Multi-stage multi-resolution fast back-projection imaging algorithm

作者：Li Yang Huan^*; Song Qian; Wang Peng Yu; Jin Tian; Zhou Zhi Min

来源：Acta Electronica Sinica, 2011, 39(3): 518-524.

• Back-projection
• Back-projection imaging
• Computation efficiency
• FFBP
• Imaging in polar coordinates
• Multi-resolutions
• Multi-stage
• Nonuniform aperture
• Range error
• Sub-apertures
• Subaperture
• Subimages
• UWB signals

The basic method to improve efficiency of the BP(Back-Projection) algorithm is the sub-aperture';s way. Choosing the length of sub-apertures and the resolution of sub-images becomes the most crucial step that decides the computation efficiency. The condition that limits the image resolution is analyzed taking the bandwidth and the range error into account. Then a same result presenting the relationship between the sub-aperture length and the resolution is received. A method for dividing the sub-aperture and choosing the image resolution in UWB signal';s circumstance is presented based on the former result. Besides the Multi-Stage Multi-Resolution Back Projection (MSMRBP) algorithm is presented to suit the nonuniform aperture condition. At last the outside experiment';s results are presented to support the former conclusion.

• 出版日期2011