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| A New Method for Estimating the Rotation Angle of ISAR Image |
| Wang Yong; Jiang Yi-cheng |
| Research Institute of Electronic Engineering Technology, Harbin Institute of Technology, Harbin 150001, China |
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Abstract The estimation of rotation angle is the precondition for ISAR imaging. In this passage, a new method based on the analysis of the echo signals is proposed. The signals in different range bin are approximated as the multi-component third-order polynomial signals, and the proportion of third-order phase coefficient to first-order phase coefficient is constant just equal to the square of the rotation rate. Then the parameters of the third-order polynomial signal are estimated by the maximum likelihood method. The results of real data show the validity of the method proposed.
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Received: 12 August 2005
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2007, Vol. 29 
