang Wen-chao, Wang Yan-fei, Pan Zhi-gang. SAR Raw Data Compression Based on 2D Real-Valued Discrete Gabor Transform[J]. Journal of Electronics & Information Technology, 2008, 30(3): 569-572. doi: 10.3724/SP.J.1146.2006.01285
This paper proposes a compression method for Synthetic Aperture Radar (SAR) raw data,which is based on time-frequency analysis theory and the linear frequency modulation properties of the SAR raw data. In this method, the raw data of I and Q channels is divided into blocks at first, then each block is transformed into time-frequency domain by 2D-RDGT (Two-Dimensional Real valued Discrete Gabor Transform) and the desired bits are allocated to each frequency plane, finally each frequency plane is quantized with BAQ(Block Adaptive Quantization).The same raw data is experimented with this method and the existing methods.The experiments results show that this method outperforms the existing methods in raw data domain and SAR image domain.
Huneycutt B L. Spaceborne imaging Radar-C instrument[J].IEEE Trans. on Geosci. and Remote Sensing.1989, 27(2):164-169[2]Kwok R and Johnson W T K. Block adaptive quantization ofMagellan SAR data[J].IEEE Trans. on Geosci. and RemoteSensing.1989, 27(4):375-383[3]Moreira A and Blaser F. Fusion of block adaptive and vectorquantizer for efficient SAR data compression. in Proceedingsof the International Geoscience Remote Sensing Symposium,Tokyo, 1993: 1583-1585.[4]姚世超, 王岩飞, 张冰尘, 廖蜀燕. 合成孔径雷达原始数据幅相压缩算法[J].电子与信息学报.2002, 24(11):1627-1633浏览[5]Pascazio V and Schirinzi G. Wavelet transform coding forSAR raw data compression. Proc. IGARSS, Hamburg, 1999:2251-2253.[6]Pascazio V and Schirinzi G. SAR phase history datacompression by using wavelet packets. Proc. IGARSS, Hawaii,2000: 2639-2641.[7]David L and Donoho M V. Data compression and harmonicanalysis [J].IEEE Trans. on Information theory.1998, 44(6):2435-2476[8]张贤达, 保铮. 非平稳信号分析与处理[M]. 北京: 国防工业出版社, 1998, 109-152.[9]Qian Shie, Chen Dapang. Discrete Gabor transform[J].IEEETrans. on Signal processing.1993, 41(7):2429-2438[10]Tao Liang and Kwan H K. 2-D real Gabor transform.Proceeding of the 1999 IEEE Canadian Conference onElectrical and Computer Engineering, Edmonton, Alberta,Canada, 1999, 831-834.王宏禹. 非平稳随机信号分析与处理[M]. 北京: 国防工业出版社, 1999: 126-172.[11]Baxter R A. SAR image compression with the Gabortransform [J].IEEE Trans. on Geoscience and remote sensing.1999, 37(1):574-588